燕尾榫连接胶合木梁抗弯性能研究

The Performance Study on Bending Failure of Dovetail Joint Connected Glulam Beam

近年来,随着木结构产业的发展,胶合木结构得到了广泛应用,然而胶合木节点连接处易发生脆性破坏。为增大节点发生延性破坏的概率,提高连接节点的承载能力,尝试开发一种燕尾榫连接胶合木梁节点。通过有限元分析软件Abaqus建立相应的有限元模型,分析燕尾榫连接胶合木梁的受力状态与破坏模式,并对比各种工况关键节点的应力变化、荷载-位移曲线,研究燕尾榫连接胶合木梁的抗弯性能。结果表明:随着榫头长度的增加,燕尾榫连接胶合木梁的连接性能逐步变好,其抗弯能力也逐渐增强。

Recently years,heavy timber frame constructions have been widely used with the development of wood structure industry,whereas the joint is prone to brittle failure leading to break of the glulam beams.In order to increase the probability of ductile failure and the bearing capacity of the joints,in this paper,a dovetail joint connected glulam beam joint was attempted to develop,and the stress state and failure mode of the dovetail joint connected glulam beams with the finite element analysis software Abaqus were analyzed.The variation of stress rates and load-displacement curves at critical points in various working conditions,were compared to elucidate the bending mechanical properties of the dovetail joint connected glulam beams.The results showed that with the increase of tenon length,the connection performance of the dovetail joint connected glulam beam gradually were better connected,and the bending resistance was enhanced.