Research On Fatigue Resistance Of The Reinforced Concrete Plate Girder Bridge

Under the joint actions of the dead-load and repetitive loading, many concrete bridges suffered different degrees of fatigue issues. For years, in the field of fatigue resistance and fatigue life prediction of the concrete structure, domestic and foreign experts have made a number of valuable academic and practical achievements.Fatigue detection, evaluation and reinforcement technology of bridge structure and the remaining service life prediction based on above mentioned have now become international and domestic engineering hot spot. Aiming at fatigue performance and fatigue life Prediction of bridge reinforced Concrete Plate Girder, the main research work in this text was focused on:(1)Static loading and fatigue tests were done on reinforced Concrete Plate Girder under different load range, annalyzed on the concrete strain in the compression zone and the steel strain in the tension zone,mid span deflection and crack development under deferent fatigue times.We also estimated the service life under fatigue load ranges.(2)Based on the fatigue test data, we fitted S-N curves of the reinforced Concrete Plate Girder under the fatigue load.(3)By Experimental studies Researched load-displacement, stress and strain of the plate girder bridges of transverse Connection load-displacement under fatigue load(4)We created a method to predict the fatigue life of the reinforced Concrete Plate Girder, under constant amplitude loading and same rank. Data also provided verification on the residual stiffness analysis method on reinforced Concrete Plate Girder fatigue damage analysis.