铁路连续梁拱组合桥基于摩擦摆支座的减隔震研究

英文篇名：Seismic Isolation of Combined System of Continuous Girder-arch Railway Bridge Using Friction Pendulum Bearing
中文刊名：西北地震学报
英文刊名：Northwestern Seismological Journal
作者：夏修身
英文作者：XIA Xiu-shen(School of Civil Engineering ; Lanzhou Jiaotong University ; Lanzhou 730070 ; China)
中文关键词：铁路 ; 连续梁拱组合体系桥梁 ; 摩擦摆支座 ; 隔震
英文关键词：Railway ; Combined system of continuous girder-arch bridge ; Friction pendulum bearing ; Seismic isolation
出版日期：2012-12-30
机构：兰州交通大学土木工程学院;
年：2012
期：04
出版单位：西北地震学报

摘要

研究了铁路连续梁拱组合体系桥梁的支座减、隔震设计。针对该桥梁的特点提出了摩擦摆支座减、隔震设计的原则与方法;建立全桥计算模型,采用非线性时程分析方法重点分析了摩擦摆支座的减、隔震效果。结果表明,采用摩擦摆支座可以显著地减小结构顺桥向的最大地震弯矩及拱顶变形,横桥向的减、隔震效果受输入地震动的影响很大。
The seismic isolation of combined system of continuous girder-arch railway bridge is studied with friction pendulum bearing(FPB).Based on the characteristics of the system,the design principles and methods for seismic isolation of combined system using FPB is proposed.The nonlinear time history analysis method is used for the analysis of isolation effect.The results show the maximum seismic moment and deformation of the vault can be significantly reduced by using FPB in longitudinal direction.The reduction of isolation is greatly influenced by input ground motion in transverse direction.

引文

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