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Journal Cover American Journal of Civil Engineering and Architecture
  [31 followers]  Follow
    
  This is an Open Access Journal Open Access journal
   ISSN (Print) 2328-398X - ISSN (Online) 2328-3998
   Published by Science and Education Publishing Homepage  [72 journals]
  • Sustainability Requirements of Concrete Structures

    • Authors: Mohamed O. Rageh; Hossam Hosny, Ahmed Abdel-Rehem
      Pages: 174 - 186
      Abstract: The objective of this research paper is to discuss the main requirements which may affect the sustainability of concrete structures and develop the relative weights of these requirements. A questionnaire survey was conducted among construction experts, such as college staff, contractors and construction engineers. The survey was conducted to identify the relative weights of the concrete sustainability requirements. After reviewing literature, fifty nine factors which affect the concrete sustainability were prepared and divided them into 12 categories. A pilot study was conducted by 19% of sample size to enhance the questionnaire design. The pilot study was filled out by 10 college professors and 9 engineers with experience more than 10 years. This study helped us to modify the requirements which were directly connected with the concrete sustainability. Researchers found that the most important factors were related to “Aggregate” category. Aggregate category has the weight of 17.64% and waste category has the weight of 13.04%. These two categories have about 30% of concrete sustainability weight. The Green Pyramid Rating System (GPRS) was used in the present research to know what could be added.
      PubDate: 2017-10-24
      DOI: 10.12691/ajcea-5-5-1
      Issue No: Vol. 5, No. 5 (2017)
       
  • 2D and 3D Numerical Simulation of Load-Settlement Behaviour of Axially
           Loaded Pile Foundations

    • Authors: Gowthaman S; Nasvi MCM
      Pages: 187 - 195
      Abstract: Reliable prediction of settlement behaviour of axially loaded piles is one of the major concerns in geotechnical engineering. Therefore, this paper focuses on the finite element solutions of load-settlement behaviour of a single pile and pile group using PLAXIS numerical package. Three different types of analysis were incorporated: a linear elastic analysis, a complete nonlinear analysis and a combined analysis. The pile case history with settlement measurements made during field pile load test was considered to validate the single pile load-settlement simulation, and the same load test result was extended to simulate the load-settlement behaviour of pile group using RATZ analytical approach. The single pile analysis results suggest that realistic load-settlement predictions can be drawn by considering complete soil as Mohr-Coulomb model at lower working loads, and incorporation of an interface zone thickness of two times pile diameter using Hardening-Soil model is required to simulate the load-settlement behaviour at higher working loads. The group pile analysis results provide a better load-settlement prediction when incorporating an interface zone thickness of pile dimeter from the pile shat using Hardening-Soil model while leaving the remaining soil as Linear-Elastic material.
      PubDate: 2017-10-28
      DOI: 10.12691/ajcea-5-5-2
      Issue No: Vol. 5, No. 5 (2017)
       
  • Claim Causes and Types in Indian Construction Industry -
           Contractor’s Perspective

    • Authors: Mohammed Taha Al-Qershi; Ravande Kishore
      Pages: 196 - 203
      Abstract: The number and frequency of claims in the current context of very complex and heavy budgeted projects in India are noticeably high which have negative impacts on the budgetary of owners and cause losses of liquidities and restrictions in cash flow for contractors. This study is conducted to determine the main causes of claims and their sources in Indian construction industry. Further, the study is conducted to determine the frequency of different claim types in Indian construction projects, and to provide recommendations and suggestions to avoid/mitigate claims in Indian construction industry. The objectives of the study have been achieved through a valid questionnaire that was distributed and obtained from different contractor’s construction organizations working in Indian construction industry. The results showed that the most important factors that contributed to the generation of claims are delay in handing over site, variation between actual and original quantities, excessive change orders by owner, delay of shop drawings approval by owner’s representative, and scope change of the project. The results also showed that the most frequent claim type in Indian construction projects is extra-work claims.
      PubDate: 2017-11-7
      DOI: 10.12691/ajcea-5-5-3
      Issue No: Vol. 5, No. 5 (2017)
       
  • Architectural Conservation of Decorative Timber Windows and Ornamental
           Columns at Buli Monastery

    • Authors: Dhrubaraj Sharma
      Pages: 204 - 207
      Abstract: Conservation and promotion of traditional architecture is one of the major policies of the Royal Government of Bhutan. It is mandatory for all the buildings to incorporate traditional features to get approval for construction. However, traditional architecture is getting marginalized due to the rampant influx of modern materials, construction methods and software dependent copy and paste designs. This is leading to a facade architecture which is neither modern nor traditional. Falsification of traditional details and the shrinking number of local artisans have all contributed to the deterioration of architectural heritage. This study describes the process of the conservation of timber structures in the ancient Buli monastery that was carried out by the Department of Culture, Bumthang District Administration and the American Himalayan Foundation. The project was successful in the conservation of the decorative timber windows and ornamental columns which was threatening the monument with collapse. The intervention was successful to restore the monument to its original form and conserve the timber members and its architectural heritage.
      PubDate: 2017-11-15
      DOI: 10.12691/ajcea-5-5-4
      Issue No: Vol. 5, No. 5 (2017)
       
 
 
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