基于计算可靠度的在役RC结构构件的安全性评定

SECURITY EVALUATION ON EXISTING RC STRUCTURAL ELEMENTS BASED ON CALCULATED RELIABILITY

对考虑抗力衰减以及后续服役基准期不同的RC结构构件的可靠指标进行计算,通过研究计算得到的可靠指标与其安全等级之间的关系,给出了安全等级评定时的计算可靠指标标准;通过具体工程实例,运用JC法和改进一次二阶矩法,结合MATLAB优化工具箱计算在役RC结构构件的可靠指标。对照给出的安全等级标准,得出构件的鉴定安全等级,实现了RC结构构件安全性评定的定量描述。

It was conducted the calculation of reliabiltiy index of RC structural members with resistance decay and different periods of follow-up service taken into acount.The reliability indes standard for evaluating safety grade was given by the relation between the calculated reliability index and safety grade.The reliability index of an in-service RC member was calculated by JC method and modified first-second-order moment combined with MATLAB,according to a specific project,then the evaluated safety grade of the member was obtained by contrasting the standard of safety grade,thus realizing a quantitative description of safety evaluation on RC members.