Analysis of High-speed Vehicle-bridge Interactions by a Simplified 3-D Model
Analysis of High-speed Vehicle-bridge Interactions by a Simplified 3-D Model
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通过简化的 3-D 模型分析高速车桥相互作用
DOI：
10.12989/sem.2002.13.5.505
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发表时间：
2002
影响因子：
2.2
通讯作者：
Chang
中科院分区：
文献类型：
--
作者：
Myung;Chang
在这项研究中，分析高速车桥相互作用的简化三维有限元模型进行。由于铁路多为双线结构，车轴与铁路桥梁横截面中性轴之间存在偏心。因此，为了更高效、更准确地进行车桥相互作用分析，分析模型应考虑轴载偏心率和作用在桥梁上的扭转力的影响。研究了车辆轴重偏心和车速对车桥相互作用的影响。在第一种情况下，只有一列火车在其轨道上移动，而在另一种情况下，两列火车分别在其轨道上以相反的方向移动。通过对一座既有桥梁的分析，验证了简化三维模型的有效性和实用性。
In this study, the analysis of high-speed vehicle-bridge interactions by a simplified 3-dimensional finite element model is performed. Since railroads are constructed mostly as double tracks, there exists eccentricity between the vehicle axle and the neutral axis of cross section of a railway bridge. Therefore, for the more efficient and accurate vehicle-bridge interaction analysis, the analysis model should include the eccentricity of axle loads and the effect of torsional forces acting on the bridge. The investigation into the influences of eccentricity of the vehicle axle loads and vehicle speed on vehicle-bridge interactions are carried out for two cases. In the first case, only one train moves on its track and in the other case, two trains move respectively on their tracks in the opposite direction. From the analysis results of an existing bridge, the efficiency and capability of the simplified 3-dimensional model for practical application can be also verified.