Axial compression performance of BFRP strip-PVC tube composite reinforced fiber recycled concrete short columns

doi:10.19936/j.cnki.2096-8000.20240628.012

Abstract

Abstract: To investigate the axial compressive performance of short columns of BFRP strip-PVC tube composite reinforced fiber recycled concrete. Axial compression tests and theoretical analysis were conducted on 13 groups of short columns of recycled concrete. The main variables studied were the number of BFRP strip layers (0, 1 and 3 layers), BFRP spacing (25 mm, 37.5 mm and 50 mm), and reinforcement methods (no lateral restraint, BFRP strip reinforcement, and BFRP strip-PVC tube composite reinforcement). The results show that the BFRP strip-PVC tube composite reinforcement can not only improve the ultimate bearing capacity of the specimens, but also improve the damage morphology of the short columns of fiber-reinforced concrete. In the nonlinear strengthening phase of the stress-strain curve, the influence of the reinforcement method on the stiffness of the specimen is more significant. With the increase of BFRP wrapping, the peak stress and ultimate strain of the specimens were significantly increased. The stress-strain calculation model of the softened section established based on the test data has better applicability.

Key words: fiber recycled concrete, BFRP strip-PVC tube, axial compression performance, stress-strain model, composite material

CLC Number:

TB332

XU Dongmei, LIU Huaxin, LI Yan. Axial compression performance of BFRP strip-PVC tube composite reinforced fiber recycled concrete short columns[J]. COMPOSITES SCIENCE AND ENGINEERING, 2024, 0(6): 95-105.

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