Analysis Of Sidewise Buckling Of Biaxial-Symmetry I-Section One-Centered Arch And Analytic Solusion

As a special curved girders , one-centered arch of streamline shape have been applied widely in highway bridges and interchange facilities.Theoretical studies of curved girders mainly adopted the methods of balanced method , energy method and variation-based method of virtual work ( displacement ) . In this paper , deductive process of sidewise buckling of biaxial-symmetry I-section one-centered arch by balanced method and energy method were introduced respectively , then two elastic equilibrium differential equation of spatial lateral flexure and torsional of one-centered arch could been accepted .Based on the two elastic equilibrium differential equation , author deducted analytic solusion of critical load of sidewise buckling of one-centered arc under uniform radial load and the same bending moment at both ends .At the last of this paper , two examples were given to calculate the critical load of sidewise buckling of one-centered arch , then these analytical numerical result proved that the formulas were true .