考虑行波效应的大跨度连续刚构桥地震响应分析

Seismic response analysis for long-span continuous rigid-framed bridges under excitation of traveling waves

为研究大跨度连续刚构桥地震响应特性,基于考虑行波效应的多点激励时程分析方法,以涪江三桥为研究对象,应用ANSYS有限元软件对其进行了地震响应分析,并与一致地震激励下的计算结果进行了比较。研究结果表明,行波效应对该类连续刚构桥桥墩的抗震设计是有利的,对主梁则会产生不利影响。

To investigate the seismic response characteristic of continuous rigid-frame bridge, based on the methods of multi point excitation seismic response analysis for long-span bridges considering traveling wave effect, taking Fujiang sanqiao as the research object,by using finite element software ANSYS, it＇s seismic responses is numerically simulated considering traveling wave effect and compared with the result under the coincident earthquake excitation. The results show that traveling wave effect on seismic design of piers of the continuous rigid-frame bridge is advantageous, but it has a negative impact on the main beam.