Title: Database of Shear Tests for Non-slender Reinforced Concrete Beams without Stirrups

Author(s): Karl-Heinz Reineck and Leonardo Todisco

Publication: Commentary Reference

Volume:

Issue:

Appears on pages(s): 1363-1372

Keywords: beams; database; reinforced concrete; shear reinforcement; shear slenderness; shear strength; shear tests; strut-and-tie models

DOI:

Date: 11/1/2014

Abstract:
A database is presented with shear tests on non-slender beams without stirrups subjected to point loads with shear span to effective depth ratios (a/d) < 2.4. From the 338 collected shear tests, 222 tests remained for the evaluations after several selection criteria were applied. The tests were compared with the left part of the shear valley by Kani and did not confirm the strength increase up to the flexural strength in the range from a/d = 2.4 to approximately 1.0. The capacities of the simple strut-and-tie model according to Appendix A of ACI 318-11 were compared with these tests and the results were unconservative. The reduction factor for the strength of the unreinforced struts should be reduced to βs = 0.42 instead of 0.60 for a strut without reinforcement, such as the inclined strut transferring the load to the support for a point load near an end support.