近场地震下简支梁桥的碰撞响应研究

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英文篇名：Study on Impact Response of Bridges with Simply-supported Beams under Near-field Earthquake 中文刊名：广东公路交通 英文刊名：Guangdong Highway Communications 作者：林华东 ; 王强 英文作者：LIN Hua-dong1 ; WANG Qiang2(Guangdong Communication Group Testing Center ; Guangzhou 510800 ; China) 中文关键词：近场地震 ; 简支梁 ; 碰撞 ; 固定支座 英文关键词：near-fault earthquake ; simple supported bridge ; pounding ; fixed pin bearing 出版日期：2008-12-30 机构：广东交通集团检测中心; 年：2008 期：04 出版单位：广东公路交通

摘要

近场地面运动有显著的改变结构响应的特点,使结构产生较大的内力和位移。由于简支梁桥存在着梁体伸缩缝,在近场地震作用下因相邻两跨梁之间或是梁与桥台之间运动的不协调导致发生碰撞,这种碰撞现象可能会造成梁体的脱落。研究了碰撞现象对桥梁结构产生的不利影响,认为对固定铰支座的影响很大,在支座设计时应予重视。
The neat-fault ground motion can dramatically influence response characteristic of the structures.And it can increase the internal force and the displacement of the structures.Because simple supported beam bridges have the expansion joints,the pounding will happen between adjacent beams or beams and abutment.And the pounding can cause beams falling.In this paper,the effect caused by pounding to the bridges was studied.The conclusion was draw that the pounding between two decks have heavy influence on the fixed pin bearings.This fact had not been noticed for a long time in the bridges designing.

引文

[1]王东升,冯启民,凌贤长.桥梁非线性地震反应分析若干问题研究现状[J].地震工程与工程振动,2002,22(1):61~66.
    [2]Sang-Hyo Kim,Sang-Woo Lee,Ho-SeongMha.Dynamic behaviors of the bridge considering poundingand friction effects under seismic excitations[J].StructuralEngineering and Mechanics,2000,10(6):621~633.
    [3]Robert Jamkowski,Kezysztof Wilde,Yozo Fujino.Pounding of superstructure segments in isolated elevated bridgeduring earthquakes[J].Earthquake Engineering and Structur-al Dynamics,1998,27:487~502.
    [4]铁道部专业设计院.混凝土桥[M].北京:中国铁道出版社,1998.