Title:
Efficiency of Various Punching Shear Reinforcement Systems for Flat Slabs
Author(s):
Josef Hegger, Alaa G. Sherif, Dominik Kueres, and Carsten Siburg
Publication:
Structural Journal
Volume:
114
Issue:
3
Appears on pages(s):
631-642
Keywords:
code comparison; flat slabs; punching shear; punching shear reinforcement; punching shear systems; punching tests
DOI:
10.14359/51689434
Date:
5/1/2017
Abstract:
Over the last 20 years, the Institute of Structural Concrete at RWTH Aachen University has conducted numerous punching tests on interior slab-column connections with different types of punching shear reinforcement. Within the tests, different types and arrangements of stirrups, lattice girders, and double-headed studs were used as punching shear reinforcement. This paper summarizes the results of 39 punching tests and compares the punching shear resistances obtained from the tests with the punching shear capacity of flat slabs without punching shear reinforcement according to ACI 318-14 and Eurocode 2 along with the German Annex.
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. DIN EN 1992-1-1:2011-01, “Eurocode 2: Design of Concrete Structures – Part 1-1: General Rules and Rules for Buildings,” German version EN 1992-1-1:2004 + AC:2010, Berlin, Germany, 2011, 103 pp.
3. DIN EN 1992-1-1/NA:2013-04, “National Annex – National Determined Parameters – Eurocode 2: Design of Concrete Structures – Part 1-1: General Rules and Rules for Buildings,” German version EN 1992-1-1:2013-04, Berlin, Germany, 2014, 40 pp.
4. Ghali, A., and Dilger, W. H., “Anchoring with Double-Headed Studs,” Concrete International, V. 20, No. 11, Nov. 1998, pp. 21-24.
5. Beutel, R., and Hegger, J., “The Effect of Anchorage on the Effectiveness of Shear Reinforcement in the Punching Zone,” Cement and Concrete Composites, V. 24, No. 6, 2002, pp. 539-549. doi: 10.1016/S0958-9465(01)00070-1
6. Park, H.-G.; Ahn, K.-S.; Choi, K.-K.; and Chung, L., “Lattice Shear Reinforcement for Slab-Column Connections,” ACI Structural Journal, V. 104, No. 3, May-June 2007, pp. 294-303.
7. Fernández Ruiz, M., and Muttoni, A., “Applications of Critical Shear Crack Theory to Punching of Reinforced Concrete Slabs with Transverse Reinforcement,” ACI Structural Journal, V. 106, No. 4, July-Aug. 2009, pp. 485-494.
8. Chun, S. C.; Bohwan, O.; Lee, S. H.; and Naito, C. J., “Anchorage Strength and Behavior of Headed Bars in Exterior Beam-Column Joints,” ACI Structural Journal, V. 106, No. 5, Sept.-Oct. 2009, pp. 579-590.
9. Trautwein, L. M.; Bittencourt, T. N.; Gomes, R. B.; and Bella, J. C., “Punching Strength of Flat Slabs with Unbraced Shear Reinforcement,” ACI Structural Journal, V. 108, No. 2, Mar.-Apr. 2011, pp. 197-205.
10. Ferreira, M. P.; Guilherme, S. M.; Regan, R. E.; and Vollum, R. L., “Punching of Reinforced Concrete Flat Slabs with Double-Headed Shear Reinforcement,” ACI Structural Journal, V. 111, No. 2, Mar.-Apr. 2014, pp. 363-374.
11. Beutel, R., “Durchstanzen schubbewehrter Flachdecken im Bereich von Innenstützen,” PhD thesis, Institute of Structural Concrete, RWTH Aachen University, Aachen, Germany, 2003, 108 pp. (in German)
12. Hegger, J.; Beutel, R.; and Bertram, G., “Report of a Punching Test with Stirrups to Examine the Eurocode 2 Design Level of the Maximum Punching Shear Capacity – Specimen EM1,” Test Report 133/2005, Institute of Structural Concrete, RWTH Aachen University, Aachen, Germany, 2005.
13. Hegger, J.; Häusler, F.; and Ricker, M., “Maximum Punching Capacity of Flat Slabs,” Beton- und Stahlbetonbau, V. 102, No. 11, 2007, pp. 770-777. doi: 10.1002/best.200700584 (in German)
14. Häusler, F., “Zum maximalen Durchstanzwiderstand von Flachdecken mit und ohne Vorspannung,” PhD thesis, Institute of Structural Concrete, RWTH Aachen University, Aachen, Germany, 2009, 55 pp. (in German)
15. Hegger, J., and Siburg, C., “Versuchsbericht zu fünf Durchstanzversuchen (AP01 – AP05) zur Maximaltragfähigkeit der Ancoplus Doppelkopfanker,” Test Report 285/2012, Institute of Structural Concrete, RWTH Aachen University, Aachen, Germany, 2012. (in German)
16. Siburg, C.; Hegger, J.; Furche, J.; and Bauermeister, U., “Punching Shear Reinforcement for Semi Precast Slabs According to Eurocode 2,” Beton- und Stahlbetonbau, V. 109, No. 3, 2014, pp. 170-181. doi: 10.1002/best.201300075 (in German)
17. Ricker, M., and Häusler, F., “European Punching Design Provisions for Double-Headed Studs,” Structures and Buildings, V. 167, Aug. 2014, pp. 495-506.
18. Siburg, C., “Zur einheitlichen Bemessung gegen Durchstanzen in Flachdecken und Fundamenten,” PhD thesis, Institute of Structural Concrete, RWTH Aachen University, Aachen, Germany, 2014, 136 pp. (in German)