基于混合模拟法的连续刚构桥静力可靠度分析

发布时间：2018-04-17 16:03

本文选题：连续刚构桥 + 静力体系　；参考：《桥梁建设》2015年03期

【摘要】：为对大跨连续刚构桥在多维随机因素作用下的安全性进行有效评估,将Monte-Carlo法与响应面法相结合,建立基于混合模拟法的结构可靠度分析方法。该方法首先利用MonteCarlo法对结构进行若干次循环分析,以此计算出各随机变量的可靠性灵敏度因子,再将灵敏度较高的输入变量继续作为随机变量,利用响应面法拟合出结构的功能函数,最后利用Monte-Carlo法求解出显式化功能函数的可靠指标。采用混合模拟法与概率网络估算法相结合计算承载能力极限状态下连续刚构桥的可靠度,以广西百色市江坝右江特大桥为例进行分析,结果表明,承载能力极限状态下,中跨跨中截面抗弯失效模式是该桥上部结构静力体系可靠度的控制失效模式。
[Abstract]:In order to effectively evaluate the safety of long-span continuous rigid frame bridge under the action of multi-dimensional random factors, the Monte-Carlo method and the response surface method are combined to establish a structural reliability analysis method based on hybrid simulation method.In this method, the reliability sensitivity factor of each random variable is calculated by using the MonteCarlo method to analyze the structure several times, and then the input variable with high sensitivity is used as the random variable.The function function of the structure is fitted by the response surface method, and the reliability index of the explicit function is solved by using the Monte-Carlo method.The reliability of the continuous rigid frame bridge under the limit state of bearing capacity is calculated by using the hybrid simulation method and the probability network estimation method. Taking the Jiangba Youjiang Bridge in Baise City, Guangxi as an example, the results show that, under the limit state of bearing capacity, the reliability of the continuous rigid frame bridge is calculated.The bending failure mode of middle span cross section is the control failure mode of the static system reliability of the bridge superstructure.
【作者单位】：东南大学交通学院;合肥工业大学交通工程学院;东南大学土木工程学院;
【基金】：国家重点基础研究发展规划(973计划)项目(2012CB026200) 江苏省研究生科研创新项目(CXZZ13_0110) 东南大学优秀博士学位论文基金资助项目(YBJJ-1422)~~
【分类号】：U448.23

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