预应力方套管连接胶合木梁柱节点抗弯试验

提出在胶合木结构中采用预应力方套管螺栓连接,该连接采用高强螺栓和钢套管作为连接件.通过单调加载和往复加载下的梁柱节点抗弯试验,对比了方套管节点和传统螺栓群连接节点的破坏模式、弯矩-转角曲线、滞回曲线、强度、刚度和耗能性能.结果表明,由于摩擦阶段钢管与钢板间的摩擦力确保了初始传力,套管节点的初始转动刚度显著提升,耗能能力也得到改善.

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

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.