Numerical Investigation on the Material Behavior of Hardwood Glulam Beam-Columns Subjected to Combined Bending and Axial Compression

This paper presents a numerical investigation of hardwood Glulam beam-columns subjected to combined bending and axial compression. The paper compares the load-bearing capacities resulting from a bilinear elastic-plastic material behavior and a non-linear elastic-plastic material behavior with softening using beech GL 48h. The numerical investigations were performed using SOFiSTiK FEA 2024, based on a 4-point bending test setup. The results show that both material behaviors have similar load-bearing capacities for low axial forces. However, the non-linear material behavior at higher axial loads predicts lower bending capacities up to 35 % due to softening effects. While the bilinear material behavior is suitable for determining the loadbearing capacity under Nx-My-interaction more easily, the non-linear material behavior allows the full consideration of plasticization effects. For a more accurate beam-column modeling, stress-strain relationships should be derived from combined bending-compression tests rather than pure bending or compression tests.     «

This paper presents a numerical investigation of hardwood Glulam beam-columns subjected to combined bending and axial compression. The paper compares the load-bearing capacities resulting from a bilinear elastic-plastic material behavior and a non-linear elastic-plastic material behavior with softening using beech GL 48h. The numerical investigations were performed using SOFiSTiK FEA 2024, based on a 4-point bending test setup. The results show that both material behaviors have similar load-bear...     »