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Issue 9, Volume 2, September 2007
Print ISSN: 1991-8747
E-ISSN: 2224-3429







Title of the Paper: Slip Modeling in Timber-Framed Walls with Wood-Based or Fibre-Plaster Sheathing Boards


Authors: M. Premrov, P. Dobrila, B.S. Bedenik, I. Špacapan

Abstract: The paper provides mathematical modelling for prefabricated timber-framed walls composed of a timber frame and two different types of sheathing boards. Since by wood-based boards (WBB) the tensile strength is similar to the compressive one, there are practically no cracks appearing in the boards. On the other hand, in case of fibre-plaster sheathing boards (FPB) the tensile strength is approximately 10-times lower than the compressive one and therefore cracks in the tensile diagonal board’s direction usually appear. Based on analysis of experimental research results [1] special approximate mathematical models have been developed. The models enable simultaneously to consider the flexibility of mechanical fasteners in the connecting areas, as well as possible cracks appearing in the tensile area of the sheathing boards.

Keywords: Timber structures, Walls, Slip, CFRP, Modelling

Title of the Paper: Analysis of composite T beam composed of timber, concrete and carbon strip


Authors: Matjaž Tajnik, Peter Dobrila, Miroslav Premrov

Abstract: This paper provides a mathematical model and numerical example of composite T-section composed of a concrete plate and a timber beam strengthened at the bottom tension side with a carbon fibre-reinforced polymer (CFRP) strip. Analysis is provided in accordance with the European standards for timber, steel and concrete structures. The tensile strength of the carbon strip as well as the compressive strength of the concrete plate are higher than the bending strength of the timber beam, therefore it is convenient to use such composition of material to gain a higher load bearing capacity. It has been shown that the inclusion of CFRP strip reinforcement on the increase of load carrying and bending stiffness capacity was not as high as expected. On the other hand, we realized the importance of variety of material grade and geometrical properties combinations between sub-components which can significantly improve load bearing capacity and stiffness of composed beam. Furthermore, the CFRP strip contribution to the bending resistance and stiffness of the element is presented as a function of the fastener spacing intervals between concrete plate and timber beam.

Keywords: Composite structures, Timber structures, Carbon strip, Load bearing capacity, Modelling,

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