Time-dependent reliability analysis of circular CFST stub columns under environmental corrosion

Pacific Science Review Pub Date : 2014-12-01 DOI:10.1016/j.pscr.2015.04.002

Yan-lei Wang, Ming-min Cao, Hui-jie Sun

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引用次数: 10

Abstract

Concrete filled steel tubular (CFST) columns subjected to environmental attack can experience changes in resistance that are time-variant. In this study, the axial compressive strength loss in circle CFST stub columns due to corrosion of the outer steel tube is investigated. The assessment of the time-dependent reliability analysis of circular CFST stub columns under environmental corrosion is presented. A probabilistic axial compression model for circular CFST stub columns is developed based on an analytic formula that considers corrosion-related and time-dependent factors. This study involves the formulation of a limit states function, the development of load models, the development of resistance models for corroded circular CFST columns, time-dependent reliability and resistance analysis for a hypothetical stub column. The results of this study can be applied to achieve a better prediction of the service life of deteriorating circular CFST columns and the development of optimal reliability-based maintenance strategies.

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环CFST短柱环境腐蚀时变可靠度分析

钢管混凝土(CFST)柱在受到环境冲击时，其阻力会发生时变变化。本文研究了圆形钢管混凝土短柱因外钢管腐蚀而产生的轴向抗压强度损失。提出了环CFST短柱在环境腐蚀作用下的时变可靠度评估方法。基于考虑腐蚀相关因素和时间相关因素的解析公式，建立了圆形CFST短柱的概率轴压模型。本研究涉及极限状态函数的制定、荷载模型的开发、腐蚀圆形CFST柱的阻力模型的开发、假设性短柱的时变可靠性和阻力分析。研究结果可用于更好地预测劣化循环钢管混凝土柱的使用寿命，并制定基于可靠性的最优维护策略。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Pacific Science Review

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