用无机胶粘贴CFRP布加固损伤组合梁受弯性能-《郑州大学学报(工学版)》

文章信息/Info

Title:: Flexural Behavior of Damaged Composite Beams Externally Strengthened withCFRP Sheets Bonded with Inorganic Adhesive

Author(s):: CHEN Weihong; MA Jingming; CUI Shuangshuang; (1.School of Civil Engineering, Fuzhou University, Fuzhou 350108, China;2. Power Grid Department, State Nuclear ElectricPower Planning Design & Research lnstitute, Beijing 100095, China; 3. College of Civil Engineering, Fujian University of Tech.nology,Fuzhou 350108,China

Keywords:: inorganie adhesive; CFRP sheets; strengthen; composite beam ; flexural behavior

Abstract:: Organie epoxy adhesives are usually used in strengthening conerete structures with carbon fiber re-inforeed polymer (CFRP) sheets. However, due to the low soltening points of organie adhesives which are a.bout 60 9℃ , conerete structures strengthened with CFRP sheets bonded with organie epoxy adhesives can nomeet the heat resisting requirements. In this paper, an inorganie adhesive, which can resist at least 600 9high temperature, was prepared to paste CFRP sheets to strengthen four simply supported bonded prestressedeomposite beams eneased cireular steel tube truss after ulimate limit slate, and test on lexural behavior olthese four beams was also performed. Moreover, normal section load-bearing capacity of these beams and theeurve load-delleetion at mid-span were obtained. Experimental results show that it is feasible to strengtheneonerete members with CFRP sheets bonded with inorganie adhesive. Based on the experimental results andtheoretieal study, computational method of stiflness is proposed for caleulating bending rigidity and normal see.tion load-bearing capacity of conerete simply supported beams strengthened with CFRP sheets bonded with in.organie adhesive. The formula of ben