Parametric analysis of large diameter mechanical fastener in reinforced glulam

Research deals with a 49 mm in diameter mechanical fastener in reinforced laminated timber, to which a load perpendicular to grain is applied. Influence of glass fibre textile to reinforcing connection zone on the joint mechanical properties was carried out. The experimental tests were divided in two stages: first stage was carried out on locally reinforced and second on non-reinforced timber specimens. Finite element models were made in software package Abaqus/CEA ver. 6.10. UMAT subroutine and surface-based cohesive behaviour were used for modelling complex timber behaviour. Results obtained by finite element model and experimental tests were shown and compared for non-reinforced and reinforced specimens with 900 g/m2 of textile in connection zone. Also, parametric finite element model analyses were carried out for reinforced specimens with textile quantity between 0 ÷ 900 g/m2 in the connection zone. Research results have shown that the application of textile in connection zone increases maximum force and yield force even in the smallest quantity.