|
Title |
Shear Behavior of Prestressed Steel Fiber-Reinforced Concrete at Crack Interfaces
|
|
Authors |
갈경완 ; 황진하 ; 이득행 ; 김강수 ; 최일섭 |
|
Keywords |
강섬유 ; 프리스트레스 ; 콘크리트 ; 균열 ; 전단 전달 ; 구성방정식 Steel fiber ; SFRC ; Shear strength ; Shear reinforcement ; Compression zone |
|
Abstract |
Although structural concrete is well known for its good economic efficiency, it has limits of structural performance due to the low tensile strength, for which new structural members utilizing various concrete composite materials have been developed. Steel Fiber-Reinforced Concrete(SFRC) has great tensile strength, which is the one of the excellent composite material to complement the weakness of concrete, and it is also considered as a good alternative to prevent the explosive failure of high strength concrete under fire. Also, prestressed concrete members are of great advantages to long span structures and have greater shear strength compared to conventional reinforced concrete members. In this research, thus, a total of 22 direct shear test specimens were fabricated and tested to understand the shear behavior of Steel Fiber-Reinforced Prestressed Concrete(SFR-PSC) members, in which SFRC members combined with prestressing method. Based on the test results, the constitutive equations of shear behavior at crack interfaces were proposed, which provided good estimation on the shear behavior of the SFR-PSC direct shear test specimens.
|