CFRP-混凝土界面黏结-滑移关系试验  

Experiment on the Bond-Slip Relationship of CFRP-to-Concrete Interface

作　　者：孙延华[1] 叶苏荣[2] 熊光晶[1] 刘金伟[1] 

机构地区：[1]汕头大学土木工程系,广东汕头515063 [2]昆明理工大学建筑工程学院,云南昆明650000

出　　处：《建筑材料学报》2014年第6期959-964,共6页Journal of Building Materials

基　　金："十一五"国家科技支撑计划项目(2006BAJ03A07);广东省自然科学基金资助项目(5008283)

摘　　要：为测得FRP-混凝土界面黏结-滑移本构关系的下降段,改进了前期提出的双拉试件,设计了水平加载方案.利用MTS加载系统对9个改进试件进行加载测试,实测出18个测区的CFRP-混凝土界面黏结-滑移（δ-τ）关系曲线的下降段和最大滑移量,从而得到18条完整的实测δ-τ关系曲线,并依此给出1个回归公式.所测得的CFRP-混凝土界面间黏结-滑移曲线3大关键控制参数为峰值剪应力τf2.27-5.19MPa,峰值剪应力对应的滑移量δf0.031~0.077mm,最大相对滑移量δu0.087~0.223mm.In order to capture the descent stage of the δ-τ relationship of FRP-to-concrete interface, an early designed ＂double pull＂ specimen was modified. A horizontal loading scheme by using a MTS electro-hy- draulic servo system was designed. Nine modified specimens were prepared, and eighteen whole measured δ-τ curves with the descent stage and ultimate slip were obtained. A δ-τ regression equation was provided based on the tested data. The tested 3 key parameters （the maximum bond stresss δf, the corresponding slip δf, and the ultimate slip δu） of the bond-slip relationship of CFRP-to-concrete interface were ranged within 2.27-5.19 MPa, 0. 031 -0. 077 mm,and 0. 087 -0. 223 mm under the given experimental condi- tions.

关 键 词：CFRP 黏结-滑移 双拉试件 下降段 剥离 

分 类 号：TU377.9[建筑科学—结构工程]