【摘要】 文章以某互通立交匝道工程为背景,运用大型结构分析程序Midas/Civil,针对曲线梁桥的特点建立空间有限元模型,采用动态时程分析法对其进行地震反应分析,研究曲线梁桥的水平和竖向最不利地震反应。结果表明,曲线梁桥支座中心连线方向和平面内与之垂直的方向为最不利的水平地震输入角度,竖向地震分量会引起桥梁内力的明显变化,并且是不能忽略的,尤其是墩顶处,在桥梁抗震设计时必须要谨慎。更多还原

【Abstract】 In this paper,based on an interchange ramp project and by using large-scale structural analysis program Midas/Civil,a finite element model is built in view of the particularity of curved beam bridge.The dynamic time history analysis method is used to study the critical seismic response of curved beam bridge with horizontal and vertical actions.The results indicate that the center of bridge bearing and the vertical direction are the worst-case input directions of horizontal seismic shock.The vertical seismic action can cause the obvious change of the inner force of bridge,and its influence can not be ignored especially in the pier top,which should be cautiously treated in the seismic design.更多还原