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Punching shear behavior of two-way coral-reef-sand concrete slab reinforced with BFRP composites
Highlights Compression failure mode of coral reef sand concrete (CRS). Factors affecting the punching behavior of two-way CRS concrete slabs. Comparison of punching behaviors between BFRP and steel reinforced slabs. Predictions of punching capacities with the punching shear models.
Abstract The basic mechanical properties of coral reef sand (CRS) concrete and the punching shear behavior of two-way CRS concrete slab reinforced with basalt fiber-reinforced polymer (BFRP) composites including bars and grids were investigated. A total of 54 CRS concrete cubes were designed for compression tests. The test parameters include water–cement ratio, cement grade, and aggregate gradation. Further, five two-way CRS concrete slabs reinforced with steel/BFRP bars/BFRP grids were produced to investigate the failure modes, the effects of the BFRP reinforcement ratio and type on the punching behavior. Finally, the punching capacities of the BFRP-reinforced CRS concrete slabs were predicted with different models. The results shows that the CRS concrete fails in the fracture of the coral reef aggregates. Compared with the steel-reinforced slab, no evident punching surface appears during the failure of the BFRP-reinforced slabs. The BFRP grid-reinforced slab exhibits a higher post-cracking stiffness and lower energy consumption than the BFRP bar-reinforced slab owing to the integrity of the BFRP grid. Moreover, the models of CAN/CSA S806-12 and EI-Gamal et al. (2005) reasonably predict the punching capacities of two-way CRS concrete slabs reinforced with BFRP.
Punching shear behavior of two-way coral-reef-sand concrete slab reinforced with BFRP composites
Highlights Compression failure mode of coral reef sand concrete (CRS). Factors affecting the punching behavior of two-way CRS concrete slabs. Comparison of punching behaviors between BFRP and steel reinforced slabs. Predictions of punching capacities with the punching shear models.
Abstract The basic mechanical properties of coral reef sand (CRS) concrete and the punching shear behavior of two-way CRS concrete slab reinforced with basalt fiber-reinforced polymer (BFRP) composites including bars and grids were investigated. A total of 54 CRS concrete cubes were designed for compression tests. The test parameters include water–cement ratio, cement grade, and aggregate gradation. Further, five two-way CRS concrete slabs reinforced with steel/BFRP bars/BFRP grids were produced to investigate the failure modes, the effects of the BFRP reinforcement ratio and type on the punching behavior. Finally, the punching capacities of the BFRP-reinforced CRS concrete slabs were predicted with different models. The results shows that the CRS concrete fails in the fracture of the coral reef aggregates. Compared with the steel-reinforced slab, no evident punching surface appears during the failure of the BFRP-reinforced slabs. The BFRP grid-reinforced slab exhibits a higher post-cracking stiffness and lower energy consumption than the BFRP bar-reinforced slab owing to the integrity of the BFRP grid. Moreover, the models of CAN/CSA S806-12 and EI-Gamal et al. (2005) reasonably predict the punching capacities of two-way CRS concrete slabs reinforced with BFRP.
Punching shear behavior of two-way coral-reef-sand concrete slab reinforced with BFRP composites
Wang, Xin (author) / Zhang, Xiaofei (author) / Ding, Lining (author) / Tang, Jie (author) / Wu, Zhishen (author)
2019-09-28
Article (Journal)
Electronic Resource
English
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