高速铁路列车制动力对简支梁桥地震碰撞效应影响研究

发布时间：2018-05-11 13:42

本文选题：高速铁路 + 简支梁桥　；参考：《振动与冲击》2014年15期

【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 the three span simple beam bridge of high speed railway as an example, the collision finite element model is established by using ANSYS software. The model is used to consider the influence of the foundation deformation and the bearing nonlinearity, and the Kelvin model is used to simulate the adjacent beam collision. According to the standard and the existing test results, the dynamic model of the high speed rail vehicle is set up, the braking force and the EL- of the high-speed train are carried out. The impact effect of Centro seismic wave is analyzed, and the influence of train braking force on the seismic impact of simple beam bridge is discussed. The study shows that the train braking force can increase the pier bottom shear force, increase the distance between the adjacent beam or the beam and platform, increase the maximum collision force and collision times of the adjacent beam, aggravate the damage of the fixed support, and the influence degree and train braking. The stiffness of the bridge pier is related to the direction of the force and the seismic force. Therefore, it is necessary to consider the combination of the train brake force and the earthquake force in the seismic design of the high iron simply supported beam bridge, and to carry out the analysis of the impact effect.

【作者单位】：中南大学土木工程学院;高速铁路建造技术国家工程实验室;长沙市望城区工务局;
【基金】：国家自然科学基金项目(51378504;51308549)
【分类号】：U441;U442.55

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