Nonlinear finite element analysis of punching shear strength of reinforced concrete slabs supported on L-shaped columns

• Autorzy: Zhang Qing , Milligan Graeme J. , Polak Maria Anna

Identyfikatory

DOI

10.35784/bud-arch.2122

• Języki publikacji: EN

Abstrakty

EN

Most current concrete design codes include provisions for punching shear of reinforced concrete slabs supported on columns with L, T, and cruciform shapes. Reference studies verifying the accuracy of these code provisions are typically not provided. Empirical data of punching failures of slabs supported on columns with L, T, and cruciform shapes are limited due to the cost and time required to test specimens with slab thicknesses and column sizes commonly used in practice. In this paper, the punching shear behaviour of five interior L-shaped slab-column connections, one without a slab opening and four with slab openings, subjected to static concentric loading are analyzed using a plasticity-based nonlinear finite element model (FEM) in ABAQUS. The FEM is similar to models previously calibrated at the University of Waterloo and are calibrated considering nine slabs that are tested to study the impact of column rectangularity on the punching shear behaviour of reinforced concrete slabs. The finite element analysis results indicate that shear stresses primarily concentrate around the ends of the L, and that current code predictions from ACI 318-19 and Eurocode 2 may be unconservative due to the assumed critical perimeters around L-shaped columns.

Słowa kluczowe

EN

punching shear; finite element analysis; L-shaped columns; slab openings

• Wydawca: Wydawnictwo Politechniki Lubelskiej
• Czasopismo: Budownictwo i Architektura
• Rocznik: 2020
• Tom: Vol. 19, no 4
• Strony: 125--138
• Opis fizyczny: Bibliogr. 14 poz., fig., tab.

Twórcy

autor

Zhang Qing

• Department of Civil and Environmental Engineering (CEE); University of Waterloo; 200 University Avenue West, Waterloo, Ontario; Kanada

autor

Milligan Graeme J.

• Department of Civil and Environmental Engineering (CEE); University of Waterloo; 200 University Avenue West, Waterloo, Ontario; Kanada

autor

Polak Maria Anna

• Department of Civil and Environmental Engineering (CEE); University of Waterloo; 200 University Avenue West, Waterloo, Ontario; Kanada

Bibliografia

• 1. FIB, "Punching of structural concrete slabs", fib Bulletin 12, 2001.
• 2. Ospina C. E., Birkle G., Widianto Y. W. et al., "NEES: ACI 445 Punching Shear Collected Databank", 2015.
• 3. Wang Z.-j., Liu W.-q., Wang J., Jing Y.-s. and Xu C., "Shaking table test for a mid-highrise big-bay RC frame model", Earthquake Engineering and Engineering Vibration, vol. 19, no. 3, 1999, pp. 59-64 (in Chinese).
• 4. Liu W. and Huang C., "Experimental investigation on punching shear behaviour of concrete slab-nonrectangular column connections", Journal of Building Structures, vol. 25, no. 4, 2004, pp. 26-33, (in Chinese).
• 5. ACI Committee 318, Building Code Requirements for Structural Concrete (ACI 318-19) and Commentary on Building Code Requirements for Structural Concrete (ACI 318R-19), Farmington Hills, MI: American Concrete Institute, 2019.
• 6. European Committee For Standardization, Eurocode 2: Design of concrete structures - Part 1-1: General Rules and Rules for Buildings, Brussels, Belgium, 2004.
• 7. Genikomsou A. S., Milligan G. J. and Polak M. A., "Modeling Parameters in Punching Shear Finite Element Analysis of Concrete Slabs", ACI Special Publication, vol. 328, 2018, pp. 12.1-12.24.
• 8. Hawkins N. M., Fallsen H. B. and Hinojosa R. C., "Influence of Column Rectangularity on the Behavior of Flat Plate Structures", ACI Special Publication, vol. 30, 1971, pp. 127-146.
• 9. ASCE-ACI Committee 426, "The shear strength of reinforced concrete members – slabs", Journal of the Structural Divison, vol. 100, no. 8, 1974, pp. 1543-1591.
• 10. Milligan G. J. and Polak M. A., "Finite Element Investigation on the Effect of Column Rectangularity on Punching Shear Strength of Concrete Slabs, The International Federation for Structural Concrete", in fib Congress, Melbourne, 2018, p. 12.
• 11. Milligan G. J. and Polak M. A., "Finite Element Analysis of Shear Behaviour of Concrete Slabs Partially Supported on Walls", in Concrete innovations in materials, design and structures: proceedings of the 2019 fib symposium, held in Krakow, Poland, May 27–29, 2019, Kraków, 2019, pp. 1803-1810.
• 12. Petersson E., Crack Growth and Development of Fracture Zones in Plain Concrete and Similar Materials. Division of Building Materials, LTH, Lund, Sweden, 1981.
• 13. Dassault Systemes Simulia Corp., ABAQUS Analysis User's Manual 6.12-3, Providence, RI, USA, 2012.
• 14. Genikomsou A. S. and Polak M. A., "Finite element analysis of punching shear of concrete slabs using damaged plasticity model in ABAQUS", Engineering Structures, vol. 98, 2015, pp. 38-48. https://doi.org/10.1016/j.engstruct.2015.04.016

Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).