合肥西站承轨层结构抗震关键技术研究

Key seismic technology research on the rail bearing floor in he fei west railway station

第四代铁路客站合肥西站承轨层结构采用桥建合一混合结构体系,具有梁柱节点构造复杂、动力荷载状态多、结构超长、抗震性能目标高等特点。本文介绍了承轨层型钢混凝土柱与预应力混凝土箱形梁关键节点方案,通过运用车桥耦合分析方法对承轨结构在运行速度120km/h运行客运及货运列车时进行了振动分析,结合温度作用分析验算了桩基础抗水平承载力,最后采用弹塑性分析软件SAUSAGE下进行了承轨层结构大震弹塑性分析,分析结果表明合肥西站承轨层结构结构体系合理、结构舒适度满足规范限值、抗震性能良好。

As one of the fourth generation railway stations, HeFei-West railway station’s rail bearing floor adopts the bridge-building hybrid structure system.It has the characteristics of complex beam-column joints, multiple dynamic load states, super-long structure and high seismic performance objectives.In this paper, the key node solution is proposed for the steel reinforced concrete column and the prestressed concrete box beam, the vibration analysis of the rail bearing floor is carried out when the passenger and freight trains run at the speed of 120 km/h by using the vehicle-bridge coupling analysis method.The design of the foundation considering the temperature effect is checked to meet the requirements of the horizontal bearing capacity. Finally, the large earthquake elastic-plastic analysis is carried out by SAUSAGE software.The analysis result shows that the structural system of the rail bearing floor of HeFei-West railway station is reasonable, the structural comfort level meets the specification limit, and the seismic performance is good.