Analysis at the Ultimate State Limit

An ultimate limit state analysis requires to establish the value of the FRP reinforcement so that the design factored moment, Msd, and the flexural capacity of the strengthened structure, Mr i, satisfy the following inequality  

Ultimate limit state analysis of the FRP-strengthened r.c. sections rehes on the following hypothesis  

Cross-beam sections, perpendicular to the beam axis prior to deflection remain still plane, so that the diagram of normal deflections is linear. 

A perfect bond exists between materials (FRP and concrete, and steel and concrete) 

Constitutive laws for conaete and steel are abided by in compliance with the current building code 

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