Title:
Performance of High-Strength Concrete Corbels
Author(s):
Stephen J. Foster, Rex E. Powell, and Hani S. Selim
Publication:
Structural Journal
Volume:
93
Issue:
5
Appears on pages(s):
555-563
Keywords:
brackets; corbels; high-strength concretes; shear properties;
structural design; trusses.
DOI:
10.14359/9714
Date:
10/1/1996
Abstract:
In this study, 30 high-strength concrete corbels were tested to destruction. Variables considered in the investigation are shear span-to-depth ratio, con-crete strength (45 to 105 MPa [6500 to 15,200 psi), and the provision of secondary reinforcement. The investigation examines corbel behavior in the context of the previous parameters and compares the experimental results with the ACI 318-89 design method and the plastic truss model of Rogowsky and MacGregor Particular attention is given to determining the concrete efficiency factor for members failing in compression, and the results are compared with the efficiency model proposed by Warwick and Foster: The results of the investigation show that good load predictions can be obtained using the plastic truss model when combined with the Warwick and Foster efficiency factor: It is concluded that the design method given in ACI 318-89 is not appropriate for corbels fabricated using high-strength concrete.