|
Title |
Experimental Study on the Punching Shear Strength of GFRP-Reinforced Concrete Slab?Column Connections: Investigation of Structural Behavior Based on Reinforcement Ratio and Column Size
|
|
Authors |
김시현(Si-Hyun Kim) ; 김훈민(Hoon-Min Kim) ; 최경규(Kyoung-Kyu Choi) |
|
DOI |
https://doi.org/10.4334/JKCI.2025.37.1.073 |
|
Keywords |
유리 섬유 보강근; GFRP 보강근; 뚫림전단; 슬래브-기둥 접합부 glass-fiber reinforcement polymer; GFRP bar; slab punching shear; slab?column connection |
|
Abstract |
This paper presents the results of punching shear tests conducted on three GFRP-reinforced concrete slab?column connections, with the reinforcement ratio of the slabs and column sizes as variables. The experimental results confirmed that as the GFRP reinforcement ratio increased, the punching shear strength of the specimens also increased. In contrast, as the column size and critical section length decreased, both deflection and punching shear strength decreased. Additionally, crack patterns and strains were analyzed based on the results observed in the experiments. The existing design equations for punching shear strength in ACI.440.11-22, JSCE, and CSA underestimated the punching shear strength, indicating that improvements are needed to more accurately account for variations in punching shear strength according to the GFRP reinforcement ratio and column size of the slabs.
|