螺栓排数和自攻螺钉对木梁柱节点抗侧力性能的影响

Effect of Bolt Row and Self-tapping Screw Reinforcement on Lateral Performance of Bolted Timber Connection

通过4组梁柱节点在单调和往复加载下的抗侧力试验,得到了各组节点的破坏模式、弯矩-转角曲线、滞回曲线、强度、刚度、延性及耗能性能,研究了不同螺栓排数和自攻螺钉加强对节点抗侧力性能的影响.结果表明,普通节点中裂缝出现早,开展迅速;增加螺栓排数可提高节点的强度和延性,其中强度提高更明显;自攻螺钉加强可明显减轻和延缓木材的开裂,提升节点的延性和抗震性能.

Four groups of experimental tests were conducted with T-shaped beam-to-column connections under monotonic and reversed cyclic loading. The failure modes, momentrotation curves, moment capacity, ductility and energy dissipation properties were obtained, and the effect of bolt row and self-tapping screw reinforcement on the lateral performance of the connection were studied. The results show that the cracks on traditional bolted connections occur early with rapid development. The strength and ductility, especially the strength, increases with the increase of bolt row. The self-tapping screw reduces and delays wood splitting, which enhances the ductility and seismic performance of the connections.