- ISSN 0258-2724
- CN 51-1277/U
- EI Compendex
- Scopus
- Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
- Chinese S&T Journal Citation Reports
- Chinese Science Citation Database
| Citation: | HOU Suwei, TANG Zhiqian, TIAN Shuheng. Design and Test Study of New Dual-Curved Carbon Fiber-Reinforced Polymer Plate Anchorage[J]. Journal of Southwest Jiaotong University. doi: 10.3969/j.issn.0258-2724.20250086
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To address the issues of uneven transverse distribution of compressive stress in existing carbon fiber-reinforced polymer (CFRP) plate anchorage technology, which leads to tearing failure of plates under tension and the difficulty in controlling bolt preload, a dual-curved CFRP plate anchorage was developed. This device’s main construction features were outer clamping plates with transverse arc surfaces to ensure uniform transverse distribution of compressive stress sustained by the CFRP plate and inner clamping plates with longitudinal arc surfaces to fully compress the middle section of the anchorage zone and avoid shear failure at the ends. The compressive displacement of the outer clamping plates was controlled by the limit plate to anchor the CFRP plate with the required preload. The anchorage performance test for six groups of new anchorage specimens was carried out to explore their stress-bearing principle. Finite element software ANSYS was used to perform stress simulation; the key parameters affecting anchorage performance were deeply analyzed; the stress-bearing performance of CFRP plate anchorage was compared with that of flat-plate anchorage. The results indicate that the thickness of the outer clamping plates is the dominant factor influencing the non-uniform transverse distribution of compressive stress sustained by CFRP plates. When the thickness of outer clamping plates is 27 mm, the CFRP plates exhibit a higher uniform transverse distribution of compressive stress, with a compressive stress difference of only 9.3 MPa between maximum and minimum values. The curved surface design of inner and outer clamping plates effectively optimizes the compressive stress distribution state of the CFRP plate, while minimizing stress difference among carbon fibers and resulting in significantly improved synchronization of transverse deformation of CFRP plates. Although the specimens ultimately fail in a tearing state, the new anchorage achieves an exceptional anchoring efficiency coefficient of 104.16%.
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