Numerical Investigation of the Axial Compressive Behavior of a Novel L-Shaped Concrete-Filled Steel Tube Column

被引:0
|
作者
Yang, Fujian [1 ,2 ]
Bao, Yi [1 ]
Du, Muzi [3 ]
Li, Xiaoshuang [1 ,2 ,4 ]
机构
[1] Changzhou Univ, Sch Urban Construct, Changzhou 213164, Peoples R China
[2] Key Lab Rock Mech & Geohazards Zhejiang Prov, Shaoxing 312000, Peoples R China
[3] CCCC Water Transportat Consultants Co Ltd, Beijing 100007, Peoples R China
[4] Qilu Inst Technol, Coll Civil Engn, Jinan 250200, Peoples R China
基金
中国国家自然科学基金;
关键词
L-shaped column; CFST columns; axial ratio; stress distribution; confinement effect; PLASTIC-DAMAGE MODEL; TUBULAR COLUMNS; PERFORMANCE;
D O I
10.3390/ma18040897
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
A novel L-shaped concrete-filled steel tube (CFST) column is proposed in this study. A finite element model of the column is developed using ABAQUS software to analyze its load transfer mechanism and axial compressive behavior. The effects of factors such as the steel strength, steel tube thickness, support plate configuration, and perforation of the support plates on the compressive performance of the column are investigated. The simulation results reveal that the column exhibits robust axial compressive performance. Increasing the steel strength and incorporating support plates (SP) effectively enhance the column's compressive bearing capacity and positively influence the bearing capacity coefficient (delta). However, increasing the steel tube thickness results in a reduction in delta, indicating that the rate of increase in the bearing capacity diminishes with increasing thickness. The failure mode is primarily characterized by local buckling in the midsection of the steel tube's concave corner. Measures such as increasing the steel strength and tube thickness and the use of support plates help to mitigate buckling at the concave corner, improve concrete confinement, and enhance the overall compressive performance of the column.
引用
收藏
页数:22
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