摘要
利用OpenSees地震仿真模拟平台,建立了3×30m斜交简支梁桥计算模型,通过改变斜度、纵向伸缩缝间隙、梁体与横向挡块间初始间隙,研究结构地震碰撞反应的变化规律,研究发现:桥面峰值转角随斜度和伸缩缝间隙增大呈现先增大后减小的变化规律,随横向初始间隙增大而逐渐增大;梁体纵向最大位移随斜度和伸缩缝间隙增大而逐渐增大,随横向初始间隙增大呈现先减小后增大的变化规律;墩底最大反力和墩顶顺桥向最大位移的变化规律与梁体纵向最大位移的变化规律一致.
A dynamic calculation model of 3 × 30m skewed simply supported girder bridge is established by u- sing the software OpenSees. The variations of structure under seismic collision response is studied by chan- ging the skew angle, initial gap at expansion joint and initial gap between girder. The results indicate that the peak angle of the deck increases firstly and then decreases with the increase of the skew angle and initial gap at expansion joint, but increases with the increase of initial gap between girder~ the maximum longitudinal dis- placement of the girder increases with the increase of the skew angle and initial gap at expansion joint, but de- creases firstly and then increases with the increase of initial gap between girder; the variations of the maxi- mum reverse force and the maximum displacement of pier top along the bridge have the same variations with the longitudinal displacement of the girder.
出处
《三峡大学学报（自然科学版）》
CAS
2016年第4期46-50,共5页
Journal of China Three Gorges University：Natural Sciences
基金
河北省自然科学基金项目(E2015210038)
国家青年科学基金项目(51508347)
关键词
斜交桥
简支梁
地震碰撞
参数分析
skewed bridge
simply supported girder
seismic collision
parametric analysis
