Experimental study and numerical analysis on compressive behavior of three-limb built-up cold-formed steel columns with double box section

被引：2
|
作者：
Nie S. [1 ]
Zhou T. [1 ]
Zhou X. [2 ]
Zuo X. [1 ]
Ye M. [1 ]
机构：
[1] School of Civil Engineering, Chang'an University, Xi'an
[2] School of Civil Engineering, Chongqing University, Chongqing
来源：
Dongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Southeast University (Natural Science Edition) | 2019年 / 49卷 / 01期
关键词：
Cold-formed thin-walled steel; Maximum bearing capacity; Parameter analysis; Three-limb built-up column with double boxes section;
D O I：
10.3969/j.issn.1001-0505.2019.01.004
中图分类号：
学科分类号：
摘要：
Experimental study and numerical simulation on 12 three-limb built-up columns with double boxes section were carried out to study the compressive behavior under axial and eccentric loading. The load-displacement curves, the load-strain curves and the maximum bearing capacity of the specimens were obtained through the experimental study. The buckling modes and the failure characteristics were analyzed. The finite element software ABAQUS was used to analyze the influence of the slenderness ratio of the columns, the web height to thickness ratio of the section, the eccentricity and the direction of the loading on the compressive behavior of the built-up cold-formed steel columns with double box section. The results show that the final failure mode of the LT-A(long length columns) and MT-A(middle length columns) group specimens are overall flexural buckling damage. Most of the damage locations are in the mid-height of columns, except for the individual specimens of MT-A group. The maximum bearing capacity of the specimens decreases with the increase of the slenderness ratio of the columns. The maximum bearing capacity of the specimens increases with the decrease of the height thickness ratio of the web. The maximum bearing capacity of the specimens under eccentric compression decreases with the increase of the eccentricity. © 2019, Editorial Department of Journal of Southeast University. All right reserved.
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页码：25 / 33
页数：8
相关论文
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