Analysis of stability of long-span concrete filled steel tube arched bridge in construction

The two methods for stability analysis,i.e.,the linear and nonlinear buckling analysis,were introduced.Then according to Jiangxi Ji'an Ganjiang concrete-filled steel tubular arch bridge,some aspects about stability were discussed.The results show that the coefficients of stability are smaller when the concrete is filled but not frozen and coefficients of stability increase when the concrete in the tube is frozen;the nonlinear must be considered in the analysis of stability of CFST arch bridge in construction;the material nonlinear has a greater influence than the geometrical nonlinear on the stability of the bridge.