Prediction of material damping in timber floors, and subsequent evaluation of structural damping

摘要

Dynamic properties of two timber floor specimens are experimentally evaluated by the impact method. Each specimen uses one specified type of connectors, either screws or nails. A numerical model is developed using constrained degrees-of-freedom for the modeling of connectors. Numerical analyses have been performed, and show good agreement with experimental results. A procedure is written using the finite element software Abaqus to predict material damping from a strain energy approach. Estimation of structural damping is performed as the difference between the experimentally evaluated total damping and the predicted material damping. The contribution from floor members to material damping is extensively investigated.