Keywords: bond-slip, composite beams, shear connectors, beam element, non-linear analysis.

This paper deals with the introduction of a non-linear finite element analysis method which can simulate the bond-slip behavior of a partially composite beam based on Timoshenko beam theory and typical beam element with two nodes at both ends [1]. In the proposed bond-slip model, the governing equation of the composite beams is derived based on a linear partial interaction theory and is solved by applying boundary conditions at the two ends of the beam with compatibility conditions.

It is possible to perform structural analyses that are more efficient by means of implementing this bond-slip model in the finite element analysis procedures, as the results of a general structural analysis are necessary to perform the bond-slip analysis. Moreover, the proposed model can consider various structures subjected to arbitrary lateral loading that were difficult to analyze with the many previously proposed models [2,3,4,5]. Also, complicated modeling processes such as the insertion of double nodes [6] are simplified through the use of typical beam elements which have two degree of freedom for a node.

Initially, for the verification of the integrated analysis system, numerical results using the integrated analysis system for steel-concrete composite beams are compared with the analytical results of the existing study [7]. The main characteristics of the bond-slip behavior are shown to be suitably reflected in the results. Secondly, numerical results by the proposed finite element bond-slip model are compared with the experimental results for the various concrete composite beams [8] with different material properties and sizes. These structural analysis results, considering the bond-slip effect, show good consistency with the experimental data. Through these comparisons, the validity of the integrated analysis system is established.

1

D.R.J. Owen, E. Hinton, "Finite elements in plasticity: theory and practice", Pineridge Press, Swansea, 1980.

2

M.A. Bradford, R.I. Gilbert, "Composite beams with partial interaction under service loads", Journal of Structural Engineering, 118(7), 1871-1883, 1992. doi:10.1061/(ASCE)0733-9445(1992)118:7(1871)

3

L. Dezi, C. Ianni, A.M. Tarantino, "Simplified creep analysis of composite beams with flexible connectors", Journal of Structural Engineering, 119(5), 1484-1497, 1993. doi:10.1061/(ASCE)0733-9445(1993)119:5(1484)

4

N.A. Jasim, A. Atalla, "Deflections of partially composite continuous beams: A simple approach", Journal of Constructional Steel Research, 49(3), 291-301, 1999. doi:10.1016/S0143-974X(98)00001-7

5

N.A. Jasim, "Deflections of partially composite beams with linear connector density", Journal of Constructional Steel Research, 49(3), 241-254, 1999. doi:10.1016/S0143-974X(98)00206-5

6

N. Gattesco, "Analytical modeling of non-linear behavior of composite beams with deformable connection", Journal of Constructional Steel Research, 52(2), 195-218, 1999. doi:10.1016/S0143-974X(99)00026-7

7

H.G. Kwak, Y.J. Seo, "Behaviour of Steel-Concrete Composite Beam with Flexible Shear Stud", in B.H.V. Topping, (Editor), "Proceedings of the Eighth International Conference on Civil and Structural Engineering Computing", Civil-Comp Press, Stirlingshire, UK, Paper 18, 2001. doi:10.4203/ccp.73.18

8

K.H. Tan, L.W. Guan, X. Lu, T.Y. Lim, "Horizontal shear strength of indirectly loaded composite concrete beams", ACI Structural Journal, 96(4), 533-539, 1999.

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