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American Journal of Civil Engineering and Architecture

ISSN (Print): 2328-398X

ISSN (Online): 2328-3998

Website: http://www.sciepub.com/journal/AJCEA

Article

The Investigation of Effective Parameters on the Stability of Concrete Gravity Dams with Case Study on Folsom, Blue Stone, and Pine Flat Dams

1Department of Civil Engineering, Master of civil Engineering, young researchers and elite club, roudehen branch, islamic azad university, roudehen, Iran

2Professor, Department of Civil Engineering, Faculty of Civil Engineering, The University of Roudehen Branch, Tehran, Iran

3Doctor of civil engineering structures, an associate professor and head of University of Science and Technology


American Journal of Civil Engineering and Architecture. 2014, 2(5), 167-173
DOI: 10.12691/ajcea-2-5-3
Copyright © 2014 Science and Education Publishing

Cite this paper:
Elyas behradimehr, afshin mansouri, babak aminnejad, mohammad ali barkhordari bafghi. The Investigation of Effective Parameters on the Stability of Concrete Gravity Dams with Case Study on Folsom, Blue Stone, and Pine Flat Dams. American Journal of Civil Engineering and Architecture. 2014; 2(5):167-173. doi: 10.12691/ajcea-2-5-3.

Correspondence to: Elyas  behradimehr, Department of Civil Engineering, Master of civil Engineering, young researchers and elite club, roudehen branch, islamic azad university, roudehen, Iran. Email: bakhsat_engineer@yahoo.com

Abstract

In this research, the effective parameters in stability of concrete gravity dams in the form of case study on three important dams: Blue stone; Folsom; and Pine Flat, are investigated. Typically, cognition and understanding of effective parameters in stability and knowing the role of each them, in designing new dams, could be very helpful. Concrete gravity dams (which are surveyed in this research) have their strength and stability because of their weight. The shape of their section are triangle and commonly, The base of the triangle is greater than the dam is stable, the more stable dam is. Also, in this investigation we are going to study the horizontal displacement called sliding of dam’s bottom, in contact with foundation by ABAQUS software. The sliding displacement has no considerable change in each of the three nodes on heel and toe, and also in middle part of dam, and eventually is equal in each three and all parts of the dam’s bottom and foundation. With choosing three nodes on the dam’s bottom and similar nodes on the foundation, and with differentiating horizontal displacements of these nodes with each other, the relative displacements of dam are obtained. With using these displacements acquired from ABAQUS software in RS-DAM software, we show them as time series graph and relative displacement. Whenever this graph has a jump with the increase of earthquake PGAs (end of the graph moves away from the starting point of it), dams is considered as unstable.

Keywords

References

[1]  Lo, K.Y. and Ogawa, T. “The Evaluation of Existing Concrete Dams on Rock Foundations and Remedial Measures”, International Commission on Large Dams, 1991.
 
[2]  Chavez, J. W. and Fenves G. L. “Earthquake Response of Concrete Gravity Dams Including Base Sliding”, Journal of Structural Engineering, ASCE, Vol. 121, No. 5, 865-875, 1995.
 
[3]  Horyna, T. “Reliability Analysis of Base Sliding of Concrete Gravity Dam Subjected to Earthquake”, University of British Columbia, 1999.
 
[4]  Ruggeri, G. “Working Group on Sliding Safety of Existing Dam”, Final Report, ICOLD European Club, 2004.
 
[5]  Ftima, M. B. and Leger, P. “Seismic Stability of Cracked Concrete Dams Using Rigid Block Models”, 2006.
 
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[6]  11- Fishman, Y. A. "Stability of Concrete Retaining Structures and Their Interface with Rock Foundations", 2009.
 
[7]  Fishman, Y. A. "Stability of Concrete Retaining Structures and Their Interface with1 Rock Foundations", 2009.
 
[8]  US Ar my Corps of Engineers (USACE), "Roller-Compacted Concrete, EM 1110-2-2006, 2000.
 
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Article

Hydration and Strength Behavior of Sugarcane-Baggase Ash Concrete Using Electrical Resistivity Measurement

1Civil Engineering and Mechanics, Huazhong University of Science and Technology, Wuhan, China

2Civil Engineering Department, Hassan Usman Katsina Polytechnic, Katsina State , Nigeria


American Journal of Civil Engineering and Architecture. 2014, 2(5), 174-176
DOI: 10.12691/ajcea-2-5-4
Copyright © 2014 Science and Education Publishing

Cite this paper:
Muazu Bawa Samaila, Wei Xiaosheng, Ashhabu Elkaseem. Hydration and Strength Behavior of Sugarcane-Baggase Ash Concrete Using Electrical Resistivity Measurement. American Journal of Civil Engineering and Architecture. 2014; 2(5):174-176. doi: 10.12691/ajcea-2-5-4.

