双曲面球型减隔震支座与普通支座在成昆铁路典型桥梁上的抗震性能对比分析  

COMPARATIVE ANALYSIS OF SEISMIC PERFORMANCE OF DOUBLE SPHERICAL ASEISMIC BEARING AND GENERAL BEARING ON TYPICAL BRIDGES IN CHENGDU-KUNMING RAILWAY

作　　者：缪庆华 宋晓东[1] 谢海清[1] MIAO Qinghua;SONG Xiaodong;XIE Haiqing(China Railway Eryuan Engineering Group Company Limited,Chengdu 610031,China)

机构地区：[1]中铁二院工程集团有限责任公司,成都610031

出　　处：《力学与实践》2024年第2期393-400,共8页Mechanics in Engineering

基　　金：四川省科技计划项目(2020JDJQ0078)资助。

摘　　要：以成昆铁路典型桥梁为研究背景,讨论了双曲面球形减隔震支座的抗震性能,对比分析了不同桥型对减隔震效果的影响。进一步地,讨论了桥墩的高度、形式以及位置对减隔震效率的影响。结果表明,双曲面球形减隔震支座对于简支T梁桥、简支桁架梁桥以及连续梁桥均有良好的减隔震效果。整体而言,双曲面球形减隔震支座对墩顶的载荷优化大于墩底,对弯矩的优化大于剪力;桥墩墩高、桥墩位置以及桥墩形式都会影响抗震支座的减隔震率。Taking typical bridges on the Chengdu-Kunming Railway as the research background,the seismic performance of double spherical aseismic bearing was investigated.A comparative analysis of the influence of different bridge types on the effectiveness of base isolation was conducted.Furthermore,the effects of pier height,form,and location on the efficiency was discussed.The results indicate that double spherical aseismic bearing exhibit good seismic isolation effects for simply supported T-beam bridges,simply supported truss bridges,and continuous beam bridges.Overall,the optimization of loads on the top of piers is more significant than at the bottom,and the optimization of moments is more significant than shear forces.Pier height,pier location,and pier form all affect the bearing's seismic isolation efficiency.

关 键 词：成昆铁路 桥梁抗震分析 双曲面球形减隔震支座 数值模拟 对比分析 

分 类 号：U24[交通运输工程—道路与铁道工程]