光圆螺杆加强胶合木梁柱螺栓节点抗侧性能

Lateral Resistance Capacity of Glulam Beam-tocolumn Bolted Connections Reinforced by Plain Round Rod

采用光圆螺杆对节点进行横纹加强,并通过进行胶合木螺栓连接梁柱节点在有、无光圆螺杆加强时的单调和低周往复加载试验,研究了节点的刚度、延性、承载力、破坏模式和抗震性能.结果表明:普通节点裂缝出现较早且发展迅速,主要破坏模式为劈裂破坏;采用光圆螺杆加强后,节点的主要破坏模式为销槽承压破坏和螺栓弯曲破坏,并且节点的承载力、延性和抗震性能得到了明显提高.

In order to avoid the brittle failure of glulam bolted connections,a reinforcing method,which used plain round rod as reinforcement perpendicular to grain,was proposed.Through monotonic and low frequency cyclic loading tests of reinforced and non-reinforced glulam beam-to-column bolted connections,the stiffness, ductility, moment resistance capacity, failure modes and seismic behaviors of the connections were studied.The results show that the cracks of non-reinforced bolted connections appear early with rapid development and the main failure mode of non-reinforced connections is splitting,while the main failure modes of reinforced connections are wood crushing and blots bending.Besides,the moment resistance capacity,ductility and seismic performance of the connections reinforced with plain round rod are enhanced significantly.