摘要
为了研究行波效应对大跨度悬索桥梁轨系统地震响应的影响,基于多点激励的大质量法,以公铁两用悬索桥——五峰山长江大桥为工程背景,采用ANSYS软件建立了梁轨一体化动力计算空间模型。结果表明:相比于一致激励,在低视波速区间悬索桥轨道与桥梁的地震响应变化较大,在高视波速区间变化不大且行波效应对主桥钢轨应力的增加尤为明显;行波效应会使不同侧对称位置处桥梁的地震响应出现滞后现象。
In order to research on the influence of traveling wave effect on the seismic response of track-bridge system of a large-span suspension bridge,based on the large mass method with multi-point excitation,and taking the dual-purpose suspension bridge-Wufengshan Yangtze River Bridge as the engineering background,a spatial model of track-bridge integrated dynamic calculation is established by ANSYS.The results shows that compared with the uniform excitation,the seismic response of the track and bridge of the suspension bridge varies greatly in the low apparent wave speed interval,but not much in the high apparent wave speed interval,and the traveling wave effect increases the stress of the rail of the main bridge especially;the traveling wave effect causes the hysteresis phenomenon of the seismic response of the bridge at the different side symmetric positions.
作者
王楚皓
WANG Chuhao(China Railway Design Corporation,Tianjin 300308,China)
出处
《天津建设科技》
2025年第1期8-12,共5页
Tianjin Construction Science and Technology
关键词
公铁两用悬索桥铁
多点激励
大质量法
行波效应
梁轨相互作用
地震响应
high-rail suspension bridge
multi-point excitation
large mass method
travelling wave effect
trackbridge interaction
seismic response
