Aiming at improving bond strengths between FRP sheet and concrete, the FRP sheet bonding method using high elongation elastic resin as a buffer layer was developed. In this study, bonding tests was conducted to clarify the basic bond characteristics of FRP strand sheet-concrete interface with a polyurea resin. As a result of the bonding tests, it was found that the use of the polyurea resin as a buffer layer significantly improved the bond strength and the interfacial fracture energy between FRP sheets and concrete. In addition, bond stress-slip relationships with a polyurea resin were proposed. Finally, numerical analyses of bonding CFRP strand sheets and concrete were conducted so as to verify va-lidity of the proposed bond stress-slip relationships. This paper is an extended version in English from the authors’ previous work [Kobayashi, A., Ozaki, M., Sato, Y., Arazoe, M., Tateishi, A. and Komori, A., (2020). “Study on bonding behavior of FRP sheets and concrete bonded with high elongation elastic resin.” Journal of Structural Engineering, JSCE, 66A, 855-867. (in Japanese)].

为了提高FRP板与混凝土之间的粘结强度，开发了使用高伸长率的弹性树脂作为缓冲层的FRP板粘结方法。在这项研究中，进行了粘结测试，以阐明FRP股薄板-混凝土界面与聚脲树脂的基本粘结特性。作为粘结试验的结果，发现使用聚脲树脂作为缓冲层显着提高了FRP板和混凝土之间的粘结强度和界面断裂能。另外，提出了与聚脲树脂的粘合应力-滑动关系。最后，对粘结的CFRP板和混凝土进行了数值分析，以验证所提出的粘结应力-滑移关系的有效性。本文是作者先前工作的英文扩展版[Kobayashi，A.，Ozaki，M.，Sato，Y.，Arazoe，M.，Tateishi，A.和Komori，A.，（2020）。“玻璃纤维板与高伸长率弹性树脂粘结混凝土的粘结性能研究。”结构工程杂志，JSCE，66A，855-867。（日语）]。