不同设计基准期桥梁结构可靠指标的动态分析  

Dynamic Analysis of the Reliability Index of Bridge Structure under Different Design Reference Period

作　　者：冷福增 王潮海[2] 郑继光[3] 

机构地区：[1]吉林建筑大学交通科学与工程学院,长春130118 [2]吉林省交通运输厅,长春130025 [3]吉林省交通科学研究所,长春130012

出　　处：《交通科技》2016年第2期34-37,共4页Transportation Science & Technology

基　　金：交通运输部西部交通建设科技项目(20113188011000)资助

摘　　要：基于影响桥梁结构可靠度的基本因素,考虑恒载与汽车荷载效应的基本组合,通过推算汽车荷载在不同设计基准期内的统计参数,采用可靠度校准法对不同设计基准期下桥梁结构的可靠度进行分析。并由JC法计算不同破坏类型受力构件的目标可靠指标值与结构抗力均值。结果表明,目标可靠指标与设计基准期近似呈线性递减关系,不同基准期下达到同一目标可靠指标所需抗力均值与设计基准期近似呈线性递增关系。Based on the probability characteristics of basic variable affecting the structure reliability,considering the basic combination of the effect of dead load and vehicle load,through calculating the statistical parameter of vehicle load in different design reference period,the reliability of bridge structure is analyzed under different design reference period according to the calibration method of reliability.The target reliability index and the mean of the resistance of different stress component are calculated by JC method.The results indicate that the target reliability index decreases and the mean of the resistance to achieve the same target reliability index increases linearly with the design reference period approximately.

关 键 词：桥梁工程 可靠度 校准法 目标可靠指标 结构抗力 设计基准期 

分 类 号：U441[建筑科学—桥梁与隧道工程]