| 考虑桩土相互作用的车-轨-桥系统地震响应分析 |
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| 引用本文： | 雷虎军,黄江泽. 考虑桩土相互作用的车-轨-桥系统地震响应分析[J]. 西南交通大学学报, 2021, 56(2): 229-237. DOI: 10.3969/j.issn.0258-2724.20190694 |
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| 作者姓名： | 雷虎军 黄江泽 |
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| 基金项目： | 国家自然科学基金（51878173，51608120）；福建省高校杰出青年科研人才培育计划（GY-Z18159） |
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| 摘 要： | 弄清桩土相互作用对车桥系统地震响应的影响对于研究地震引起的高速铁路桥上列车行车安全问题十分必要.基于列车-轨道-桥梁耦合振动理论,采用Winkler地基梁模拟群桩基础并通过m法计算弹簧参数,建立了地震作用下的列车-轨道-桥梁-群桩耦合振动模型,并编制了仿真分析程序.以某(88+168+88)m预应力混凝土连续刚构桥为例...
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| 关 键 词： | 车桥耦合振动 桩土相互作用 行车安全性 脱轨系数 轮重减载率 |
| 收稿时间： | 2019-07-17 |
Seismic Responses Analysis of Train-Track-Bridge System Considering Pile-Soil Interaction |
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| LEI Hujun,HUANG Jiangze. Seismic Responses Analysis of Train-Track-Bridge System Considering Pile-Soil Interaction[J]. Journal of Southwest Jiaotong University, 2021, 56(2): 229-237. DOI: 10.3969/j.issn.0258-2724.20190694 |
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| Authors: | LEI Hujun HUANG Jiangze |
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| Abstract: | Understanding the influence of pile-soil interaction on seismic responses of a train-bridge system is necessary for studying the safety of trains running over high-speed railway bridges under earthquake. Based on the train-track-bridge coupled vibration theory, the Winkler foundation beam is used to simulate the pile group foundation and spring parameters are calculated by m method. A complete train-track-bridge-pile group coupled vibration model with seismic excitations is established, and a simulation analysis program is developed. Taking a (88 + 168 + 88) m prestressed concrete continuous rigid frame bridge as an example, a pile group foundation model considering pile-soil interaction, a rigid foundation model and an elastic foundation model are established respectively, and the last two models are used for comparison with the first one. By inputting three typical seismic waves, the coupled vibration responses of the three models are calculated and compared, and the pile-soil interaction is studied. The results show that the influence of pile-soil interaction on the lateral dynamic responses of the bridge, track and train subsystems under earthquake is greater than that on the vertical one, and the influence on the dynamic responses of the bridge and track subsystems is greater than that of the train subsystem. For the calculation conditions of this paper, the dynamic responses of bridge, track and train subsystems will be smaller if pile-soil interaction is not considered; specifically, the derailment coefficient, wheel load reduction rate and wheel-axle lateral force of the train are 5.8%, 8.6% and 9.0% smaller, respectively. Besides, the influence of pile-soil interaction on the safety index of the train will not change with the train speed. The obtained results can provide reference for the seismic design of high-speed railway bridges in earthquake areas. |
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