Abstract
This paper attempts to predict the nonlinear pull-out response of fiber reinforced polymer (FRP) rods embedded in steel tubes filled with cement grout. Based on a tri-linear bond-slip model, the whole FRP rod is divided into three zones: linear elastic, softening, and frictional. In each zone, a set of two second-order ordinary differential equations are established in terms of the displacements of the FRP rod and steel tube and solved in an analytical manner. When the thickness of the steel tube approaches infinity, the solution can be applied to the problem of FRP rods embedded in rock. Based on the derived solution, the interfacial bond properties and snapback phenomenon are discussed. After the analytical solution is validated by comparisons with four sets of experimental data, the effects of the radius and length of FRP rods, the local peak bond stress and the residual frictional strength on the maximum pull-out load are evaluated through sensitivity analysis. © 2014 Elsevier Ltd. All rights reserved.
| Original language | English |
|---|---|
| Pages (from-to) | 129-137 |
| Number of pages | 9 |
| Journal | Construction and Building Materials |
| Volume | 58 |
| Online published | 4 Mar 2014 |
| DOIs | |
| Publication status | Published - 15 May 2014 |
| Externally published | Yes |
Funding
The authors are grateful for the financial support received from the Research Grants Council of the Hong Kong SAR with No: PolyU 514311 , the Natural Science Foundation of China with Nos: 51278441 and 51379188 , and the Natural Science Foundation of Zhejiang Province with No. LY12E08022 , of China.
Research Keywords
- Analytical solution
- Bond-slip relationship
- FRP rod
- Ground anchor
- Pull-out
RGC Funding Information
- RGC-funded