【作者】 左程骏； 魏标； 蒋丽忠；

【Author】 ZUO Cheng-jun;WEI Biao;JIANG Li-zhong;Department of Civil Engineering, Central South University;National Engineering Laboratory for High Speed Railway Construction;

【机构】 中南大学土木工程学院； 高速铁路建造技术国家工程实验室；

【摘要】 桥墩扭转刚度在直线梁桥的地震响应简化分析中往往被忽视。针对某高铁连续梁桥进行抗震分析,在Open SEES平台上建立考虑和不考虑桥墩扭转刚度的有限元模型,利用非线性时程分析和易损性分析方法,探讨不同地震攻角下桥墩扭转刚度对桥梁及轨道构件地震易损性的影响。结果表明:地震动沿纵桥向输入时,两者易损性结果无差异;地震动以其他攻角输入时,桥墩扭转刚度对桥梁结构桩基础以外部分的地震响应都有影响,尤其对支座的纵向易损性作用明显。更多还原

【Abstract】 The pier torsion-stiffness is often neglected in the simplified analysis of the seismic response of straight girder bridge. Based on a true continuous girder bridge, the finite element models with and without considering the pier torsion-stiffness are established in Open SEES. Then vulnerability analysis is used to explore the effect of pier torsion-stiffness on seismic vulnerability of bridge and track components under different seismic incident angles. The result indicates that: there is no difference in the vulnerability between the two cases when the ground motion is input along longitudinal direction; however, the pier torsion-stiffness has a significant effect on the seismic response of bridge components(except piles), particularly on the longitudinal vulnerability of the bearings, when the ground motion is input at other seismic angle.更多还原