Correspondence to: Muazu  Bawa Samaila, Civil Engineering and Mechanics, Huazhong University of Science and Technology, Wuhan, China. Email: muazubawaf@yahoo.com

Abstract

Electrical resistivity method was adopted in monitoring the hydration of concrete containing different percentage of baggase ash. It has been discovered that the bulk electrical resistivity is a function of the solution electrical resistivity and porosity. Two model components were suggested where the solution resistivity was dominated by bulk resistivity at early age then by porosity at later age. The result found that the pore discontinuity occurs faster with increasing baggase ash quantity up to 20% then started declining meaning that 20% is within the optimum range of the baggase ash quantity to be used and this is similar to the results obtained from compressive strength, setting time tests.

Keywords

References

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[3]  Singh, N.B., Singh, V.D., and Rai, S., “Hydration of bagasse ash-blended Portland cement,” Cem. Concr. Res., 30 (9). 1485-1488, Sept. 2000.
 
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[5]  Zongjin, L., Lianzhen, X., and Xiaosheng, W., “Determination of concrete setting time using electrical resistivity measurement,” Journal of materials in civil engineering, 19 (5), 423-427. May 2007.
 
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[6]  ASTM-Standards “Standard Test Method for Setting Time of Hydraulic Cement”, C191-92, 1993, 866-868.
 
[7]  Zongjin, L., Xiaosheng, W, and Wenlai, L., “Preliminary interpretation of Portland cement hydration process using resistivity measurements,” Material Journal, American Concrete Institute, 100 (3): 253-257. June 2003.
 
[8]  Xiaosheng, W., Lianzhen, X., and Zongjin L., “Electrical measurement to assess hydration process and the porosity formation,” Journal of Wuhan University of Tech., 23 (5): 761-766. 2008.
 
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Article

Optimizing the Risk-preparedness and Disaster Management Systems of all World Heritage Sites by Exploiting HPWS and Conform to the UNESCO Guidelines

1Faculty of Architecture and Environmental Design, (IIUM), Gombak, Malaysia


American Journal of Civil Engineering and Architecture. 2014, 2(6), 177-185
DOI: 10.12691/ajcea-2-6-1
Copyright © 2014 Science and Education Publishing

Cite this paper:
Mehdi S. Kaddory Al-Zubaidy. Optimizing the Risk-preparedness and Disaster Management Systems of all World Heritage Sites by Exploiting HPWS and Conform to the UNESCO Guidelines. American Journal of Civil Engineering and Architecture. 2014; 2(6):177-185. doi: 10.12691/ajcea-2-6-1.

Correspondence to: Mehdi  S. Kaddory Al-Zubaidy, Faculty of Architecture and Environmental Design, (IIUM), Gombak, Malaysia. Email: mkaddory@yahoo.com

Abstract

The paper examines the possible efficacy of HPWS (High-Performance Work System) in optimizing the risk-preparedness and disaster management of the World Heritage Sites (WHS), using Alhambra Palace, Spain, as the test site. Most of the WHSs are vulnerable to various types of risks, and the UNESCO has set a stringent standard for their maintenance, failing which any WHS will lose its title. The paper has a goal of finding a common risk-preparedness and disaster management solution that would enable all WHSs to conform to the maintenance standard set by the UNESCO. A test survey conducted on Alhambra site WHS which chosen as a case study of World Heritage Sites under UNESCO, the feedback shown that it is possible to exploit HPWS to optimize the risk-preparedness and disaster management systems of all World Heritage Sites and conform to the UNESCO Guidelines.

Keywords

References

[1]  UNESCO, (2009). Strengthening Disaster Risk Reduction at World Heritage Properties: the Olympia Protocol for International Cooperation. [online]. Available at http://www.iaaconservation.org.il/images/files/pdf_docs/Olympia_Protocol.pdf.
 
[2]  UNESCO. (2012). World heritage list. [Online] Available: http://whc.unesco.org/en/list (January 12, 2011).
 
