近场地震动输入问题的研究

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英文篇名：Study on Selecting Inputting Waves for Seismic Response Analysis Excited by Near-fault Earthquakes 中文刊名：华北科技学院学报 英文刊名：Journal of North China Institute of Science and Technology 作者：高学奎 ; 朱晞 英文作者：GAO Xue-kui ; ZHU Xi(School of Civil Engineering and Architecture ; Beijing Jiaotong University ; Beijing 100044) 中文关键词：近场地震输入 ; 速度脉冲 ; 地震响应 ; 双参数控制 英文关键词：Inputting waves of near-fault earthquakes ; Velocity pulse ; Seismic response ; The selecting waves method by controlling double parameters 出版日期：2005-09-25 机构：北京交通大学土木建筑工程学院,北京交通大学土木建筑工程学院 北京100044 ,北京100044 年：2005 期：03 出版单位：华北科技学院学报

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 controlling 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 seismic response;and the velocity pulse period is not an appropriate parameter for selecting near-fault earthquake waves.

引文

[1]李新乐.近断层区桥梁结构的设计地震与抗震性能分析.北京交通大学博士学位论文.2004.(12).
    [2]中华人民共和国标准.铁路工程抗震设计规范(GBJ111-87).北京:中国计划出版社,1988.
    [3]John.F.Hall.Seismic Response of Frame Build-ing to Near-Source Ground motions.Earthquakeand Engineering Dynamics,1998,27:1446-1466.