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  Subjects -> ENGINEERING (Total: 2431 journals)
    - CHEMICAL ENGINEERING (210 journals)
    - CIVIL ENGINEERING (203 journals)
    - ELECTRICAL ENGINEERING (112 journals)
    - ENGINEERING (1271 journals)
    - ENGINEERING MECHANICS AND MATERIALS (402 journals)
    - HYDRAULIC ENGINEERING (57 journals)
    - INDUSTRIAL ENGINEERING (77 journals)
    - MECHANICAL ENGINEERING (99 journals)

CIVIL ENGINEERING (203 journals)                  1 2 | Last

Showing 1 - 200 of 203 Journals sorted alphabetically
ACI Structural Journal     Full-text available via subscription   (Followers: 20)
Acta Polytechnica : Journal of Advanced Engineering     Open Access   (Followers: 3)
Acta Structilia : Journal for the Physical and Development Sciences     Open Access   (Followers: 2)
Advances in Civil Engineering     Open Access   (Followers: 39)
Advances in Structural Engineering     Full-text available via subscription   (Followers: 32)
Agregat     Open Access   (Followers: 1)
Ambiente Construído     Open Access   (Followers: 1)
American Journal of Civil Engineering and Architecture     Open Access   (Followers: 34)
Architectural Engineering     Open Access   (Followers: 5)
Archives of Civil and Mechanical Engineering     Full-text available via subscription   (Followers: 3)
Archives of Civil Engineering     Open Access   (Followers: 12)
Archives of Hydro-Engineering and Environmental Mechanics     Open Access   (Followers: 2)
ATBU Journal of Environmental Technology     Open Access   (Followers: 4)
Australian Journal of Structural Engineering     Full-text available via subscription   (Followers: 6)
Baltic Journal of Road and Bridge Engineering     Open Access   (Followers: 1)
BER : Building and Construction : Full Survey     Full-text available via subscription   (Followers: 10)
BER : Building Contractors' Survey     Full-text available via subscription   (Followers: 2)
BER : Building Sub-Contractors' Survey     Full-text available via subscription   (Followers: 2)
BER : Survey of Business Conditions in Building and Construction : An Executive Summary     Full-text available via subscription   (Followers: 3)
Bioinspired Materials     Open Access   (Followers: 5)
Bridge Structures : Assessment, Design and Construction     Hybrid Journal   (Followers: 14)
Building & Management     Open Access   (Followers: 1)
Building and Environment     Hybrid Journal   (Followers: 15)
Building Women     Full-text available via subscription  
Built Environment Project and Asset Management     Hybrid Journal   (Followers: 14)
Bulletin of Pridniprovsk State Academy of Civil Engineering and Architecture     Open Access   (Followers: 6)
Canadian Journal of Civil Engineering     Hybrid Journal   (Followers: 13)
Case Studies in Engineering Failure Analysis     Open Access   (Followers: 6)
Case Studies in Nondestructive Testing and Evaluation     Open Access   (Followers: 11)
Case Studies in Structural Engineering     Open Access   (Followers: 9)
Cement and Concrete Composites     Hybrid Journal   (Followers: 20)
Challenge Journal of Concrete Research Letters     Open Access   (Followers: 3)
Challenge Journal of Structural Mechanics     Open Access   (Followers: 6)
Change Over Time     Full-text available via subscription   (Followers: 2)
Civil and Environmental Engineering     Open Access   (Followers: 8)
Civil And Environmental Engineering Reports     Open Access   (Followers: 7)
Civil and Environmental Research     Open Access   (Followers: 17)
Civil Engineering = Siviele Ingenieurswese     Full-text available via subscription   (Followers: 4)
Civil Engineering and Architecture     Open Access   (Followers: 22)
Civil Engineering and Environmental Systems     Hybrid Journal   (Followers: 3)
Civil Engineering and Technology     Open Access   (Followers: 12)
Civil Engineering Dimension     Open Access   (Followers: 10)
Civil Engineering Infrastructures Journal     Open Access   (Followers: 1)
Cohesion and Structure     Full-text available via subscription   (Followers: 2)
Composite Structures     Hybrid Journal   (Followers: 284)
Computer-aided Civil and Infrastructure Engineering     Hybrid Journal   (Followers: 11)
Computers & Structures     Hybrid Journal   (Followers: 38)
Concrete Research Letters     Open Access   (Followers: 7)
Construction Economics and Building     Open Access   (Followers: 4)
Construction Engineering     Open Access   (Followers: 11)
Construction Management and Economics     Hybrid Journal   (Followers: 22)
Construction Science     Open Access   (Followers: 5)
Constructive Approximation     Hybrid Journal  
Curved and Layered Structures     Open Access   (Followers: 3)
DFI Journal : The Journal of the Deep Foundations Institute     Hybrid Journal   (Followers: 1)
Earthquake Engineering and Structural Dynamics     Hybrid Journal   (Followers: 17)
Enfoque UTE     Open Access   (Followers: 4)
Engineering Project Organization Journal     Hybrid Journal   (Followers: 7)
Engineering Structures     Hybrid Journal   (Followers: 13)
Engineering Structures and Technologies     Open Access   (Followers: 2)
Engineering, Construction and Architectural Management     Hybrid Journal   (Followers: 10)
Environmental Geotechnics     Hybrid Journal   (Followers: 5)
European Journal of Environmental and Civil Engineering     Hybrid Journal   (Followers: 9)
