EXAMPLE 3.1: CORBEL AT COLUMN. IN: EXAMPLES FOR THE DESIGN OF STRUCTURAL CONCRETE WITH STRUT-AND-TIE MODELS

This paper describes a single corbel projecting from a 14-inch square column designed using the strut-and-tie method according to ACI 318-02 Appendix A. The corbel is to support a precast beam reaction force,, V-sub-u, of 56.2 kips (250 kN) acting at 4 in. from the column face. A horizontal tensile force, N-sub-uc, of 11.2 kips, is assumed to develop at the corbel top, accounting for creep and shrinkage deformations. Normal-weight concrete with a specified compressive strength, f'-sub-c, of 5 ksi is assumed. The yield strength of reinforcement, f-sub-y, is taken as 60 ksi. The corresponding shear span-to-depth ratio, a/d, is 0.24. A simple strut-and-tie model is selected to satisfy the code requirements. The main tie reinforcement provided is 5 #4 bars. These bars are welded to a structural steel angle of 3-1/2 in. x 3-1/2 in. x 1/2 in. Reinforcement details are given.

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Corporate Authors:
American Concrete Institute (ACI)

38800 Country Club Drive
Farmington Hills, MI United States 48331
Authors:
- Tjhin, T N
- Kuchma, D A
Conference:
- ACI Fall Convention
- Location: Phoenix, Arizona
- Date: 2002-10-27 to 2002-11-1
Publication Date: 2002

Language

English

Media Info

Features: Figures; References; Tables;
Pagination: p. 105-115

Subject/Index Terms

TRT Terms: Columns; Concrete structures; Design standards; Material reinforcement; Structural design; Structural engineering; Structural models; Structural supports; Strut and tie method
Uncontrolled Terms: Corbels
Subject Areas: Bridges and other structures; Design; Highways; Materials; Planning and Forecasting; I21: Planning of Transport Infrastructure; I24: Design of Bridges and Retaining Walls; I32: Concrete;

Filing Info

Accession Number: 00961721
Record Type: Publication
ISBN: 0870310860
Files: TRIS
Created Date: Aug 24 2003 12:00AM