Simplified Direct Strength Method for the design of cold-formed steel channels with circular web openings under two-flange loadings

被引：7

作者：

Wang, Wei ^{[1
]}

Roy, Krishanu ^{[1
]}

Ananthi, G. Beulah Gnana ^{[2
]}

Lu, Linfeng ^{[3
]}

Fang, Zhiyuan ^{[1
]}

Lim, James B. P. ^{[1
]}

机构：

[1] Univ Waikato, Sch Engn, Hamilton, New Zealand

[2] Anna Univ, Coll Engn Guindy Campus, Div Struct Engn, Chennai, India

[3] Changan Univ, Sch Civil Engn, Xian, Peoples R China

来源：

ENGINEERING STRUCTURES | 2024年 / 319卷

关键词：

Circular web openings; Cold-formed steel; Direct strength method; Yield line models; PART I TESTS; CRIPPLING BEHAVIOR; SECTIONS; HOLES; BEAMS;

D O I：

10.1016/j.engstruct.2024.118840

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Previous studies have put forward reduction factor equations to determine the web crippling strength of coldformed steel (CFS) channels with circular web openings. However, these equations overlook vital parameters such as material yield strength, flange width, and fillet radius of CFS channels. Consequently, this paper introduces simplified Direct Strength Method (DSM) equations, which account for plastic loads (Py) and elastic buckling loads (Pcr), integrating the aforementioned crucial parameters. Eight unique yield line models were devised, considering two-flange loadings: interior-two-flange (ITF) and end-two-flange (ETF), as well as the positioning of circular web openings, to compute the yield line length for Py. Similarly, new Pcr equations were also proposed. The reliability of the proposed equations was evaluated using a dataset of 236 test results sourced from the literature. This assessment aims to demonstrate the suitability of the equations for incorporation into future revisions of international design codes.

引用

页数：16

共 36 条

[31] Consistent and Simplified Direct Strength Method for Design of Cold-Formed Steel Structural Members under Localized Loading [J].