内嵌多块钢板销式木连接力学性能研究

Mechanical Behviour of Dowel-type Timber Connections with Multiple Slotted-in Steel Plates

摘要:

内嵌钢板销式连接是重型木结构中最有效的连接方式之一，已在重型木结构节点连接中得到广泛应用。为了更好地掌握此类连接的力学性能，本文对11个内嵌钢板单销连接顺纹受压木结构节点进行了试验研究，主要研究内嵌钢板销式连接的力学性能和破坏模式以及钢板数目ns、钢板间距t2和钢销直径d对承载力的影响。试验结果表明，在钢销直径相同的条件下，连接节点的承载力随钢板数目ns和钢板间距t2与边缘木材厚度t1比值的增加而增大。最后基于欧洲屈服理论并根据叠加原理推导了内嵌多块钢板销式连接节点承载力计算公式，理论计算结果与试验数据吻合较好。

Abstract:

The dowel-type connection with slotted-in 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 this type of connection well, 11 specimens with different number and spacing of steel plates and different dowel diameters were tested. The mechanical properties and failure modes of the connections were investigated. And influence of the parameters such as the number of steel plates, the spacing of steel plates and the dowel diameter were also studied based on the test results. The results show that the bearing capacity of connections with the same dowel diameter increased as the number and spacing of steel plates increased. The estimating formulas for the load-carrying capacity of connections were developed based on the European yield theory and the principle of superposition. The theoretical results show good agreement with the test results