Rotational Performance of PreStressed MultiBolted Glulam Connection with Square Tubes

Abstract:

This paper presents an experimental study on the moment resisting capacity and stiffness of the proposed prestressed bolted connection. Highstrength bolts with square tubes were used as fasteners in such connections. Two groups of experimental tests were conducted with Tshaped glulam beamtocolumn connections at monotonic and reversed cyclic loading. The failure mode, momentrotation curve, strength, stiffness and energy dissipation property of the prestressed bolted connections with square tubes were obtained and compared with those of traditional bolted connections. The results show that the initial rotational stiffness of prestressed bolted connection increases significantly as a result of the friction between steel tubes and steel plate at the friction stage, and the energy dissipation capacity of prestressed bolted connection is also improved.

Key words:glulam structure; multibolted connection with square tubes; prestress; fraction; rotational stiffness