自锚式斜拉-悬索协作体系桥合理成桥状态确定的分步算法  

Stepwise method of calculation for the rational finished state of self-anchored cable-stayed suspension bridges

作　　者：朱巍志[1] 张哲[1] 潘盛山[1] 许福友[1] 

机构地区：[1]大连理工大学,辽宁大连116023

出　　处：《土木工程学报》2010年第10期91-97,共7页China Civil Engineering Journal

基　　金：西部交通建设科技项目基金(200631882350);高等学校博士点新教师基金(20070141073)

摘　　要：对自锚式斜拉-悬索协作体系桥进行分析计算的首要问题是如何确定成桥状态时构件的空间位置,即成桥状态初始构形和缆、索的内力。根据不变形预张力和无应力索长的概念推导不变形预张力的索力不变原理。利用该原理,结合现有的一些计算方法提出自锚式斜拉-悬索协作体系桥合理成桥状态确定的分步算法。运用该方法对大连跨海大桥的设计方案进行计算。计算结果表明利用该方法能够按照要求得到该类桥梁合理的成桥状态,并且计算得到的不变形预张力结果可以作为下一步的施工阶段分析计算的基础。How to determine the spatial positions of structural components and their internal forces is a key issue in structural analysis for self-anchored cable-stayed suspension bridges.Based on the concept of the undeformed pretension and unstrained cable length,a non-deformation pretension principle on how to keep the internal force of the cable unchanged is derived.Utilizing this principle,a stepwise calculation method for the rational finished state of self-anchored cable-stayed suspension bridges is proposed.With the Dalian Gulf Bridge as an example,the results show that the presented method is effective,and the no-deformation pretension can be employed in analyzing construction phases.

关 键 词：自锚式斜拉-悬索协作体系桥 分步算法 合理成桥状态 不变形预张力 无应力索长 

分 类 号：U488.27[交通运输工程—载运工具运用工程]