Load cycling fatigue and strength evaluations for modular fiber reinforced polymer (FRP) composite decks are presented. The FRP composite deck is made of pultruded components that are bonded and interlocked. The emphasis of this work is to present an innovative fatigue experimental qualification program for FRP composite bridge decks. Fatigue live loads are computed based on AASHTO highway bridge specifications. Variations of strain and deflection measurements characterize the fatigue and strength performance of the FRP deck. Limitations in applying the existing AASHTO highway bridge specifications to fatigue design of FRP composite decks are discussed.
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