桥建合一玻璃幕墙结构动力特性仿真分析

高速铁路客运站房大型幕墙是一种桥建合一的结构体系,由于玻璃幕墙体系与列车轨道梁紧密相联,高速列车通过时可能引起玻璃幕墙共振的问题。因此,在设计幕墙结构体系时,行车振动对玻璃幕墙结构体系的影响必须予以考虑。以某高速铁路站房玻璃幕墙结构为研究对象,运用有限元方法进行数值动力仿真分析,分析结果表明:行车振动荷载不会使幕墙结构产生共振;双边列车通行相比单边列车通行,幕墙结构产生的平面外振动位移要大;当行车振动荷载激振方式为竖向力激振时,竖向激振荷载作用下幕墙结构的平面外振动位移很小。

Simulation Analysis of Dynamic Characteristics of Glass Curtain Wall of Bridge-building Integration Structure

The large curtain wall in high-speed railway station is a bridge-building integration structure.As the curtain wall and the track girder are closely connected,the passing of high-speed train through the station may cause structure resonance.Therefore,effect of the vibration generated by the passing train on the curtain wall structure shall be considered in the design of process.This paper employs the finite element simulation to analyze the vibration behavior of steel structure of the large curtain wall in highspeed railway station.The analyses results show that the train vibration load will not cause structural resonance of the curtain wall,the out-of-plane displacement of the curtain structure caused by bilateral vibration excitation is larger than that by unilateral vibration excitation.The out-of-plane displacement of the curtain structure caused by in-plane vertical vibration excitation is small.