木结构钢填板预应力套管螺栓连接性能试验  

Loading Tests of Prestressed Tube Bolted Joint with Slotted-in Steel Plate

作　　者：何敏娟[1] 倪淑娜[1] 马人乐[1] 白雪[1] 

机构地区：[1]同济大学土木工程学院,上海200092

出　　处：《同济大学学报（自然科学版）》2013年第9期1353-1358,共6页Journal of Tongji University:Natural Science

基　　金：国际科技合作计划(2008DFA71990)

摘　　要：针对木结构螺栓连接初始刚度低的问题,提出了一种新的连接形式——钢填板预应力套管螺栓连接.在这种连接形式中,张拉后的螺杆使放置于木孔内且紧贴木孔壁的套管顶紧钢填板;在节点受力初期,主要利用钢填板与套管间的摩擦力抵抗钢填板相对于木槽的滑移.为研究连接性能,对单个新连接节点以及普通螺栓连接节点进行了抗拉试验,试验结果表明,新连接节点具有较好的承载力和刚度;在控制节点受力的情况下,节点延性也较合理.另外,考虑到《木结构设计规范》GB5005—2003对销轴类连接节点顺纹端距的严格要求,又对一组端距小于规范要求的单个新连接节点进行了顺纹抗拉试验,试验结果表明,小端距的新连接节点承载力和刚度仍优于普通螺栓连接节点;同样,在控制节点受力的情况下,节点延性也较合理.An innovative joint for timber structures, named prestressed tube bolted joint with slotted-in steel plate, was designed to improve the low slip modulus of bolted joints. Different from bolted joints, the innovative joints resisted the slip of steel plate by the friction between steel plate and tubes which were inserted into timber holes tightly and prestressed by a pretensioned bolt. Loading tests of single innovative joints and single bolted joints in tension were conducted, which indicated that single innovative joints outshined single bolted joints in load-bearing capacity and slip modulus. The ductility of innovative joints was also desirable if load was controlled. Considering the great minimum end distance for dowel-type joint specified by the code for design of timber structures GB5005--2003, another group of single innovative joints with end distance smaller than that the code required were tested in tension parallel to timber grain, which indicated that innovative joints with smaller end distance also dwarf bolted joints in load-bearing capacity and slip modulus, with the desired ductility if the load was controlled.

关 键 词：钢填板预应力套管螺栓连接 抗拉试验 刚度 承载力 延性 

分 类 号：TU366.2[建筑科学—结构工程]