一种基于桥梁变形后构形的车辆—柔性桥梁竖向耦合模型

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振动与冲击 ›› 2013, Vol. 32 ›› Issue (3) : 157-162.

论文

一种基于桥梁变形后构形的车辆—柔性桥梁竖向耦合模型

肖祥1,2，任伟新1,2

作者信息 +

A kind of vehicle-flexible bridge vertical interaction model based on deformed configuration

XIAO Xiang1,2, REN Wei-xin1,2

Author information +

文章历史 +

摘要

基于车—桥振动桥梁变形后的构形，建立了考虑桥梁变形的车—桥耦合模型。类似于结构抗震分析中，将地震作用下结构的动位移分解为拟静力位移和结构动位移，本文将车辆的运动分解为整体顺着桥面运行和相对自身局部系统的振动。以单轴车辆—简支梁桥为例，建立了基于桥梁变形后构形的车—桥系统竖向振动方程。最后，通过简支梁数值算例对由于桥梁变形产生的附加力进行了分析和研究。

Abstract

Based on the deformed configuration of bridge with vehicle-bridge vibration, a vehicle-bridge interacted model which considers the deformation of bridge is established. Movement of vehicle is decomposed to rigid motion along the bridge deck and the vibration in local vehicle system, just like the seismic analysis of bridges. Taking simply supported bridge subjected to a one-axle vehicle for example, the vertical motion equation of vehicle-bridge system is established, which can better reflect the operation characteristics of vehicles running on the bridge. The numerical example about the effect of bridge deformation was give out, and analysis of the effect of deflection-span ratio and vehicle speed has been studied.

导出引用

肖祥;任伟新;. 一种基于桥梁变形后构形的车辆—柔性桥梁竖向耦合模型[J]. 振动与冲击, 2013, 32(3): 157-162

XIAO Xiang; REN Wei-xin;. A kind of vehicle-flexible bridge vertical interaction model based on deformed configuration[J]. Journal of Vibration and Shock, 2013, 32(3): 157-162