Stability Analysis of Hollow Thin-Walled High Pier Curved Bridge Without Diaphragms

As the height of bridge increases, more and more high piers are designed with diaphragms to ensure their stability. However, the insertion of the diaphragms will have a significant impact on the speed and efficiency of the pier construction. For the stability problem of hollow thin-walled high piers, the numerical simulation of the model with or without diaphragms is carried out to compare and analyze the force mode, ultimate bearing coefficient and deformation characteristics of high pier of curved bridge from the perspectives of full bridge buckling analysis, high pier integral stability and high pier local stability in this paper. Studies have shown that the effect of installing concrete diaphragms on the stability of such single hollow thin-walled high piers is not obvious. If the wall thickness of the high pier meets the requirements for strength and stiffness and the theoretically calculated maximum allowable width-to-thickness ratio, the long-span continuous rigid frame curved bridge high piers may not be provided with diaphragms.