建筑结构学报2024，Vol.45Issue(4)：247-253,7.DOI:10.14006/j.jzjgxb.2022.0863
既有建筑结构安全性鉴定中分项系数的调整研究
Research on adjusting partial factors in safety appraisal of existing building structure
摘要
Abstract
It is simple and universal to directly use the design formula in the appraisal of existing building structures.However,the appraisal method of adjusting partial factor based on the reliability index is more reasonable,which can make full use of the actual situation of existing buildings and avoid potential uncertain risks.Therefore,based on the reliability index,decomposition algorithms of component bearing capacity partial factors were compared.The adjustment methods of resistance partial factors and material strength partial factors were illustrated,and their feasibility in the identification of existing building structures was verified through engineering examples.Through research and comparison,it can be concluded that the direct decomposition method is simple and clear.When the variation factor of bearing capacity is between 0.11 and 0.15,and the reliability index is between 3.5 and 5,the direct decomposition method and the indirect decomposition method are equivalent.It is feasible to evaluate existing building structures by adjusting the resistance factor and material strength factor,especially by using the method of adjusting material strength factor.With reasonable division of testing batches and reliable testing data,the reliability index margin of the measured material strength or material strength factor of the existing building can be fully utilized,and the target reliability index requirements specified in the standard is also satisfied.关键词
既有建筑结构/可靠指标/安全性鉴定/构件承载力/抗力分项系数/材料强度分项系数Key words
existing building structure/reliable indicator/safety appraisal/component bearing capacity/partial factor of resistance/partial factor of material strength分类
建筑与水利引用本文复制引用
刘立渠,彭立新,赵振红,沈孛,张志远,张建林,罗水生..既有建筑结构安全性鉴定中分项系数的调整研究[J].建筑结构学报,2024,45(4):247-253,7.基金项目
中国建筑科学研究院有限公司科研基金项目(20220112330730019),建研院检测中心有限公司青年科研基金项目(20220126977430002). （20220112330730019）
