大跨连续梁桥车桥耦合振动响应研究

为研究大跨连续梁桥车桥耦合振动响应,基于结构动力学基本原理,结合桥梁设计规范,建立五轴重卡车辆和大跨连续梁桥动力学方程；通过车桥耦合几何和力学条件,组建车桥耦合时变矩阵,并考虑空间路面不平度影响,通过自编程序,开展敏感参数下大跨连续梁桥动力响应和冲击系数影响研究。结果表明：在各敏感参数下,桥梁冲击系数计算值普遍大于规范值,建议应重点关注敏感参数对大跨连续梁桥的动力响应,相关研究可为此类桥梁安全运营提供参考。

Research on Vehicle-Bridge Coupling Vibration Response of Long-span Continuous Girder Bridge

In order to study the vehicle-bridge coupled vibration response of a long-span continuous beam bridge, based on the basic principles of structural dynamics, combined with bridge design specifications, the dynamic equations of five-axle heavy-duty truck and long-span continuous beam bridge are established; Vehicle-bridge coupling time-varying matrix, and considering the impact of spatial road unevenness, through self-programming, the dynamic response of long-span continuous girder bridges under sensitive parameters and the impact of impact coefficients are studied. The results show that under the sensitive parameters, the calculated value of impact coefficient is generally greater than the standard value, indicating that the dynamic response of sensitive parameters to the long-span continuous beam bridge should be paid attention to. Related research can provide reference for the safe operation of such bridges.