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针对目前尚无拱桥吊杆车辆荷载效应概率模型的问题,利用监测数据研究建立了拱桥吊杆实际车辆荷载效应模型。介绍了某钢管混凝土拱桥吊杆车辆荷载效应监测系统的组成模块及各模块的功能,通过监测系统采集获得了579个吊杆实测车辆荷载效应监测数据。以所得监测数据为研究对象。采用统计方法,分析了吊杆实际车辆荷载效应截口分布类型;采用蒙特卡罗模拟法,分析了设计基准期内吊杆车辆荷载效应最大值分布类型。结果表明,拱桥吊杆车辆荷载效应截口分布服从对数正态分布;设计基准期内车辆荷载效应最大值服从广义极值分布;利用监测数据建立的吊杆车辆荷载效应模型可以较好地反映桥梁的实际车辆荷载情况。
Aiming at the problem that there is no probabilistic model for the load effect of the arbor boom, the actual vehicle load effect model of the arbor boom is established by using the monitoring data. This paper introduces the components of the load effect monitoring system of a concrete filled steel tubular arch bridge crane boom and the function of each module. Through the monitoring system, 579 boom load monitoring data are obtained. The monitoring data obtained for the study. The statistic method was used to analyze the type of kerf distribution of actual vehicle load effect. The Monte Carlo simulation method was used to analyze the distribution of the maximum value of load effect of boom vehicle during the design reference period. The results show that the distribution of load effect of arch bridge crane boom obeys lognormal distribution; the maximum of vehicle load effect obeys generalized extreme value distribution in the design reference period; the load effect model of boom vehicle established by monitoring data can well reflect The actual vehicle load of the bridge.