Bond-slip and anchorage of glass fiber reinforced polymers rebars for concrete: experimental tests and numerical modelling

Details

Supervisors

Saraiva Esteves Pacheco De Almeida, João ; Antónia A, Correia

Faculty

Ecole polytechnique de Louvain

Degree label

Master [120] : ingénieur civil des constructions, à finalité spécialisée

Abstract

In light of the corrosion challenge faced by traditional steel rebars in reinforced concrete, the exploration of fiber-reinforced polymers (FRP) as an alternative has garnered significant interest. This thesis focuses on investigating the impact of various surface finishes on the bond stress-slip behaviour, as well as evaluating the influence of different embedment lengths (10db, 20db, and 30db). Additionally, a subset of specimens was instrumented with Distributed Optical Fibers Sensors (DFOS) to capture strain data along the embedment length. The experimental findings were then leveraged to refine the bond parameters of a numerical bond-slip model, capable of simulating anchorage behaviour. Notably, the results indicated that rebars with rough surfaces (such as Sand-Coated and Machining) outperformed smoother counterparts, exhibiting higher bond strengths. As for the embedment length effect, a discernible trend emerged: an increase in embedment length correlated with a decrease in bond strength due to a non-uniform distribution and the increasing presence of defects along the embedment length. I