摘要
多跨连续梁桥由于其纵向延伸较大以及桥墩数量较多,在地震波作用分析时应考虑行波效应选择多点激励.以某座13跨预应力连续梁桥为例,运用有限元分析软件midas建立有限元模型,考虑行波效应采用多点激励,运用时程分析方法分析多跨连续梁桥的地震响应,并与一致激励作用下的结果对比.结果表明:非一致激励作用下的结果比一致激励作用下的结果大,并且随着波速的增大,桥梁的地震反应逐渐变小.
With relatively large extension and many bridge piers,seismic response analysis for multi-span continuous bridges should be under asynchronous excitations.Taking the 13-span priestes-ses continuous girder bridge as an example,a FEA model is established through the software MI-DAS.Using multi-point excitation in wave-passage effect,the response of multi-span contin-uous bridges with the dynamic time-history is analyzed and compared with the results of the uniform seismic excitation.The results show that,the results of asynchronous excitation is larger than those of the uniform seismic excitation and the seismic response of the bridge is reduced gradually with the increase of the velocity.
出处
《河北建筑工程学院学报》
CAS
2014年第1期32-34,42,共4页
Journal of Hebei Institute of Architecture and Civil Engineering
关键词
多跨连续梁
非一致激励
地震反应分析
行波效应
multi-span continuous bridges
asynchronous excitations
seismic response analysis
wave-passage effect
