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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: Corbel at column
Author(s): Tjen N. Tjhin and Daniel A. Kuchma
Publication: Special Publication
Appears on pages(s): 105-116
Abstract:A single corbel projecting from a 14 in. (356 mm) square column is designed using the strut-and-tie method according to ACI 318-02 Appendix A. The corbel is to support a precast beam reaction force, Vu of 56.2 kips (250 kN) acting at 4 in,(102 mm) from the face of the column. A horizontal tensile force, Nuc of 11.2 kips (49.8 kN) is assumed to develop at the corbel top, accounting for creep and shrinkage deformations. The structure and the loads are described in Fig. (3.1-1). Normal-weight concrete with a specified compressive strength, fc of 5 ksi (34.5 MPa) is assumed. The yield strength of reinforcement, fy is taken as 60 ksi (414 MPa). The selected corbel dimensions including its bearing plate are shown in Fig. (3.1-2). The corresponding shear span to depth ratio, a/d, is 0.24. A simple strut-and-tie model shown in Fig. (3.1-3) is selected to satisfy the code requirements. The main tie reinforcement provided is 5 #4 (#13 mm) bars. These bars are welded to a structural steel angle of 31/2 in. x 31/2 in. x 1/2 in. (89 mm x 89 mm x 13 mm). The reinforcement details are shown in Fig. (3.1-5).
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