[3]  Rits-DMUCH. (2012). UNESCO Chair Program on Cultural Heritage and Risk Management International Training Course on Disaster Risk Management of Cultural Heritage 2012. [online]. Available at http://www.ritsumeigcoe.jp/heritagerisknet.dmuch/detail/what/201203/ITC2012_backgroundandobjective.pdf.
 
[4]  George, P. (2012). Disaster archaeology. [online]. Available at http://www.drgeorgepc.com/DisastersCulturalSites.html.
 
[5]  Wright, P and Guthrie, J. (2005). Labor productivity and HRM. Academy of Management Journal, 46(1), pp. 137-174.
 
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[6]  Gardner, T. and Allen, M. (2005). Relationship between worker performance and HR practices. Personnel Psychology, 57: 4, 419-416.
 
[7]  Stovel, H. (1998). Risk preparedness: A management manual for World Cultural Heritage. Rome: ICCROM.
 
[8]  Shaw, D and Delery, J. (2001). Research in Personnel and HR management. Greenwich, CT: Jai Press.
 
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[21]  Barnes, W. F. (2001). The challenge of implementing and sustaining high performance work system in the United States: An evolutionary analysis of I/N Tek and Kote. Doctoral dissertation: University of Notre Dame.
 
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[29]  Owen Jones and the Alhambra, (2012), [Online] Available: http://www.alhambrapatronato.es/index.php/Exhibition/719+M5728c79703e/0/?&cHash=57c0703348a63747a1ab8e27159513ec (December 22, 2012).
 
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[34]  Al-Zubaidy, Mehdi S. Kaddory; Omer, Spahic; Abdullah, Alias (2012), Exploiting HPWS to Fulfil UNESCO Goals of Preserving and Utilising WHSs FOR THE Benefit of Mankind Part 1, Journal of Knowledge & Human Resource Management, Vol. 4 Issue 8, p88.
 
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Article

Reducing Construction Disputes through Effective Claims Management

1Construction Engineering & Utilities Department, Zagazig University, Zagazig, Egypt


American Journal of Civil Engineering and Architecture. 2014, 2(6), 186-196
DOI: 10.12691/ajcea-2-6-2
Copyright © 2014 Science and Education Publishing

Cite this paper:
Hossam H. Mohamed, Ahmed H. Ibrahim, Asmaa A. Soliman. Reducing Construction Disputes through Effective Claims Management. American Journal of Civil Engineering and Architecture. 2014; 2(6):186-196. doi: 10.12691/ajcea-2-6-2.

Correspondence to: Asmaa  A. Soliman, Construction Engineering & Utilities Department, Zagazig University, Zagazig, Egypt. Email: asmaamadany@hotmail.com

Abstract

Reducing construction disputes appears to be the main goal for many researchers in the last decay. Each of them has attempted to clearly identify the expected causes of disputes. Construction claims can be considered as a main source of disputes. This paper aims to identify the most important causes that converting construction claims into disputes. A proposed system that can help to avoid converting construction claims into disputes was provided. Factors that causing disputable claims were identified through four stages. The first stage 140 factors that causing disputable claims were collected from international literature. The second stage a brainstorming was used to reduce the number of these factors and get the most common factors causing disputable claims. Hence 31 factors were only considered. These factors were divided into three major categories: behavioral, contractual and operational matters. Through third stage, the thirty one factors were subjected to a further survey to identify their importance index (relative significance). One hundred and two interviews were conducted and their results are employed to develop an importance index score for these disputable claims causes. Furthermore, the thirty one disputable claims causes were then ranked according to their relative importance. The fourth stage, The 80/20 rule applied to the causes identified to get the eight most important causes that represented about 25% of the causes. The most important eight factors were considered as the factors that converting claims into disputes which identified as follows: 1) delay interim payment from client, 2) qualification of team work, 3) extension of time, 4) incomplete drawings and specification, 5) Poorly written contracts clauses, 6) change orders, 7) cooperation and communication nature among project team, 8) late supply of equipment and materials. A proposed system for avoiding converting claims into disputes was presented. Furthermore, a checklist was designed during construction stage and four actual case studies were considered and discussed.

Keywords

References

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[2]  Charehzehi, A. and Ahankoob, A, “The use of analytical approach for the selection of dispute resolution”. Department of Structure and Materials, Faculty of Civil Engineering, University of Teknologi Malaysia (UTM), Johor Bahru, Johor, Malaysia, 2013.
 
[3]  Easterby-Smith, M., Thorpe, R. and lowe, A, “ Management research: a introduction “, SAGE publications Ltd, 2002.
 
