【摘要】 基于京珠、粤赣、渝湛三条高速公路车辆荷载动态称重实测数据,采用蒙特卡罗法生成随机车流。将此随机车流加载于虚拟简支梁上,通过自编Matlab程序计算车辆荷载效应,并采用GPD分布拟合车辆荷载效应的尾部分布,结合极值理论、超越概率理论,构建了现实运营车辆荷载条件下剩余服役期内的荷载效应最大值分布函数。根据既有桥梁承载能力现状,分析了现实运营车辆荷载情况下既有桥梁结构的可靠度。得出目前既有桥梁在剩余服役期内可靠度偏低,致其安全性不足的结论。更多还原

【Abstract】 Based on the vehicular Weigh in Motion(WIM) data of three Expressways(Jing-Zhu, Yue-Gan and Yu-Zhan Expressway), a random vehicle flow was generated by Monte Carlo method. Then, put the random vehicle flow on a simple-supported beam to calculate the load effect by a self-made Matlab program. Furthermore, a function of maximum load effect distribution for actual operating vehicles was established by using the GPD distribution and extreme value theory to fit the tail of load effect. The reliability of the bridge structure in the conditions of actual operating vehicle loading was analyzed in the end, according to the current situation of bearing capacity of the bridge structure.更多还原