EXAMPLE 3.2: DOUBLE CORBEL. IN: EXAMPLES FOR THE DESIGN OF STRUCTURAL CONCRETE WITH STRUT-AND-TIE MODELS
This paper describes a double corbel projecting from an interior column designed by use of the strut-and-tie method according to ACI 318-02 Appendix A. The corbel transfers precast beam reaction forces, V-sub-u, of 61.8 kips, acting at 6 in. from the face of the column at both ends. In order to account for beam creep and shrinkage deformations, a factored horizontal force, N-sub-uc, of 14.3 kips, is assumed to develop at each side of the corbel top. The column is 14 sq. in., and the upper column carries a factored compressive axial load, P-sub-u, of 275 kips. The compressive strength of concrete, f'-sub-c, and yield strength of steel reinforcement, f-sub-y, are taken as 4 and 60 ksi, respectively. Normal-weight concrete was assumed. Shear span to depth ratio, a/d, was 0.38. A simple strut-and-tie model was used for the design. The main tie reinforcement was 7 #4 bars. Anchorage and reinforcement dimensions and details are given and discussed.
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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
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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. 117-127
Subject/Index Terms
- TRT Terms: Anchors (Structural connectors); Columns; Concrete structures; Design standards; Material reinforcement; Structural design; Structural engineering; Structural models; Structural supports; Strut and tie method
- Uncontrolled Terms: Double 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: 00961722
- Record Type: Publication
- ISBN: 0870310860
- Files: TRIS
- Created Date: Aug 24 2003 12:00AM