Fatigue & Fracture of Engineering Materials and Structures     Hybrid Journal   (Followers: 17)
Frontiers in Built Environment     Open Access  
Frontiers of Structural and Civil Engineering     Hybrid Journal   (Followers: 6)
Geomaterials     Open Access   (Followers: 3)
Geosystem Engineering     Hybrid Journal   (Followers: 1)
Geotechnik     Hybrid Journal   (Followers: 3)
Géotechnique Letters     Hybrid Journal   (Followers: 7)
GISAP : Technical Sciences, Construction and Architecture     Open Access  
HBRC Journal     Open Access   (Followers: 2)
Hormigón y Acero     Full-text available via subscription  
HVAC&R Research     Hybrid Journal  
Indonesian Journal of Urban and Environmental Technology     Open Access  
Indoor and Built Environment     Hybrid Journal   (Followers: 2)
Infrastructure Asset Management     Hybrid Journal   (Followers: 3)
Infrastructures     Open Access  
Ingenio Magno     Open Access   (Followers: 1)
Insight - Non-Destructive Testing and Condition Monitoring     Full-text available via subscription   (Followers: 30)
International Journal for Service Learning in Engineering     Open Access  
International Journal of 3-D Information Modeling     Full-text available via subscription   (Followers: 3)
International Journal of Advanced Structural Engineering     Open Access   (Followers: 17)
International Journal of Civil, Mechanical and Energy Science     Open Access   (Followers: 2)
International Journal of Concrete Structures and Materials     Open Access   (Followers: 15)
International Journal of Condition Monitoring     Full-text available via subscription   (Followers: 2)
International Journal of Construction Engineering and Management     Open Access   (Followers: 10)
International Journal of Geo-Engineering     Open Access   (Followers: 3)
International Journal of Geosynthetics and Ground Engineering     Full-text available via subscription   (Followers: 4)
International Journal of Masonry Research and Innovation     Hybrid Journal   (Followers: 1)
International Journal of Pavement Research and Technology     Open Access   (Followers: 6)
International Journal of Protective Structures     Hybrid Journal   (Followers: 6)
International Journal of Steel Structures     Hybrid Journal   (Followers: 2)
International Journal of Structural Engineering     Hybrid Journal   (Followers: 8)
International Journal of Structural Integrity     Hybrid Journal   (Followers: 2)
International Journal of Structural Stability and Dynamics     Hybrid Journal   (Followers: 7)
International Journal of Sustainable Built Environment     Open Access   (Followers: 5)
International Journal of Sustainable Construction Engineering and Technology     Open Access   (Followers: 8)
International Journal on Pavement Engineering & Asphalt Technology     Open Access   (Followers: 7)
International Journal Sustainable Construction & Design     Open Access   (Followers: 1)
Journal of Applied Research in Water and Wastewater     Open Access  
Journal of Bridge Engineering     Full-text available via subscription   (Followers: 14)
Journal of Building Engineering     Hybrid Journal   (Followers: 1)
Journal of Building Materials and Structures     Open Access   (Followers: 2)
Journal of Building Performance Simulation     Hybrid Journal   (Followers: 6)
Journal of Civil Engineering     Open Access  
Journal of Civil Engineering and Construction Technology     Open Access   (Followers: 15)
Journal of Civil Engineering and Management     Open Access   (Followers: 7)
Journal of Civil Engineering and Science     Open Access   (Followers: 9)
Journal of Civil Engineering Research     Open Access   (Followers: 7)
Journal of Civil Engineering, Science and Technology     Open Access   (Followers: 1)
Journal of Civil Society     Hybrid Journal   (Followers: 5)
Journal of Civil Structural Health Monitoring     Hybrid Journal   (Followers: 4)
Journal of Composites     Open Access   (Followers: 78)
Journal of Composites for Construction     Full-text available via subscription   (Followers: 13)
Journal of Computing in Civil Engineering     Full-text available via subscription   (Followers: 24)
Journal of Construction Engineering     Open Access   (Followers: 9)
Journal of Construction Engineering and Management     Full-text available via subscription   (Followers: 18)
Journal of Constructional Steel Research     Hybrid Journal   (Followers: 6)
Journal of Earth Sciences and Geotechnical Engineering     Open Access   (Followers: 4)
Journal of Fluids and Structures     Hybrid Journal   (Followers: 6)
Journal of Frontiers in Construction Engineering     Open Access   (Followers: 2)
Journal of Green Building     Full-text available via subscription   (Followers: 10)
Journal of Highway and Transportation Research and Development (English Edition)     Full-text available via subscription   (Followers: 14)
Journal of Infrastructure Systems     Full-text available via subscription   (Followers: 19)
Journal of Legal Affairs and Dispute Resolution in Engineering and Construction     Full-text available via subscription   (Followers: 5)
Journal of Marine Science and Engineering     Open Access   (Followers: 1)
Journal of Materials and Engineering Structures     Open Access   (Followers: 5)
Journal of Materials in Civil Engineering     Full-text available via subscription   (Followers: 8)
Journal of Nondestructive Evaluation     Hybrid Journal   (Followers: 9)
