Concrete Breakout Strength of Anchors under Shear Loading

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Title: Concrete Breakout Strength of Anchors under Shear Loading

Author(s): Philipp Grosser, John Silva, Rolf Eligehausen, and Donald Meinheit

Publication: Structural Journal

Volume: 119

Issue: 6

Appears on pages(s): 259-273

Keywords: anchors; concrete edge breakout strength; design; experimental investigations; numerical investigations; oblique shear; shear loading

DOI: 10.14359/51734806

Date: 11/1/2022

Abstract:
This paper addresses the results of extensive experimental and numerical research on anchors loaded in shear close to the edge of a concrete member that was part of a doctoral dissertation published in 2012 (Grosser). The portion of the research that addresses concrete edge breakout of single anchors loaded in shear is described and the implications for code provisions addressing anchors in shear are discussed. Modified basic shear provisions are proposed for establishing the concrete breakout strength of anchors subjected to shear loading at an arbitrary angle of attack with respect to the near edge (oblique shear).

Related References:

1. Eligehausen, R.; Mallée, R.; and Silva, J., Anchorage in Concrete Construction, Ernst & Sohn, Berlin, Germany, 2006, 391 pp.

2. Fuchs, W., “Tragverhalten von Befestigungen unter Querlast in ungerissenem Beton (Load-Bearing Behavior of Fastenings Under Shear Loading in Uncracked Concrete),” dissertation, University of Stuttgart, Stuttgart, BW, Germany, 1990. (in German)

3. Hofmann, J., “Tragverhalten und Bemessung von Befestigungen unter beliebiger Querbelastung in ungerissenem Beton (Behaviour and Design of Anchorages Under Arbitrary Shear Load Direction in Uncracked Concrete),” dissertation, University of Stuttgart, Stuttgart, BW, Germany, 2005. (in German)

4. Anderson, N. S., and Meinheit, D. F., “Design Criteria of Headed Stud Groups in Shear: Final Report,” Report No. WJE 1996.0002, Wiss, Janney, Elstner Associates, Inc., Northbrook, IL, 2006.

5. ACI 318-19, “Building Code Requirements for Structural Concrete (ACI 318-19) and Commentary (ACI 318R-19), American Concrete Institute, Farmington Hills, MI, 2019, 624 pp.

6. Grosser, P., “Load-Bearing Behavior and Design of Anchorages Subjected to Shear and Torsion Loading in Uncracked Concrete,” dissertation, University of Stuttgart, Stuttgart, BW, Germany, 2012.

7. Fuchs, W.; Eligehausen, R.; and Breen, J., “Concrete Capacity Design (CCD) Approach for Fastening to Concrete,” ACI Structural Journal, V. 92, No. 1, Jan-Feb. 1995, pp. 73-94.

8. Bažant, Z. P., “Size Effect in Blunt Fracture: Concrete, Rock, Metal,” Journal of Engineering Mechanics, ASCE, V. 110, No. 4, 1984, pp. 518-535.

9. Ožbolt, J.; Li, Y.-J.; and Kožar, I., “Microplane Model for Concrete with Relaxed Kinematic Constraint,” International Journal of Solids and Structures, V. 38, No. 16, 2001, pp. 2683-2711.

10. Paschen, H., and Schönhoff, T., “Investigations on Shear Connectors Made of Reinforcing Steel Embedded in Concrete,” Betonwerk + Fertigteiltechnik, V. 48, No. 4, 1982, pp. 203-214.

11. Hofmann, J., and Eligehausen, R., “Tragfähigkeit von randnahen Kopfbolzen bei der Versagensart seitlicher Betonausbruch (Load Bearing Capacity of Headed Studs in Case of Blow Out Failure Mode),” Beton- und Stahlbetonbau, V. 104, No. 7, 2009, pp. 386-393. (in German)

12. Furche, J., “Zum Trag- und Verschiebungsverhalten von Kopfbolzen bei zentrischem Zug (Load-Bearing and Displacement Behavior of Headed Bolts under Centric Tension Load),” dissertation, University of Stuttgart, Stuttgart, Germany, 1994. (in German)

13. De Vries, R. A., “Anchorage of Headed Reinforcement in Concrete,” dissertation, The University of Texas at Austin, Austin, TX, 1996.

14. Asmus, J., “Bemessung von zugbeanspruchten Befestigungen bei der Versagensart Spalten des Betons (Design of Tension Loaded Anchorages for the Splitting Failure Mode),” dissertation, University of Stuttgart, Stuttgart, Germany, 1999. (in German)

15. Furche, J., and Eligehausen, R., “Lateral Blow-Out Failure of Headed Studs Near a Free Edge,” Anchors in Concrete—Design and Behavior, SP-130, G. A. Senkiw and H. B. Lancelot, eds., American Concrete Institute, Farmington Hills, MI, 1991, pp. 235-252.

16. ACI Committee 318, “Building Code Requirements for Structural Concrete (ACI 318-08) and Commentary (ACI 318R-08),” American Concrete Institute, Farmington Hills, MI, 2008, 473 pp.

17. Lee, N. H.; Park, K. R.; and Suh, Y. P., “Shear Behavior of Headed Anchors with Large Diameters and Deep Embedments,” ACI Structural Journal, V. 107, No. 2, Mar.-Apr. 2010, pp. 146-156.


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