论文部分内容阅读
曲线梁桥由于构件初始曲率的存在,汽车荷载的偏心作用将加大曲线结构内、外侧腹板受力差异,冲击系数算法仍未考虑其差别。综合考虑随机桥面不平度及其速度项的影响,采用空间有限元方法对桥梁模型和12自由度三轴车辆模型进行离散,基于ANSYS编制分析程序采用分离迭代算法分析了车辆偏心作用对曲线梁桥车桥耦合振动响应的影响。分析结果表明:车辆以不同偏心通过桥梁时,主梁横断面上不同位置处的位移与内力响应和冲击系数的差别很大,主梁不同位置的内力和位移响应受偏心行驶的影响也有较大差别。分析结果对于曲线桥设计有较大的参考意义。
Due to the existence of the initial curvature of the curved beam bridge, the eccentric load of the vehicle load will increase the force difference of the inner and outer webs of the curve structure, and the impact coefficient algorithm has not considered the difference. Considering the influence of random surface roughness and its velocity, the bridge finite element method is used to discretize the bridge model and the 12-DOF triaxial vehicle model. Based on the ANSYS programming program, the separation iteration algorithm is used to analyze the effect of vehicle eccentricity on the curve beam Influence of Bridge Vibration Response of Bridge. The analysis results show that when the vehicle passes the bridge with different eccentricity, the displacement and the internal force response and the impact coefficient differ greatly at different positions on the cross section of the main girder, and the internal forces and displacement responses at different positions of the main girder are also greatly affected by the eccentric driving difference. The result of the analysis has great reference meaning for the curved bridge design.