Proposal for ACI 318 Shear Design

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Title: Proposal for ACI 318 Shear Design

Author(s): Karl-Heinz Reineck

Publication: Concrete International

Volume: 39

Issue: 9

Appears on pages(s): 65-70

Keywords: force, truss, reinforcement, stirrups

DOI: 10.14359/51701017

Date: 9/1/2017

Abstract:
Shear design should not be regarded as a sectional design process (designers check that the applied shear force does not exceed the shear capacity in vertical sections of a beam). Instead, the design process should look at load transfer in the whole member. This is best done by using strut-and-tie models. In this article, truss models, valid for members with shear reinforcement as well as without, are described. The models are shown to provide very good agreement with test results.

Related References:

1. ACI Committee 318, “Building Code Requirements for Structural Concrete (ACI 318-14) and Commentary (ACI 318R-14),” American Concrete Institute, Farmington Hills, MI, 2014, 519 pp.

2. Reineck, K.-H., “Review of Basic Assumptions for the Shear Design,” Thomas T.C. Hsu Symposium: Shear and Torsion in Concrete Structures, SP-265, A. Belarbi, Y.L. Mo, and A. Ayoub, eds., American Concrete Institute, Farmington Hills, MI, 2009, pp. 367-384.

3. Leonhardt, F., and Walther, R., “Schubversuche an Einfeldrigen Stahlbetonbalken mit und ohne Schubbewehrung,” DAfStb (Deutscher Ausschuß für Stahlbeton) H.151, Berlin, Germany, 1962. (in German)

4. Leonhardt, F., and Walther, R., “Versuche an Plattenbalken mit hoher Schubbeanspruchung,” DAfStb H.152, Beuth Verlag, Berlin, Germany, 1962. (in German)

5. Reineck, K.-H., “Ein Mechanisches Modell für den Querkraftbereich von Stahlbetonbauteilen. (Mechanical Model for the Behavior of Reinforced Concrete Members in Shear),” PhD dissertation, Institut für Tragwerksentwurf und Konstruktion, Universität Stuttgart, Germany, 1990, 273 pp. (in German)

6. Reineck, K.-H., “Ultimate Shear Force of Structural Concrete Members without Transverse Reinforcement Derived from a Mechanical Model,” ACI Structural Journal, V. 88, No. 5, Sept.-Oct. 1991, pp. 592-602.

7. Kani, G.N.J., “The Riddle of Shear Failure and its Solution,” ACI Journal Proceedings, V. 61, No. 4, Apr. 1964, pp. 441-467, and Discussion, V. 61, Dec. 1964, pp. 1587-1636.

8. Kani, G.N.J., “Basic Facts Concerning Shear Failure,” ACI Journal Proceedings, V. 63, No. 6, June 1966, pp. 675-692, and Discussion, V. 63, Dec. 1966, pp. 1511-1528.

9. Fenwick, R.C., and Paulay, T., “Mechanisms of Shear Resistance of Concrete Beams,” Journal of the Structural Division, ASCE, V. 94, No. 10, Oct. 1968, pp. 2325-2350.

10. Taylor, H.P.J., “Investigation of the Forces Carried Across Cracks in Reinforced Concrete Beams in Shear by Interlock of Aggregate,” TR 42.447, Transport and Road Research Laboratory, Crowthorne, Berkshire, UK, Nov. 1970, 22 pp.

11. ACI-DAfStb, “Databases 2015 on Shear Tests for Evaluating Relationships for the Shear Design of Structural Concrete Members without and with Stirrups,” Report for Research Project DAfStb V. 479, K.-H. Reineck and D. Dunkelberg, eds., DAfStb H. 617, Beuth Verlag, Berlin, Germany, Mar. 2017, 748 pp.

12. Reineck, K.-H.; Kuchma, D.A.; and Fitik, B., “Erweiterte Datenbanken zur Überprüfung der Querkraftbemessung von Konstruktionsbetonbauteilen ohne und mit Bügel (Extended Databases with Shear Tests on Structural Concrete Beams without and with Stirrups for the Assessment of Shear Design Procedures),” DAfStb H. 597, Beuth Verlag, Berlin, Germany, 2012, 532 pp. (in German)

13. Loov, R.E., “ACI Quickfix: Proposal for a ACI Shear Equation to ACI Subcommittee 445-F,” University of Calgary, Calgary, AB, Canada, Jan. 14, 2003.

14. Reineck, K.-H., “Shear Design in Consistent Design Concept for Structural Concrete Based on Strut-and-Tie Models,” fib (Fédération Internationale du Béton) Bulletin No. 16, Jan. 2002, pp. 165-186.

15. Reineck, K.-H., “Hintergründe zur Querkraftbemessung in DIN 1045-1 für Bauteile aus Konstruktionsbeton mit Querkraftbewehrung,” Bauingenieur, V. 76, No. 4, 2001, pp. 168-179. (in German)

16. Kupfer, H.; Mang, R.; and Karavesyrouglou, M., “Bruchzustand der Schubzone von Stahlbeton- und Spannbetonträgern – eine Analyse unter Berücksichtigung der Rißverzahnung (Failure of the Shear-Zone of R.C.- and P.C.-Girders – an Analysis with Consideration of Interlocking of Cracks),” Bauingenieur, V. 58, 1983, pp. 143-149. (in German)

17. Kirmair, M., “Das Schubtragverhalten schlanker Stahlbetonbalken – Theoretische und Experimentelle Untersuchungen für Leicht- und Normalbeton,” PhD dissertation, Technical University of Munich, Munich, Germany, 1985. (in German)

18. Dei Poli, S.; Gambarova, P.G.; and Karakoç, C., “Aggregate Interlock Role in R.C. Thin-Webbed Beams in Shear,” Journal of Structural Engineering, ASCE, V. 113, No. 1, Jan. 1987, pp. 1-19.

19. Reineck, K.-H., and Hardjasaputra, H., “Zum Dehnungszustand bei der Querkraftbemessung profilierter Stahlbeton- und Spannbetonträger (State of Strain in the Shear Design of R.C.- and P.C.- Girders),” Bauingenieur, V. 65, No. 2, 1990, pp. 73-82. (in German)

20. FIP (Fédération Internationale de la Précontrainte) Commission 3, “Practical Design of Structural Concrete,” fib, Lausanne, Switzerland, 1999.

21. DIN 1045-1 (2001): Tragwerke aus Beton, Stahlbeton und Spannbeton, Teil 1: Bemessung und Konstruktion (Concrete, reinforced and prestressed concrete structures, Part 1: Design and construction), Deutsches Institut für Normung (DIN) e.V., Beuth Verlag, Berlin, Germany, 2001, pp. 1-148. (in German)