考虑地震动局部场地效应的大跨度斜拉桥随机地震响应分析

英文篇名：Stochastic Seismic Response of Long-Span,Cable-Stayed Bridges under Local Site Effect
中文刊名：地震研究
英文刊名：Journal of Seismological Research
作者：武芳文 ; 赵雷
英文作者：WU Fang-wen 1 ; ZHAO Lei 2 (1.School of Highway ; Chang'an University ; Xi'an 710064 ; Shaanxi ; China)(2.School of Civil Engineering ; Southwest Jiaotong University ; Chengdu 610031 ; Sichuan ; China)
中文关键词：桥梁工程 ; 随机振动 ; 斜拉桥 ; 地震动 ; 局部场地效应
英文关键词：bridge engineering ; stochastic vibration ; cable-stayed bridge ; earthquake motion ; local site effect
出版日期：2010-01-15
机构：长安大学公路学院;西南交通大学土木工程学院;
年：2010
期：01
出版单位：地震研究

摘要

基于随机振动理论,以苏通长江公路大桥为例,研究了局部场地效应对大跨度斜拉桥地震反应的影响。结果表明:与一致激励相比,局部场地效应对结构的内力和位移影响显著;场地效应对主梁、索塔内力和位移的影响程度及规律也不尽相同,须区别对待分析。
With the growth of the main span of the cable-stayed bridges,the spatial effect of earthquake motion for the spatial structures becomes a new research topic.Based on stochastic vibration theory and taking the example of SuTong Yangtze River Highway Bridge,the stochastic seismic response of super-long-span,cable-stayed bridge under local effect is developed.The results indicate that the internal force and displacement are influenced obviously by local site effect than by the uniform excitation.For different responses of internal force and displacement of the girder and tower,the impact and the rules are different for seismic ground motion under local effect.Therefore,in view of different cases,the analyses would have different results.

引文

杜修力.1998.水工建筑物抗震可靠度设计和分析用的随机地震输入模型[J].地震工程与工程振动,18(4):76-81.
    杜修力,陈厚群.1994.地震动随机模拟及其参数确定方法[J].地震工程与工程振动,14(4):1-5.
    黄用军,王群.1997.二维地震动的局部场地效应的研究[J].武汉工业大学学报,19(2):52-54.
    解丽,卢勇坤,非明伦.2008.汶川8.0级地震桥梁震害[J].地震研究,31(增刊):530-534.
    林家浩,张亚辉,赵岩.2001.大跨度结构抗震分析方法及近期进展[J].力学进展,31(3):250-360.
    屈铁军,王君杰,王前信.1996.空间变化的地震动功率谱的实用模型[J].地震学报,18(1),55-62.
    王光远,程耿东,邵卓民,等.1999.抗震结构的最优设防烈度与可靠度[M].北京:科学出版社.
    周勇军,全伟,贺拴海.2006.基于正交试验的连续刚构桥地震响应敏感性参数分析[J].地震研究,29(2):176-182.
    Z e rva A.1988.Lifeline response to spartially variable ground motion[J].Earthquake Engineering and Structural Dynamics,17(7):361-379.
    Ze rva A.1991.Effect of spartial variablity and propagation of seismicground motion on the response of multiply supported structures[J].Probabilistic Engineering Mechanics,(7):217-226.