Probabilistic restoring force model of corroded steel column considering corrosion pit random characteristics

IF 6.6 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures Pub Date : 2025-09-23 DOI:10.1016/j.tws.2025.114021

Youde Wang , Xiaodong Zhou , Zhihao Fang , Hao Wang , Haijiang Zhang , Bo Liu , Muzaffar Hamdamov , Shanhua Xu

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Abstract

This paper systematically investigated the influence of corrosion on the hysteretic performance of steel columns through experimental research, theoretical analysis and numerical simulation. A probabilistic restoring force model of corroded steel column considering corrosion pit random characteristics was established. Pseudo-static tests on artificially accelerated corroded steel columns revealed that corrosion accelerated buckling occurrence, reduced buckling deformation range of column bottom, and significantly decreased strength, stiffness and ductility. Based on the load-displacement hysteresis curves and theoretical analysis, a restoring force model (RFM) for corroded steel columns was proposed. To quantify the uncertainty introduced by corrosion pit randomness for RFM, extensive finite element parametric analyses of corroded steel columns were performed through Monte Carlo simulation. The results showed that key parameters of RFM followed normal distributions. Their mean and standard deviation exhibited functional relationships (linear or power) with the non-uniform corrosion ratio of steel column (ρ_pc). Accordingly, a probabilistic RFM of corroded steel column considering corrosion pit random characteristics was established, providing theoretical basis and data support for the seismic performance assessment of existing corroded steel structures.

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考虑腐蚀坑随机特性的腐蚀钢柱概率恢复力模型

本文通过试验研究、理论分析和数值模拟等方法系统研究了腐蚀对钢柱滞回性能的影响。建立了考虑腐蚀坑随机特性的锈蚀钢柱概率恢复力模型。人工加速腐蚀钢柱的拟静力试验表明，腐蚀加速了柱的屈曲发生，降低了柱底屈曲变形范围，显著降低了柱的强度、刚度和延性。基于荷载-位移滞回曲线和理论分析，提出了锈蚀钢柱的恢复力模型。为了量化腐蚀坑随机性带来的不确定性，通过蒙特卡罗模拟对腐蚀钢柱进行了广泛的有限元参数分析。结果表明，RFM关键参数服从正态分布。其均值和标准差与钢柱非均匀腐蚀比（ρpc）呈线性或幂函数关系。据此，建立了考虑腐蚀坑随机特征的锈蚀钢柱概率RFM，为既有锈蚀钢结构抗震性能评估提供了理论依据和数据支持。

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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来源期刊

Thin-Walled Structures 工程技术-工程：土木

CiteScore

9.60

自引率

20.30%

发文量

801

审稿时长

66 days

期刊介绍： Thin-walled structures comprises an important and growing proportion of engineering construction with areas of application becoming increasingly diverse, ranging from aircraft, bridges, ships and oil rigs to storage vessels, industrial buildings and warehouses. Many factors, including cost and weight economy, new materials and processes and the growth of powerful methods of analysis have contributed to this growth, and led to the need for a journal which concentrates specifically on structures in which problems arise due to the thinness of the walls. This field includes cold– formed sections, plate and shell structures, reinforced plastics structures and aluminium structures, and is of importance in many branches of engineering. The primary criterion for consideration of papers in Thin–Walled Structures is that they must be concerned with thin–walled structures or the basic problems inherent in thin–walled structures. Provided this criterion is satisfied no restriction is placed on the type of construction, material or field of application. Papers on theory, experiment, design, etc., are published and it is expected that many papers will contain aspects of all three.