Effects of Freeze-Thaw Cycling and Sustained Load on FRP-Concrete Interface


  • The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.

International Concrete Abstracts Portal


Title: Effects of Freeze-Thaw Cycling and Sustained Load on FRP-Concrete Interface

Author(s): Jiawei Shi, Hong Zhu, Zhishen Wu, and Gang Wu

Publication: Special Publication

Volume: 275


Appears on pages(s): 1-20

Keywords: concrete structure, durability, freeze thaw, FRP, bond interface, sustained load

Date: 3/1/2011

This paper presents an experimental investigation into the bond behavior between basalt FRP (BFRP) sheet and concrete substrate under coupled effects of freeze-thaw cycling and sustained load. Specially designed double-lap shear specimens were exposed to up to 200 freeze-thaw cycles with sustained load. After exposure, the specimens were tested to failure. Digital Image Correlation (DIC) test method was applied to capture the full-field strain in the study. Nonlinear constitutive law of FRP-concrete interface was determined based on full-field deformation and strain analysis. Test results show that freeze-thaw cycling leads to significant decreases in load carrying capacity, ultimate slip, shear strength and increases in effective stress transfer length of FRP-concrete interface. Additional damage is generated when the load condition is taken into account during freeze-thaw cycling test. Moreover, apparent changes in failure mode were found with the increasing number of freeze-thaw cycles.