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Finite Element Analysis of UCSD Shear Columns


Finite element analyses were conducted of 'as-built' and seismically retrofitted RC bridge columns tested at UCSD. The 'as-built' columns were provided with the same rectangular cross section and shear reinforcement, resulting in approximately the same shear capacity, but were designed to fail at different levels of ductility in either a brittle or flexural shear failure. This was accomplished by adjusting the shear force demand by varying the column height (or aspect ratio) and the grade of longitudinal reinforcement. In the analysis the challenge was to capture the overall force-deformation hysteretic behavior and failure mechanism, as well as the individual deformation components of flexure and shear. The analysis focuses on the shear behavior of concrete under large tensile strains and calibrates the shear stress capacity to the concrete component of the UCSD shear model, which reduces as a function of curvature ductility at the critical section. Also, the shear modulus is reduced in proportion to the ratio of cracked to gross flexural stiffness. The results show that a relatively simple design oriented shear capacity model can be used to calibrate the required shear parameters of the 3-D plasticity concrete model. In the paper, detailed finite element analyses are conducted to assess the shear force capacity and post-peak deformation response of shear dominated RC bridge columns.......

【作者名称】: R. K. Dowell, D. R. Parker
【作者单位】: Department of Structural Engineering at the University of California, San Diego and Principal of Dowell-Holombo Engineering, Inc
【关 键 词】: ductility, nonlinear finite element analysis, reinforced concrete, seismic loading, shear capacity, shear columns
【会议名称】: ACI (American Concrete Institute) Fall 2000 Convention, Fall 2000, Toronto
【期刊论文数据库】: [DBS_Articles_01]
【期刊论文编号】: 101,629,214
【摘要长度】: 1,407
【会议地点】: Toronto(CA)
【会议组织】: Department of Structural Engineering at the University of California, San Diego and Principal of Dowell-Holombo Engineering, Inc
【会议时间】: 2000
【上篇论文】: 外文会议 - STUDY AND PRACTICE IN THE CONDITION ASSESSMENT STSTEM OF LONG SPAN BRIDGES
【下篇论文】: 外文会议 - Central to Decentral Quantitative Monitoring of Progress Using a Rating System

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