Experimental Investigation on Corroded Cold-formed Thin-walled C-shaped Steels Short Columns under Axial Compression

被引：0

作者：

Xu S. ^{[1
]}

Sun J. ^{[1
,2
]}

机构：

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

[2] Shandong Province Metallurgical Engineering Co Ltd, Jinan

来源：

Hunan Daxue Xuebao/Journal of Hunan University Natural Sciences | 2021年 / 48卷 / 09期

基金：

中国国家自然科学基金;

关键词：

Axial compression; Cold-formed thin-walled C-shaped steel; Corrosion; Short column; Ultimate load;

D O I：

10.16339/j.cnki.hdxbzkb.2021.09.013

中图分类号：

学科分类号：

摘要：

This paper studies the influence of corrosion on the bearing capacity of cold-formed thin-walled C-shaped steel short columns under axial compression. Through the monotonic tensile test of the plate, the mechanical property degradation law of the corroded cold-formed thin-walled steel plate was studied. Five corroded cold-formed thin-walled columns were subjected to axial compression test. Failure mode, deformation characteristics and bearing capacity of the columns were analyzed. The calculation method of the ultimate load was discussed. The experimental results show that the yield platform of corroded steel becomes shorter or even disappears, and its yield strength decreases linearly with the increase of corrosion rates. The failure mode of the corroded C-shaped short column under axial compression is local buckling failure of the web, but local buckling occurs mostly at the weakest part of the web. The ultimate load decreases linearly with the increase of the average thickness loss rate. The effective width method and the direct strength method, considering the degradation of the mechanical properties of the corroded steel and thickness reduction, can predict the ultimate load of the C-shaped steel short columns under axial compression. However, the modified direct strength method is closer to the test results, and the modified effective width method is more conservative. © 2021, Editorial Department of Journal of Hunan University. All right reserved.

引用

页码：118 / 128

页数：10

共 26 条

[1] ZHANG Z Q., Design manual for cold-formed thin-walled steel structures, pp. 2-4, (1996)
[2] LI Y Q, XU H J., Research and development of cold-formed steel structures in China, Building Structure, 49, 19, pp. 91-101, (2019)
[3] PENG X, YANG N, WANG B, Et al., Experimental research and simulation on lipped channel under axial compression, Journal of Hunan University (Natural Sciences), 40, 8, pp. 34-39, (2013)
[4] SHI W Z, TONG L W, CHEN Y Y, Et al., Assessment of influence of steel corrosion on behavior of residential steel structures, Building Structure, 43, 16, pp. 88-92, (2013)
[5] QIU B, XU S H., Deterioration law of mechanical properties of corroded steel plates, Materials for Mechanical Engineering, 38, 10, pp. 60-63, (2014)
[6] YI W J, LEI G Q., Experimental research on the bearing capacity of corroded reinforced concrete columns, Journal of Hunan University (Natural Sciences), 35, 3, pp. 6-10, (2008)
[7] NIE B, XU S H., Research status and prospect of cold-formed steel corrossion, Journal of Taiyuan University of Technology, 50, 6, pp. 743-748, (2019)
[8] ZHANG S J, ZHAO D F, XING K T, Et al., Study on material mechanical performance of corroded cold-formed 2 millimetre thin-walled steel, Industrial Construction, 46, 4, pp. 114-119, (2016)
[9] XU S H, LI R, SU C, Et al., Mechanical property tests on cold-formed thin-walled steel materials with rust loss, Journal of Harbin Institute of Technology, 50, 12, pp. 74-80, (2018)
[10] XU S H, ZHANG Z X, LI R, Et al., Effect of cleaned corrosion surface topography on mechanical properties of cold-formed thin-walled steel, Construction and Building Materials, 222, pp. 1-14, (2019)

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