Title:
Headed Shear Reinforcement Assemblies for One-Way Shear
Author(s):
Adam S. Lubell, Evan C. Bentz, and Michael P. Collins
Publication:
Structural Journal
Volume:
106
Issue:
6
Appears on pages(s):
878-886
Keywords:
beams; cracking; deflection; headed shear reinforcement; one-way shear; reinforced concrete; slabs
DOI:
10.14359/51663189
Date:
11/1/2009
Abstract:
It has been shown previously that the use of shear reinforcement improves the strength and ductility of large beams and thick slabs. The corresponding impact on member constructibility and economy from provisions of code-specified minimum shear reinforcement ratios can be significant. In this paper, the viability of a system of headed shear reinforcement assemblies for one-way shear is examined. Three large-scale laboratory tests were conducted on members containing high-strength longitudinal reinforcement and headed shear stud assemblies of varying configurations. Member performance at the serviceability and ultimate limit states were examined and compared against predictions in accordance with design code models for flexure, shear, and deflection. Member capacity was predicted well by existing models, but significantly larger-than-predicted deflections occurred due to shear deformations associated with diagonal cracking and the smooth shear reinforcement legs.