受拉钢构件可靠指标退化分析

The analysis of tensile steel member’s deteriorating reliability index

根据试验结果和现有文献资料,对锈蚀钢材的力学性能、锈蚀速率等方面进行研究,获得钢材锈蚀规律,提出受拉钢构件抗力衰减模型。采用一次二阶矩法计算不同服役年限的受拉钢构件可靠指标,研究受拉钢构件时变可靠指标退化规律。

According to the test results and available literature,based on the statistical analysis of the mechanical properties and corrosion rate of corroded steel,the corrosion law of steel was obtained,and the resistance attenuation model of tensile steel members was further studied. The method of the first-order second-moment method is used to calculate the reliability index of the tensile steel members with different service life,so as to obtain the law of the reliability index of the tensile bearing capacity of the tensile steel members changing with time.