JournalTOCs

International Journal of Masonry Research and Innovation
Number of Followers: 0

Hybrid journal (It can contain Open Access articles)
ISSN (Print) 2056-9459 - ISSN (Online) 2056-9467
Published by Inderscience Publishers

[439 journals]

Fully analytical model for the analysis of externally bonded composites
applied to brittle supports: sensitivity analysis
- Free pre-print version: Loading...
  Rate this result: What is this?
  
  Please help us test our new pre-print finding feature by giving the pre-print link a rating.
  A 5 star rating indicates the linked pre-print has the exact same content as the published article.
  
  Authors: Elisa Bertolesi, Gabriele Milani, Ernesto Grande, Roberto Capozucca
  Pages: 355 - 372
  Abstract: Several analytical models have been proposed reducing the debonding mechanism to a bond loss event occurring in inelastic interfaces, whose mechanical properties need to be adjusted based on available experimental data. The analytical model developed by the authors and briefly recalled in this work, considers elastic FRP bonded to brittle supports by means of inelastic interfaces. In detail, the inelastic interface is described by an initial linear elastic phase (phase 1) and a decreasing exponential softening law (phase 2). This article demonstrates the reliability of the proposed model to study the adhesion performance and failure modes of FRPs applied on different brittle supports. The model is widely benchmarked using the results obtained from two laboratory investigations on flat concrete and masonry prisms reinforced with FRP composite materials and an extensive sensitivity analysis performed by varying different parameters, namely: bond length, interfacial bonding law and FRP mechanical properties. Each parameter is discussed with respect to: 1) the obtained global force-slip curves; 2) force increase; 3) post-peak response.
  Keywords: debonding mechanisms; FRP composites; closed form solution; concrete; masonry
  Citation: International Journal of Masonry Research and Innovation, Vol. 8, No. 4/5 (2023) pp. 355 - 372
  PubDate: 2023-07-04T23:20:50-05:00
  DOI: 10.1504/IJMRI.2023.131837
  Issue No: Vol. 8, No. 4/5 (2023)
Historical masonry wallets with plaster slabs strengthened by CrFRM and
GFRP
- Free pre-print version: Loading...
  Rate this result: What is this?
  
  Please help us test our new pre-print finding feature by giving the pre-print link a rating.
  A 5 star rating indicates the linked pre-print has the exact same content as the published article.
  
  Authors: Roberto Capozucca, Erica Magagnini
  Pages: 373 - 396
  Abstract: Knowledge concerning the response of historic masonry to cyclic shear loading is fundamental for defining the behaviour of existing masonry buildings under seismic actions. Walls under cycle shear are known to be diagonally cracked due to low tensile strength of masonry. Many mechanical and geometric parameters influence the shear response of brickwork walls. One aspect too often underestimated is the presence of plaster on the external surface of walls. In this paper, experimental response and failure mechanisms of historic brickwork wallets, without plaster and with lime plaster reinforced by fibres, have been investigated under tensile tests by diagonal compression. The wallets have been strengthened with mortar reinforced by chrome fibres (CrFRM) and with glass fibre reinforced polymer (GFRP) net. The experiments were carried out previously on materials and triplets to define the strength of unreinforced masonry under compression and shear. Experimental results are shown obtaining shear criteria useful in practice.
  Keywords: historic masonry; plaster slab; chrome fibres; CrFRM; glass fibre reinforced polymer; GFRP-net; diagonal compression tests
  Citation: International Journal of Masonry Research and Innovation, Vol. 8, No. 4/5 (2023) pp. 373 - 396
  PubDate: 2023-07-04T23:20:50-05:00
  DOI: 10.1504/IJMRI.2023.131818
  Issue No: Vol. 8, No. 4/5 (2023)
Different choices of steel and/or composite reinforcements for
different types of masonry vaults
- Free pre-print version: Loading...
  Rate this result: What is this?
  
  Please help us test our new pre-print finding feature by giving the pre-print link a rating.
  A 5 star rating indicates the linked pre-print has the exact same content as the published article.
  
  Authors: Roberto Capozucca, Erica Magagnini
  Pages: 397 - 427
  Abstract: When designing reinforcements for masonry vaults, it is important to consider the structural behaviours of these constructive elements. They depend on two important factors: the form of each vault and the supporting elements. The second factor is often the most important; it is important to consider the different structural typologies of buildings in which vaults are built. Starting from the same philosophy and methodology of intervention, different situations entail very different solutions when designing the seismic retrofitting of vaults. The interventions designed for two very different types of vaults and boundary conditions are described. The first is the interventions design for the Rosati Palace's pavilion vaults (L'Aquila, Italy), where it was possible to eliminate nearly all relative movements across the vaults' springing. The second is the intervention designed for San Francesco Basilica's cross vaults in Assisi (Italy), where it was not possible to eliminate relative movements across the vaults' springing.
  Keywords: pavilion vaults; cross vaults; seismic retrofitting; steel reinforcements; composite reinforcements
  Citation: International Journal of Masonry Research and Innovation, Vol. 8, No. 4/5 (2023) pp. 397 - 427
  PubDate: 2023-07-04T23:20:50-05:00
  DOI: 10.1504/IJMRI.2023.131913
  Issue No: Vol. 8, No. 4/5 (2023)
Bond of CFRP/GFRP strips in the strengthening of walls
- Free pre-print version: Loading...
  Rate this result: What is this?
  