Journal of Performance of Constructed Facilities     Full-text available via subscription   (Followers: 3)
Journal of Pipeline Systems Engineering and Practice     Full-text available via subscription   (Followers: 6)
Journal of Rehabilitation in Civil Engineering     Open Access   (Followers: 3)
Journal of Solid Waste Technology and Management     Full-text available via subscription   (Followers: 1)
Journal of Structural Engineering     Full-text available via subscription   (Followers: 36)
Journal of Structural Fire Engineering     Full-text available via subscription   (Followers: 6)
Journal of Structural Mechanics     Open Access  
Journal of Structures     Open Access   (Followers: 4)
Journal of Sustainable Design and Applied Research in Innovative Engineering of the Built Environment     Open Access   (Followers: 1)
Journal of the Civil Engineering Forum     Open Access  
Journal of the South African Institution of Civil Engineering     Open Access   (Followers: 2)
Journal of Water and Environmental Nanotechnology     Open Access  
Journal of Water and Wastewater / Ab va Fazilab     Open Access  
Jurnal Spektran     Open Access   (Followers: 1)
Jurnal Teknik Sipil     Open Access  
Jurnal Teknik Sipil dan Perencanaan     Open Access   (Followers: 1)
Konstruksia     Open Access  
KSCE Journal of Civil Engineering     Hybrid Journal   (Followers: 2)
Latin American Journal of Solids and Structures     Open Access   (Followers: 4)
Materiales de Construcción     Open Access   (Followers: 1)
Mathematical Modelling in Civil Engineering     Open Access   (Followers: 4)
Media Komunikasi Teknik Sipil     Open Access  
Mokslas – Lietuvos ateitis / Science – Future of Lithuania     Open Access  
Nondestructive Testing And Evaluation     Hybrid Journal   (Followers: 15)
npj Materials Degradation     Open Access  
Obras y Proyectos     Open Access   (Followers: 1)
Open Journal of Civil Engineering     Open Access   (Followers: 9)
Photonics and Nanostructures - Fundamentals and Applications     Hybrid Journal   (Followers: 3)
Practice Periodical on Structural Design and Construction     Full-text available via subscription   (Followers: 3)
Proceedings of the Institution of Civil Engineers - Bridge Engineering     Hybrid Journal   (Followers: 8)
Proceedings of the Institution of Civil Engineers - Civil Engineering     Hybrid Journal   (Followers: 14)
Proceedings of the Institution of Civil Engineers - Management, Procurement and Law     Hybrid Journal   (Followers: 9)
Proceedings of the Institution of Civil Engineers - Municipal Engineer     Hybrid Journal   (Followers: 2)
Proceedings of the Institution of Civil Engineers - Structures and Buildings     Hybrid Journal   (Followers: 3)
Promet : Traffic &Transportation     Open Access  
Random Structures and Algorithms     Hybrid Journal   (Followers: 5)
Recent Trends In Civil Engineering & Technology     Full-text available via subscription   (Followers: 5)
Research in Nondestructive Evaluation     Hybrid Journal   (Followers: 6)
Resilience     Open Access   (Followers: 1)
Revista IBRACON de Estruturas e Materiais     Open Access   (Followers: 1)
Road Materials and Pavement Design     Hybrid Journal   (Followers: 11)
Russian Journal of Nondestructive Testing     Hybrid Journal   (Followers: 5)
Science and Engineering of Composite Materials     Hybrid Journal   (Followers: 61)
Selected Scientific Papers - Journal of Civil Engineering     Open Access   (Followers: 3)
Slovak Journal of Civil Engineering     Open Access   (Followers: 2)
Soils and foundations     Full-text available via subscription   (Followers: 5)
Steel Construction - Design and Research     Hybrid Journal   (Followers: 3)
Structural and Multidisciplinary Optimization     Hybrid Journal   (Followers: 10)
Structural Concrete     Hybrid Journal   (Followers: 11)
Structural Control and Health Monitoring     Hybrid Journal   (Followers: 8)
Structural Engineering International     Full-text available via subscription   (Followers: 11)
Structural Mechanics of Engineering Constructions and Buildings     Open Access   (Followers: 1)
Structural Safety     Hybrid Journal   (Followers: 6)
Structural Survey     Hybrid Journal  
Structure     Full-text available via subscription   (Followers: 24)
Structure and Infrastructure Engineering: Maintenance, Management, Life-Cycle Design and Performance     Hybrid Journal   (Followers: 12)
Structures     Hybrid Journal   (Followers: 1)
Study of Civil Engineering and Architecture     Open Access   (Followers: 10)
Superlattices and Microstructures     Hybrid Journal   (Followers: 2)
Surface Innovations     Hybrid Journal  
Technical Report Civil and Architectural Engineering     Open Access   (Followers: 1)
Teknik     Open Access  
Territorium : Revista Portuguesa de riscos, prevenção e segurança     Open Access  
The IES Journal Part A: Civil & Structural Engineering     Hybrid Journal   (Followers: 6)
The Structural Design of Tall and Special Buildings     Hybrid Journal   (Followers: 5)
Thin Films and Nanostructures     Full-text available via subscription   (Followers: 2)
Thin-Walled Structures     Hybrid Journal   (Followers: 4)
Transactions of the VŠB - Technical University of Ostrava. Construction Series     Open Access   (Followers: 1)
Transportation Geotechnics     Full-text available via subscription   (Followers: 1)
Transportation Infrastructure Geotechnology     Hybrid Journal   (Followers: 8)

