Performance of underwater concrete column reinforced with curved surface space FRP grid under axial compression
Wei Yang1 Zhang Xi1 Wu Gang2 Ji Jun1 Zhang Min3
1. Nanjing Forestry University, Nanjing 210037, China;
2. Key Laboratory for RC and PRC Structures of the Ministry of Education, Southeast University， Nanjing 210096， China;
3. Beijing Texida R & D Co., Ltd., Beijing 100011, China
Abstract：Plane FRP grid has the application advantages in strengthening special structures due to its excellent performance, but it may not be applicable to strengthening the concrete structures with small-size surface or special shape. In this study, the manufacturing technologies of curved surface space FRP grid were put forward, then the curved surface space FRP grid products were manufactured and the tensile mechanical properties of the FRP grid were tested. Moreover, the construction technology of underwater concrete columns reinforced with the curved surface space FRP grid was proposed and the axial compressive performance of the columns was investigated. The test results show that the compressive performance of the underwater concrete columns reinforced with curved surface space FRP grid is much better than that of the unreinforced specimens. With the increase in the amount of the fiber in FRP grid, the load carrying capacity and deformation capacity of the reinforced specimens can be increased effectively and can approach those of the reinforced specimens on the land. According to the amount of fiber in FRP grid, the stress-strain curve of underwater reinforced column may exhibit a softening, hardening or critical behavior, and the existing FRP-confined concrete models can predict very well the ultimate stress and ultimate strain of underwater concrete columns reinforced with curved surface space FRP grid.
魏洋 张希 吴刚 纪军 张敏 . 空间曲面纤维网格制作及加固水下混凝土柱试验研究[J]. 土木工程学报, 2017, 50(10): 45-53.
Wei Yang Zhang Xi Wu Gang Ji Jun Zhang Min. Performance of underwater concrete column reinforced with curved surface space FRP grid under axial compression. 土木工程学报, 2017, 50(10): 45-53.
