站-桥同位合建工程中地下结构的地震响应OA北大核心CSTPCD
Seismic response of underground structures in subway station-bridge unitized projects
地铁车站与高架桥同位合建(站-桥合建)工程能缓解城市交通拥堵和节约建造空间,但其动力响应机制和地下结构地震反应特性不甚明确.利用有限差分软件建立站-桥合建工况和单一车站工况对应的三维模型,首先进行静力计算,分析两类工况的受力变形规律,在此基础上分析在输入El-Centro波和Kobe波时两类工况中地铁车站的层间位移角、应力变化规律以及薄弱位置;最后深入研究高架桥的桥梁荷载和高度对地铁车站地震反应的影响规律.结果表明:随着基岩输入加速度的增加,高架桥对地铁车站层间位移角和最大应力的影响增大;站-桥合建工况中车站楼板两端容易发生受拉破坏,大震时应增加对车站中柱的关注;层间位移角随桥梁荷载线性增加,随桥梁高度非线性增加,应力随两者均呈线性增加.
The subway stations-bridge unitized(station-bridge unitized)projects can reduce urban traffic congestion and save construction space.But their seismic response mechanism and the seismic response of underground structures are not very clear.3D models of station-bridge unitized condition and single station condition were established using finite difference software.Firstly,static calculations were completed,and the law of force and deformation of two conditions were analyzed.On the basis,with the input of El-Centro and Kobe waves,interlayer displacement angle,stress and weak positions of subway station were analyzed.Finally,the effects of load and height of the bridge on the seismic response of subway station were studied.The results indicate that as the input acceleration of bedrock increases,the effect of the overpass on the interlayer displacement angle and maximum stress of the subway station becomes greater.Tensile damage at the ends of station floors is easier to occur in station-bridge unitized condition,and the middle columns should also be attached equal importance to in strong earthquakes.There is a positive linear correlation between the interlayer displacement angle and bridge load,which can also be observed in bridge height.In addition,stresses increase linearly with bridge load and height.
张胜;郑俊杰;章荣军;杨文钰
华中科技大学土木与水利工程学院,武汉 430074武汉大学土木建筑工程学院,武汉 430072
土木建筑
站-桥合建工程高架桥地铁车站地震响应桥梁特性
subway station-bridge unitized projectoverpasssubway stationseismic responsebridge characteristics
《土木与环境工程学报(中英文)》 2024 (002)
42-50 / 9
国家自然科学基金(52078236) National Natural Science Foundation of China(No.52078236)
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