Overall buckling behaviour of stainless-clad bimetallic steel welded box section columns

IF 5.7 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures Pub Date : 2025-04-22 DOI:10.1016/j.tws.2025.113361

Huiyong Ban , Pingyu Zhao , Zhuo Zeng , Yuanqing Wang

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Abstract

Stainless-clad (SC) bimetallic steel is a new high-performance steel, composed of a substrate layer (conventional mild (CM) steel) and a cladding layer (stainless steel) which are bonded metallurgically together. It is beneficial to both favourable performance and competitive cost. This paper presents an experimental programme to investigate the overall buckling behaviour of SC bimetallic steel columns. Six welded box section columns were tested while the initial imperfections such as geometric imperfections and residual stresses were measured. Based on the column test results, the buckling mode, deformation, capacity, stress and strain of section were investigated. It was found that the capacity of SC bimetallic steel columns herein was higher than that of single metal columns. A 3D finite element model was established and validated against the test data in present study as well as in previous related references. Using the finite element model, columns with varied sections, lengths, clad ratios and steel strength grades were calculated and their buckling capacities were compared with the design value of the single metal columns. Based on the theoretical analysis on buckling behaviour, the definition of the buckling criterion for such SC bimetallic steel was proposed and corresponding column design curves were suggested.

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不锈钢包层双金属钢焊接箱式截面柱的整体屈曲行为

不锈钢包层（SC）双金属钢是一种新型高性能钢，由基材层（传统软钢）和包层（不锈钢）用冶金方法粘合在一起而成。它有利于良好的性能和具有竞争力的成本。本文提出了一种研究SC双金属钢柱整体屈曲行为的实验方案。对6根焊接箱形截面柱进行了试验，并测量了几何缺陷和残余应力等初始缺陷。根据柱试验结果，对截面的屈曲模式、变形、承载力、应力和应变进行了研究。结果表明，SC双金属钢柱的承载力高于单金属柱的承载力。建立了三维有限元模型，并根据本研究及相关文献的试验数据进行了验证。利用有限元模型对不同截面、长度、包层比和钢强度等级的柱进行了计算，并将其屈曲能力与单金属柱的设计值进行了比较。在理论分析屈曲行为的基础上，提出了这类SC双金属钢屈曲准则的定义，并给出了相应的柱设计曲线。

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.