Prediction of Punching Shear Failure Behaviour of Slab-Edge Column Connections with Varying Opening and Column Parameters

Abstract

A numerical analysis using the non-linear Layered Finite Element Method (LFEM) is undertaken to predict the effect of openings on punching shear failure behaviour of slab-column connections with shear stud reinforcement (SSR). In all, twenty one (21) models are examined through six parametric studies including varying the opening size and location and varying the column aspect ratio. The numerical results covering the load-deflection response, ultimate shear strength, deformation and crack pattern are evaluated in some detail. Where applicable the predicted ultimate shear strengths are compared to the experimental results. Also included in the comparison are the empirical predictions recommended by the Standards Association of Australia and the American Concrete Institute. This investigation is an important step towards the determination of the size and location of opening and the size of column for optimum structural performance of flat plate systems.

Keywords

flat slab-column connections openings failure analysis parametric study

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References

ACI 318. (2005). Building Code Requirements for Reinforced Concrete (ACI 318–05) and Commentary – ACI318R-05, American Concrete Institute (ACI), Detroit, Michigan.

AS 3600. (2001). Concrete Structures, Standards Association of Australia, Sydney, Australia.

El-Salakawy

E.F.

Polak

M.A.

and Soliman

M.H.

(2000). “Reinforced concrete slab-column edge connections with shear studs”, Canadian Journal of Civil Engineering, Vol. 27, No. 2, pp. 338–348.

Gomes

R.B.

and Silva

J.A.

(2003). “Punching shear resistance of reinforced concrete flat slab with openings and rectangular columns”, Proceedings of the 9^th East Asia-Pacific Conference on Structural Engineering and Construction, Institut Teknologi Bandung, Bali, Indonesia, December, pp. 231–236.

Guan

and Loo

Y.C.

(1997). “Flexural and shear failure analysis of reinforced concrete slabs and flat plates”, Advances in Structural Engineering, Vol. 1, No. 1, pp. 71–85.

Guan

and Loo

Y.C.

(2003). “Failure analysis of column–slab connections with stud shear reinforcement”, Canadian Journal of Civil Engineering, Vol. 30, No. 5, pp. 934–944.

Guan

and Polak

M.A.

(2007). “Finite element studies of RC slab-edge column connections with openings”, Canadian Journal of Civil Engineering, Vol. 34, No. 8, pp. 952–965.

Hinton

, and Owen

D.R.J.

(1984). Finite Element Software for Plates and Shells, Pineridge Press Limited, Swansea, UK.

Hognestad

Elstner

R.C.

and Hanson

J.A.

(1964). “Shear strength of reinforced structural lightweight aggregate concrete slabs”, ACI Structural Journal, Vol. 61, No. 6, pp. 643–656.

10.

Irawan

Liew

J.T.

Kong

K.L.

and Teng

(2003). “Punching shear strength of slab-column connections with opening and strengthened with shear stud reinforcement”, Proceedings of the 9^th East Asia-Pacific Conference on Structural Engineering and Construction, Institut Teknologi Bandung, Bali, Indonesia, December, pp. 97–102.

11.

Loo

Y.C.

, and Guan

(1997). “Cracking and punching shear failure analysis of RC flat plates.” Journal of Structural Engineering, ASCE, Vol. 123, No. 10, pp. 1321–1330.

12.

Moe

(1961). “Shearing strength of reinforced concrete slabs and footings under concentrated loads”, Development Department Bulletin D47, Portland Cement Association, Skokie, pp. 1–130.

13.

Mowrer

R.D.

and Vanderbilt

M.D.

(1967). “Shear strength of lightweight aggregate reinforced concrete flat plates”, ACI Structural Journal, Vol. 64, No. 11, pp. 722–729.

14.

Ožbolt

and Vocke

(2001). “Three dimensional numerical analysis of punching failure”, fib Bulletin 12, Punching of Structural Concrete Slabs, pp. 71–78.

15.

Polak

M.A.

(1998a). “Shear analysis of reinforced concrete shells using degenerate elements”, Computers & Structures, Vol. 68, No. 1–3, pp. 17–29.

16.

Polak

M.A.

(1998b). “Modelling punching shear of RC slabs using layered finite elements”, ACI Structural Journal, Vol. 95, No. 1, pp. 71–80.

17.

Polak

M.A.

(2005). “Shell finite element analysis of reinforced concrete plates supported on columns”, Engineering Computation: International Journal of Computer Aided Engineering and Software, Vol. 22, No. 4, pp. 409–428.

18.

Roll

Zaidi

S.T.H.

Sabnis

and Chuang

(1971). “Shear resistance of perforated reinforced concrete slabs”, ACI Publication, SP-30, pp. 77–101.

19.

Staller

(2001). “Numerical analysis with the finite element program MARC”, fib Bulletin 12, Punching of Structural Concrete Slabs, pp. 103–109.