民用建筑砌体结构构件承载力鉴定评级的分析与建议  

Analysis and suggestions on appraisal and rating of bearing capacity of civil building masonry structural components

作　　者：陈大川[1] 王剑 施楚贤[1] CHEN Dachuan;WANG Jian;SHI Chuxian(School of Civil Engineering,Hunan University,Changsha 410082,China)

机构地区：[1]湖南大学土木工程学院,长沙410082

出　　处：《建筑结构》2023年第16期111-115,137,共6页Building Structure

基　　金：国家重点研发计划(2016YFC0701308)。

摘　　要：现行国家标准《民用建筑可靠性鉴定标准》(GB 50292—2015)中,各类构件的安全性鉴定评级均按照相同的分级原则确定。在各安全性等级下,不同结构构件通过抗力与效应比表达的验算表征基本参照《民用建筑可靠性鉴定标准》(GB 50292—1999)的规定。为改进各类砌体结构可靠性鉴定与分级标准,结合我国相关设计规范,以砌体结构为研究对象,通过当量正态化和验算点法计算砌体结构构件在不同安全性等级下的可靠指标,综合考虑荷载分项系数调整前后砌体结构构件可靠指标的变化,提出相应的分级标准。分析结果表明,《民用建筑可靠性鉴定标准》(GB 50292—2015)对于各个安全等级下的砌体结构构件的安全性分级偏于保守,在荷载分项系数调整后更为突出,而改进的分级标准能更准确地将可靠指标和抗力与效应比相对应。In the current national standard Standard for appraisal of reliability of civil buildings(GB 50292—2015),the safety appraisal and rating of various components are determined according to the same grading principle.Under each safety level,the check calculation formulas of different structural components expressed by the ratio of resistance to effect basically refer to the provisions of Standard for appraisal of reliability of civil buildings(GB 50292—1999).In order to improve the reliability appraisal and classification standards for masonry structures,combined with relevant design codes of our country,the masonry structure is taken as the research object,the reliability index of masonry structural members under different safety levels was calculated by equivalent normalization and checking point method.Comprehensively considering the changes of the reliability index of the masonry structural members before and after the adjustment of the load sub-factors,the corresponding grading standards was put forward.The analysis results show that the Standard for appraisal of reliability of civil buildings(GB 50292—2015)is conservative in the safety classification of masonry structural members under each safety level,which is more prominent after the load sub-factor adjustment,while the improved classification standard can more accurately correlate reliable indicators and the ratio of resistance to effect.

关 键 词：分级标准 可靠指标 砌体结构 承载能力 安全性 

分 类 号：TU311[建筑科学—结构工程]