连续曲线钢箱梁桥车桥耦合动力响应参数分析
Parameter Analysis of Vehicle-Bridge Coupled Dynamic Response Based on Continuous Curve Steel Box Girder Bridge
DOI: 10.12677/HJCE.2017.61008, PDF, HTML, XML, 下载: 1,500  浏览: 2,949  国家自然科学基金支持
作者: 何知银：贵州省都匀公路管理段，贵州 都匀；李德建, 于鹏*：中南大学土木工程学院，湖南 长沙
关键词: 连续曲线钢箱梁；车桥耦合；动力响应；参数分析；Continuous Curve Steel Box Beam； Vehicle-Bridge Coupled System； Dynamic Response； Parameter Analysis
摘要: 采用七自由度空间曲梁单元和七自由度车辆模型模拟桥梁和车辆，基于频率功率谱等效的方法模拟桥面不平度，分析了连续曲线钢箱梁的车桥耦合动力响应，建立起车桥耦合系统动力学模型，经自编程序对其进行动力响应研究。结果表明：当桥梁曲率半径小于某定值后，其各项响应量值将迅速增大，且扭矩的动力放大效应要大于弯矩；桥梁位移动力放大系数随横向加载车道数的减小而增大，随纵向车辆行驶间距的增大而增大，但响应量值大大减小。
Abstract: By simulating the bridge with 7-DOF spatial curved beam element and the vehicle with 7-DOF ve-hicle model, the vehicle-bridge coupled dynamic response of continuous curve steel box girder bridge was investigated. As vibration source, the road irregularity was simulated by frequency power spectrum equivalent method. The vehicle-bridge coupled dynamics model was established and its dynamic response was studied by self-compiled program. The results show, when bridge curve radius is less than a fixed value, its various responsive values increase rapidly, and the dynamic magnified factor (DMF) of torque is larger than bending moment; the DMF increases with the decrease of transversal loaded-lane-number and the increase of longitudinal vehicle distance, but corresponding responsive value is greatly reduced.
文章引用：何知银, 李德建, 于鹏. 连续曲线钢箱梁桥车桥耦合动力响应参数分析[J]. 土木工程, 2017, 6(1): 68-75. http://dx.doi.org/10.12677/HJCE.2017.61008

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