|
Title |
Shear Strength Estimation Model for Reinforced Concrete Members
|
|
Authors |
이득행(Deuckhang Lee) ; 한선진(Sun-Jin Han) ; 김강수(Kang Su Kim) |
|
DOI |
https://doi.org/10.11112/jksmi.2020.24.5.1 |
|
Keywords |
전단균열; 골재 맞물림; 비손상 압축측; 전단기여; 부착; 균열폭 shear crack; aggregate interlocking; compression zone; bond |
|
Abstract |
This study presents a shear strength estimation model, in which the shear failure of a reinforced concrete (RC) member is assumed to be governed by the flexure-shear mechanism. Two shear demand curves and corresponding potential capacity curves for cracked tension and uncracked compression zones are derived, for which the bond mechanism developed between reinforcing bars and surrounding concrete is considered in flexural analysis. The shear crack concentration factor is also addressed to consider the so-called size effect induced in large RC members. In addition,unlike exising methods, a new formulation was addressed to consider the interaction between the shear contributions of concrete and stirrup. To verify the proposed method, an extensive shear database was established, and it appeared that the proposed method can capture the shear strengths of the collected test specimens regardless of their material properties, geometrical features, presence of stirrups, and bond characteristics.
|