Local-global buckling behaviours of axially compressive welded I-section steel columns with local corrosion

IF 5.7 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures Pub Date : 2025-03-25 DOI:10.1016/j.tws.2025.113239

Xinhao Han , Chen Jia , Qing Hu , Changyong Liu , Tianhao Xiang

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引用次数: 0

Abstract

Welded I-section steel exposed to harsh environments is highly susceptible to corrosion, with local corrosion being particularly common and detrimental. Local corrosion causes uneven changes in plate thickness, leading to increased stress concentration and premature buckling in corroded regions, and a subsequent compromise in the stability. However, the influence of local corrosion on the buckling behaviours has not been clarified in prior research. This paper addresses this gap by designing and testing 12 welded I-section steel columns with simulated local corrosion (varying slenderness ratios, corrosion locations, corrosion depths and corrosion dimensions) under axial compression. Electrochemical accelerated corrosion tests were conducted to effectively simulate local corrosion, and the corrosion morphology was assessed using three-dimensional scanning technology. Axial compression tests were then conducted to study the influence of local corrosion on failure modes, load-displacement curves and cross-sectional strain development of corroded steel columns. Additionally, finite element (FE) models incorporating the scanned corrosion morphology were established and validated against test results for parametric analysis. The key parameters included geometric dimensions (slenderness ratio, width-to-thickness ratio, and thickness ratio) and corrosion region characteristics (location, depth, and dimension). Both experimental and numerical results revealed that local corrosion altered the buckling modes and decreased the residual resistance of the welded I-section steel columns under axial compression. Furthermore, the equivalent thickness and initial eccentricity coefficient were defined and incorporated into the existing codified approaches for predicting the residual resistance of welded I-section steel columns with local corrosion under axial compression.

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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.