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

ZHANG Feng; XU Xiang-feng; LI Shu-cai

doi:10.3879/j.issn.1000-0887.2015.12.008

Volume 36 Issue 12

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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

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

doi: 10.3879/j.issn.1000-0887.2015.12.008

¹Geotechnical and Structural Engineering Research Center, Shandong University, Jinan 250061, P.R.China;²Department of Civil Engineering, Shandong Jiaotong University, Jinan 250023, P.R.China

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

Abstract

Abstract

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.
- concrete,
- strengthen,
- unified bond-slip model,
- HB-FRP,
- bond strength,
- effective bond length

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References(24)

References

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