Hysteretic behavior of a cross-laminated timber building incorporating different energy dissipators

Abstract

Large-scale experiments on timber structures, incorporating damping devices, showed high-intensity earthquakes can be resisted. This paper compares cyclic response of a two-story cross-laminated timber (CLT) building with three different dampers: resilient slip friction joint (RSFJ), lead extrusion damper (LED), and linear friction damper (LFD). A CLT building with conventional hold-downs and angle brackets experimental work was used as a benchmark to validate the high-fidelity finite element model. Subsequently, the numerical model was extended to account for the three dampers. Re-centering efficiency, i.e., expected flag-shaped hysteretic response, of the RSFJ was ensured by increasing the shear strength of hold-downs. Buildings with LFD and LED have greater energy dissipation capacity when compared to buildings with conventional hold-downs. Improved energy dissipations were also observed in two buildings when increasing the shear strength of angle bracket or applying the rigid connections in the 2nd story. Finally, the performances of buildings with different dampers were evaluated.