公路桥车桥耦合振动的隐式和显式分析方法研究

求解公路桥在车辆荷载作用下的振动响应,不仅能为设计提供参考,还可以为桥梁运营阶段的管理和养护提供依据。对比分析车桥耦合振动的隐式和显式分析方法,分别在Matlab自编程序和LS-DYNA有限元程序中建立隐式模型和显式模型,以一座简支空心板梁桥为算例,用两种分析方法分别求解该桥在移动车辆荷载作用下的振动响应,并将数值计算结果与实测结果对比,分析两种方法的合理性。研究结果表明,两种建模分析方法各有利弊,显式建模计算结果峰值偏大,综合考虑,建议采用隐式建模分析方法求解车桥耦合振动响应。

The Implicit and Explicit Analysis Method for Vehicle Bridge Coupled Vibration of Highway Hridge

Solved the vibration response of highway bridge under vehicle load can not only provided reference for design,but also provided basis for bridge management and maintenance of bridge operation stage.The implicit and explicit analysis methods of vehicle-bridge coupling vibration were compared,and the implicit and explicit models were established in MATLAB and LS-DYNA respectively.Taked a simply supported hollow slab girder bridge as an example,the vibration responses of the bridge under moving vehicle loads were solved by two analysis methods.The rationality of the two methods was analyzed by comparing the numerical results with the measured ones.The results show that the two modeling methods have their advantages and disadvantages,explicit modeling results have a high peak value,overall consideration,the implicit modeling method is proposed to solve the vehicle-bridge coupling vibration response.