泰州长江大桥钢塔疲劳计算随机车辆荷载模拟

通过对江阴长江大桥实际行驶车辆的概率统计分析,采用分段多项式曲线拟合方法得到了货车和客车的随机车重概率近似表达式。通过泊松方法建立车辆随机间距的数学模型,将采用数学模型的计算结果与实际观测数据进行了对比分析,表明了建立的数学模型的有效性。基于以上的数学模型和随机过程理论,建立了泰州长江公路大桥钢塔疲劳计算随机车辆荷载模型,以便能够更好的重现公路桥梁实际车辆的统计特性。

Simulation of Random Vehicle Load for Fatigue Calculation of Steel Pylon of Taizhou Yangtze River Bridge

According to the results of investigation and statistical analysis of vehicles passing Jiangyin Yangtze River Bridge,a probability approximate expression of random load of buses and lorries was obtained by multinomial fitting.The vehicle stochastic spacing mathematical model was established by using Poisson method.The comparative analysis between the results of mathematical models and the actual data showed effectiveness of the established mathematical model.Based on the abovementioned expression of vehicle load and random process theory,the random vehicle load models for fatigue calculation of steel pylon of Taizhou Yangtze River Road Bridge was established by Monte Carlo method to better reproduce the statistic properties of actual vehicles passing highway bridges.