Reversed-Cyclic Behavior of a Novel Heavy Timber Tube Connection

Abstract

The provision of ductile connections is a critical element that is often lacking in the design of a heavy timber structure to resist seismic loads. During the last decade, a novel connection was developed that combined reliable high strength and stiffness with excellent ductile properties, the so-called tube connection. The steel tubes fit into oversized holes that ease the assembly of the connection members. By expanding the diameter of the steel tube, a perfectly tight fit can be realized. To prevent timber splitting when the tube diameter is increased, densified veneer (ply)wood is glued on the timber members as reinforcement. This paper reports the results of an experimental study to determine the hysteresis behavior of the tube connection. Unprecedented energy dissipation capabilities were found in comparison with other timber connections. Applied in timber frame structures, its seismic performance will be enhanced considerably and a more competitive structural timber design is within reach.