The Space Mechanical Properties Analysis Of Special-shaped Curve Continuous Girder Beam

In this paper, the design of four span broaden curved continuous bridge for Nanjing Metro Line3for engineering background, by means of finite element analytic soft ware Midas/Civil to analysis the mechanical properties of this bridge’s structural,and checking the result in accordance with 《TB10002.3-2005Railway Bridge reinforced concrete and prestressed concrete structural design specifications》, on the basis of load effect analysis and checking results,put forward the suggest of improve structure force,at the same time compare with the improved model and the original,discussed the rationality of change structure force form,and give the layout principles for irregular box girder’s prestressed steel beam.The main works in this paper as following:1.Based on curved beam finite element method,described in detail the deformation of differential equations of circularly curved bar, using this to calculate the longitudinal influence lines of curved beam,and compare with analytical method,discussed the advantages of this method in analysis special-shaped circularly curved bar bridge,these work provides a theoretical basis for this paper.2.By mean Midas/Civil finite element analysis software established the Nanjing Metro Line3viaduct special-shaped circularly curved bar model, analysis these condition of structural deformation、internal force and support reaction that bearing effects for dead load、 live load、prestressed load、shrinkage and creep and so on.3.Checking the bridge strength、crack resistance、stress and deformation during failure stage and service stage, gives the checking results and experience judgment relevantly.in accordance with TB10002.3-2005specifications.4.On the basis of model analysis and calculation,provide improvement suggests for background project’s structure,established a corresponding improvement model,and compare with the original model, verified the force rationality of improved structure in mechanical aspect.Through above theoretical analysis and practical design,this paper summarizes the stress characteristics of special-shaped curve continuous beam that can as a reference and guarantee for the design of similar bridges in the future.