Mechanical Analysis Of Curved Girder Bridges And Theoptimal Placement Of Stranded Wire

With the society developing rapidly,the number of vehicle has increased sharply.It has aroused that the traffic pressure increased especially in many megacities.To coping with this pressure,the governments have beginning to build viaducts which have many advantages such as the stronger traffic capacity and the faster traveling speed.So the curved bridges have play an important role in many flyovers,bridge-approaching and viaducts.In the modern traffic system,it plays an influential role.This paper considers the mechanical properties and the influence factors of the stress of the curved girder bridges.It also discusses the calculation theory and method of the curved girder bridges.Based on a certain engineering,using the large-scale finite element software MIDAS FEA establish solid element model to analyze the radius of curvature which will influence the end reaction and the bilateral difference of the stress and the deflection of the main girder.This paper analyses the curved girder bridges' stress under the different working conditions of moving load.Meanwhile,about the pre-stressed concrete curved girder bridges,this paper deduce formula of pre-stressing loss at the differentradius of curvature.And it analyze the changing rule of pre-stressing loss through the model.This paper builds a mathematical model which analyses dosage of pre-stressed steel to find optimal program.Nowadays,the tradition way of bridge design is checking.By building mathematical model,the passive method of bridge design has been changed to be a way of initiative design.Implication of this paper introduces the new method of design,trying to find a breakthrough of traditional design.In the future,the solution of this paper will be reference for similar applying.