铁道科学与工程学报2017，Vol.14Issue(2)：283-289,7.
基于变形协调原理的多塔斜拉桥边塔纵向抗推刚度
Longitudinal restraint stiffness of the side tower for multi-tower cable-stayed bridge based on the principle of deformation coordination
摘要
Abstract
In order to explore the stiffness characteristic of multi-tower cable-stayed bridge, this paper introduces an idea to multi-tower cable-stayed bridge with the cable constraint the tower as spring stiffness. The three tower cable-stayed bridge was taken as research object, which is the simplest type of multi-tower cable-stayed bridge. Based on the principle of deformation coordination, longitudinal restraint stiffness of the side tower for multi-tower cable-stayed bridge was solved out, and a series of estimating formulae are provided and calculating outcomes are compared with that of a finite element model. Besides the influence of main structure parameters for longitudinal restraint stiffness of the side tower were also analyzed. The results show that on the side tower with uniformly distributed load, the errors between the side tower deformation formula in this paper and finite element are within 7.8%. The main reason of the result of the formula in this paper bigger than finite element model is the formula does not consider the sag effect of the cable. The horizontal force caused by the uniformly distributed load with side tower has not full effect at the side tower, and a part of the consumption is in the sag effect of the cable. The presented theoretical can meet the requirements of the conceptual design, and it is suitable for the stiffness requirements of multi-tower cable-stayed bridge.关键词
多塔斜拉桥/边塔/变形协调/纵向抗推刚度/参数分析/公式推导Key words
multi-tower cable-stayed bridge/the side tower/the principle of deformation coordination/longitudinal restraint stiffness/parametric analysis/formula derivation分类
交通工程引用本文复制引用
陈恒大,邬晓光,姚丝思,贺攀,李铸..基于变形协调原理的多塔斜拉桥边塔纵向抗推刚度[J].铁道科学与工程学报,2017,14(2):283-289,7.基金项目
国家自然科学基金资助项目(51308056) （51308056）
中国电力建设股份有限公司科技专项资金项目(2014-38) （2014-38）
西部交通建设科技计划项目(201493212002) （201493212002）
