Experimental investigation on compressive bearing capacity of cold-formed thin-walled lipped channel short columns with corrosion

被引：0

作者：

Xu J.-M. ^{[1
,2
]}

Xing K.-T. ^{[1
]}

Gao X.-Y. ^{[2
]}

Xu S.-H. ^{[3
]}

Guo X.-H. ^{[1
]}

Nie B. ^{[3
]}

机构：

[1] Central Research Institute of Building and Construction Co. Ltd, MCC Group, Beijing

[2] Beijing Key Lab of Earthquake Engineering and Structural Retrofit, Beijing University of Technology, Beijing

[3] School of Civil Engineering, Xi'an University of Architecture and Technology, Xi'an

来源：

Gongcheng Lixue/Engineering Mechanics | 2021年 / 38卷 / 04期

关键词：

Bearing capacity test; Buckling mode; Cold-formed thin-walled steel; Compression member; Corrosion;

D O I：

10.6052/j.issn.1000-4750.2020.06.0376

中图分类号：

学科分类号：

摘要：

To investigate the effect of corrosion on the compressive bearing capacity of cold-formed thin-walled steel short columns, six specimens under axial compression and six specimens under eccentric compression around strong axes were designed and processed. First, the relationship between the mechanical properties of materials and the degree of corrosion was analyzed through tensile tests. Then, the bearing capacity tests of specimens were carried out, and the failure modes and ultimate load-bearing capacity were analyzed. The results show that the yield, tensile strength, modulus of elasticity and the elongation of corroded steel decrease linearly with the increase of corrosion degree. The corrosion of steel does not change the final failure mode of the short column specimens, but with the increase of eccentricity, the local buckling of the web becomes a coupling failure mode dominated by distortion buckling. Under the same corrosion rate, the ultimate bearing capacity of axially compressed specimens degrades more obviously than that of eccentrically compressed specimens. The ABAQUS finite element software was used to simulate the specimens. The results show that the ABAQUS software can better predict the bearing capacity and buckling behavior of the specimens. Copyright ©2021 Engineering Mechanics. All rights reserved.

引用

页码：191 / 199and210

共 22 条

[21] Chen Ming, Zhou Xuhong, Liu Zhanke, Et al., Experimental investigation of web-stiffened cold-formed lipped channel columns, Journal of Building Structures, 38, 2, pp. 37-47, (2017)
[22] Dubina D, Ungureanu V., Effect of imperfections on numerical simulation of instability behaviour of cold-formed steel members, Thin-Walled Structures, 40, 3, pp. 239-262, (2002)

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