Design Optimization and Experimental Study of CFRP Plate Anchorage with Clip-Extension Type

Authors

QI Yijia, School of Civil and Environmental Engineering, Changsha University of Science & Technology, Changsha, Hunan 410114, ChinaFollow
XIAO Dan, School of Civil and Environmental Engineering, Changsha University of Science & Technology, Changsha, Hunan 410114, ChinaFollow
WANG Zhongqiang, School of Civil and Environmental Engineering, Changsha University of Science & Technology, Changsha, Hunan 410114, China

Corresponding Author

肖丹, 男, 博士, 讲师. E-mail: xdhxx@csust.edu.cn

Abstract

Existing anchorage is prone to damaging the carbon-fiber reinforced polymer (CFRP ) plate due to the “notch effect ” and uneven distribution of clamping stress.This study proposed a new clip-extension type anchorage for the CFRP plate.This design utilized the ductility of steel for stress diffusion and guided the compressive stress zone in the CFRP plate away from the notched end,realizing a smooth transition of the clamping force of the CFRP plate at the clip port and effectively reducing the “notch effect ”.The design also reduced the strain difference between the carbon fibers,resulting in a more synchronized lateral deformation of the CFRP plate and reducing the risk of splitting damage.A comparative study of new anchorages,commonly used clip-inward retraction anchorages,and angle difference anchorages was conducted.Through finite element modeling analysis and static load tensioning test,the force transmission mechanism of the new anchorage system under different design variables was analyzed,and the design parameters were optimized.The results show that the conventional anchorage damage in the form of CFRP plate notch damage for clip-inward retraction has an anchoring efficiency of only 60.42%.The angular difference design leads to excessive compressive stress gradient on the cross-section of the CFRP plate,which produces asynchronous tension strain.The damage form is split first and then tensile shattering,and the anchoring efficiency is less than 80%.The anchoring efficiency of the clip-extension type anchorage for the CFRP plate is as high as 90.83%,which effectively avoids the “notch effect ” and splitting damage,and has high practical application value in engineering.

Publication Date

12-24-2025

DOI

10.14048/j.issn.1671-2579.2025.06.022

First Page

189

Last Page

198

Submission Date

December 2025

Recommended Citation

Yijia, QI; Dan, XIAO; and Zhongqiang, WANG (2025) "Design Optimization and Experimental Study of CFRP Plate Anchorage with Clip-Extension Type," Journal of China & Foreign Highway: Vol. 45: Iss. 6, Article 22.
DOI: 10.14048/j.issn.1671-2579.2025.06.022
Available at: https://zwgl1980.csust.edu.cn/journal/vol45/iss6/22

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