Computational & Technology Resources
an online resource for computational,
engineering & technology publications
Civil-Comp Proceedings
ISSN 1759-3433
CCP: 108
PROCEEDINGS OF THE FIFTEENTH INTERNATIONAL CONFERENCE ON CIVIL, STRUCTURAL AND ENVIRONMENTAL ENGINEERING COMPUTING
Edited by: J. Kruis, Y. Tsompanakis and B.H.V. Topping
Paper 259

The Effect of Weak Shear Webs on the Deformations of Timber Box Type Beams

S.R. Atashipour1, U.A. Girhammar1 and N. Challamel2

1Division of Structural and Construction Engineering-Timber Structures, Department of Civil, Environmental and Natural Resources Engineering, Luleå University of Technology, Sweden
2LIMATB, Université Européenne de Bretagne, University of South Brittany, Lorient, France

Full Bibliographic Reference for this paper
S.R. Atashipour, U.A. Girhammar, N. Challamel, "The Effect of Weak Shear Webs on the Deformations of Timber Box Type Beams", in J. Kruis, Y. Tsompanakis, B.H.V. Topping, (Editors), "Proceedings of the Fifteenth International Conference on Civil, Structural and Environmental Engineering Computing", Civil-Comp Press, Stirlingshire, UK, Paper 259, 2015. doi:10.4203/ccp.108.259
Keywords: partial composite interaction, shear slip, deflection, stabilising wall element, ANSYS.

Summary
This paper deals with deflection analysis of a deep composite box beam due to in-plane shear deformations, especially the modelling of the shear deformations in the webs is considered. The beam is composed of three framing members with sheathings on both sides. The sheathings or webs between the framing members are modelled as shear media with equivalent slip moduli corresponding to the partially composite beam model with three separated layers and two interlayer slip areas. The minimum total potential energy principle is employed to obtain the governing equilibrium equations and corresponding boundary conditions. The coupled set of governing equations is recast into an uncoupled form and solved explicitly together with the corresponding boundary conditions. The closed-form solutions obtained are compared to those based on the conventional beam theories. It is shown that the model is capable of predicting accurately the deflections for a wide range of geometry and property parameters, especially for small shear stiffness (slip modulus) values for the webs. The formula for the deflection is reduced to the Timoshenko formula for full composite interaction when the shear slip modulus of the web approaches infinity. Comparative numerical results are presented to show the influence of bending deformations, shear deformations in the framing layers and the in-plane shear deformations in the sheathings.

purchase the full-text of this paper (price £20)

go to the previous paper
go to the next paper
return to the table of contents
return to the book description
purchase this book (price £75 +P&P)