桥墩刚度对铁路大跨连续梁桥车桥耦合振动的影响研究  

Study on the Influence of Pier Stiffness on Vehicle-bridge Coupled Vibration of Long-span Continuous Girder Bridge of Railway

作　　者：周川江 徐昕宇 郑晓龙[1] 陈星宇 ZHOU Chuanjiang;XU Xinyu;ZHENG Xiaolong;CHEN Xingyu(China Railway Eryuan Engineering Group Co.,Ltd.,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：《高速铁路技术》2022年第6期23-29,共7页High Speed Railway Technology

摘　　要：为研究桥墩刚度对高墩大跨连续梁桥的影响,本文以某高墩大跨铁路桥梁为背景,采用MSC Patran和ADAMS Rail软件联合仿真技术,对桥梁进行了车桥系统耦合振动分析,研究了桥墩横向刚度和桥墩高差对车辆和桥梁动力响应的影响,结果表明:(1)当桥墩横向刚度与原有刚度的比值在0.6~1.4范围内变化时,桥梁的横向动力响应变化不大,当桥墩横向刚度与原有刚度的比值由0.6降至0.2时,桥梁横向动力响应缓慢增大,当桥墩横向刚度与原有刚度的比值降低至0.2以下时,桥梁的横向动力响应急剧增大;(2)车辆动力性能受桥墩横向刚度变化的影响不大;(3)随着桥墩高差的增大,桥梁的跨中横向位移明显减小,列车和桥梁的其他动力响应指标的变化不大。In order to study the influence of pier stiffness on high-pier long-span continuous girder bridges,this paper,based on a high-pier long-span railway bridge,analyzes the vehicle-bridge coupled vibration and studies the influence of transverse stiffness and height difference of piers on dynamic response of vehicle and bridge by using MSC Patran and ADAMS Rail software joint simulation technology. The results show that:(1)When the ratio of the transverse stiffness of the pier to the original stiffness changes within the range of 0.6~1.4,the transverse dynamic response of the bridge changes little. When the ratio decreases from 0.6 to 0.2,the transverse dynamic response of the bridge increases slowly. When the ratio decreases to below 0.2,the transverse dynamic response of the bridge increases sharply.(2)The dynamic performance of vehicle is not greatly affected by the change of transverse stiffness of the pier.(3)With the increase of height difference of piers,the mid-span transverse displacement of the bridge decreases obviously,while other dynamic response indicators of vehicle and bridge change little.

关 键 词：铁路桥梁 桥墩刚度 数值计算 大跨度连续梁桥 动力响应 

分 类 号：U441.3[建筑科学—桥梁与隧道工程]