近场地震动输入问题的研究  

Study on Selecting Inputting Waves for Seismic Response Analysis Excited by Near-fault Earthquakes

作　　者：高学奎[1] 朱晞[1] 

机构地区：[1]北京交通大学土木建筑工程学院,北京100044

出　　处：《华北科技学院学报》2005年第3期80-83,共4页Journal of North China Institute of Science and Technology

基　　金：国家自然科学基金资助项目(50278002)

摘　　要：用时程分析方法来分析桥梁结构地震响应时,地震波的选择合适与否决定了分析结果的稳定性及可信性。本文提出双参数控制法作为考虑近场地震输入时地震波的选择方法,并与传统的地震波选择方法相比较。利用有限元方法对实际桥墩进行了检算,通过分析得出:采用双参数控制法选波的计算结果离散性比较小且能够反应近场地震的特性;验证了较大PGV/PGA比值的近场地震波会引起结构较大的地震响应的观点;并认为速度脉冲周期不宜作为考虑近场地震输入时选波的指标。When using time-history analysis method to study the seismic responses of bridge structure, the selection of inputting waves is very important. A method of selecting inputting waves is advanced in this paper for seismic responses analysis excited by near fault earthquake, namely the selecting waves method by continuing double parameters, and the traditional method is also introduced for comparing. An actual bridge pier is analyzed, and the results show that, the seismic responses of bridge pier excited by near-fault earthquake waves selected by this method are relatively consistent; the near-fault earthquake that has the larger value of parameter PGV/PGA will cause the stronger seisnaic response; and the velocity pulse period is not an appropriate parameter for selecting near-fault earthquake waves.

关 键 词：近场地震输入 速度脉冲 地震响应 双参数控制 

分 类 号：TN911.251[电子电信—通信与信息系统]