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为了定量地研究大跨桥梁在多种随机因素下的可靠度,采用了蒙特卡罗法中的拉丁超立方体抽样法,对润扬悬索桥(中国跨度最大的悬索桥)在温度、风、车辆荷载、车辆冲击等随机变量作用下的结构可靠度进行了计算.通过对大桥在正常运营和损伤状态下的可靠度分析,获得了大桥主缆应力、吊索应力、桥塔位移以及钢箱梁线形等重要指标的可靠度和累积分布函数,分析结果形象直观,提高了评估的效率,使维护决策的制定更加客观准确.
In order to quantitatively study the reliability of long-span bridges under a variety of random factors, the Latin hypercube sampling method in Monte Carlo method was used to analyze the influence of temperature, wind, vehicle load, Vehicle impact and other random variables.According to the reliability analysis of the bridge under normal operation and damage conditions, the main cable stress, the sling stress, the displacement of the bridge tower and the line shape of the steel box girder are obtained The reliability and cumulative distribution function of important indicators, the analysis results are intuitive and the evaluation efficiency is improved, making the formulation of maintenance decision-making more objective and accurate.