内嵌CFRP筋与木材的粘结锚固性能试验研究  

Experimental Research on NSM CFRP Bar-to-wood Bond Behavior

作　　者：张富文[1,2] 许清风[1,2] 李向民[1,2] 陈建飞[3] 贡春成[1,2] 

机构地区：[1]上海市工程结构新技术重点实验室,上海200032 [2]上海市建筑科学研究院(集团)有限公司,上海200032 [3]贝尔法斯特女王大学

出　　处：《结构工程师》2014年第5期146-153,共8页Structural Engineers

基　　金：东南大学城市与建筑遗产保护教育部重点实验室开放课题(KLUAHC 1009)

摘　　要：为研究内嵌CFRP筋与木材的粘结性能,本文共制作了8个试件,试验参数包括木材种类(旧花旗松和新花旗松)和粘结长度(80 mm、120 mm和160 mm)。试验获取了木材与CFRP筋粘结破坏的两种典型模式:CFRP筋与胶层粘结失效破坏、沿粘结面的周边木材失效破坏。胶层与CFRP筋的粘结滑移过程可分为微滑移段、滑移段、下降段和残余段。在试验基础上对改进BPE模型粘结滑移曲线进行了拟合,拟合曲线与试验曲线吻合较好,说明改进的BPE模型能较好地描述木槽中胶层与CFRP筋的局部粘结滑移曲线,具体的参数取值还需后续试验进行补充深化研究。Pull-out tests of eight specimens were conducted to study the bond behavior between near -surface mounted （ NSM） CFRP bar and wood .Wood type and bonded length were investigated as the test parameters . The former included two types of wood：old and new Douglas fir .The latter included three bond lengths：80 mm, 120 mm and 160 mm.Two typical failure modes were observed , including failure at the CFRP bar-adhe-sive interface and failure in wood near the glue-line.The slip process between CFRP bar and adhesive could be described by micro-slippage segment , slippage segment , descending segment and residual segment .The modified BPE model of local bond stress-slip with fitted parameters was shown a good agreement with test curves, but much further research is needed to determine the parameters in the model .

关 键 词：木材 粘结锚固性能 CFRP筋 内嵌 滑移 粘结长度 

分 类 号：TU366.2[建筑科学—结构工程] TU317