高铁站房雨棚车致动力响应仿真分析

Simulation Analysis of Train-Induced Dynamic Response of High-Speed Railway Station Canopy

摘要: 为探究列车车速对“桥建合一”高铁站房雨棚结构车致动力响应的影响，本文以某典型高铁站房雨棚结构为对象，结合车桥耦合动力学与模态综合法建立了其1:15缩尺仿真分析模型，探究了30~60 km/h车速(原型车速170~250 km/h)下雨棚边缘、中部动力响应分析。结果表明：雨棚各测点位移响应随车增速持续增大，跨中位移均大于端部且差值逐步增加；边缘测点冲击系数随车增速整体上升，中部测点呈上升趋势，二者冲击系数最大值均出现在端部且增幅显著大于跨中。

Abstract: To investigate the influence of train speed on the train-induced dynamic response of the canopy structure in an integrated bridge-station high-speed railway station, this study takes a typical station canopy as the research object. A 1:15 scaled simulation model was established by combining vehicle-bridge coupled dynamics with the mode superposition method, and the dynamic responses at the edge and middle of the canopy were analyzed under train speeds of 30~60 km/h, corresponding to prototype speeds of 170~250 km/h. The results show that the displacement responses at all monitoring points of the canopy increase continuously with train speed. The mid-span displacement is consistently greater than that at the ends, and the difference gradually enlarges. The impact coefficient at the edge monitoring points generally increases with train speed, while that at the middle monitoring points also shows an increasing trend. For both regions, the maximum impact coefficient occurs at the ends, and its growth is significantly greater than that at mid-span.