EXPERIMENTAL STUDY OF UNLIPPED CHANNEL BEAMS SUBJECT TO WEB CRIPPLING UNDER ONE FLANGE LOAD CASES

IF 1.7 3区工程技术 Q3 CONSTRUCTION & BUILDING TECHNOLOGY

Advanced Steel Construction Pub Date : 2019-05-30 DOI:10.18057/IJASC.2019.15.2.6

S. Gunalan, M. Mahendran

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引用次数: 22

Abstract

Cold-formed steel members are becoming increasingly popular in the building industry due to their superior strength to weight ratio and ease of fabrication as opposed to hot-rolled steel members. However, they are susceptible to various buckling modes at stresses below the yield stress of the member because of their relatively high width-to-thickness ratio. Web crippling is one of the failure modes that occurs in steel channel sections under transverse concentrated loads or reactions. Recently a test method has been proposed by AISI to obtain the web crippling capacities under both one-flange and two-flange load cases. Using this test method 21 tests were conducted in this research to investigate the web crippling behaviour and strengths of an unlipped channel section with stocky webs known as DuraGal Channels under end-one-flange (EOF) and interior one-flange (IOF) load cases. DuraGal channels with different web slenderness and bearing lengths were tested with their flanges unfastened to supports. In this research the suitability of the currently available design rules for unlipped channels subject to web crippling under one flange load cases was investigated, and suitable modifications were proposed where necessary. This paper presents the details of this experimental study and the results.

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单翼缘荷载作用下无梁腹板破坏的试验研究

与热轧钢构件相比，冷成型钢构件由于其优越的强度重量比和易于制造而在建筑行业中越来越受欢迎。然而，由于其相对较高的宽厚比，它们在低于构件屈服应力的应力下容易受到各种屈曲模式的影响。腹板破坏是在横向集中荷载或反作用力作用下，槽钢截面发生的破坏模式之一。最近，AISI提出了一种测试方法，以获得在一个法兰和两个法兰载荷情况下的腹板破坏能力。使用该试验方法，本研究进行了21次试验，以研究在端部单法兰（EOF）和内部单法兰（IOF）荷载情况下，具有结实腹板的无顶棚通道段（称为DuraGal通道）的腹板破坏行为和强度。对具有不同腹板长细比和支承长度的DuraGal通道进行了测试，其法兰未固定在支架上。在这项研究中，研究了目前可用的设计规则对在一个翼缘荷载情况下承受腹板破坏的无盖渠道的适用性，并在必要时提出了适当的修改建议。本文介绍了这项实验研究的细节和结果。

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

Advanced Steel Construction CONSTRUCTION & BUILDING TECHNOLOGY-ENGINEERING, CIVIL

CiteScore

2.60

自引率

29.40%

发文量

审稿时长

6 months

期刊介绍： The International Journal of Advanced Steel Construction provides a platform for the publication and rapid dissemination of original and up-to-date research and technological developments in steel construction, design and analysis. Scope of research papers published in this journal includes but is not limited to theoretical and experimental research on elements, assemblages, systems, material, design philosophy and codification, standards, fabrication, projects of innovative nature and computer techniques. The journal is specifically tailored to channel the exchange of technological know-how between researchers and practitioners. Contributions from all aspects related to the recent developments of advanced steel construction are welcome.