Theoretical prediction of buckling deflection for I-shaped steel beams reinforced with bamboo scrimber stiffeners (BSSs)

IF 5.7 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures Pub Date : 2025-04-01 DOI:10.1016/j.tws.2025.113263

Zihan Gong , Yang Wei , Jiyang Yi , Jiawei Chen , Mingmin Ding , Hui Liu

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引用次数: 0

Abstract

In response to the buckling instability problem of I-shaped steel beams, a new method of using bamboo scrimber stiffeners (BSSs) to constrain the lateral-torsional buckling (LTB) of the steel beam is proposed. This method uses epoxy adhesive to combine BSSs and pure I-shaped steel beam (PIS) together to work synergistically. 12 full-scale beam specimens were tested and a series of refined finite element models (FEMs) corresponding to PIS and I-shaped steel beams reinforced with BSSs was established to investigate the Mises stress distribution in unstable regions that are difficult to obtain in experiments, which will contribute to buckling analysis. It was found that as the spacing between BSSs decreased, the moment enhancement in the critical buckling point was relatively small, ranging from 5.84 % to 11.94 %, as compared to PIS. However, the critical buckling deflection was significantly improved, with up to 167.40 % increase compared to PIS. Numerical and experimental results both show that BSSs alter the instability behavior of I-shaped steel beams, shifting rapid LTB failure to a slower lateral torsion of the web plate and localized buckling of compressed flanges between BSSs. To further expand the application scenarios, 17 additional simulation specimens were established to study the reinforcement effect of BSSs with varying lengths and quantities on beams with different clear spans. According to the experimental and numerical results, a critical buckling deflection prediction formula for I-shaped steel beam reinforced with BSSs was derived, which achieved good results and provided theoretical basis for practical engineering applications.

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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.