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基于IDA法与Pushover法的混凝土核心筒抗震性能对比分析
引用本文:侯炜.基于IDA法与Pushover法的混凝土核心筒抗震性能对比分析[J].地震学刊,2014(2):242-247.
作者姓名:侯炜
作者单位:华侨大学土木工程学院,福建厦门361021
基金项目:国家自然科学基金项目(51308236); 教育部高等学校博士学科点专项科研基金(20133501120003)资助
摘    要:足够数量地震输入的增量动力分析方法(IDA方法)是目前最为真实和先进的模拟结构抗震性能手段,而静力推覆分析方法(Pushover Analysis方法)操作简单,更为实用,可以较好揭示结构从弹性到屈服直至倒塌过程中构件的工作状态。采用2种方法对钢筋混凝土核心筒算例进行评估,并作对比分析。结果表明,采用IDA方法得到的4个性能水平与Pushover方法得到的指标限值有一定误差,但均在一定范围之内,采用IDA方法得到顶点位移角限值偏大;采用单一侧力模式的Pushover方法无法完全体现高阶振型及地震动等因素的影响,造成Pushover方法分析结果与结构实际弹塑性地震响应有一定差异。

关 键 词:增量动力分析(IDA)  静力推覆分析(Pushover  analysis)  钢筋混凝土核心筒  抗震性能

Seismic Behavior Analysis of Reinforced Concrete Core Walls Based on IDA and Pushover Analysis Methods
HOU Wei.Seismic Behavior Analysis of Reinforced Concrete Core Walls Based on IDA and Pushover Analysis Methods[J].Journal of Seismology,2014(2):242-247.
Authors:HOU Wei
Institution:HOU Wei (School of Civil Engineering, Huaqiao University, Xiamen 361021, China)
Abstract:Incremental dynamic analysis(IDA)is the most realistic and advanced analysis method with sufficient earthquake inputs.Static pushover analysis is more simple and practical,and it can better describe the process that from elastic deformation to yield until collapse.The seismic performance of RC core walls is evaluated through the IDA and Pushover methods.The results show that the outputs from IDA method for the required levels of performance(including normal service,temporary service,life safety and collapse prevention)have limited errors,as compared with Pushover method.But it is still within the usual margins of error.The top displacement angle limit value is too large by IDA method.Pushover analysis results are different from the elastic-plastic seismic response results of the actual structure because that Pushover analysis under single lateral force cannot consider the impact of higher modes and ground motion factors.
Keywords:incremental dynamic analysis  static pushover analysis  reinforced concrete core walls  seismic performance
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