胶合木与胶合木螺栓连接力学性能试验研究  

Experimental study of bolted glued timber-to-timber joints

作　　者：徐德良[1] 刘伟庆[1] 周叮[1] 奚爱峰[1] 

机构地区：[1]南京工业大学土木工程学院,江苏南京210009

出　　处：《建筑结构学报》2011年第7期93-100,共8页Journal of Building Structures

基　　金：国家自然科学基金项目(50578075);国家科技支撑计划子课题-木建筑住宅关键技术研究项目(2006BAJ04A02-10);江苏省建设厅招标项目(JS2005ZB05)

摘　　要：试验研究胶合木与胶合木单螺栓连接及群螺栓连接构件在顺纹受拉时的承载能力,分析其破坏模式和破坏机理,试验对象为3组9个单螺栓连接和4组20个群螺栓连接。研究表明:胶合木与胶合木单螺栓连接的力学性能与胶合木的厚度比有关,当侧材厚度比为4.375时,破坏形态Ⅲ型,延性最佳;胶合木与胶合木群螺栓连接的力学性能与螺栓列数及每列的螺栓数有关,群螺栓连接承载力应考虑螺栓的有效个数。两列布置群螺栓,破坏形态螺栓受力较均匀的两列开裂,其延性与一列与三列相比最佳。Three groups of 9 single-bolted connections and four groups of 20 multi-bolted connections were tested to investigate their mechanical performance.The bearing capacity of single-bolted and multi-bolted glued timber-to-timber connections subjected to a load parallel to grain was studied.The failure modes and failure mechanism of bolted connections were discussed in detail.For the single-bolted glued timber-to-timber connections,it is shown that the failure modes,bearing capacity,stiffness and ductility are related to the thickness ratio of the side members of the structure.When the thickness ratio of the side member is equal to 4.375,the failure modes is type Ⅲ.In such a case,the ductility is the best.For multi-bolted timber-to-timber connections,it shows that the failure modes,bearing capacity,stiffness and ductility are relevant to the bolt number in a row and the row number of bolts.The bearing capacity of the joint is relevant to the effective number of bolts rather than the total number of bolts.In all of the multi-row arrangements,the two-row cracks failure mode where the bolts are uniformly loaded exhibits the highest ductility.

关 键 词：胶合木结构 胶合木-胶合木单螺栓连接 胶合木-胶合木群螺栓连接 静力试验 破坏形态 承载能力 

分 类 号：TU366.2[建筑科学—结构工程] TU317.1