Fatigue Performance Experimental Research of Pre-stress CFRP Reinforcing Bridge Structure

Abstract:

Humdrum static load experiment and fatigue experiment were made on two groups of carbon fiber,the carbon fiber reinforced with plastics and the carbon fiber reinforced with girder,under different pre-stress levels to investigate fatigue load of fatigue experiment girder and the expansion of crack under each load rank acting,the strain and displacement.And the crack load,yielding load and ultimate load are obtained.Results show that with the increasing of pre-stress level,width and length of the crack decrease.Meanwhile,the displacement decreases obviously too.The yielding load and the ultimate load and the ultimate load have different increments.