综合考虑场地特征周期和结构基本周期影响的地震动选择方法研究

Study on the ground motion selection method under considering the influence of site characteristic period and structural basic period

结构时程分析中选择合适的地震动记录至关重要。以地震动反应谱与规范设计反应谱相匹配为原则,重点考虑场地特征周期和结构基本周期的影响,全周期控制地震动反应谱与设计反应谱的一致性,提出新的地震动选择方法;将选出的地震动记录带入结构时程分析,以我国抗规时程分析基底剪力要求为评价原则,分析结构时程基底剪力结果,验证本方法的可行性,并与另外两种方法选择地震动记录的时程结果对比分析,验证本方法的优越性。本研究旨在为建筑结构时程分析找到一种操作简单、计算效率高且适用性较强的地震动记录选择方法。

It’s important to select suitable ground motion records in structural time history analysis.Based on the principle of matching ground motion response spectra with the design response spectrum,a new method of ground motion selection is proposed,by considering the influence of site characteristic period and structural basic period,and controlling the consistency of ground motion response spectra and the design response spectrum in the whole period.The selected ground motion records are introduced into the structural time history analysis,and the base shear results of the structural time history are analyzed on the basis of the principle in Chinese code.And the feasibility of this method is verified.The method is proved to be superior to the time history results of seismic records selected by the other two methods.The purpose of this study is to find a simple,efficient and suitable method for time history analysis of buildings.