城市轨道交通桥梁设计的横向摇摆力与脱轨状态检算

Lateral Oscillation Force on the Bridges in Design of UMT and Assessment of Derailment

根据铁路车辆及上海轨道交通 3号线上实测车辆横向加速度值 ,建议横向摇摆力取轴重的 10 %。按目前承轨台构造 ,车辆偶然脱轨后可能横向偏移左右各 1.75m。建议按偶然荷载状态检验桥面板强度及单线桥梁 (包括墩身 )的整体稳定性。

Based on the analysis of the lateral acceleration data of vehicles measured in Shanghai Metro Line3,this paper suggests that the lateral oscillation force of the vehicles shall choose 10% of the vertical load on a single wheel.Since the lateral offset of the derailed vehicles may reach 1.75 m on both sides of the rail,it is recommended that the strength of the bridge plates and stability of the whole structures of the single-line bridges (including piers) be tested in the incidentally loaded status of the bridges.