A theoretical solution for the pullout properties of a single FRP rod embedded in a bond type anchorage. Issue 4 (17th February 2020)

• Record Type: Journal Article
• Authors: Huang, Pingming; Sun, Yamin; Mei, Kuihua; Wang, Tao
• Is Part Of: Mechanics of advanced materials and structures. Volume 27:Issue 4(2020)
• Page Start: 304
• Page End: 317
• Publication Date: 2020-02-17
• Subjects: Bond type anchorage -- theoretical solution -- maximum pullout load -- shear stress distribution -- load–slip relationship -- FRP rod; Composite materials -- Mechanical properties -- Periodicals; Composite construction -- Periodicals; 620.118
• DOI: 10.1080/15376494.2018.1472344
• Languages: English
• ISSNs: 1537-6494

Abstract

ABSTRACT: This paper proposes a theoretical solution for predicting the pullout properties of a single fiber-reinforced polymer (FRP) rod embedded in a bond type anchorage based on a trilinear bond–slip model. The radial variation of the shear stress and reaction of the steel sleeve are considered in the solution. Pullout procedure with elastic, elastic-softening, elastic-softening-debonding, pure softening, softening-debonding, and debonding stages, as well as the corresponding critical stages, are analyzed. In this theoretical solution, the maximum pullout load, shear stress along the rod–grout interface, axial tensile stress of the FRP rod, and load–slip relationship are derived with explicit formulations. Effective bond length of bond type anchorage is also discussed. The solution is validated against experimental results available in literature. The theoretical solution reveals that the anchorage may attain its maximum pullout load in the elastic-softening, pure softening, or elastic-softening-debonding stage. Moreover, the effects of embedded length, ultimate shear stress, and residual shear stress on maximum pullout load closely related with the stage in which the anchorage attains its maximum pullout load. However, the effect of radius of FRP rod on the maximum pullout load increases with the embedded length, no matter in which stage the anchorage attains its maximum pullout load.