With the addition of the new Appendix A on strut-and-tie models in ACI 318-02, “Building Code Requirements for Structural Concrete,” engineers have an alternative code procedure for designing structural concrete members where the usual sectional design assumptions for flexure and shear do not apply.
ACI SP-208 contains selected papers presented at the 2002 ACI Fall Convention by members of ACI Subcommittee 445-A, Shear and Torsion: Strut-and-Tie Models. This publication shows engineers how to apply strut- and-tie modeling in accordance with Appendix A. The papers also trace the development of Appendix A of ACI 318-02 and summarize important tests that confirm strut-and-tie modeling as a rational basis for the design of structural concrete.
Most of the examples have been taken from practice. In addition to explaining the approach of determining a model, they point out where problems can occur in dimensioning or in detailing and anchoring of the reinforcement and how the design can be improved.
Table of Contents
Part 1: Introduction
Part 2: Derivation of strut and tie models for the 2002 ACI Code
Part 3: Experimental verification of strut and tie models
Part 4: Examples
Example 1a: Deep beam design in accordance with ACI 318-2002
Example 1b: Alternative design for the non slender beam (deep beam)
Example 2: Dapped end T-beam supported by an inverted T-beam
Example 3.1: Corbel at column
Example 3.2: Double corbel
Example 4: Deep beam with opening
Example 5: Beam with indirect support and loading
Example 6: Prestressed beam
Example 7: Strut and tie model cable stayed bridge pier table
Example 8: High wall with two openings
Example 9: Pile Cap
Part 5: Modeling structural concrete with strut and tie models summarizing discussion of the examples as per Appendix A of ACI 318-2002