汤  举，  杨会峰，  陆伟东，  王曙光
    （南京工业大学土木工程学院，南京211816）

[摘要] 通过40个胶合木植筋试件的单调加载试验，对其破坏形态、破坏机理以及粘结．滑移性能进行了研究，试验结果表明，锚固长度小于一定长度时，植筋的极限破坏荷载随锚固长度的增加而增大，当锚长达到一定水平之后，极限承载力基本不再上升，且延性和初始刚度随锚固深度的增加而增大；钢筋直径是影响胶合木植筋系统刚度的重要因素，钢筋直径越大，植筋的刚度越大；在胶层和胶层与木基材界面不发生破坏的前提下，增大胶层厚度，其承载力略微增大，且试件拉拔过程中的初始刚度随胶层厚度的增大而明显变小；光圆钢筋由于表面光滑，在试验过程中发生了胶层与钢筋表面的界面粘结破坏，极限破坏荷载仅为同样直径螺纹钢的63.8%。
[关键词] 胶合木；植筋；粘结-滑移；试验；公式拟合
中图分类号：TU366    文献标识码：A  文章编号：1002-848X(2011) S2-0457-06

    Experimental study on glued-in rods for timber structure
    Tang Ju, Yang Huifeng, Lu Weidong, Wang Shuguang
    ( College of Civil Engineering,  Nanjing University of Technology,  Nanjing 211816,  China)

Abstract: The failure modes, failure mechanism and bond-slip performance on glued-in rods for glulam by 40 specimens which were tested with monotonic load were discussed. The results show that the ultimate load increases with the anchorage length increasing when the archorage length is less than a ceItain length. When the anchorage length reach a certain requirement, the ultimate capacity stops increasing. In addition, the ductility and initial stiffness increases with anchor depth increasing. The steel bar diameter is an important factor on glued-in rods stiffness, which increases with the diameter. When adhesive and the interface with the wood don't damage,the ultimate capacity increases slightly, and the initial stiffness decreases with the layer thickness increasing. Because of its smooth surface, plain bar occur layer and steel interface failure during the testing, and the ultimate failure load is only 63. 8% of the same diameter of steel.
Keywords: glulam;glued-in rods;bond- slip;experiment;fitting formula