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通过构建三维路面谱,使用ABAQUS有限元软件建立车辆和桥梁结构模型,针对箱梁桥扩宽工程中车桥耦合振动对桥梁结构的影响程度进行了计算分析。结果表明:车速对梁桥振动的影响与速度不成比例,并非车速越大桥梁振动越剧烈;路面平整程度对车辆荷载作用下梁桥振动响应有十分显著的影响;以及新旧桥连接形式的不同对桥梁结构振动和内力有较大的影响。
Through building three-dimensional road surface spectrum, using ABAQUS finite element software to build the vehicle and bridge structure model, the influence of the bridge-coupled vibration on the bridge structure in the widening of the box girder bridge is calculated and analyzed. The results show that the influence of vehicle speed on the vibration of the bridge is not proportional to the speed. The greater the vibration of the bridge is, the more severe the vibration of the bridge is. The degree of pavement has a very significant influence on the vibration response of the bridge under vehicle load. Bridge structure vibration and internal forces have a greater impact.