Vol. 20, No. 2, pp. 199-207 (2024)
FLEXURAL BEHAVIOR OF REINFORCED HOLLOW HIGH STRENGTH
CONCRETE FILLED SQUARE STEEL TUBE
Zhi-Jian Yang *, Shu Zhang, Wei-Zhe Cui and Guo-Chang Li
School of Civil Engineering, Shenyang Jianzhu University, Shenyang, PR China
*(Corresponding author: E-mail:This email address is being protected from spambots. You need JavaScript enabled to view it.)
Received: 8 April 2024; Revised: 20 April 2024; Accepted: 5 June 2024
DOI:10.18057/IJASC.2024.20.2.12
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ABSTRACT
Flexural behavior of reinforced hollow high strength concrete filled square steel tube was studied through test and finite element analysis. Six specimens were designed to consider effects of steel ratio and reinforcement ratio. The failure modes, bending moment-curvature curve, load-strain curve and distribution of the deflection curves were analyzed. The results showed that the steel tube, PHC column, sandwich concrete can work well together subjected to bending moment. The change process of moment-curvature curve of specimen could be divided into three stages: elastic stage, elastic-plastic stage and hardening stage. The ultimate bearing capacity of the member increases with the increase of thickness of steel tube. The ultimate bearing capacity of member reinforced with deformed bars is higher than that of non-reinforcement. In addition, the three-dimensional finite element model was established by using ABAQUS software to analyze the behavior of members. Based on the experimental and numerical results, the simplified formula for calculating the flexural capacity of members was proposed. The calculated results are consistent well with the experimental results.
KEYWORDS
Reinforced hollow concrete filled square steel tube, High strength concrete, Flexural behavior, Load sharing
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