[4]  El-Mesteckawi, L, “Managing construction disputes in Egypt”, M.Sc. Thesis, Cairo University, Egypt, 2007.
 
[5]  EL-Touny, A., “Estimating contingency cost for highway construction projects”. M.Sc.Thesis, Zagazig University. Egypt, 2014.
 
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[6]  El-Wakel, E., “Developing computerized construction claims decision support system to raie ability of construction management team against claims”. M.Sc.Thesis, Zagazig University, Egypt, 2006.
 
[7]  Fakhr El-Deen, Sh., “Efficiency of construction claim management process. M.Sc. Thesis, Arab Academy for Science Technology and Maritime Transportation, Egypt, 2012.
 
[8]  Gebken, R., “Quantification of transactional dispute resolution costs for the U.S. construction industry”, PHD, thesis, The University of Texas at Austin, 2006.
 
[9]  Ibrahim, M., “Estimating minimum acceptable construction claim amounts in negotiation process.” M.Sc.Thesis, Cairo University, 2007.
 
[10]  Kumaraswamy, M., “Conflicts, claims and disputes”, Journal of Engineering, Construction and Architectural Management”, 4(2), 1997, pp.95-111.
 
[11]  Tochaiwat, K. and Chovichien, V., “Problems of clients’ construction claim management in Thailand”. Department of Civil Engineering, Chulalongkorn University, Bangkok, Thailand, 2007.
 
[12]  Ren, Z., Anumba, C. and Ugwu, O., “Towards a multi-agent system for construction claims negotiation”, Department of Civil & Building Engineering, University of Loughborough, Loughborough, UK, 2000.
 
[13]  Soliman, A.A. (Incomplete), “Effective claims management to reduce risks of construction disputes”. M.Sc.Thesis, Zagazig University, Egypt.
 
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Article

A Literature Evaluation of the Energy Efficiency of Leadership in Energy and Environmental Design (LEED) -Certified Buildings

1Faculty of Architecture and Environmental Design, (IIUM), Gombak, Malaysia


American Journal of Civil Engineering and Architecture. 2015, 3(1), 1-7
DOI: 10.12691/ajcea-3-1-1
Copyright © 2015 Science and Education Publishing

Cite this paper:
Mehdi S. Kaddory Al-Zubaidy. A Literature Evaluation of the Energy Efficiency of Leadership in Energy and Environmental Design (LEED) -Certified Buildings. American Journal of Civil Engineering and Architecture. 2015; 3(1):1-7. doi: 10.12691/ajcea-3-1-1.

Correspondence to: Mehdi  S. Kaddory Al-Zubaidy, Faculty of Architecture and Environmental Design, (IIUM), Gombak, Malaysia. Email: mkaddory@yahoo.com

Abstract

The Leadership in Energy and Environmental Design offers a means of certifying buildings that ensure environmental sustainability. Among the key areas evaluated for the certification is the energy efficiency of the design. Most of the studies selected showed that LEED certified buildings registered energy efficiency benefits. However, a few articles challenged these findings, citing that some LEED certified buildings did not show improvement in energy efficiency compared to non-LEED certified buildings. The disparity in study findings relates to the research design of the documents studied, the design-orientation of the LEED system, differences in occupancy numbers and building energy uses and the disparity in construction periods for the buildings under study.

Keywords

References

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[43]  Mehdi S. Kaddory Al-zubaidy. (Vol. 3 - Issue 11 (November - 2014)). “Use of Novel Green Energy Design in Sustainable Buildings to Mitigate Effects of Climate Change”, International Journal of Engineering Research & Technology (IJERT).
 
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Article

Geotechnical Properties of Sub- Soils in Escravos Estuary, Western Niger Delta, Nigeria

1Department of Geology, University of Port Harcourt, Nigeria

2Department of Geology, Federal University of Technology, Minna, Nigeria

3Geostrat International Services Limited, No.14 Mannila Pepple Street, D-Line, Port Harcourt, Nigeria


American Journal of Civil Engineering and Architecture. 2015, 3(1), 8-14
DOI: 10.12691/ajcea-3-1-2
Copyright © 2015 Science and Education Publishing

Cite this paper:
H.O Nwankwoala, A.N. Amadi, T. Warmate, M. O. Jimoh. Geotechnical Properties of Sub- Soils in Escravos Estuary, Western Niger Delta, Nigeria. American Journal of Civil Engineering and Architecture. 2015; 3(1):8-14. doi: 10.12691/ajcea-3-1-2.

