既有建筑结构体系可靠性评估实用方法

回顾和总结了结构可靠度理论的发展历史以及既有建筑结构评估的研究现状,指出现有结构体系可靠性评估方法的不足.针对存在的问题,提出了基于子结构的既有建筑结构体系可靠性评估的简化方法,建议将子结构取为自然层,先对子结构进行可靠性评估,再根据子结构评定结果,通过结构自然层间的相关关系对结构体系可靠性进行评估.根据层次分析法,提出了一种适合工程应用的子结构中构件权重系数实用计算方法.工程实例分析结果表明,所提方法得出的评定结果能更好地符合实际情况.

An Applicable Method to Assess the Reliability of Existing Building Structures

In this paper,the development history of the theory of structural reliability,and the state of the art of evaluation for existing building structures are reviewed.Shortcomings of existing methods for the reliability evaluation of structural systems are pointed out.A simplified method to assess the reliability of existing building structures based on minor structures is proposed in the paper.In the proposed method,the reliability of minor structures,usually they are taken as natural stories of the structure,is assessed first,and the reliability of the structural system is then evaluated according to the results of minor structures and the relationship between any two minor structures in the structural system.Based on Analytic Hierarchy Process(AHP) method,an applicable method to determine the weight coefficients of structural members in a minor structure is deve-loped,which can be easily used in civil engineering.Calculation results for engineering examples show that the method proposed can give a more accurate assessing result.