Bond-slip model for FRP-to-concrete interface

Xinzheng Lu, Lieping Ye, Jinguang Teng, Jiangbo Zhuang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

74 Citations (Scopus)


The local fiber reinforced polymer (FRP)-to-concrete bond-slip model is the fundamental relationship to analyse the behavior of FRP-strengthened RC structures. Due to the peculiarity of the load-bearing mechanism of FRP-to-concrete interface, it is hard to acquire their bond-slip relationship directly from test, so the existing bond-slip constitutive models have more or less unsolved problems. In this paper, a group of new models and the formulas for calculating the debonding strength of interface are presented based on the predictions of a meso-scale finite element model. These models are named as Precise Model, Simplified Model and Bilinear Model respectively according to different levels of sophistication. Among them, the Precise Model can consider different stiffnesses of adhesive layer, while Simplified Model and Bilinear Model are suitable for normal adhesive layer. Through comparisons with the large test database, the suggested bond-slip models are shown to provide more accurate predictions of both the debonding strength and the strain distribution in the FRP sheet than the existing models.
Original languageChinese (Simplified)
Pages (from-to)10-18
Number of pages9
JournalJianzhu Jiegou Xuebao/Journal of Building Structures
Issue number4
Publication statusPublished - 1 Aug 2005


  • Bond-slip model
  • Debonding strength
  • Fiber reinforced polymer
  • Interfacial bond property

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction

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