近断层地震对跨海双弧形桥塔斜拉桥动力响应研究OA
Study on the Dynamic Response of Cross-sea Double Arc Towers Cable-stayed Bridges by Near Fault Earthquakes
为探究具有双弧形桥塔的跨海斜拉桥脉冲与非脉冲地震动力响应,首先基于Midas/Civil 2019建立了拉索几何非线性的三维空间有限元模型,并分析了结构自振特性;其次,结合桥址处的地震烈度选取了一定数量的脉冲与非脉冲地震动,作为地震响应分析的激励源:最后探究了脉冲与非脉冲地震作用下的结构内力、关键位置位移、拉索应力和应力幅等问题.研究结果表明:脉冲地震作用下的主梁弯矩、桥塔弯矩及剪力均要大于非脉冲地震下的响应值,且在纵向+竖向地震激励下,主梁弯矩…查看全部>>
In order to investigate the pulse and non-pulse seismic dynamic response of a cable-stayed bridge with double curved towers,a 3D spatial finite element model with the geometric nonlinearity of the cables was first estab-lished by Midas/Civil 2019 to analyze the structural natural vibration characteristics;Secondly,based on the seis-mic intensity at the bridge site,a certain number of pulse and non-pulse seismic motions were selected to be the ex-citation sou…查看全部>>
檀朝兴;郭夏
中国市政工程中南设计研究总院有限公司,湖北武汉 430010中国市政工程中南设计研究总院有限公司,湖北武汉 430010
交通运输
双弧形桥塔跨海大桥几何非线性地震响应
double curved bridge towercross sea bridgegeometric nonlinearityseismic response
《市政技术》 2024 (3)
43-50,8
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