Abstract
Punching shear tests on footings indicated that the inclination of compression struts is much steeper compared to flat slabs. The resulting steeper inclination of shear cracks leads to the assumption that vertically arranged punching shear reinforcement elements are less efficient in footings than in flat slabs. On that basis, a new punching shear reinforcement element with inclined bars was developed. At RWTH Aachen University, 14 punching shear tests on reinforced concrete footings including the new punching shear reinforcement elements were conducted. The test specimens partly failed inside the shear‐reinforced zone and at maximum load level. In spite of a reduction of total steel cross sectional area, the test specimens with the new punching shear elements showed a significant increase in punching shear capacity (40–50%) compared to previous test series. The new punching shear reinforcement system allows for a significant reduction of footing’s dimensions.
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References
ACI Committee 318 (2014). Building code requirements for structural concrete (ACI 318-14) and commentary (ACI 318R-14). American Concrete Institute, Farmington Hills, MI
Andrä HP (1981) Zum Tragverhalten von Flachdecken mit Dübelleisten-Bewehrung im Auflagerbereich. Beton- und Stahlbetonbau 76(3):53–57 (Part 1), 76(4):100–104 (Part 2)
Beutel R, Hegger J (2002) The effect of anchorage on the effectiveness of the shear reinforcement in the punching zone. Cement Concr Compos 24(6):539–549
Dieterle H, Rostásy FS (1987) Tragverhalten quadratischer Einzelfundamente aus Stahlbeton. Deutscher Ausschuss für Stahlbeton, Heft, p 387
Dieterle H, Steinle A (1981) Blockfundamente für Stahlbetonfertigstützen. Deutscher Ausschuss für Stahlbeton, Heft, p 326
DIN EN 1992-1-1:2011-01. Eurocode 2: Bemessung und Konstruktion von Stahlbeton- und Spannbetontragwerken – Teil 1-1: Allgemeine Bemessungsregeln und Regeln für den Hochbau. Deutsche Fassung EN 1992-1-1:2004 + AC:2010
DIN EN 1992-1-1/NA:2013-04. Nationaler Anhang – National festgelegte Parameter – Eurocode 2: Bemessung und Konstruktion von Stahlbeton- und Spannbetontragwerken – Teil 1-1: Allgemeine Bemessungsregeln und Regeln für den Hochbau. Deutsche Fassung EN 1992-1-1/NA: 2013-04
Einpaul J, Brantschen F, Fernández Ruiz M, Muttoni A (2016) Performance of punching shear reinforcement under gravity loading: influence of type and detailing. ACI Struct J 113(4):827–838
Elstner RC, Hognestad E (1956) Shearing strength of reinforced concrete slabs. J Am Concr Inst 28(1):29–58
Fernandez Ruiz M, Muttoni A (2009) Applications of critical shear crack theory to punching of reinforced concrete slabs with transverse reinforcement. ACI Struct J 106(4):485–494
Ferreira MP, Melo GS, Regan PE, Vollum RL (2014) Punching of reinforced concrete flat slabs with double-headed shear reinforcement. ACI Struct J 111(2):363–374
fib (Fédération international du béton) (2013). fib model code for concrete structures 2010. Ernst & Sohn, Berlin
Gardner NJ (1990) Relationship of the punching shear capacity of reinforced concrete slabs with concrete strength. ACI Struct J 87(1):66–71
Gesund H (1983) Flexural limit analysis of concentrically loaded column footings. ACI J Proc 80(3):223–228
Hallgren M, Kinnunen S (1996) Increase of punching shear capacity by using high strength concrete. In: Proceedings of 4th international symposium on utilization of high-strength/high-performance concrete, Paris
Hallgren M, Kinnunnen S, Nylander B (1998) Punching shear tests on column footings. Nord Concr Res 21(3):1–22
Hegger J, Häusler F, Ricker M (2007a) Zur maximalen Durchstanztragfähigkeit von Flachdecken. Beton- und Stahlbetonbau 102(11):770–777
Hegger J, Ricker M, Sherif AG (2009) Punching strength of reinforced concrete footings. ACI Struct J 106(5):706–716
Hegger J, Ricker M, Ulke B, Ziegler M (2007b) Investigations on the punching shear behaviour of reinforced concrete footings. Eng Struct 29(9):2233–2241
Hegger J, Sherif AG, Ricker M (2006) Experimental investigations on punching behavior of reinforced concrete footings. ACI Struct J 103(4):604–613
Kueres D, Siburg C, Herbrand M, Classen M, Hegger J (2017a) Uniform design method for punching shear in flat slabs and column bases. Eng Struct 136:149–164
Kueres D, Ricker M, Hegger J (2017b) Improved shear reinforcement for footings—punching strength inside shear-reinforced zone. ACI Struct J 114(6):1445–1456
Mokthar AS, Ghali A, Dilger W (1985) Stud shear reinforcement for flat concrete plates. ACI J Proc 82(5):676–683
Park H-G, Ahn K-S, Choi K-K, Chung L (2007) Lattice shear reinforcement for slab-column connections. ACI Struct J 104(3):294–303
Pilakoutas K, Li X (2003) Alternative shear reinforcement for reinforced concrete flat slabs. J Struct Eng 129(9):1164–1172
Ramdane KE (1996) Punching shear of high performance concrete slabs. In: Proceedings of 4th international symposium on utilization of high-strength/high-performance concrete, Paris
Regan PE (1986) Symmetric punching of reinforced concrete slabs. Mag Concr Res 38(136):115–128
Regan PE (2004) Punching of slabs under highly concentrated loads. Struct Build 157(2):165–171
Richart F (1948) Reinforced concrete wall and column footings. J Am Concr Inst 20(2):97–127 (Part 1), 20(3):237–261 (Part 2)
Ricker M, Häusler F (2014) European punching design provisions for double-headed studs. Struct Build 167(SB8):495–506
Siburg C (2014) Zur einheitlichen Bemessung gegen Durchstanzen in Flachdecken und Fundamenten. PhD thesis, RWTH Aachen University, Institute of Structural Concrete
Siburg C, Hegger J (2014) Experimental investigations on the punching behaviour of reinforced concrete footings with structural dimensions. Struct Concr 15(3):331–339
Talbot AN (1913) Reinforced concrete wall footings and column footings. Publications of the Engineering Experiment Station, Bulletin No, p 67
Acknowledgements
The investigations presented were supported by Deutsche Forschungsgemeinschaft (German Research Foundation, DFG-GZ HE 2637/21-1) and the authors wish to express their sincere gratitude.
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Ricker, M., Kueres, D., Häusler, F., Carminati, D., Hegger, J. (2020). New Punching Shear Reinforcement System for Footings and Ground Slabs. In: di Prisco, M., Menegotto, M. (eds) Proceedings of Italian Concrete Days 2018. ICD 2018. Lecture Notes in Civil Engineering, vol 42. Springer, Cham. https://doi.org/10.1007/978-3-030-23748-6_39
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