Web crippling of stainless steel built-up sections subjected to interior-two-flange loading

IF 5.7 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures Pub Date : 2025-05-10 DOI:10.1016/j.tws.2025.113427

Yannan Jing , Shuai Li , Ke Jiang , Ou Zhao

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引用次数: 0

Abstract

A built-up section is a composite section assembled from at least two component sections using screws, welds or bolts, providing good load-carrying capacity, optimised cross-section properties and high material efficiency. This paper focuses on the web crippling behaviour and resistances of stainless steel built-up I-sections and box-sections under Interior-Two-Flange (ITF) concentrated transverse loading. An experimental programme was firstly conducted on 23 stainless steel built-up section specimens subjected to ITF loading, including fourteen specimens with I-sections and nine specimens with box-sections. A numerical modelling programme was also performed to investigate the web crippling behaviour of stainless steel built-up sections with wide ranges of screw arrangements, cross-section dimensions and bearing lengths. Finite element (FE) models were validated against the experimental data, confirming the capability of the FE models to accurately replicate the ITF loading test results. After validation of the FE models, parametric studies were conducted to generate additional numerical data. The experimental and numerical data were then used to assess the current American specification and European code for designing stainless steel built-up sections under ITF loading. The assessment results revealed that the American specification offered overall accurate failure load predictions though some were unsafe, while the European code provided excessively conservative and scattered failure load predictions. Hence, an improved design approach was proposed and considered the effects of the screw arrangements and material properties of stainless steel, offering accurate, consistent and safe failure load predictions of stainless steel built-up sections under ITF loading.

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不锈钢组合式构件在内部双法兰载荷作用下腹板开裂

组合截面是由至少两个组成部分使用螺钉，焊接或螺栓组装而成的复合截面，具有良好的承载能力，优化的截面性能和高材料效率。本文主要研究了不锈钢组合式工字截面和箱式截面在集中横向荷载作用下的腹板破坏行为和阻力。首先对23个受ITF加载的不锈钢组合截面试件进行了试验方案设计，其中工字截面试件14个，箱形截面试件9个。数值模拟程序也被执行，以调查具有宽范围的螺杆布置，横截面尺寸和轴承长度的不锈钢组合截面的腹板破坏行为。根据试验数据对有限元模型进行了验证，证实了有限元模型能够准确地复制ITF加载试验结果。在验证有限元模型后，进行参数研究以产生额外的数值数据。采用试验和数值数据，对当前美国规范和欧洲规范对不锈钢组合截面在荷载作用下的设计进行了评估。评估结果表明，美国规范提供了总体上准确的破坏荷载预测，但有些不安全，而欧洲规范提供了过于保守和分散的破坏荷载预测。因此，提出了一种改进的设计方法，并考虑了不锈钢螺杆排列和材料性能的影响，提供了准确、一致和安全的不锈钢组合截面在ITF载荷下的失效载荷预测。

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.