|
Title |
Evaluation on the Bond Strength of Angle Embedded in Concrete
|
|
Authors |
최재경(Jae-Kyeong Choi) ; 양성주(Sung-Ju Yang) ; 김승훈(Seung-Hun Kim) |
|
DOI |
https://doi.org/10.11112/jksmi.2024.28.6.181 |
|
Keywords |
ㄱ형강; 푸쉬아웃 실험; 부착응력; 부착강도 L-shaped angle; Push-out test; Bond stress; Bond strength |
|
Abstract |
This study aimed to evaluate the bond strength of small L-shaped steel angles under varying concrete compressive strengths by conducting push-out tests. Specimen’s variables such as the type of angle, cover thickness, bond length, and concrete compressive strength were considered. The experimental results revealed three failure patterns: splitting failure, splitting crack and slip failure, and slip failure. As the bond area increased, the maximum load of specimens increased, but the experimental bond stress showed a slight decreasing trend. Additionally, when the cover thickness increased by 1.25 to 1.5 times, the average bond stress increased by approximately 9.4?21.0%. The average bond stress of the F1 series specimens (fck=31.4 MPa) was 1.14 MPa, with a standard deviation of 0.25 MPa, while that of the F2 series specimens (fck=47.7 MPa) was 1.33 MPa, with a standard deviation of 0.29 MPa. When the concrete compressive strength increased by approximately 51.9%, the average bond stress increased by about 16.7%. Based on the limited experimental results considering variables such as cover thickness, concrete compressive strength, and bond length, this study proposed a bond strength proposed equation consisting of the square root of the concrete compressive strength and a bond stress coefficient(0.1).
|