        1 2 | Last

Journal Cover
Hormigón y Acero
Number of Followers: 0  
 
  Full-text available via subscription Subscription journal
ISSN (Print) 0439-5689
Published by Elsevier Homepage  [3162 journals]
  • Structural refurbishment strategies on industrial heritage buildings in
           Madrid: Recent examples
    • Abstract: Publication date: Available online 19 June 2018Source: Hormigón y AceroAuthor(s): Juan Rey Rey, Pablo Vegas González, Jacinto Ruiz Carmona Madrid has a large number of industrial buildings with historical character and great architectural heritage value that after its original industrial activity had been closed a large period of time. Fortunately in recent years several actions have been taken to recover this important historical heritage. These buildings have new uses which require in many cases major architectural and structural transformations, and these transformations must be done not only thinking of fulfilling the new role, but also preserving and enhancing the value of existing buildings.This paper discusses some common strategies applied to structural intervention on several buildings in which this task has been developed by Mecanismo Structural Engineering.ResumenMadrid cuenta con un número importante de edificaciones industriales de carácter histórico de gran valor arquitectónico y patrimonial que una vez cesado su uso industrial original habían quedado durante largo tiempo en desuso. Afortunadamente en los últimos años han sido varias las actuaciones encaminadas a recuperar ese importante Patrimonio Histórico, destinando los edificios a nuevos usos que requieren en muchos casos grandes transformaciones tanto a nivel arquitectónico como estructural, las cuales deben acometerse no solo pensando en cumplir la nueva función, sino en preservar y potenciar el valor de las edificaciones existentes.El presente artículo expone algunas estrategias comunes aplicadas a la intervención estructural sobre varios edificios en los que dicha tarea ha sido desarrollada por Mecanismo Ingeniería.
       
  • Evaluación de métodos para estimar la resistencia característica a
           compresión del hormigón en estructuras existentes a partir de la
           extracción y ensayo de testigos
    • Abstract: Publication date: Available online 19 June 2018Source: Hormigón y AceroAuthor(s): Alejandro Fernández Domínguez, Juan José Howland AlbearResumenEste trabajo está motivado por la ausencia en las normativas cubanas de un método para estimar la resistencia característica a compresión del hormigón en estructuras existentes a partir de la extracción de testigos. Se establece el estado del arte sobre el tema y se utilizan los resultados de ensayos a compresión de testigos extraídos de 15 estructuras existentes de hormigón armado, para evaluar los diversos métodos encontrados en la literatura. Los resultados evidencian una gran variación en los valores determinados por los diferentes métodos encontrados. Finalmente se efectúa la comparación entre dichos valores, se cuantifican las diferencias promedio entre los valores calculados por los diferentes métodos y se emiten criterios sobre la sensibilidad de sus resultados ante las características del lote de hormigón. This paper is motivated because of the absence in Cuban standards of a method to estimate the characteristic concrete compressive strength in existing structures from core test results. The state of the art on the subject is established and the results of core compressive strengths of 15 reinforced concrete structures were used to assess the different methods found on the literature. The results show a large dispersion on the values obtained by the different methods. Finally a comparison of these values it's made, the average differences between the methods are quantified and a criteria about the sensitivity of the methods to the concrete batch characteristics is defined.
       
  • Changes in mechanical properties of concrete due to ASR
    • Abstract: Publication date: Available online 25 April 2018Source: Hormigón y AceroAuthor(s): Hans W. Reinhardt, Hasan Özkan, Oliver Mielich Alkali-Silica Reaction (ASR) is one of the most severe damage reactions of concrete. There are at least two different mechanisms of ASR: The most common is the rapid disruption of siliceous aggregates at the surface of the grain, which occurs in flint and opal sandstone, for example: The others are called slow reacting aggregates, and refer, for example, to cracking of the grain of greywacke and quartz porphyry. Both reactions are due to the dissolving of SiO2 by alkalis. The present paper reports on tests on slow reacting aggregates.While most studies in the literature concentrate on the expansion behavior of the aggregates, in this article focus is centered on the mechanical properties, such as strength and creep. The aggregates used are greywacke, quartz porphyry, and crushed sediments from the Upper Rhine Valley.ResumenLa reacción álcali-sílice (ASR) es uno de los deterioros más importantes que se produce en el hormigón. Existen principalmente 2 mecanismos de ASR: El más común es la irrupción rápida de los áridos silíceos en la superficie del grano que por ejemplo sucede con el pedernal y la arenisca opal, mientras que los otros mecanismos son los de áridos de reacción lenta y, por ejemplo se refieren al agrietamiento del grano de greywacke y pórfido de cuarzo. Ambas reacciones se deben a la disolución del SiO2 por los álcalis. El presente trabajo versa sobre ensayos en áridos de reacción lenta.Mientras que la mayoría de las investigaciones en la literatura se concentran en el comportamiento de expansión de los áridos, nosotros nos centramos en las propiedades mecánicas tales como resistencia mecánica y fluencia. Los áridos utilizados son greywacke, pórfido de cuarzo y sedimentos triturados del Valle Superior del Rin.
       
