摘要
基于经典结构动力学公式推导出位移时程反应方程,采用有限元软件Ansys建立某斜拉桥空间有限元模型,分析其在地震作用下的位移响应。结果表明:在多维随机地震激励下,竖向激励使桥梁纵向位移明显减小,但对竖向位移没有影响,斜拉桥设计时需要考虑多维地震激励下的响应。
In this paper,the authors develop displacement time-history response equation based on the classical structural dynamic formula.A 3D finite element model for a cable-stayed bridge is constructed to analyze the dispalacement respone under seismic.The study shows the influence of vertical force on bridge longitudinal displacement is reduced obviously while it does not exist in vertical displacement under multi-component seismic excitation.Consequently,the influence of multi-component seismic excitation should be considered for the design of cable-stayed bridge.
出处
《西华大学学报（自然科学版）》
CAS
2012年第3期105-108,共4页
Journal of Xihua University:Natural Science Edition
基金
国家自然科学基金项目(50879097)
重庆市国土局项目
关键词
斜拉桥
多维激励
地震响应
时程分析
cable-stayed bridge
mutli-component excitation
seismic respone
time-history analysis
