FRP reinforcement at sagging and hogging zones in continuous beams: Iifluence on redistribution of moment

TL;DRAbstract

The actual design methodologies, based on the up-to-date codes, very often allow or in some cases require the application of non linear-procedures, particularly in seismic zones. The check of the structural elements is not always related to strength requirements only, but also to ductility aspects. Ductility is a fundamental structural property because it allows stress redistribution and provides warning of oncoming failure. In well-designed steel reinforced concrete beams the failure is announced by yielding of the steel reinforcement, followed after significant deformation with no substantial loss of load carrying capacity, by concrete crushing. 
\nThe application of external sheets of FRP materials, currently considered an almost common practice in the framework of strengthening and rehabilitation of r.c. structures, can sharply affect the failure mode and the local and global ductility of the structure.
\nAim of the present paper is an evaluation of the moment redistributio

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