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Steel and Composite Structures Volume 42, Number 5, March10 2022 , pages 617-631 DOI: https://doi.org/10.12989/scs.2022.42.5.617 |
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Experimental and finite element analyses of eccentric compression of basalt-fiber reinforced recycled aggregate concrete-filled circular steel tubular stub column |
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Xianggang Zhang, Songpeng Zhang, Junna Yang, Xu Chen and Gaoqiang Zhou
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| Abstract | ||
| To study the eccentric compressive performance of the basalt-fiber reinforced recycled aggregate concrete (BFRRAC)-filled circular steel tubular stub column, 8 specimens with different replacement ratios of recycled coarse aggregate (RCA), basalt fiber (BF) dosage, strength grade of recycled aggregate concrete (RAC) and eccentricity were tested under eccentric static loading. The failure mode of the specimens was observed, and the relationship curves during the entire loading process were obtained. Further, the load-lateral displacement curve was simulated and verified. The influence of the different parameters on the peak bearing capacity of the specimens was analyzed, and the finite element analysis model was established under eccentric compression. Further, the design-calculation method of the eccentric bearing capacity for the specimens was suggested. It was observed that the strength failure is the ultimate point during the eccentric compression of the BFRRAC-filled circular steel tubular stub column. The shape of the load-lateral deflection curves of all specimens was similar. After the peak load was reached, the lateral deflection in the column was rapidly increased. The peak bearing capacity decreased on enhancing the replacement ratio or eccentric distance, while the core RAC strength exhibited the opposite behavior. The ultimate bearing capacity of the BFRRAC-filled circular steel tubular stub column under eccentric compression calculated based on the limit analysis theory was in good agreement with the experimental values. Further, the finite element model of the eccentric compression of the BFRRAC-filled circular steel tubular stub column could effectively analyze the eccentric mechanical properties. | ||
| Key Words | ||
| basalt fiber; eccentric compression; experimental study; finite element analyses; recycled aggregate; concrete-filled steel tube; ultimate bearing capacity | ||
| Address | ||
| Xianggang Zhang:School of Intelligent Construction, Wuchang University of Technology, Wuhan 430223, China/ School of Civil Engineering, Henan Polytechnic University, Jiaozuo 454003, China Songpeng Zhang:School of Civil Engineering, Henan Polytechnic University, Jiaozuo 454003, China Junna Yang:School of Civil Engineering, Henan Polytechnic University, Jiaozuo 454003, China/ School of Water Conservancy, North China University of Water Resources and Electric Power, Zhengzhou 450046, China Xu Chen:School of Civil Engineering, Henan Polytechnic University, Jiaozuo 454003, China Gaoqiang Zhou:School of Civil Engineering, Henan Polytechnic University, Jiaozuo 454003, China | ||