根据上海某斜拉桥的动态称重系统（WI M）所采集的车辆信息数据，以索梁和索塔锚固区的钢锚箱作为研究对象，分别计算不同轴型的汽车加载时钢锚箱的应力变化历程，采用雨流计数法建立疲劳细节的应力谱，参考 BS5400确定疲劳细节的 S－N曲线，结合线性累积损伤准则公式计算钢锚箱的疲劳寿命，并对该结果做出分析和说明。%According to the data of vehicle information from the Weigh﹣in﹣Motion system(WIM)of Shanghai Certain Cable﹣stayed Bridge. The research objects are the steel anchor box of anchorage zone and tower anchorage area. Define the stress change course of all selected anchor boxes undertook the dif﹣ferent vehicle load. After calculate stress change course via Rain Flow Counting method we get the stress spectrum of fatigue details. Refer to the S-N curve of fatigue details depend on BS5400 and linear cumu﹣lative damage rule formula,calculate the fatigue life of all the anchor boxes and make an analysis and de﹣scription of this result.
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