基于元胞自动机的路面车流荷载

Traffic Flow Loads on Pavement Based on Cellular Automaton Model

引入微观交通流模型中的元胞自动机模型来模拟路面上的车流荷载,用元胞的演变规则分析车流行驶过程中各个车辆的速度以及它们之间车距的变化;车辆振动模型采用1/4车身结构的2自由度模型,并根据国家标准GB7031-86规定生成路面轮廓的时域信号.分析了某盾构隧道在车流荷载作用下的动力响应,为研究车流荷载作用下隧道结构动力响应提供了数值参考.

The cellular automaton model was introduced to simulate traffic flow loads on pavement, and the velocities and relative distances of every vehicle were gained by using its simulation rules. The simulation model of the quarter vehicle vibration system was used. Power spectral density was used to describe the stochastic characteristic of pavement roughness. The dynamic response of shield tunnel under traffic flow loads was analyzed. Some conclusions were drawn, which could provide references for the structural design of shield tunnel.