  • Analysis of the early-age cracking in concrete made from rapid hardening
           cement
    • Abstract: Publication date: Available online 14 April 2018Source: Hormigón y AceroAuthor(s): Héctor Cifuentes, Bhushan L. Karihaloo This paper investigates the use of concrete containing ultra-rapid hardening cement for rapid repairs in confined spaces where the repaired element has to sustain dynamic loading within a short time after repair. The study focuses on the early-age strength development and structural integrity of the repaired element. The study is divided in two parts. The first part is devoted to the compressive and split cylinder strengths, and to the temperature rise under adiabatic conditions in the concrete repair material from early-age (1 h after casting) to 7 days of age. The second part of the study focuses on the finite element thermal and thermo-mechanical analysis of three repair options of a damaged concrete element in a confined space using simplified pseudo-static loading characteristics for the repaired element.ResumenEn este artículo se analiza la utilización de un hormigón fabricado mediante cemento de endurecimiento ultra-rápido para la reparación urgente en espacios confinados, donde los elementos reparados son sometidos a cargas dinámicas poco tiempo después de su reparación. La investigación se centra principalmente en el estudio del desarrollo de la resistencia del material a edades tempranas, así como de la integridad estructural del elemento reparado. El trabajo se ha dividido en 2 partes. En la primera parte se analiza la resistencia a compresión, la resistencia a tracción indirecta y el aumento de temperatura bajo condiciones adiabáticas del hormigón de reparación desde una edad muy temprana (1 h después del hormigonado) hasta una edad de 7 días. En la segunda parte de la investigación se realiza un análisis térmico y termo-mecánico mediante elementos finitos de 3 opciones de reparación de un elemento de hormigón dañado y confinado en un espacio, utilizando cargas seudoestáticas simplificadas para el estudio del elemento reparado.
       
  • From experiments to design: A probabilistic definition of design
           formulations from empirical and semi-empirical resistance models
    • Abstract: Publication date: Available online 24 March 2018Source: Hormigón y AceroAuthor(s): Giuseppe Mancini, Vincenzo Ilario Carbone, Diego Gino The definition of design equations from empirical or semi-empirical resistance models is a matter of relevance for structural engineering. In common practice, the limit states design approach predicts the direct application of partial safety factors to the resistance of the materials in order to obtain design formulations coherent with a prescribed level of reliability. As empirical or semi-empirical models are calibrated, adjusting empirical coefficients to fit a set of experimental data, the application of partial safety factors to material properties alone is not able to provide a correct estimation of structural reliability.In the present paper, a methodology based on the Monte Carlo method for probabilistic calibration of empirical and semi-empirical resistance models is proposed. Its application related to the probabilistic calibration of the semi-empirical model proposed by fib Model Code 2010 for the estimation of laps and anchorages tensile strength in reinforced concrete structures is reported and discussed.ResumenLa definición de las ecuaciones de proyecto a partir de modelos resistencia empírica o semiempírica es una cuestión de importancia para la ingeniería estructural. En la práctica común, el proyecto segun los estados límites prevee la aplicación directa de factores de seguridad parciales a la resistencia de los materiales, con el fin de obtener formulaciones de diseño coherentes con un nivel de fiabilidad prescrito. Como los modelos empíricos o semiempíricos se calibran ajustando los coeficientes empíricos para adaptarse a un conjunto de datos experimentales, la aplicación de factores de seguridad parciales a las propiedades de los materiales por sí sola no permite una estimación correcta de la fiabilidad estructural.En el presente trabajo se propone una metodología basada en el método de Monte Carlo para la calibración probabilística de modelos de resistencia empírica y semiempírica. Su aplicación relacionada con la calibración probabilística del modelo semiempírico para la estimación de la resistencia a tracción de superposiciones y anclajes en estructuras de hormigón armado es reportada y comentada.
       
  • Carros de encofrado para la ejecución del arco del puente sobre el
           río Almonte
    • Abstract: Publication date: Available online 10 March 2018Source: Hormigón y AceroAuthor(s): Tomasz Smich, Enrique Bordó BujalanceResumenDescripción de los carros de encofrado para la ejecución del arco del puente sobre el río Almonte. Diseño, cinemática y maniobras especiales. Description of the travellers formwork used for construction of the arch of the river Almonte bridge. Design, kinematics and special manoeuvres.
       
  • Algunas reflexiones sobre la instalación de pretiles en la
           rehabilitación de puentes
    • Abstract: Publication date: Available online 7 March 2018Source: Hormigón y AceroAuthor(s): Jesús María Rodríguez Romero, Eduardo Díaz-Pavón Cuaresma, Elena Díaz Heredia, José Ramón Arroyo Arroyo, Miguel Ángel Liébana RamosResumenLa colocación de nuevos sistemas de contención en tableros de puentes existentes exige un análisis detallado y una reflexión suficiente que permita proyectar y ejecutar una solución adecuada que, de acuerdo con nuestra experiencia en los estudios de patología realizados, no siempre se consigue.En el presente artículo hemos pretendido evidenciar la complejidad que puede suponer a nuestro juicio abordar satisfactoriamente la rehabilitación del sistema de contención de un puente sustituyéndolo por una solución válida a la luz de los conceptos y criterios actuales, que puede desembocar en muchos casos en una intervención no menor, justificando la necesidad de reforzar o de ampliar el tablero y cuestionar en algunos casos determinadas soluciones de implantación observadas. The placement of new systems of containment on existing bridge's boards requires a detailed analysis and a sufficient thinking to design and execute an adequate solution that, based on our experience in pathology's studies, is not achieved in many cases.In the present article we have intended to demonstrate the complexity, in our opinion, of the rehabilitation of the containment system of a bridge, replacing it by a valid solution taking into account the current design concepts and criteria, that can lead in many cases to develop an important intervention and also to justify the need to strengthen or expand the board in many cases and even to question certain solutions observed.
       
