Multiple tenons - Numerical studies on local reinforcement and geometrical optimisation

Based on experimental investigations of multiple tenon joints, a finite element model with cohesive elements was developed to consider non-linear component behaviour in a otherwise linear-elastic material model. The model was created to vary a large number of geometrical influences on the load capacity of the wood-to-wood joint. Thus, complex experimental investigations were replaced by numerical determination. The comparable maximum shear force at the connection was used to assess different multiple tenon configurations. Optimal tenon ratio (tenon length to tenon height) was determined to 1.0. The investigation has shown that a form-fitting structure leads to higher load capacities when a gap between the connection partners is considered. Additional reinforcements of the wooden joint were developed and used to predict following experimental results.