中南大学学报（自然科学版）2011，Vol.42Issue(1)：184-191,8.
地震作用对钢桁梁桥车桥系统耦合振动的影响分析
Coupled vibration of train-bridge system of steel truss bridge with seismic effect
摘要
Abstract
In order to study the effect of coupling vibration of train-bridge system on earthquake response, using the least squares method to correct and fit the seismic acceleration, the drift phenomenon of displacement time histories caused by the direct integration of acceleration time history was eliminated. In addition, according to the principle of total potential energy with stationary value in elastic system dynamics and the “set in fight position” rule for formulating system matrixes, and taking the track irregularities as system's self-excitation source with the seismic as external excitation, the coupling vibration equation of train-bridge system considering the seismic excitation was built up. Taking a steel truss girder as an example and using the computer simulation method to establish the dynamic model of train-bridge system,the effect of coupling vibration of train-bridge system on earthquake response was researched. The results show that the dynamic response of the bridge depends primarily on the size of the earthquake, the transverse seismic wave has important impact on the transverse dynamic response of vehicles and bridges, the vertical seismic wave has a major impact on the vertical vibration of the vehicle-bridge system but with little effect on the transverse vibration. However,the influence of the vertical seismic wave on the derailment coefficient, the load decrement rate of wheel mass and the vertical acceleration are so significant that the impact of vertical seismic wave in judging the safety of trains must be considered.关键词
钢桁梁桥/地震加速度/漂移现象/耦合振动/有限元模型/动力响应分类
交通工程引用本文复制引用
邓子铭,郭向荣,张志勇..地震作用对钢桁梁桥车桥系统耦合振动的影响分析[J].中南大学学报（自然科学版）,2011,42(1):184-191,8.基金项目
铁道部科技发展计划项目(2009GD029) （2009GD029）
