Flexural design methodology for concrete beams reinforced with fiber-reinforced polymers

摘要

The use of fiber-reinforced polymer(FRP)as structural reinforce- ment for concrete beams requires of flexural design methodology that provides adequate safety from brittle failure. Recognizing the absence of inelastic material behavior, it is proposed that safety for FRP-reinforced flexural members should be evaluated based on Total material strain energy density(SED)at the critical cracked Section. Safety is then defined as the ratio of SED at ultimate relative To service. A proposed minimum energy factor of safety(EFS)of 25 is Derived from a companion analysis on under-reinforced steel Beams within current code-mandated design limitations.