行波效应对铁路大跨连续刚构桥地震反应的影响
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摘要
介绍了模拟地震地面运动的大质量法,推导了大跨度桥梁考虑行波效应的分析模型及解析方法。以大准黄河特大桥为工程背景,选取墩身刚度、地震波视波波速及不同的地震记录为主要参数,进行了考虑行波效应下铁路大跨连续刚构桥的时程反应分析,并与一致激励下的结果进行了对比。系统总结了此类桥梁在行波效应激励下的地震反应特点。本文分析方法和结果对同类桥梁的设计与研究具有一定的参考价值。
The large mass method for simulating ground motion is introduced,the model and equations used for considering the seismic effects of traveling wave on long-span bridge are derived.Taking Dazhun great bridge on Yellow river as an example,considering such main parameters as pier shaft stiffness,earthquake wave speed and different ground acceleration time-history,the seismic response of railway long-span continuous rigid-frame bridge under excitation of traveling waves is analyzed,and the comparative analysis of the results with uniform excitation are made also.The characteristics of seismic response on the bridge are systematically summarized.The analysis method and results in the paper are of certain reference to the design and research of similar bridges.
The large mass method for simulating ground motion is introduced,the model and equations used for considering the seismic effects of traveling wave on long-span bridge are derived.Taking Dazhun great bridge on Yellow river as an example,considering such main parameters as pier shaft stiffness,earthquake wave speed and different ground acceleration time-history,the seismic response of railway long-span continuous rigid-frame bridge under excitation of traveling waves is analyzed,and the comparative analysis of the results with uniform excitation are made also.The characteristics of seismic response on the bridge are systematically summarized.The analysis method and results in the paper are of certain reference to the design and research of similar bridges.
引文
[1]石玉成,卢育霞.汶川8.0级地震甘肃灾区震害特点及恢复重建对策[J].西北地震学报,2009,31(1):1-7.
[2]曾金艳,李自红,陈文.基岩输入参数对场地地震反应的影响分析[J].西北地震学报,2009,31(2):110-114.
[3]李杰,李娜.基于二维相干性自锚式悬索桥的地震响应研究[J].西北地震学报,2008,30(2):150-154.
[4]王波,张海龙,徐丰.薄壁高墩大跨连续刚构桥地震时程反应参数研究[J].公路工程,2007,32(4):28-32.
[5]宋丹,田小红,吴辉科.大跨度刚构桥的行波效应影响分析[J].中南公路工程,2007,32(2):82-85.
[6]丰硕,项贻强,汪劲丰.大跨径连续刚构桥的动力性能及地震响应分析[J].中南公路工程,2005,30(4):77-81.
[7]王建军,秦荣,谢开仲.大跨度钢箱提篮拱桥地震反应的分析方法[J].兰州理工大学学报,2008,34(1):102-105.
[8]谢开仲,秦荣,林海瑛.大跨度CFST拱桥地震反应分析方法研究[J].武汉州理工大学学报(交通科学与工程版),2005,29(5):700-703.
[9]童申家,吴星,李纲.大跨度钢管混凝土拱桥地震行波效应分析[J].桥梁建设,2005,(2):72-75.
[2]曾金艳,李自红,陈文.基岩输入参数对场地地震反应的影响分析[J].西北地震学报,2009,31(2):110-114.
[3]李杰,李娜.基于二维相干性自锚式悬索桥的地震响应研究[J].西北地震学报,2008,30(2):150-154.
[4]王波,张海龙,徐丰.薄壁高墩大跨连续刚构桥地震时程反应参数研究[J].公路工程,2007,32(4):28-32.
[5]宋丹,田小红,吴辉科.大跨度刚构桥的行波效应影响分析[J].中南公路工程,2007,32(2):82-85.
[6]丰硕,项贻强,汪劲丰.大跨径连续刚构桥的动力性能及地震响应分析[J].中南公路工程,2005,30(4):77-81.
[7]王建军,秦荣,谢开仲.大跨度钢箱提篮拱桥地震反应的分析方法[J].兰州理工大学学报,2008,34(1):102-105.
[8]谢开仲,秦荣,林海瑛.大跨度CFST拱桥地震反应分析方法研究[J].武汉州理工大学学报(交通科学与工程版),2005,29(5):700-703.
[9]童申家,吴星,李纲.大跨度钢管混凝土拱桥地震行波效应分析[J].桥梁建设,2005,(2):72-75.
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