scholarly journals Punching Shear Strength Model for RC Slab-Column Connection Based on Multiaxial Strength Theory of Concrete

2016 ◽  
Author(s):  
H.Y. Pang ◽  
Z.J. Wang ◽  
C.T. Huang ◽  
S. Pu
Keyword(s):  
Shear Strength ◽  
Punching Shear ◽  
Strength Model ◽  
Strength Theory ◽  
Rc Slab

Punching Shear Strength Model for Reinforced Concrete Flat Slabs with Openings

2021 ◽  
Vol 147 (7) ◽  
Author(s):  
Marília G. Marques ◽  
Elyson A. P. Liberati ◽  
Ronaldo B. Gomes ◽  
Alessandra L. Carvalho ◽  
Leandro M. Trautwein
Keyword(s):  
Shear Strength ◽  
Reinforced Concrete ◽  
Punching Shear ◽  
Strength Model ◽  
Flat Slabs

Punching Shear Strength of Biaxial Hollow Slab with Donut Type Hollow Sphere

2010 ◽  
Vol 452-453 ◽  
pp. 777-780 ◽  
Author(s):  
Joo Hong Chung ◽  
Hyun Ki Choi ◽  
Seung Chang Lee ◽  
Chang Sik Choi
Keyword(s):  
Shear Strength ◽  
Hollow Sphere ◽  
Hollow Spheres ◽  
Critical Section ◽  
Punching Shear ◽  
Computation Method ◽  
Building Structures ◽  
Test Parameter ◽  
Test Parameters ◽  
Rc Slab

This paper presents the punching shear capacities of biaxial hollow slab with donut type hollow sphere. Recently, various types of slab systems which can reduce self-weight of slabs have been studied as the height and width of building structures rapidly increase. A biaxial hollow slab system is widely known as one of the effective slab system which can reduce self-weight of slab. According to previous studies, the hollow slab has weakness in slab-column connection. In addition, the present code does not provide a clear computation method for the punching shear strength of hollow slab. In this study, the special type of cage was used to improve punching shear capacities and fix the hollow spheres in critical section. To verify the punching shear capacities of this biaxial hollow slab, punching shear tests were performed. Four test specimens were used for test parameters. One was conventional RC slab and three were hollow slabs. The test parameter was the areas of critical section which were determined by the number of hollow spheres in critical section.

The Analysis of Punching Shear Strength for Concrete Slabs Based on the Unified Strength Theory

2014 ◽  
Vol 919-921 ◽  
pp. 1853-1859
Author(s):  
Ju Hong Han ◽  
Dun Bin Wang
Keyword(s):  
Shear Strength ◽  
Concrete Slab ◽  
Punching Shear ◽  
Theoretical Formula ◽  
Concrete Slabs ◽  
Strength Theory ◽  
Rigid Plastic ◽  
Unified Strength Theory ◽  
Reinforced Concrete Slabs ◽  
Good Agreement

Based on the mechanism of punching shear and patterns of failure of Specimen,using the unified strength theory and rigid-plastic models,the punching strength of reinforced concrete slabs supported on four sides is obtained.The theoretical formula of punching shear strength for concrete slab is given.The calculated results are in good agreement with the experimental results.

Critical shear crack theory-based punching shear model for FRP-reinforced concrete slabs

2020 ◽  
pp. 136943322097814
Author(s):  
Xing-lang Fan ◽  
Sheng-jie Gu ◽  
Xi Wu ◽  
Jia-fei Jiang
Keyword(s):  
Shear Strength ◽  
Reinforced Concrete ◽  
Shear Crack ◽  
Concrete Strength ◽  
Weight Ratio ◽  
Punching Shear ◽  
Concrete Slabs ◽  
Crack Theory ◽  
Reinforced Concrete Slabs ◽  
Rc Slabs

Owing to their high strength-to-weight ratio, superior corrosion resistance, and convenience in manufacture, fiber-reinforced polymer (FRP) bars can be used as a good alternative to steel bars to solve the durability issue in reinforced concrete (RC) structures, especially for seawater sea-sand concrete. In this paper, a theoretical model for predicting the punching shear strength of FRP-RC slabs is developed. In this model, the punching shear strength is determined by the intersection of capacity and demanding curve of FRP-RC slabs. The capacity curve is employed based on critical shear crack theory, while the demand curve is derived with the help of a simplified tri-linear moment-curvature relationship. After the validity of the proposed model is verified with experimental data collected from the literature, the effects of concrete strength, loading area, FRP reinforcement ratio, and effective depth of concrete slabs are evaluated quantitatively.

scholarly journals Punching Shear Strength of Reinforced Concrete Flat Plates with GFRP Vertical Grids

2021 ◽  
Vol 11 (6) ◽  
pp. 2736
Author(s):  
Min Sook Kim ◽  
Young Hak Lee
Keyword(s):  
Shear Strength ◽  
Reinforced Concrete ◽  
Fiber Reinforced Polymer ◽  
Punching Shear ◽  
Test Results ◽  
Shear Reinforcement ◽  
Flat Plates ◽  
Reinforced Polymer ◽  
Glass Fiber Reinforced ◽  
Vertical Grids

In this study, the structural behavior of reinforced concrete flat plates shear reinforced with vertical grids made of a glass fiber reinforced polymer (GFRP) was experimentally evaluated. To examine the shear strength, experiments were performed on nine concrete slabs with different amounts and spacings of shear reinforcement. The test results indicated that the shear strength increased as the amount of shear reinforcement increased and as the spacing of the shear reinforcement decreased. The GFRP shear reinforcement changed the cracks and failure mode of the specimens from a brittle punching to flexure one. In addition, the experimental results are compared with a shear strength equation provided by different concrete design codes. This comparison demonstrates that all of the equations underestimate the shear strength of reinforced concrete flat plates shear reinforced with GFRP vertical grids. The shear strength of the equation by BS 8110 is able to calculate the punching shear strength reasonably for a concrete flat plate shear reinforced with GFRP vertical grids.

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