Correspondence to: A.N.  Amadi, Department of Geology, Federal University of Technology, Minna, Nigeria. Email: geoama76@gmail.com

Abstract

This study evaluates the sub-soil geotechnical characteristics at the onshore pipeline route at Escravos estuary, Western Niger Delta, Nigeria. Acquisition of soil samples for geotechnical studies was done by conventional boring method using light shell and auger hand rig. Samples were analyzed in the laboratory using standard analytical procedures. The samples explored showed a profile of very soft greenish dark grey and reddish brown clay formation. All samples observed confirmed this lithostratigraphy except for some of the grab samples. The entire formation generally, presents a low amount of organic content, low shear strength and high carbonate content. The unit weight showed an increase with high carbonate content. The samples gave a high amount of moisture content, higher than the liquid limit which indicates that on loading the pipeline route, the weight of the pipeline will dissipate a large amount of the pore water with a resultant increase in settlement. The pipeline should be placed on slippers pad at designated locations on the seabed along the survey route to avoid excessive settlement. This would distribute the anticipated pressure from the pipeline over a greater area and thus reduce the excessive settlement which is the characteristics of the very soft marine clay encountered in this investigation. The dimensions and bearing capacity of such slippers pads can easily be determined.

Keywords

References

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Article

The Importance of New Technology for Delay Mitigation in Construction Projects

1Tarbiat Modares University, Tehran, Iran

2Sharif University of Technology, Tehran, Iran


American Journal of Civil Engineering and Architecture. 2015, 3(1), 15-20
DOI: 10.12691/ajcea-3-1-3
Copyright © 2015 Science and Education Publishing

Cite this paper:
Samad M E Sepasgozar, Mohamad Ahmadzade Razkenari, Khalegh Barati. The Importance of New Technology for Delay Mitigation in Construction Projects. American Journal of Civil Engineering and Architecture. 2015; 3(1):15-20. doi: 10.12691/ajcea-3-1-3.

Correspondence to: Khalegh  Barati, Sharif University of Technology, Tehran, Iran. Email: khalegh.barati@yahoo.com

Abstract

Construction technology has a great potential to improve productivity and decrease project duration. Delay happens in many construction projects, although the priority of delay causes is different in various countries due to environmental effects. Delays can lead to considerable negative effects such as lawsuits between owners and contractors, loss of productivity and revenue, and contract termination. This paper presents key sources of construction projects delay in Iran, following a review of publications related to delay. In addition, the paper presents the relationship between new technology and time overrun in those projects. One of the main causes of delay in many projects is that they use an old generation of construction technologies; however, the role of technology adoption in delay is ignored. In order to collect first-hand data to explore the delay sources, experienced project managers of the residential and industrial projects were recruited. Experienced professionals from twenty six companies participated in this study. Seventy-three delay causes were identified in the sample projects, in which 25 factors were related to the new technology restriction. The result of the study assists policy makers and practitioners to understand the actual factors causing delay. The value of the study is that it investigates three main issues such as frequency of occurrence, degree of severity, and importance of each factor. Different than other studies, the paper focuses on technology attributes that may affect the project scheduling and time.

Keywords

References

[1]  Sepasgozar, M.E. Samad; Shirazi, M. Sasan. (2008). Delay analysis due engineering document in construction and industrial project and contractors claim; case of Iran. The first Intel conference on strategic project management (pp. 21-31). Tehran: Sharif University.
 
[2]  Abd El-Razek, M., Bassioni, H., & Mobarak, A. (2008). Causes of delay in building construction projects in Egypt. Journal of construction engineering and management, 134(11), 831-841.
 
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Article

Factors Affecting on Productivity of Oil and Gas Construction Projects: An AHP Analysis

1Sharif University of Technology, Tehran, Iran

2Tarbiat Modares University, Tehran, Iran


American Journal of Civil Engineering and Architecture. 2015, 3(1), 21-27
DOI: 10.12691/ajcea-3-1-4
Copyright © 2015 Science and Education Publishing

Cite this paper:
Khalegh Barati, Samad M.E. Sepasgozar. Factors Affecting on Productivity of Oil and Gas Construction Projects: An AHP Analysis. American Journal of Civil Engineering and Architecture. 2015; 3(1):21-27. doi: 10.12691/ajcea-3-1-4.

