| 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τf 227～519MPa，峰值剪应力对应的滑移量δf 0031～0077mm，最大相对滑移量δu 0087～0223mm. |
| 关键词: CFRP 黏结滑移 双拉试件 下降段 剥离 |
| DOI：103969/jissn1007 9629201406004 |
| 分类号: |
| 基金项目:“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） |
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| Experiment on the Bond Slip Relationship of CFRP to Concrete Interface |
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SUN Yanhua1, YE Surong2, XIONG Guangjing1, LIU Jinwei1
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1.Department of Civil Engineering, Shantou University, Shantou 515063, China;2.Faculty of Civil Engineering and Mechanics, Kunming University of Science and Technology, Kunming 650000, China
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| Abstract: |
| 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 hydraulic 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 τf, the corresponding slip δf, and the ultimate slip δu) of the bond slip relationship of CFRP to concrete interface were ranged within 227519MPa, 00310077mm，and 00870223mm under the given experimental conditions. |
| Key words: CFRP (carbon fiber reinforced polymer/plastic) bond slip double pull specimen descent stage debonding |
