 Bond of FRP bars in concrete and its effect on serviceability behavior of reinforced concrete elements THESIS TOPIC PROPOSAL Institute: Budapest University of Technology and Economics civil engineering Pál Vásárhelyi Doctoral School of Civil Engineering and Earth Sciences Thesis supervisor: Sándor Sólyom Location of studies (in Hungarian): Építőanyagok és Magasépítés Tanszék Abbreviation of location of studies: EOEM Description of the research topic: One of the key aspects of reinforced concrete design is the interaction between concrete and reinforcement. Adequate bond is necessary to ensure that sufficient force transfer occurs between the concrete and the reinforcement, hence composite action can be relied upon. Steel bars are commonly used as reinforcement, however, in an application where steel corrosion might be an issue, Fibre Reinforced Polymers (FRP) have been increasingly used as alternatives. The bond mechanisms of FRP bars in concrete are different than that of steel bars due to different material, physical and mechanical properties. In this research, the influence of critical factors will be studied on the bond behavior of FRP bars and the effect of FRP-concrete interaction on the Serviceability Limit State (SLS) behavior. The goal of the current research is to improve the understanding on the bond behavior of FRP bars and to develop local bond stress-slip models. Furthermore, serviceability behavior for FRP reinforced concrete elements are investigated as well. During the PhD study an extensive literature review should be performed based on which knowledge gaps are to be localized and addressed in the research (by means of developing of experimental, analytical and numerical working programs). In next steps the previously defined working programs are performed, and findings are disseminated in scientific publications. Proposed research methodology includes experimental investigation and description of local bond stress behavior of FRP bars as well as analytical and numerical modelling. Deadline for application: 2024-05-31 |