列车制动力对大跨度铁路斜拉桥地震响应影响  

Influence of train braking force on seismic response of long-span railway cable-stayed bridges

作　　者：吕龙[1] 薛小强[1] LV Long;XUE Xiaoqiang(College of Environment and Civil Engineering,Chengdu University of Technology,Chengdu 610059,China)

机构地区：[1]成都理工大学环境与土木工程学院,四川成都610059

出　　处：《地震工程与工程振动》2018年第4期180-185,共6页Earthquake Engineering and Engineering Dynamics

基　　金：四川省教育厅科研项目(18ZB0071);成都理工大学科研启动基金(10900-KYQD-06455)~~

摘　　要：以一大跨度铁路斜拉桥为背景,根据高速列车制动模型,获得列车制动力,采用动力时程分析方法,分析列车制动力和地震共同作用及地震单独作用下斜拉桥结构响应,在此基础上,研究列车制动力作用对结构地震响应影响。结果表明,列车制动力作用对地震作用下梁端和塔顶位移影响较塔底剪力和弯矩大。当不设置黏滞阻尼器时,列车制动力对结构地震响应影响不显著;设置黏滞阻尼器后,列车制动力对梁端位移影响显著。Based on a long-span railway cable-stayed bridge,the train braking forces were obtained by high speed train braking model. Dynamic responses of structure were analyzed under train braking and seismic loads,seismic loads according to dynamic time history analysis method,respectively. Based on this,the influence of train braking force on seismic response of the bridge was investigated. The results show that the effect of train braking force on the displacement of the beam and the top of the tower is greater than that of the shear force and the bending moment at the bottom of the tower. The influence of the train braking force on the seismic response of the bridge without connection systems between the beam and the tower is slight and that on the displacement of the beam of the bridge with viscous dampers is significant.

关 键 词：大跨度铁路斜拉桥 动力时程分析法 地震响应 列车制动力 黏滞阻尼器 

分 类 号：U448.121[建筑科学—桥梁与隧道工程]