A NUMERICAL METHOD OF MIXED MODELING ON SHEAR DESIGN OF REINFORCED CONCRETE MEMBERS STRENGTHENED WITH CFRP LAMINATES

Abstract eng:
This paper presents a general system aimed at dealing with the failure analysis of reinforced concrete members strengthened with carbon-fiber-reinforced plastic (CFRP) sheets. It is based on the yield design theory with a mixed modeling of the structure, according to which the concrete material is treated as a classical two-dimensional continuum, whereas the longitudinal reinforcing bars are regarded as one –dimensional rods and in shear reinforced zones both the shear CFRP sheets and transverse reinforcing bars are incorporated in the analysis through a homogenization procedure and they are only in tension. The static method is then implemented numerically by means of the finite-element formulation, thus produces accurate estimates for the loading-carrying capacity of the shear members taken ad an illustrative application. Numerical predictions are in good agreement with the experimental results.

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