Research On The Application Of The Reinforced Bridge Structures With Carbon Fiber Sheet

Strengthening Concrete Structure with Fiber Reinforced Plastic(FRP) is a new Structural repair method in recent years. Because of its resistance to electrochemical erosion, low manpower demand for application and minimal changes in geometrical dimensions of the member, the method has been found to be economical and efficient for wide application in many repairs of bridge.However, the analysis for RC structures reinforced with FRP has lagged behind practical applications. In this paper, using ANSYS, large-scale finite element software, analysising Yunlong bridge as engineering example, Some analysis methods of similar members for stiffness and stress are obtained by force-loading analysis. The results show that affixed FRP for increasing load-carrying capacity and stiffness is efficient.The thickness and elastic-modulus FRP inflects repair effects crucially. This research selects different thickness and Proper of FRP used to carry out force-loading analysis, which presents rules of the deflection and stress as thickness and elastic-modulus changing.By comparing the one-stage loading with two-stage loading, strain lag ofCFRP effects its high strength property considerably, And the load-carrying capacity for one-stage load is less than for two-stage load. So removing dead load is necessary to utilize its high strengthening property adequately.The paper calculates with 3D finite element model avoids the shortage of traditional internal-force analysis method. The methods is an important basement to choose reliable strengthening schema. The method of internal-force analysis has some reference value to other dangerous bridge strengthening.