北京交通大学学报2017，Vol.41Issue(4)：40-46,7.DOI:10.11860/j.issn.1673-0291.2017.04.006
基于变形协调原理的多塔斜拉桥非边塔纵向抗推刚度
Longitudinal anti-push rigidity of the non side tower for multi-tower cable-stayed bridge based on the principle of deformation coordination
摘要
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.关键词
多塔斜拉桥/非边塔/变形协调原理/抗推刚度/参数分析Key words
multi-tower cable-stayed bridge/non side tower/principle of deformation coordination/anti-push rigidity/parametric analysis分类
交通工程引用本文复制引用
陈恒大,邬晓光,姚丝思,李铸..基于变形协调原理的多塔斜拉桥非边塔纵向抗推刚度[J].北京交通大学学报,2017,41(4):40-46,7.基金项目
国家自然科学基金(51308056) （51308056）
中国电力建设股份有限公司科技项目(LQ2014-03)National Natural Science Foundation of China(51308056) （LQ2014-03）
Science and Technology Projects of Power Construction Corporation of China(LQ2014-03) （LQ2014-03）
