胶合木结构单螺栓顺纹连接延性性能试验研究

Experimental Study on the Ductile Performance of Loads Parallel to Grain in Single-bolted Connections of Glued-laminated Timber

为了解延性螺栓连接的性能,对8组24个不同螺栓直径和木材厚度的单螺栓顺纹连接试件进行了试验研究,探讨了不同木材厚度与螺栓直径对破坏模式的影响,分析了不同破坏模式下各组别荷载位移关系、承载力、刚度及延性的变化。试验结果表明：在螺栓长细比10~12.9的范围内,增加内嵌钢板单螺栓顺纹节点螺栓的长细比有助于提高节点的延性。

Eight groups of single-bolted connections parallel to the grain with different bolt diameters and timber thicknesses （ in total 24 specimens） were tested by monotonic loading. The tests show effects of different bolt diameters and timber thicknesses on failure modes of connections. Load-slip curves and change rules of specimens bearing capacity, stiffness and ductility in different failure modes were also obtained in this test. The test results indicate that appropriately increasing the slenderness ratio of single-bolted connections parallel to the grain will enhance the ductility of connections.