车辆对钢筋混凝土拱桥的冲击效应简化分析方法研究

摘要

Considering mechanical characteristics and safety,the arch bridge of Reinforced con-crete is the preferred type of low grade road in the mountainous area conditions across the valley.vehicle will have a greater impact on the arc bridge,The Engineer of bridge design is often used in the dynamic magnification factor (impact factor)simulation this greater impact effect.But because the coupling vibra-tion of vehicle-bridge,bridge deck irregularities and other reasons,the vehicle impact effect on rein-forced concrete arch bridge analysis process is very complex.Based on some simplifying assumptions,the calculation become more simple,to the general engineering and technical personnel of the grasp and ap-plication.Through the simulation example,the simplified analysis method presented in this paper has certain rationality,can be used to estimate the vehicle impact effect on reinforced concrete arch bridge.%考虑受力特点和安全性，钢筋混凝土拱桥是低等级公路在山区条件下跨越沟谷的首选桥型。车辆在拱桥上运行过程中会对结构产生较大的冲击，设计中常常用动力放大系数（冲击系数）进行模拟计算。但由于车桥耦合振动、桥面不平顺等原因，车辆对钢筋混凝土拱桥的冲击效应分析过程十分复杂。基于一些简化假设，使得冲击响应计算变得较为简单，能够为一般工程技术人员所掌握并应用。通过工程实例的模拟计算表明，提出的简化分析方法合理可行，可以用来估算车辆对钢筋混凝土拱桥的冲击效应。