Study On Contributory Factors On The Internal Force And Deformation Of P.C. Continuous Curved Girder Bridge

It is the wide application of P.C.continuous curved box-girder bridge which has become an important bridge style in the transportation infrastructure. First of all, the paper recommended the basic theory of curved girder bridge and deduced the procedure of calculation,such as Volasov's elasticity theory of thin-walled structure, differential equation of plan curved girder and circular differential equation about force-strain.It also expatiated solution of structural mechanics and method of finite element,and expounded several models of method of finite element. The development of finite element program is recommended in this paper .Compared with all-purpose finite element program, finite element program of exclusive use on bridge has its predominance in bridge structure calculation such as MIDAS/Civil.Then taking fly-over bridge for example, the paper carried out a great deal of calculation and comparison by MIDAS/Civil to the main contributory factors of curved bridge such as cross beam, curvature radius,bearing to resist torsion,bearing offcentre.It is remarkable that setup of cross beam, length of curvature radius and eccentric distance of bearing affect internal force and deformation in curved girder bridge. Especially the paper analyzed bearing eccentricity in detail,and brought forward the method of calculating suitable eccentric distance.Lastly design of P.C. continuous curved girder bridge is discussed in the paper, in especial prestress reinforcing steel bar's loss and bearing design.