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Shear behavior of concrete shear walls with CFRP grids under lateral cyclic loading
Highlights Shear walls reinforced with CFRP grids showed less residual deformation compared to RC wall. Walls with horizontally laid CFRP grids exhibited higher load capacity and larger lateral drift. CFRP grids reduced the deformation concentration and limited the crack width. Horizontally laid CFRP grids were able to efficiently confine the concrete. Shear capacity calculation was proposed to compare to the experimental values.
Abstract Carbon fiber reinforced polymer (CFRP) is ideal for use in new construction owing to its light weight, high strength, and linear elasticity properties. CFRP grid is a common form of reinforcement that can enhance the structural integrity of components. In this study, six concrete shear walls, including one steel reinforced concrete (RC) wall and five walls reinforced with CFRP grids in two reinforcement configurations (vertically or horizontally laid), were tested until failure under cyclic loading. The comparison parameters include the aspect ratio, horizontal reinforcement ratio, and reinforcement configuration. The six specimens with aspect ratios of 1.0 and 1.4 experienced diagonal compression shear failure. The specimens with CFRP grids exhibited higher shear resistance in terms of a larger lateral drift, load capacity, strain, and less residual deformation, in particular, for walls with horizontal grids compared to conventional RC shear wall. The horizontally arranged CFRP grids significantly reduced the deformation concentration and improved the concrete confinement. Theoretical formulas based on the truss-arch model were developed to calculate the shear capacity of the concrete shear walls with CFRP grids.
Shear behavior of concrete shear walls with CFRP grids under lateral cyclic loading
Highlights Shear walls reinforced with CFRP grids showed less residual deformation compared to RC wall. Walls with horizontally laid CFRP grids exhibited higher load capacity and larger lateral drift. CFRP grids reduced the deformation concentration and limited the crack width. Horizontally laid CFRP grids were able to efficiently confine the concrete. Shear capacity calculation was proposed to compare to the experimental values.
Abstract Carbon fiber reinforced polymer (CFRP) is ideal for use in new construction owing to its light weight, high strength, and linear elasticity properties. CFRP grid is a common form of reinforcement that can enhance the structural integrity of components. In this study, six concrete shear walls, including one steel reinforced concrete (RC) wall and five walls reinforced with CFRP grids in two reinforcement configurations (vertically or horizontally laid), were tested until failure under cyclic loading. The comparison parameters include the aspect ratio, horizontal reinforcement ratio, and reinforcement configuration. The six specimens with aspect ratios of 1.0 and 1.4 experienced diagonal compression shear failure. The specimens with CFRP grids exhibited higher shear resistance in terms of a larger lateral drift, load capacity, strain, and less residual deformation, in particular, for walls with horizontal grids compared to conventional RC shear wall. The horizontally arranged CFRP grids significantly reduced the deformation concentration and improved the concrete confinement. Theoretical formulas based on the truss-arch model were developed to calculate the shear capacity of the concrete shear walls with CFRP grids.
Shear behavior of concrete shear walls with CFRP grids under lateral cyclic loading
Huang, Zhen (author) / Shen, Jie (author) / Lin, Huaquan (author) / Song, Xinyu (author) / Yao, Yiming (author)
Engineering Structures ; 211
2020-02-22
Article (Journal)
Electronic Resource
English
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