  Please help us test our new pre-print finding feature by giving the pre-print link a rating.
  A 5 star rating indicates the linked pre-print has the exact same content as the published article.
  
  Authors: Roberto Capozucca, Erica Magagnini, Giuseppe Pace
  Pages: 428 - 448
  Abstract: In recent years, the research about strengthening techniques designed to prevent collapse and severe damages under seismic actions in masonry structures using composite materials increased considerably. Although the experimental and theoretical results are numerous, the central aspect of delamination of the strengthening with external bonded (EB) FRP strips on masonry surface needs a deep analysis. Experimental results may assess the availability of technique for rehabilitation of damaged masonry buildings subjected to seismic action. This paper deals with the experimental results on the bond of carbon-FRP and glass-FRP strips considering pull-out tests and theoretical model useful to define the shear-slip laws. Further, the behaviour of brickwork wall models strengthened with CFRP/GFRP strips subjected to combined compression shear loading is analysed. The results are discussed, focusing the attention on the comparison of fracture energy developed during the different tests.
  Keywords: brickwork wall; external bonded strengthening; G/CFRP; pull-push tests; cyclic shear tests; delamination
  Citation: International Journal of Masonry Research and Innovation, Vol. 8, No. 4/5 (2023) pp. 428 - 448
  PubDate: 2023-07-04T23:20:50-05:00
  DOI: 10.1504/IJMRI.2023.131822
  Issue No: Vol. 8, No. 4/5 (2023)
Application of digital image correlation to compression tests on tuff
masonry panels strengthened by textile reinforced mortar
- Free pre-print version: Loading...
  Rate this result: What is this?
  
  Please help us test our new pre-print finding feature by giving the pre-print link a rating.
  A 5 star rating indicates the linked pre-print has the exact same content as the published article.
  
  Authors: Gianluca Maracchini, Gianluca Chiappini, Jacopo Donnini, Enrico Quagliarini, Valeria Corinaldesi, Stefano Lenci
  Pages: 449 - 462
  Abstract: Digital image correlation (DIC) is a contactless full-field optical technique for measuring displacements that can be potentially used in place of more common linear variable differential transformers (LVDTs) to avoid instrumentation damage during destructive tests. However, despite being already adopted in several fields, its potentialities in testing full-scale masonry walls strengthened with textile reinforcing mortar (TRM) have not been fully investigated yet. In this paper, the results obtained by applying a stereo-DIC technique to compression tests of unstrengthened and TRM-strengthened tuff masonry walls (1.0 × 1.2 × 0.25 m<SUP align="right">3</SUP>) are reported. Results showed that the presence of helical steel bars used to connect the two TRM layers caused crack localisation to the masonry wall, leading to a reduction of compression strength. Compared with the results obtained with LVDTs, the DIC technique was able to accurately monitor tridimensional displacements and cracking pattern evolution. The potentialities and limits of this technique are finally highlighted.
  Keywords: digital image correlation; DIC; textile reinforcing mortar; TRM; tuff masonry; compression test; elastic modulus
  Citation: International Journal of Masonry Research and Innovation, Vol. 8, No. 4/5 (2023) pp. 449 - 462
  PubDate: 2023-07-04T23:20:50-05:00
  DOI: 10.1504/IJMRI.2023.131821
  Issue No: Vol. 8, No. 4/5 (2023)
ConFiRMa: calibration of a numerical model for fibre-reinforced mortar
analysis with OOFEM code
- Free pre-print version: Loading...
  Rate this result: What is this?
  
  Please help us test our new pre-print finding feature by giving the pre-print link a rating.
  A 5 star rating indicates the linked pre-print has the exact same content as the published article.
  
  Authors: Ingrid Boem, BoÅ™ek PatzÃ¡k, Alena KohoutkovÃ¡
  Pages: 463 - 478
  Abstract: The 'conFiRMa' project is aimed at calibrating a numerical model for masonry buildings strengthened with fibre reinforced mortar (FRM). The main purpose is to develop a multi-level approach, starting with the detailed modelling of components, followed by an optimisation procedure to get a computationally efficient intermediate level model for the calibration of the lumped plasticity model for global analysis. In this paper, the first results concerning the detailed modelling level are presented. It focuses on the interaction between the mortar matrix and the embedded composite reinforcement mesh. The mortar is modelled through solid elements, the yarns of the fibre-based mesh with truss elements and the mortar-mesh interaction by means of interface elements. Nonlinear static analyses are performed, considering the materials and interfaces nonlinearity. The results of previous experimental tests concerning FRM mechanical characterisation are considered to calibrate (pull-off tests) and validate (tensile and shear bond tests) the numerical model.
  Keywords: seismic vulnerability; masonry strengthening; structural refurbishment; composites; fibre reinforced mortar; FRM; composite reinforced mortar; CRM; numerical modelling; OOFEM
  Citation: International Journal of Masonry Research and Innovation, Vol. 8, No. 4/5 (2023) pp. 463 - 478
  PubDate: 2023-07-04T23:20:50-05:00
  DOI: 10.1504/IJMRI.2023.131840
  Issue No: Vol. 8, No. 4/5 (2023)
Effect of type of masonry units on the mechanical properties of masonry
panel walls
- Free pre-print version: Loading...
  Rate this result: What is this?
  
