ZHANG Feng, XU Xiang-feng, LI Shu-cai. A Unified Bond-Slip Model for HB-FRP Strengthened Concrete Structures[J]. Applied Mathematics and Mechanics, 2015, 36(12): 1294-1305. doi: 10.3879/j.issn.1000-0887.2015.12.008
Citation: ZHANG Feng, XU Xiang-feng, LI Shu-cai. A Unified Bond-Slip Model for HB-FRP Strengthened Concrete Structures[J]. Applied Mathematics and Mechanics, 2015, 36(12): 1294-1305. doi: 10.3879/j.issn.1000-0887.2015.12.008

A Unified Bond-Slip Model for HB-FRP Strengthened Concrete Structures

doi: 10.3879/j.issn.1000-0887.2015.12.008
Funds:  The National Science Fund for Young Scholars of China(51108249)
  • Received Date: 2015-03-25
  • Rev Recd Date: 2015-11-13
  • Publish Date: 2015-12-15
  • In order to simplify the bond-slip models for the HB-FRP strengthening technology, the expression of a unified bond-slip model for HB-FRP strengthened concrete structures was assumed based on a previously built partition bond-slip model. The distribution of bond stress was deduced. The bond force of the HB-FRP was divided into 2 parts: one from the EB-FRP and the other from the steel fasteners. The relationship between load on FRP and slip was derived based on the energy method. The interfacial slip was investigated with the theoretical and numerical methods. The undetermined coefficients in the bond-slip model were formulated based on the model test results. The research results show that, the unified bond-slip model for HB-FRP strengthened concrete structures can effectively predict the bond strength and effective bond length of HB-FRP.
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