  • Seismic isolation of structures. Part I: Concept, review and a recent
           development
    • Abstract: Publication date: Available online 13 February 2018Source: Hormigón y AceroAuthor(s): Mohammed Ismail This paper is the first of two companion papers on seismic isolation of structures. Those two papers present the topic since its fundamental concepts; passing through its development history and comparisons of developed isolation systems over time; up to addressing one of the most recent isolation devices, besides a detailed case study of its implementation under severe near-fault earthquakes considering closely-spaced asymmetric multistory structures. The present paper, Part I, introduces briefly the concept of seismic isolation and its development history. Then presents for an application using a recently proposed seismic isolation systems named Roll-in-Cage (RNC) isolator. The objective of the second companion paper, Part II, is to minimize twist of isolated asymmetric structures, together with their torsional pounding with adjacent structures, considering insufficient seismic gaps and strong near-fault ground motions, by means of the RNC isolator.ResumenEste artículo es el primero de dos artículos complementarios sobre aislamiento sísmico de estructuras, que presentan el tema desde sus conceptos básicos, pasando por la historia de su desarrollo y las comparaciones de sistemas de aislamiento desarrollados a lo largo del tiempo, hasta abordar uno de los dispositivos de aislamiento más recientes, además de un caso práctico detallado de su implementación en condiciones de terremotos intensos cerca de la falla con la valoración de estructuras asimétricas de varios pisos con poco espacio entre sí. El presente artículo, la parte I, presenta brevemente el concepto de aislamiento sísmico y la historia de su desarrollo. Luego se presenta una aplicación que utiliza un sistema de aislamiento sísmico propuesto recientemente, denominado aislador roll-in-cage (RNC). El objetivo del segundo artículo complementario, la parte II, es reducir la torsión de estructuras asimétricas aisladas, así como el golpeteo torsional con estructuras adyacentes, considerando los casos de espacio insuficiente entre las estructuras y de fuertes movimiemtos sísmicos por proximidad a una falla, por medio del aislador RNC.
       
  • Seismic isolation of structures, Part II: A case study using the RNC
           isolator
    • Abstract: Publication date: Available online 13 February 2018Source: Hormigón y AceroAuthor(s): Mohammed Ismail The present paper is the second of two companion papers. The objective of this paper is to minimize twist of isolated asymmetric structures, together with their torsional pounding with adjacent structures, considering insufficient seismic gaps and strong near-fault ground motions. Concisely, the present study attempts to provide efficient seismic isolation under the above challenging conditions. The used isolation system is referred to Roll-in-Cage (RNC) isolator. Among the features of the RNC isolator are two characteristics that help achieving the objectives of the paper. The first is the independency of its bearing and pre-yield stiffness mechanisms. Such independency allows for accurate tuning of the isolators pre-yield stiffness to shift their center of rigidity, at the isolation level, to coincide with the asymmetric superstructure's center of mass above that level. This allows for minimizing the structural twist of an isolated asymmetric structure. The second feature is the inherent buffer mechanism of the RNC isolator, which draws down any possible seismic pounding of the isolated superstructure, with adjacent structures, to occur only within the isolation bearing itself. This leads to seismic pounding-free superstructure under limited seismic gaps. The obtained results show that utilizing the RNC isolator this way is able to minimize, or even eliminate, the out-of-plan displacement responses of asymmetric isolated structures under severe near-fault earthquakes, and consequently, minimizes a major cause of structural damage due to structural torsional pounding with closely spaced adjacent structures under such destructive ground motions.ResumenEste artículo es el segundo de dos artículos complementarios. Su objetivo es reducir la torsión de estructuras asimétricas aisladas, así como el golpeteo torsional con estructuras adyacentes, considerando los casos de espacio insuficiente entre las estructuras y de fuertes movimiemtos sísmicos por proximidad a una falla, por medio del aislador roll-in-cage (RNC). De forma concisa, este estudio intenta proporcionar un aislamiento sísmico eficiente con las condiciones difíciles mencionadas anteriormente. El sistema de aislamiento utilizado hace referencia al aislador RNC. Entre las características del aislador RNC hay dos que ayudan a lograr los objetivos del artículo. La primera es la independencia de sus mecanismos de rigidez de rodamiento y de predicción de rendimiento. Esta independencia permite un ajuste preciso de la rigidez de predicción de rendimiento de los aisladores para desplazar su centro de rigidez, respecto al nivel de aislamiento, para que coincida con el centro de masa de la superestructura asimétrica por encima de ese nivel. Ello permite reducir el giro estructural de una estructura asimétrica aislada. La segunda característica es el mecanismo de amortiguación inherente del aislador RNC, que elimina cualquier posible golpeteo sísmico de la superestructura aislada, con estructuras adyacentes, para que ocurra solo dentro del propio rodamiento de aislamiento. Ello produce una superestructura sin golpeteo sísmico en condiciones de insuficiente espacio para movimiento debido al sismo. Los resultados obtenidos muestran que la utilización del aislador RNC de esta manera puede reducir o, incluso, eliminar las respuestas de desplazamiento fuera del plano de las estructuras asimétricas aisladas en terremotos intensos cerca de la falla y, en consecuencia, reduce una causa importante de daño estructural debido al golpeteo torsional estructural con estructuras adyacentes con poco espacio entre sí con movimientos de tierra tan destructivos.
       