  Please help us test our new pre-print finding feature by giving the pre-print link a rating.
  A 5 star rating indicates the linked pre-print has the exact same content as the published article.
  
  Authors: Ali Abdelkhalek, Mohammed A. Sakr, Ayman A. Seleemah, Tarek M. Khalifa
  Pages: 479 - 508
  Abstract: Recently, cellular lightweight concrete (CLC) masonry units have been emerging as a substitute for burnt red clay (RCL) units that are commonly used in construction. In this study, an experimental program was conducted according to ASTM and British standards to compare the essential in-plane mechanical properties of CLC and RCL masonry units and masonry panels. These mechanical properties represent the initial inputs for numerical modelling used in analysing the behaviour of different elements (i.e., constructed from CLC units). This study showed that RCL masonry units and masonry panel walls are stiffer than CLC units, but they approximately have the same lateral load resistance. While the CLC masonry units are more ductile than RCL ones and have higher energy-absorbing capacity. Accordingly, they could be a solution to enhance the flexibility and ductility of buildings. Moreover, it is a lightweight brick.
  Keywords: cellular lightweight concrete; mechanical properties; red clay masonry units; masonry structures; compressive strength
  Citation: International Journal of Masonry Research and Innovation, Vol. 8, No. 4/5 (2023) pp. 479 - 508
  PubDate: 2023-07-04T23:20:50-05:00
  DOI: 10.1504/IJMRI.2023.131836
  Issue No: Vol. 8, No. 4/5 (2023)
Dynamic identification and numerical model updating of an old bell-tower
in Marche Region (Italy)
- Free pre-print version: Loading...
  Rate this result: What is this?
  
  Please help us test our new pre-print finding feature by giving the pre-print link a rating.
  A 5 star rating indicates the linked pre-print has the exact same content as the published article.
  
  Authors: Ersilia Giordano, Angela Ferrante, Georgios P. Salachoris, Mattia Schiavoni, Francesco Clementi, Stefano Lenci
  Pages: 509 - 519
  Abstract: In this paper, the dynamic characterisation of the civic bell-tower of Rotella (a small village in the Marche Region, Central Italy) is presented. The tower after being monitored, using four tri-axial piezo-electric accelerometers, and obtaining its dynamic characteristics, was modelled through a finite element software. The difference between measured and real values has been smoothed out by acting on all unknown parameters such as Young's moduli, thus obtaining a model with frequency differences, compared to reality, less than 5% and the MAC values between the modal shapes close to the unit.
  Keywords: dynamic identification; numerical models; masonry towers; monumental buildings; structural health monitoring; finite element model; FEM; model updating; modal assurance criteria; Marche Region; Italy
  Citation: International Journal of Masonry Research and Innovation, Vol. 8, No. 4/5 (2023) pp. 509 - 519
  PubDate: 2023-07-04T23:20:50-05:00
  DOI: 10.1504/IJMRI.2023.131838
  Issue No: Vol. 8, No. 4/5 (2023)
Unveiling the complexity of twin church bells dynamics using ambient
vibration tests
- Free pre-print version: Loading...
  Rate this result: What is this?
  
  Please help us test our new pre-print finding feature by giving the pre-print link a rating.
  A 5 star rating indicates the linked pre-print has the exact same content as the published article.
  
  Authors: Angela Ferrante, Ersilia Giordano, Gianluca Standoli, Francesca Bianconi, Francesco Clementi, Stefano Lenci
  Pages: 520 - 530
  Abstract: On the Italian territory, many monumental structures need to be preserved. Given their great historical and architectural value, it is essential to use minimally invasive, but effective, techniques able to evaluate their current structural capabilities and monitor their structural health. The technique that currently appears most appropriate is the ambient vibration monitoring, which, through the analysis of recorded accelerometric time-histories in operating conditions, returns the current dynamic properties of the structure. This work shows the results of the short-term monitoring carried out on the two towers of the San Francesco Church, located in the city of Ascoli Piceno. Modal identification allowed obtaining its frequencies, modal shapes, and damping. With these data, the finite element model of the complex was calibrated, acting on the elastic parameters of the masonry, making numerical modal shapes and frequencies match with the experimental results.
  Keywords: dynamic identification; numerical models; NM; masonry churches; masonry towers; ambient vibration tests; monumental structures; structural health monitoring; SHM; finite element model; model updating
  Citation: International Journal of Masonry Research and Innovation, Vol. 8, No. 4/5 (2023) pp. 520 - 530
  PubDate: 2023-07-04T23:20:50-05:00
  DOI: 10.1504/IJMRI.2023.131839
  Issue No: Vol. 8, No. 4/5 (2023)