Correspondence to: Samad  M.E. Sepasgozar, Tarbiat Modares University, Tehran, Iran. Email: khalegh.barati@yahoo.com; samad.sepasgozar@gmail.com

Abstract

The oil and gas construction sector is one of the main industries all over the world which plays a powerful role in economic growth of all countries inasmuch as accounts 5 to 10 percent of Gross national product (GNP) of countries. Over the last decade, by considering the huge amount of money spent in constructing these kinds of mega projects, the issue of identifying affecting factors and their roles on productivity has become main challenge for engaging teams in the process of execution. In spite of its importance, no extensive and comprehensive researches have been yet conducted to assess the effective factors in productivity of these projects. This paper presents several factors affecting the productivity in the oil and gas construction projects. The paper also provides a priority list of important factors affecting the productivity based on a survey conducted in a large oil zone. Respondents involved in employer organizations, construction managers and consultants, contractor teams and university lecturers. Finally, through Analytical Hierarchical Process (AHP) and paired comparison between the effective factors and categorized groups, the importance and the effect of these factors on productivity of oil and gas construction projects were obtained. The result of the analysis shows that management factors are most effective factors while project’s factors do not have significant effect on productivity.

Keywords

References

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Article

Numerical Modelling of RC Columns Subjected to Biaxial Horizontal Loading and Variable Axial Load

1Faculty of Engineering of the University of Porto, Department of Civil Engineering - Structural Division, R. Dr. Roberto Frias - 4200-465 Porto - Portugal

2School of Technology and Management, Polytechnic Institute of Leiria, Campus 2 - Morro do Lena - Alto do Vieiro, Apartado 4163-2411-901 Leiria, Portugal


American Journal of Civil Engineering and Architecture. 2015, 3(1), 28-38
DOI: 10.12691/ajcea-3-1-5
Copyright © 2015 Science and Education Publishing

Cite this paper:
André Furtado, Hugo Rodrigues, António Arêde. Numerical Modelling of RC Columns Subjected to Biaxial Horizontal Loading and Variable Axial Load. American Journal of Civil Engineering and Architecture. 2015; 3(1):28-38. doi: 10.12691/ajcea-3-1-5.

Correspondence to: Hugo  Rodrigues, School of Technology and Management, Polytechnic Institute of Leiria, Campus 2 - Morro do Lena - Alto do Vieiro, Apartado 4163-2411-901 Leiria, Portugal. Email: hugo.f.rodrigues@ipleiria.pt

Abstract

Annumerical study of RC columns subjected to variable axial load in conjunction with biaxial cyclic bending are presented in this article. The numerical models were built to simulate the response of all specimens using the computer program SeismoStruct and adopting three different modelling strategies, such as lumped plasticity and distributed plasticity (based in displacements and forces formulations) that were adopted in order to obtain the real behaviour of the RC columns. The efficiency of each modelling strategy is evaluated through the comparison between the experimental global hysteretic behaviour, stiffness degradation, columns capacity and energy dissipation and the numerical results.

Keywords

References

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Article

Levee Breaching Process of a River and Disaster Risk on Floodplain

1School of Agriculture and Rural Development, Bangladesh Open University, Gazipur, Bangladesh

2Department of Civil Engineering, Graduate School of Engineering, Nagoya University, Japan


American Journal of Civil Engineering and Architecture. 2015, 3(2), 39-44
DOI: 10.12691/ajcea-3-2-1
Copyright © 2015 Science and Education Publishing

Cite this paper:
Md. Serazul Islam, Tetsuro Tsujimoto. Levee Breaching Process of a River and Disaster Risk on Floodplain. American Journal of Civil Engineering and Architecture. 2015; 3(2):39-44. doi: 10.12691/ajcea-3-2-1.

Correspondence to: Md.  Serazul Islam, School of Agriculture and Rural Development, Bangladesh Open University, Gazipur, Bangladesh. Email: seraz_bou@yahoo.com

Abstract

Small-scale laboratory experiments and same scenario numerical analyses were conducted to understand levee breaching phenomena and subsequent disasters risk in floodplain focusing on the effects of the relative height of river bed to the floodplain and the bed materials. In the present study, the area including river, levee and floodplain has been reproduced in both experiment and numerical simulation because not only the behavior of levee but also the phenomena in river and floodplain are intimately related to one another. As a result the followings have been clarified: Higher bed level brings more rapid propagation of the levee breach and widening with more inundation and sediment deposition on the floodplain. River bed degradation in the upstream of the levee breaching point may cause further risk of breach. While as for the effect of bed materials, it has exposed that the finer materials has higher risk not only by more deposition on the floodplain but also by remarkable river bed degradation.

Keywords

References

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