Evaluation of shear strength design methodologies for slender shear-critical RC beams
Date of Issue2012
School of Civil and Environmental Engineering
This paper seeks to examine the concrete contribution to shear strength, and determine the inclination of the compressive strut within the variable truss model for slender reinforced concrete (RC) shear-critical beams with stirrups. Utilizing the Modified Compression Field Theory (MCFT) in place of the conventional statistical regression of experimental data, the expression for the concrete contribution to shear strength was derived and the inclination of compressive struts determined. A simplified explicit expression for shear strength was then provided, with which shear strength can be calculated without extensive iterative computations. This method was then verified using the available experimental data of 209 RC rectangular beams with stirrups and compared to the current methods in ACI 318R-08 and CSA-04. The theoretical results are shown to be consistent with the experimentally observed behavior of shear-critical RC beams.
Journal of structural engineering
© 2012 American Society of Civil Engineers. This is the author created version of a work that has been peer reviewed and accepted for publication by Journal of Structural Engineering, American Society of Civil Engineers. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [http://dx.doi.org/10.1061/(ASCE)ST.1943-541X.0000634].