| 近场地震作用下考虑二阶效应的混凝土框架抗震分析 |
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| 引用本文： | 易伟建,茹文恺.近场地震作用下考虑二阶效应的混凝土框架抗震分析[J].地震工程与工程振动,2012,32(2):106-113. |
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| 作者姓名： | 易伟建 茹文恺 |
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| 作者单位： | 1. 湖南大学土木工程学院,湖南长沙,410082
2. 武汉市建筑设计院,湖北武汉,430014 |
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| 摘 要： | 利用钢筋混凝土柱的试验结果,验证OpenSees程序用于钢筋混凝土结构非线性分析的可行性。以此为基础,对钢筋混凝土框架结构在远场地震、近场非脉冲地震与近场脉冲地震作用的性能进行非线性时程分析,研究框架结构在三类地震作用下的反应以及二阶效应对结构反应的影响。针对近场脉冲地震对结构进行增量动力分析(IDA)和易损性分析,分别得到结构的IDA曲线、易损性曲线和近场脉冲地震作用下二阶效应对结构抗震性能的影响。分析结果表明,在三类地震作用下,近场脉冲地震导致的二阶效应对结构抗震性能的影响最为显著,结构抗震设计中宜考虑二阶效应的影响。
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| 关 键 词： | 钢筋混凝土框架 近场地震 二阶效应 增量动力分析 易损性分析 |
Seismic analysis of concrete frame structures including second order effect subjected to near-field earthquake ground motions |
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| YI Weijian
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RU Wenkai.Seismic analysis of concrete frame structures including second order effect subjected to near-field earthquake ground motions[J].Earthquake Engineering and Engineering Vibration,2012,32(2):106-113. |
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| Authors: | YI Weijian RU Wenkai |
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| Institution: | 1.College of Civil Engineering,Hunan University,Changsha 410082,China;2.Wuhan Architectural Design Institute,Wuhan 430014,China) |
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| Abstract: | Using the test results of reinforced concrete columns,the feasibility of OpenSees program for the nonlinear analysis of reinforced concrete structures is validated.With the program,the seismic performance of a reinforced concrete frame structure subjected to far-field earthquake,near-field earthquake with or without impulse action is measured by the nonlinear dynamic time history analysis,in order to study the influence of second-order effect on the structural responses under the three types of earthquake ground motions.Aiming at the near field earthquake with impulse action,the incremental dynamic analysis(IDA) and vulnerability analysis are conduced and the IDA curves,fragility curves,and the influence of second-order effect on the seismic performance of the structure are obtained,respectively.Analysis results show that in three types of earthquake ground motions,near-filed earthquake with impulse action has the most significant effect on the structural seismic performance,and the structural seismic design has to consider the second-effect. |
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| Keywords: | reinforced concrete frame near-field earthquake second order effect incremental dynamic analysis vulnerability analysis |
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