Design of nailed timber-concrete composite joint according to Eurocode and FEA

Abstract

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.

Experimental Research and FE Model of a Bolted Steel-CLT Composite Connection

“…Orthotropic behavior of the material is achieved by element setting in the lattice structure, which may be hexagonal [9] or quadric [10]. One of the 2D discrete models is applied for analysis of the dowel-type timber connections, and in which the influence of the timber is replaced by 2-node ROD elements [11]. However, if very precise results are needed, such models require very dense FE mesh, resulting with high number of FE and long duration of analysis.…”