Research And Analyze Of PPFRC Continuous Girder Bridge Compute Method And Theory

PPFRC is a kind of new concrete with high performance composed of Reinforced Concrete,Ferro Concrete and Steel Fiber Reinforced Concrete(SFRC). It becomes PPFRC (Partially Prestressed Fiber Reinforced Concrete) structure when applied to continuous girders。According to the idea that is from the experiment to theory study to actual engineering practice,this thesis provides to us a regressive analysis of positive-section bending strength, inclined section's anti-shear strength and resist-fatigue strength for PPFRC beam. The research and the analysis of structure are based on large numbers of experiments of PPFRC beams and PPFRC girders. It gives a computed mode which combines the method of stress balance and the method of equivalent concessional tensile-stress. At the same time the applied computing method and approach are educed. The assembling construction of PPFRC is introduced in detail. Finally by the comparison of different span of PPFRC girders, we draw the conclusion that the economy index and prestressing degree of PPFRC are less than the same span of PPRC simple supported beams and continuous girders. Therefore we can get a stabilized theory basis for the actual engineering appliance of PPFRC from the research.