Vol. 16, No. 4, pp. 287-296 (2020)
EXPERIMENTAL AND THEORETICAL RESEARCH ON RCFT BEAM-COLUMNS
FABRICATED WITH Q420B HIGH-STRENGTH STEEL SUBJECTED TO ECCENTRIC LOAD
Zhi-Hua Chen 1, 2, Rui Ma 2, Yan-Sheng Du 2, 3, * and Ming Lian 4
1 State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin, China
2 School of Civil Engineering, Tianjin University, Tianjin, China
3 State Key Laboratory of Green Building in Western China, Xi’an University of Architecture & Technology, Xi’an, China
4 School of Civil Engineering, Xi′an University of Architecture and Technology, Xi′an,, China
* (Corresponding author: E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.)
Received: 24 February 2020; Revised: 20 June 2020; Accepted: 22 June 2020
DOI:10.18057/IJASC.2020.16.4.1
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ABSTRACT
This study is motivated by the widespread use of concrete - filled tubular (CFT) columns and the increasing use of high - strength steel (HSS). However, due to limited research, HSS was not extensively utilized in rectangular concrete - filled tubular (RCFT) columns. In this paper, the behavior of RCFT columns manufactured with Q420B HSS subjected to eccentric load was studied through the method of experimental and finite element (FE) analysis. The eccentric compression test was conducted on seventeen specimens with different concrete strength, width - to - thickness ratio, aspect ratio, and excentricity ratio. It obtained and discussed failure modes, load-vertical displacement curves, load-lateral deflection curves, and variations in strain. ABAQUS software developed nonlinear FE models based on an experimental program. Several specifications, including EC4, AISC360, AIJ, GB 50936-2014, and DB 29-57 for predicting the ultimate capacities of RCFT columns under excentric loading, were discussed through comparison with experimental results. The proposed approaches were also verified to be reasonably conservative for practical design with the experimental results.
KEYWORDS
Rectangular concrete-filled tubular columns, Experiment investigation, Finite element analysis, Design approach, High-strength steel
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