基于实测车辆荷载的等高度连续刚构桥动力响应分析

摘要

通过利用成熟的元胞自动机模型中的双车道模型(NaSch)结合实测车辆荷载数据进行演化,生成基于实测车辆荷载信息的随机车流数据,而后赋予它实时位置变换信息用以模拟实际交通流的行进过程.把这个车流盒子信息加载到ABAQUS已经建立好的等高度连续刚构桥模型中,进行动态响应分析.再利用MIDAS软件,依据规范中关于静载的加载方法在同样的桥梁模型中加载,并得出静载作用下的数值结果的模拟路面上的车流荷载,最后把两个数值分析结果进行对比分析可以得到:等高度连续刚构桥在实际车辆运行过程中,桥梁各跨跨中位移的敏感性超过各跨跨中应力的敏感性.%Combined with measured vehicle load data and based on measured vehicle load information, random traffic flow data is obtained by using the two lane model (NaSch) in the mature cellular automata model. Then the real time position information is given to simulate the actual traffic flow. The vehicle box information is loaded into the constant height continuous rigid frame bridge model established by ABAQUS, and the dynamic response analysis is carried out. On the basis of the MIDAS software, the static loading method is used in the same bridge model and the results of the static load by numerical simulation are obtained. Finally, results of the numerical analysis are compared and analyzed. The results show that in the process of actual vehicle operation, the sensitivity of the midspan displacement of the continuous rigid frame bridge is higher than the stress sensitivity.