市政技术2023，Vol.41Issue(12)：66-71,6.DOI:10.19922/j.1009-7767.2023.12.066
悬索桥的无应力状态控制法
Stress-free State Control Method for Suspension Bridges
饶立恒 1檀永刚 2周世轩3
作者信息
- 1. 深圳市交通公用设施建设中心建设管理部,广东深圳 518000
- 2. 大连理工大学,辽宁大连 116024
- 3. 大连理工大学土木建筑设计研究院有限公司,辽宁大连 116024
- 折叠
摘要
Abstract
During the construction process,the calculation of suspension bridges exhibits large displacement non-linear characteristics,and the bridge state depends on the initial stress-free state of each component,load magni-tude and boundary constraint conditions.When the interaction between material variation and loading process over time is not considered,the stress-free state control method can be used for calculation.However,in the process of nonlinear solving,different choices of incremental steps may cause results converging to different equilibrium states.Therefore,the topological invariance condition after structural stress is introduced.The stress-free state control method is extended to the calculation of the cable after beam hoisting construction and cable after beam tensioning construction control process suitable for suspension bridges with significant nonlinearity.It is proved that the bridge state is only related to the stress-free line shape of the main beam and the stress-free length of the cable,and is in-dependent of the order of hoisting and tensioning.The operability,efficiency and high accuracy of the stress-free state control method have been verified by the actual construction control process of bridges.关键词
悬索桥/自锚式悬索桥/无应力状态控制法/施工控制/影响矩阵/成桥状态Key words
suspension bridge/self-anchored suspension bridge/stress-free state control method/construction control/impact matrix/bridge state分类
交通运输引用本文复制引用
饶立恒,檀永刚,周世轩..悬索桥的无应力状态控制法[J].市政技术,2023,41(12):66-71,6.
