Seismic resilience of plywood-coupled LVL wall panels

摘要

Structural wall panels Laminated veneer lumber (LVL) have been proposed for enhanced seismic resistance of multi-storey timber buildings based on research performed at University of Canterbury, New Zealand. The system is designed to be self-centering with unbonded post-tensioning and dissipate energy through ductile connections. This paper describes the experimental and numerical investigation of one such arrangement with post-tensioned LVL wall panels coupled with plywood sheets. It is observed that energy is dissipated mostly through yielding of the nails used to attach plywood sheets to the wall panels, and whole assembly return close to their initial position while remaining virtually undamaged. The same specimen has been tested under repeated series of cyclic loading to investigate the performance of the arrangement under more than one seismic event (e.g. a major earthquake followed by a significant aftershock). Different nail spacing and arrangements have been tested to compare their energy dissipation characteristics.