Open AccessFRP-Strengthening of Stretched Parts of Structural Elements by Cascade Multilayer Method
Author(s) -
A. I. Danilov
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/661/1/012064
Subject(s) - fibre reinforced plastic , cascade , reinforcement , bent molecular geometry , structural engineering , adhesive , finite element method , base (topology) , joint (building) , computer science , materials science , composite material , engineering , mathematics , mathematical analysis , layer (electronics) , chemical engineering
The purpose of research is the analysis of applicability and effectiveness of cascade type multilayer models in design of structural elements strengthening by gluing on their surfaces fiber reinforced polymers (FRP). Materials and methods: variants of using the FRP-reinforcement for stretched and bent elements with application of FEM simulation and analytic approach. A number of diagrams and tables represent the results. Design examples include the analysis of the adhesive joints application to attach FRP elements. Results are: justification of an efficient and cost-effective method of strengthening the stretched and/or bent elements to increase their bearing capacity reserves, the features of the bonded joint behavior, the equations and formulae for analysis and design. Analytical expressions are obtained and presented for designing the cascade strengthening schemes. Conclusions: the expression “cascade” reflects the features of the proposed strengthening layout, the reinforced (base) element unloading progress gradually along its length with each successive reinforcement element (strengthener) attached. The results suggest the possibility of effective use of adhesive joints to strengthen rather strong, including steel, elements. The cascade method allows to diminish the strength level of applied materials, thereby reducing the cost of reinforcement structures and increases the safety level of the reinforcement structure.