Miloš Milić, Predrag Petronijević, Todor Vacev, Andrija Zorić, Ivan Nešović

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During rehabilitation of residential buildings built in the first half of the 20th century, it is necessary to strengthen timber floors so they can fulfill the requirements of strength and serviceability according to contemporary regulations. Floors made of monolithic timber girders can be most easily strengthened by forming a composite structure with a reinforced concrete slab supported on a trapezoidal steel sheeting, with appropriate connections between different materials. In the paper, the procedure of calculation of nails used as shear connectors for composite action of timber and concrete is presented. The procedure is based on equations given in Eurocode 5, and besides that, a calculation applying FEM has been conducted, and a comparison of results is presented.


composite action timber-concrete, nail, rope effect, Eurocode 5, FEM

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H. J. Blass, A. Bienhaus, V. Krämer: Effective bending capacity of dowel-type fasteners, Proceedings PRO, pp. 71-80, 2001.

EN 1992-1-1: Eurocode 2: Design of concrete structures: Part 1-1: General rules and rules for buildings, 2004.

EN 1995-1-1: Eurocode 5: Design of timber structures: Part 1-1: General - Common rules and rules for buildings, 2004.

EN 26891:1991 - Timber structures. Joints made with mechanical fasteners. General principles for the determination of strength and deformation characteristics, 1991.

EN 338: Structural timber - Strength classes, 2009.

EN 383: Timber Structures - Test methods - Determination of embedment strength and foundation values for dowel type fasteners, 2007.

A. Hassanieh, H. R. Valipour, M. A. Bradford: Experimental and analytical behaviour of steel-timber composite connections, Construction and Building Materials, vol. 118, pp. 63-75, 2016.

A. Hassanieh, H. R. Valipour, M. A. Bradford: Load-slip behaviour of steel-cross laminated timber (CLT) composite connections, Journal of Constructional Steel Research, vol. 122, pp. 110-121, 2016.

K. W. Johansen: Theory of Timber Connections, Int Assoc Bridge Struct Eng, vol. 9, pp. 249-262, 1949.

N. Khorsandnia, H. R. Valipour, C. Keith: Experimental and analytical investigation of short-term behaviour of LVL-concrete composite connections and beams, Construction and Building Materials, vol. 37, pp. 229-238, 2012.

Lj. Kozarić: Vibracije izazvane ljudskim delovanjem kod spregnutih međuspratnih konstrukcija tipa drvo-laki beton, doktorska disertacija, Subotica, Građevinski fakultet, 2016.

E. Maslak, D. Stojić, D. Drenić, E. Mešić, R. Cvetković: Strengthening timber-concrete composite girders with prestressed reinforcement, Građevinar, vol. 72, pp. 1001-1010, 2020.

M. Milić, P. Petronijević, T. Vacev, I. Nešović, A. Zorić: Rehabilitation of a Wooden Floor Structure by Composite Joint with RC Slab, Contemporary Achievement in Civil Enginnering, Subotica, Građevinski fakultet, pp. 203-209, 2021.

S. Nakashima, A. Kitamori, T. Mori, K. Komatsu: Propose Alternative Design Criteria for Dowel Type Joint with CLT, RILEM International Symposium on Materials and Joints in Timber Structures, Stuttgart, Germany, 739-748, 2013.

B. Stevanović: Eksperimentalna i teorijska analiza spregnutih nosača drvo-beton izvedenih mehaničkim spojnim sredstvima, Materijali i konstrukcije, pp. 29-46, 2004.

D. Stojić, R. Cvetković: Analysis of a composite timber-concrete structures according to the limit states: Design and innovative methods in coupling of a timber and concrete, Facta universitatis - series: Architecture and Civil Engineering, pp. 169-184, 2001.


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