Numerical investigation of the flexural-torsional behaviour of built-up cold-formed steel beams

IF 5.7 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures Pub Date : 2025-03-08 DOI:10.1016/j.tws.2025.113183

Di Ma, Kim J.R. Rasmussen, Hao Zhang

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引用次数: 0

Abstract

This study examines the structural behaviour of built-up cold-formed steel (CFS) beams with and without lateral bracings, failing under four-point bending due to various buckling modes. The numerical models are developed using the Finite Element (FE) software ABAQUS 6.13. The models are discretised with S4R elements, end conditions are modelled as simply supported, and non-linear analyses are conducted which include material, geometric and contact non-linearities as well as geometric imperfections. The numerical models are validated by means of comparisons with published experimental results in terms of moment capacities, moment versus deflection curves and failure modes. Subsequently, using the verified FE models, a parametric study is carried out for different cross-section geometries and different thicknesses by varying the fastener spacings and fastener shear stiffness. The paper draws conclusions about the effectiveness of varying the fastener parameters for different built-up cross-sections, and presents a comprehensive database of ultimate strengths towards deriving design strength curves.

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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.