Longitudinal anti-push rigidity of the non side tower for multi-tower cable-stayed bridge based on the principle of deformation coordination
CHEN Hengda
WU Xiaoguang
YAO Sisi
LI Zhu
Abstract：In order to explore the stiffness characteristics of multi-tower cable-stayed bridges,the constraint to bridge towers caused by cables is compared to spring stiffness.We take the three-tower cable-stayed bridge as research object,which is the most typical type of multi-tower cablestayed bridges.Firstly,the longitudinal anti-push rigidity of the non side tower of the three-tower cable-stayed bridge is solved based on the principle of deformation coordination.Secondly,the effectiveness of the derived formulas is verified by a calculation example.Finally,the influences of main parameters of the bridge structure on longitudinal anti-push rigidity of the left span of non side tower are analyzed.The results show that when imposing uniformly distributed load on the non side tower,the errors between the deviation of non side tower roof solved by the side tower deformation formulas derived in this paper and the finite element solutions obtained from a previous study are within 6.82％.And it is illustrated that the proposed formulas is suitable for calculating the stiffness characteristics of multi-tower cable-stayed bridges,and can meet the requirements of the conceptual design.Meanwhile,the longitudinal anti-push rigidity of the non side tower for multi-tower cable-stayed bridges is related to tower stiffness,girder rigidity,angle between cable and girder,cable line stiffness and cable anchorage spacing of tower.
Keywords：multi-tower cable-stayed bridgenon side towerprinciple of deformation coordinationanti-push rigidityparametric analysis
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 40-46 )