Numerical Simulation of Seismic Performance of Highway Continuous Beam Bridge Structure
In order to study the seismic characteristics of highway bridges under complex earthquakes,This article takes the Gaowuka No.1 Bridge project as a case study,uses finite element software to analyze the natural vibration characteristics and seismic response time history of the bridge,and puts forward corresponding safety control suggestions.The research results show that:the fundamental frequency of the overall vibration characteristics of the bridge structure is about 0.8 Hz,and the transverse vibration of the upper part of the bridge is more obvious,which will lead to a large transverse displacement of the upper part of the bridge,which needs to be paid attention to.The axial force in the beam gradually increases from left to right,reaches the maximum at Pier No.2 with fixed hinge sup-ports,and then gradually decreases,which is more consistent with the structural characteristics of the bridge itself.The results of re-sponse spectrum analysis are generally larger than those of dynamic time history analysis,and the latter is generally about 78%of the former.The corresponding safety control suggestions are put forward to ensure the seismic requirements of the bridge.
万方数据
维普