  • New opportunities for the conceptual design of material-efficient
           antifunicular structures
    • Abstract: Publication date: January–April 2018Source: Hormigón y Acero, Volume 69, Issue 284Author(s): Leonardo Todisco, Hugo Corres Non-structural design criteria (e.g., usability, architectural needs, esthetics) may prohibit the selection of purely funicular or anti-funicular shapes. In response to this issue, this paper illustrates the possibility of achieving an axial-only behavior, even if the geometry departs from the ideally bending-free shape. This is achieved by adding forces through an external post-tensioning system, with a layout defined through graphic statics. The paper briefly illustrates examples of this approach and its implementation within a design-driven software where structural performance and geometric variation are embedded within an interactive and parametric working environment.ResumenLos criterios de diseño no estructurales (p. ej., funcionalidad, necesidades arquitectónicas o estética) pueden prohibir la selección de formas puramente funiculares o antifuniculares. En respuesta a este problema, este artículo ilustra la posibilidad de lograr un comportamiento axial solamente, aunque la geometría se aparte de la forma idealmente sin flexión. Esto se consigue mediante la adición de fuerzas a través de un sistema de postensado externo, con un diseño definido a través de estática gráfica. El artículo ilustra brevemente ejemplos de este enfoque y su implementación dentro de un software impulsado por el diseño, donde el rendimiento estructural y la variación geométrica están incrustados dentro de un entorno de trabajo interactivo y paramétrico.
       
  • Hormigón autocompactante con fibras para premoldeados
    • Abstract: Publication date: January–April 2018Source: Hormigón y Acero, Volume 69, Issue 284Author(s): Gemma Rodríguez de Sensale, Luis Segura-Castillo, Iliana Rodríguez Viacava, Rosana Rolfi Netto, Darío Miguez Passada, María Esther Fernández IglesiasResumenComo referencia se tomó un hormigón autocompactante (HAC) usual en premoldeados. Las variables analizadas fueron el tipo de fibras y su cuantía. Se estudiaron propiedades de los hormigones en estado fresco y endurecido. La incorporación de fibras en estado fresco influye significativamente en la reología; en estado endurecido mejora la resistencia mecánica en relación al HAC sin fibras. En relación a la permeabilidad al aire y la resistencia a penetración de cloruros, los resultados obtenidos no difieren significativamente entre sí. A self-compacting concrete (SCC), which is usual in local precast, was used as reference. The variables analysed were the type of fibres and their amount. Properties of concretes in fresh and hardened state were studied. The use of fibres, compared to the SCC without fibres, significantly influences the rheology in the fresh state and improves mechanical resistance in the hardened state. As regards the air permeability and the resistance to chloride penetration, the results obtained do not differ significantly between the two states.
       
  • Empuje con doble curvatura, planta y alzado, en viaducto de línea de alta
           velocidad Orense-Monforte-Lugo, Variante de San Julián
    • Abstract: Publication date: January–April 2018Source: Hormigón y Acero, Volume 69, Issue 284Author(s): Carlos J. Bajo Pavía, Marta Pérez Escacho, Juan Sevillano GachoResumenEl proceso constructivo mediante empuje de tablero para alineación curva en planta y una rasante mixta, ha requerido la adaptación del método tradicional de empuje hacia un método híbrido que, respetando las ventajas inherentes al sistema constructivo, ha permitido trabajar en condiciones geométricas no habituales. El establecimiento del empuje en dos fases: empuje sobre trayectoria transitoria afectada por la propia flexibilidad vertical del tablero, y la posterior rectificación de cota a nivel de apoyos mediante procedimiento secuencial de descenso controlado, ha permitido dar viabilidad a este método con un resultado global altamente competitivo. The construction sequence by means of incremental-launching for curved plan alignment and a straight and convex parabolic elevation, has required the adaptation of the traditional method of launching towards a hybrid method that, preserving the inherent advantages of the primary construction system, has allowed to work with these unusual geometrical conditions. The establishment of the launching procedure in two phases: launching on a transitional trajectory affected by the vertical flexibility of the deck, and the further rectification of the deck elevation by a sequential controlled support descent, has provided viability for this method with a highly competitive result.
       
