高速铁路列车制动力对简支梁桥地震碰撞效应影响研究

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振动与冲击 ›› 2014, Vol. 33 ›› Issue (15) : 167-173.

论文

高速铁路列车制动力对简支梁桥地震碰撞效应影响研究

杨孟刚1，潘增光1,2

作者信息 +

Research on pounding effect induced by earthquake for high-speed railway simply supported bridge subjected to train braking force

YANG Meng-gang1, PAN Zeng-guang1,2

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摘要

以高速铁路三跨简支梁桥为例，采用ANSYS软件，建立了碰撞有限元模型，模型中考虑了地基变形和支座非线性的影响，并用Kelvin模型来模拟邻梁碰撞；根据规范和已有试验结果建立了高铁桥梁列车制动力模型，进行了高速列车制动力与EL-Centro地震波作用下的碰撞效应分析，探讨了列车制动力对简支梁桥地震碰撞效应的影响。研究表明：列车制动力可增大桥墩的墩底剪力，增大邻梁或梁台间距，增大邻梁最大碰撞力和碰撞次数，加剧固定支座的破坏；影响程度与列车制动力和地震力的方向、桥墩刚度有关。因此在高铁简支梁桥抗震设计时，有必要考虑将列车制动力与地震力进行组合，开展碰撞效应分析。

Abstract

Taking a high-speed railway 3-span simply supported bridge as background engineering, the collision finite element model of it is established with the ANSYS software. In this model, the foundation deformation and the nonlinearity of bearings are considered, and the Kelvin model is used to model the collision between the adjacent beams. The train braking force model is obtained by the code and existing testing results. Finally, the pounding effect subject to the EL-Centro wave is analyzed, and the influence on pounding effect subjected to the high-speed train braking force is discussed. The results show that the train braking force makes the shearing force at the bottom of the pier larger, increases the space between the adjacent beams, enlarges the maximum impact force and the collision frequency, and aggravates the destruction of the restrained supports. The influence degree is related to the direction between train braking force and seismic load, and the stiffness of the piers. Therefore, the pounding effect under the combination action of train braking force and seismic load is very necessary to be investigated for the seismic design of the high-speed railway simply supported bridge.

导出引用

杨孟刚;潘增光;. 高速铁路列车制动力对简支梁桥地震碰撞效应影响研究[J]. 振动与冲击, 2014, 33(15): 167-173

YANG Meng-gang;PAN Zeng-guang;. Research on pounding effect induced by earthquake for high-speed railway simply supported bridge subjected to train braking force[J]. Journal of Vibration and Shock, 2014, 33(15): 167-173