内嵌钢板销式连接胶合木梁短期受力性能

Behavior of the Glulam Timber beams with Slotted-in Steel Plates Dowel-type Connections

摘要:

内嵌多块钢板销式连接是重型木结构最有效的连接方式之一，已越来越广泛地被应用于木结构节点连接中。为了更好地掌握采用此类连接构件的力学性能，对2根内嵌三块钢板销式连接胶合木梁短期受力性能进行了试验研究，其中1根梁的连接节点位于纯弯段，另1根梁的连接节点位于弯剪段。主要研究采用此类连接胶合木梁的力学性能、破坏模式、连接位置对力学性能的影响等，并基于试验结果推导采用此类连接的胶合木梁的极限承载力和挠度计算公式。试验结果表明：构件的极限承载力和跨中挠度与连接节点的位置有关，连接节点位于弯剪段胶合木梁的承载力大于连接节点位于纯弯段胶合木梁的承载力；理论计算结果与试验数据吻合，可为木结构的设计和应用提供参考。

Abstract:

The dowel-type connection with slotted-in multiple steel plates widely used in modern timber constructions is one of the most efficient connections for heavy timber structures. To understand the mechanical properties of the components with this type of connections well, two glulam timber beams connected with three slotted-in steel plates dowel connections were tested, one beam with connection on the pure bending zone and the other beam with connection on bending and shearing zone. The mechanical properties, failure modes and the effect of the connection location on the mechanical properties of the beams were studied. And the estimating formulas of ultimate load-carrying capacity and mid-span deflection were presented based on the test results. The tests show that the load-carrying capacity of the glulam beam with connection on the bending and shearing zone is greater than that of the beam with connection on the pure bending zone. The estimating results agree well with the test results.