某高速铁路钢-混连续结合梁桥车桥动力响应分析  

VEHICLE-BRIDGE DYNAMIC RESPONSE ANALYSIS OF A STEEL-CONCRETE CONTINUOUS COMPOSITE BRIDGE UNDER HIGH-SPEED TRAIN LOADING

作　　者：侯忠明[1,2] 夏禾 李运生[4] 孟海 HOU Zhongming;XIA He;LI Yunsheng;MENG Hai(Central Research Institute of Building and Construction Co.,Ltd.,MCC Group,Beijing 100088,China;National Testing Center for Quality and Security Supervision of Industrial Building,Beijing 100088,China;School of Civil Engineering,Beijing Jiaotong University,Beijing 100044,China;School of Civil Engineering,Shijiazhuang Tiedao University,Shijiazhuang 050043,China)

机构地区：[1]中冶建筑研究总院有限公司,北京100088 [2]国家工业建构筑物质量安全监督检验中心,北京100088 [3]北京交通大学土木建筑工程学院,北京100044 [4]石家庄铁道大学土木工程学院,石家庄050043

出　　处：《钢结构（中英文）》2019年第12期82-87,共6页Steel Construction（Chinese & English）

基　　金：国家自然科学基金项目(51778377);河北省自然科学基金面上项目(E2018210149)。

摘　　要：考虑栓钉连接件的柔性,针对一座3跨钢-混凝土铁路连续结合梁实桥建立有限元模型,对其自振特性进行分析,并与试验结果进行对比。经研究发现:柔性栓钉连接件所引起的滑移对结合梁的动力响应有重要影响。基于上述分析,进行了高速列车荷载作用下结合梁动力响应分析,计算了桥梁和车辆的各种动力指标的最大值:包括冲击系数、桥梁的竖向和横向动位移及动加速度、机车和车辆的脱轨系数、轮重减载率、横向和竖向加速度及横向和竖向平稳性指标(Sperling指标),并与实测结果进行了对比,结果吻合较好。Considering the flexibility of the headed studs, the natural vibration characteristics of a three-span railway steel-concrete continuous composite beam were studied by FEA method, and compared with the experimental results. It was found that the interface slip caused by the flexible connector had a significant effect on the dynamic response. Based on modal synthesis method, the dynamic response analysis of the composite bridge under high-speed train loading was carried out, and the maximum values of the dynamic index for the bridge and vehicles were calculated, such as impact coefficient, vertical and lateral dynamic displacement and acceleration, derailment coefficient, rate of wheel load reduction, lateral and vertical acceleration, and Sperling comfort index of the locomotives and vehicles, which were compared with the test results and showing were in accordance with the test results.

关 键 词：钢-混结合梁桥 界面滑移 车桥动力耦合 动力分析 

分 类 号：U441.3[建筑科学—桥梁与隧道工程] U270.11[交通运输工程—道路与铁道工程]