基于双曲面球型减隔震支座的铁路简支梁桥桥墩地震损伤分析  

Seismic damage analysis of simply-supported railway bridge piers based on double spherical seismic isolation bearings

作　　者：许敏[1] 魏标[2,4] 刘义伟 张伦 李姗姗 颜璐[2,4] XU Min;WEI Biao;LIU Yiwei;ZHANG Lun;LI Shanshan;YAN Lu(China Railway Eryuan Engineering Group Co.Ltd,Chengdu 610031,China;School of Civil Engineering,Central South University,Changsha 410075,China;Communications Design&Research Institute Co.Ltd.of Jiangxi Province,Nanchang 330052,China;National Engineering Laboratory for High Speed Railway Construction,Changsha 410075,China;Chengdu-Lanzhou Railway Co.Ltd,Chengdu 610032,China;School of Intelligent Manufacturing,Jiangsu Vocational Institute of Architectural Technology,Xuzhou 221116,China)

机构地区：[1]中铁二院工程集团有限责任公司,四川成都610031 [2]中南大学土木工程学院,湖南长沙410075 [3]江西省交通设计研究院有限责任公司,江西南昌330052 [4]高速铁路建造技术国家工程实验室,湖南长沙410075 [5]成兰铁路有限责任公司,四川成都610032 [6]江苏建筑职业技术学院智能制造学院,江苏徐州221116

出　　处：《铁道科学与工程学报》2020年第7期1769-1777,共9页Journal of Railway Science and Engineering

基　　金：四川省科技计划资助项目(2019YFG0048);国家自然科学基金资助项目(51778635,51778630);湖南省自然科学基金资助项目(2019JJ40386);江苏省住房和城乡建设厅资助项目(2017ZD012);高烈度地震区(成兰)铁路桥墩抗震综合试验专题(CLRQT-2015-010)。

摘　　要：由于双曲面球型减隔震支座作为一种新型支座在铁路桥梁中应用较少,采用ABAQUS软件建立8 m及25 m墩高的铁路简支梁桥有限元模型,研究双曲面球型减隔震支座减少桥墩地震损伤的效果,并对数值仿真结果进行振动台试验验证。研究结果表明:双曲面球型减隔震支座减少铁路简支梁桥桥墩地震损伤的能力远大于普通球型支座,且在大多数情况下能有效防止桥墩进入屈服状态;采用双曲面球型减隔震支座时,8 m墩的地震损伤减少的效果明显好于25 m墩,且25 m墩在高烈度地震作用下屈服的可能性较高。As a new type of bearing,the application of double spherical seismic isolation(DSSI)bearing in railway bridges is relatively few.The finite element models of simply-supported railway bridge with 8 m and 25 m piers were established by using ABAQUS software,and the effects of DSSI bearings on reducing the pier seismic damage were studied.Finally,the numerical analysis results were validated by the shaking table tests.The results show that when compared with ordinary spherical bearing,DSSI bearing can significantly reduce the seismic damage range and degree of simply-supported railway bridge piers,and effectively prevent the piers from reaching a yield stage in most cases.The effects of DSSI bearings on reducing the seismic damage of 8 m pier are better than that of 25 m pier,and the 25 m pier has a high possibility of reaching a yield stage under high intensity earthquakes.

关 键 词：双曲面球型支座 铁路简支梁桥 减隔震 非线性时程 地震损伤 

分 类 号：U24[交通运输工程—道路与铁道工程]