  • Dificultades en el planteamiento del refuerzo de pilares de hormigón
           armado
    • Abstract: Publication date: January–April 2018Source: Hormigón y Acero, Volume 69, Issue 284Author(s): Enrique Calderón Bello, Eduardo Díaz-Pavón CuaresmaResumenLa poca regulación existente para el refuerzo de estructuras hace que hasta en los casos más sencillos de edificación sea enormemente complicado tener un criterio de actuación. En la revisión de proyectos de rehabilitación hemos detectado que el denominador común en muchos refuerzos de pilares fue la ausencia de la justificación del planteamiento del refuerzo o de cómo se transmitían las cargas de la estructura existente al mismo. Sirvan como ejemplo las numerosas intervenciones llevadas a cabo tras el terremoto de Lorca de 2011, donde muchos pilares resultaron gravemente dañados. Las soluciones de refuerzo fueron diversas, aunque compartían en la mayoría de los casos la precipitación en su ejecución y la ausencia de valoración de su efectividad.Se expone, mediante un ejemplo de un pilar dañado en una planta, la problemática del diseño del refuerzo y cómo este puede resultar de mayor alcance del esperado. The lack of regulations with regards to strengthening reinforced structures prevents the adoption of a standardised approach to even the simplest building structures. Following the analysis of refurbishment projects, it has been concluded that the common denominator in many reinforced columns was the lack of justification of the calculation of the column reinforcement, or even the load transmission between the existing structure and this new reinforcement. Of special concern were the numerous interventions carried out following the earthquake that took place in Lorca in 2011, where many columns had been severely damaged. Although the strengthening solutions implemented in Lorca were diverse, they all followed a similar pattern presenting design solutions that were rushed and lacked a proper evaluation of their effectiveness.This article focuses on an example of a damaged column on a random building floor and the associated challenge related to the design of a strengthening solution and how this may eventually result in a significantly larger scope than initially envisaged.
       
  • Detección de daño en vigas de hormigón pretensado mediante el método
           de curvatura de la elástica
    • Abstract: Publication date: January–April 2018Source: Hormigón y Acero, Volume 69, Issue 284Author(s): Germán D. Ercolani, Néstor F. Ortega, Daniel H. FelixResumenEn el momento de inspeccionar y garantizar la seguridad de una estructura existente es importante contar con técnicas adecuadas que permitan detectar la presencia de daño en la misma. En el presente trabajo se estudia el método de curvatura de la elástica, aplicado específicamente a la detección de fisuras por flexión en vigas de hormigón pretensado, tipología ampliamente utilizada en puentes carreteros. Los estudios se realizaron sobre un conjunto de modelos tridimensionales, mediante el método de los elementos finitos. Se realizaron distintos análisis de sensibilidad que permitieron determinar con éxito los distintos parámetros requeridos por el método de curvatura de la elástica en el momento de ser llevado a la práctica. At the time of inspecting and ensuring the safety of an existing structure, it is important to have proper techniques to detect the presence of damage in that structure. In this work, a study is made of the method of curvature of the elasticity, applied specifically to the detection of bending cracks in pre-stressed concrete beams, a typology widely used in highway bridges. The studies were performed on a set of three-dimensional models, using the finite element method. Different sensitivity analyses were carried out to determine, successfully, the required parameters for the implementation of the method of curvature of the elasticity in practice.
       
  • El Elogio del horizonte de Chillida, un encuentro entre ciencia y
           arte
    • Abstract: Publication date: January–April 2018Source: Hormigón y Acero, Volume 69, Issue 284Author(s): Deborah García Bello, Moisés CanleResumenA través de la investigación de los aspectos ingenieriles del Elogio del horizonte de Chillida tales como materiales, ejecución de la obra, localización, forma y escala, se pretende demostrar la inequívoca relación entre la ciencia y el arte. Se describen de forma divulgativa los procesos fisicoquímicos implicados en la dosificación, encofrado, fraguado, curado, etc. del hormigón empleado, así como la interpretación artística de esta elección. Se constata el vínculo entre formas de conocimiento, ya que la obra no podría haber sido ejecutada, pensada, ni interpretada, de no disponerse de conocimientos y herramientas propias de la ingeniería. By studying the engineering aspects of Chillida's ‘Elogio del horizonte’ (Praise of the Horizon), such as the materials, work execution, location, shape and scale, an attempt is made to show the unambiguous relationship between science and art. A description is presented on the physicochemical processes involved in the dosage, formwork, hardening, curing, etc. of the concrete, as well as the artistic interpretation of the author's choice. We show the link between different forms of knowledge, as the work could not be executed, nor be interpreted, without the necessary body of knowledge from engineering.
       
  • Diseño y construcción del puente Frank Gehry. Primer acceso a la nueva
           isla de Zorrotzaurre en Bilbao
    • Abstract: Publication date: January–April 2018Source: Hormigón y Acero, Volume 69, Issue 284Author(s): Pablo Alfonso Domínguez, Guillermo Capellán Miguel, Héctor Beade Pereda, Marianela García Pérez, Alejandro Godoy Ansótegui, Jorge López Tamames, Víctor José García MartínResumenNombrado Frank Gehry como homenaje del Ayuntamiento de Bilbao, este puente materializa la primera conexión de la futura isla de Zorrotzaurre con el resto de la trama urbana, salvando el curso de agua mediante un vano principal de 76,9 m y una anchura media de 28 m. Es un puente de especial interés por su sistema estructural, que combina un esquema de viga Fink invertida con una viga de tres vanos con canto variable, sin precedentes en puentes para tráfico rodado.La construcción del puente se realiza sobre tierra firme, contando durante la puesta en carga con instrumentación en tiempo real de todos los elementos con acceso remoto por Internet. Named after Frank Gehry as homage by Bilbao's City Council, the bridge will materialize the first connection of this island with the rest of the urban fabric. It saves the watercourse with a main span of 76.9 m and an average width of 28 m, using an innovative design concept which combines two structural schemes: an inverted Fink Truss and a three span variable height beam. It is a bridge of major interest due to the structural type used, without any precedent in road bridges.The bridge construction is carried out on land, counting on real time monitoring of all structural elements during bridge cables tensioning, with Internet remote access.
       
 
 
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