摘要
ETM是通过对结构输入一条随着时间增加,地震动强度不断增大的地震动加速度时程曲线,进而分析结构从弹性响应到倒塌状态的整个过程。本文基于ETM合成了三条符合我国抗震规范反应谱的耐震时程加速度曲线,并对其反应谱进行了误差分析。使用SAP2000建立一个六层钢筋混凝土框架结构弹塑性模型,并对模型塑性铰设置的可靠性进行验证,最后对结构进行耐震时程分析和增量动力分析,对比分析两种方法得到的最大顶点位移、最大层间位移角、最大基底剪力等结构响应结果。结果表明,合成的耐震时程加速度曲线合理可靠,模型符合分析要求,耐震时程法能较好的预测结构的地震响应,其分析结果与增量动力分析基本吻合,且计算效率高。
The endurance time method（ ETM） is introduced. By inputting a time-history curve of acceleration of ground motion with time increasing,the intensity of ground motion increases gradually.The whole process of the structure from elastic response to collapse state can be calculated. Three endurance time accelerograms（ ETA） are generated based on the national seismic design spectra,and the error analysis of the reaction spectrum is also carried out. An elastoplastic model of a six-story reinforced concrete frame structure is established by using SAP2000,and the reliability of the plastic hinge setting of the model is verified. Finally,incremental dynamic analysis of structures and endurance time analysis of structures are carried out. The comparisons of the maximum roof displacement,the maximum interstory drift ratio and the maximum base shear are performed. The results show that the endurance time accelerograms curve is reasonable and reliable,the model meets the requirement of analysis,and ETM can predict the seismic response of structures better. The analysis results are basically consistent with the incremental dynamic analysis,and the calculation efficiency is high.
作者
马永涛
高泽宇
高庚元
龙晓鸿
MA Yong-tao;GAO Ze-yu;GAO Geng-yuan;LONG Xiao-hong(School of Civil Engineering and Mechanics;Hubei Key Laboratory of Control Structure,Huazhong University of Science and Technology,Wuhan 430074,China;2.School of Civil Engineering,Architecture and Environment,Hubei University of Technology,Wuhan 430068,China;3.The 7th Engineering Co Ltd,China Railway Major Bridge Engineering Group,Wuhan 430050,China)
出处
《土木工程与管理学报》
北大核心
2018年第5期175-181,共7页
Journal of Civil Engineering and Management
关键词
耐震时程法
钢筋混凝土框架结构
抗震分析
增量动力分析
endurance time method
reinforced concrete frame structure
seismic analysis
incremental dynamic analysis
