新型柱板式高墩大跨度刚构桥车-桥耦合振动影响因素分析  

Analysis on the influence factors of the vehicle-bridge coupling vibration of a new-type high-pier of long span rigid frame bridge with column plate structure

作　　者：陈敦[1,2,3] 王根会[3] 赵雪松 李磊[5] 

机构地区：[1]中国科学院寒旱区环境与工程研究所冻土工程国家重点实验室,甘肃兰州730000 [2]中国科学院大学,北京100049 [3]兰州交通大学土木工程学院,甘肃兰州730070 [4]达州市城乡规划局,四川达州635000 [5]兰州铁路局兰州西工务段,甘肃兰州730030

出　　处：《兰州理工大学学报》2016年第1期133-138,共6页Journal of Lanzhou University of Technology

摘　　要：以黄韩侯铁路线纵目沟特大桥为工程背景,建立车辆动力模型、桥梁有限元模型并考虑轮轨关系,以蛇形运动和轨道不平顺作为系统的自激激励源,利用大型有限元软件ANSYS以及UM动力学分析软件联合进行仿真分析.探讨桥梁结构刚度、行车速度、轨道不平顺以及货车编组情况等因素对新型柱板式高墩大跨度刚构桥梁车-桥耦合系统的影响.研究表明:桥梁横向刚度的减小对车-桥耦合系统的横向振动影响比较明显,对其竖向振动影响较小;桥梁竖向刚度的改变对车-桥耦合系统的竖向振动影响较为显著,对其横向振动影响较小;轨道不平顺的增加将导致车-桥耦合系统振动明显加剧;空载货车的横向稳定性较重载货车的弱,易发生脱轨事故.Taking the extra-large bridge project at Zongmu ditch on Huanghanhou railway line as engineering background, the vehicle dynamic model and bridge finite element model are established, where the wheel-rail relationship is taken into account. Taking the serpentine movement and track irregularity as system self excitation source, the simulation analysis of the bridge vibration is carried out by using finite element software ANSYS combined with kinetic analysis software UM. The effect of a series of factors such as bridge structure stiffness, train speed, track irregularity, and freight car marshalling on the vehi- cle-bridge coupling system of column-plate high-pier and long span rigid frame bridge is explored. The investigation result shows that the decrease of bridge transverse stiffness has a remarkable effect on the lateral vibration of vehicle-bridge coupled system but a little influence on its vertical vibration. Bridge vertical stiffness change has an obvious effect on its vertical vibration but a little influence on its lateral vibration. The increase of track irregularity leading to its strong vibration. The lateral stability of idling freight is worse than that of heavy one and the derailment accident is easy to take place.

关 键 词：大跨度刚构桥梁 车-桥耦合 影响因素分析 数值仿真 

分 类 号：TU311.3[建筑科学—结构工程] U441.3[建筑科学—桥梁与隧道工程]