Buckling behavior and design of large-size and high-strength steel angle under combined compression and biaxial bending

IF 5.7 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures Pub Date : 2025-03-06 DOI:10.1016/j.tws.2025.113124

Yun Sun , Da Song , Shuxuan Sun , Yaojie Guo , Quan Zhao

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引用次数: 0

Abstract

This paper aims to investigate the behavior of large-size and high-strength steel angle (LHS) components under combined biaxial bending and axial compression. A theoretical analysis for angle sections subjected to combined action and the plastic development coefficient calculation method was performed. The behavior of 28 Q420 LHS beam-column components was tested, and the finite element model was developed and validated against the test result. The comprehensive parametric study was adopted to perform LHS beam-column components with different material grades, cross section sizes, slenderness ratios and loading eccentricities. Numerical results obtained from the parametric study were compared with the current design codes to provide accurate prediction of design strength. The research findings indicate that the angle section's elastic design approach is rather conservative, possessing a degree of plastic reserve. The eccentricity can alter the LHS beam-column components' failure mode, and the critical eccentricity characteristic becomes less apparent as the biaxial eccentricity increases. The proposed modified design formula for LHS components under combined action, can achieve reliable and accurate design predictions.

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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.