Spatial elastic stability analysis of the Zhanhe X-style arch bridge

In order to understand the lateral stabilities of Zhanhe X-style arch Bridge in the city of Pingdingshan,its spatial finite element numerical model was built by utilizing the general finite element software ANSYS.For the purpose of making a comparison with the stability of the parallel rib arch bridge,the corresponding spatial model was also created.and the spatial elastic stability calculation and analysis of the two types of the arch bridges were carried out.The results indicate that the buckling modes of X-style arch bridge give priority to the buckling mode of out of plane of arch rib,and the region of the rib without transverse bracings is the weak point of the bridge.Comparing to the parallel rib arch bridge,the traverse stability of X-style arch bridge is obviously improved,and the 1st buckling mode of arch rib changes.The analysis results can be used to determine the design plan of Zhanhe X-style arch Bridge.