Significance analysis study on stability of long-span curve continuous rigid frame bridge with high pier

In order to improve the safety of long-span curve continuous rigid frame bridge with high piers, the Wu Jiawan bridge is taken as an example, the finite element model of the full-scale bridge is established by using Midas/civil, the construction process is simulated by calculation.The stability of the highest pier, the stability of the longest cantilever and the stability in complete stage of the bridge under different working conditions was analyzed.The buckling load factor of bridge in service stage under different radius of curvature, different way of loading and different temperature was calculated.Types of buckling in different conditions was analyzed contrastively, the significance analysis of stability parameters was researched.The results show that wind load in different directions has little effect on stability of pier in the stage of highest pier, longitudinal wind load has more negative influence on stability than transverse wind load in the stage of longest cantilever.In the complete stage of bridge, the situation that all vehicles traveling in the lane outside of curve is more dangerous than the situation that all vehicles traveling in the lane inside of curve.