摘要
本文通过计算比较,阐述了悬索桥成桥线型的精确计算方法及两种近似计算方法的误差;介绍了悬索桥无应力长度、索鞍预偏量、索夹安装位置及各种施工工况下的主缆线型、索塔位移及内力等问题的分析方法.所有计算均采用以满足力平衡条件及变形相容条件为基础的数值分析方法,比非线性有限元法具有更高的精度,并能方便地处理局部结构(如鞍座圆弧段)的影响.
This paper introduces an exact method for calculating the cable curve of suspension bridge. Compared with the results of two approximate methods, the-errors of these methods are discussed. Calculation methods for the following parameters are presented. the unstressed length of cable, the pre-dis-placement of saddle, the fixed position for erecting cable band, the cable curve in different construction stages, the displacement and internal forces of tower, and so on. In this paper, numerical analysis method based on the condition of force equilibrium and condition of deformation compatibility is applied, the precision of which is higher than the nonlinear finit element method, and can conveniently deal with the effect of the local structure ( for example, the circular are sections of tower saddles ) .
出处
《土木工程学报》
EI
CSCD
北大核心
1996年第2期3-9,共7页
China Civil Engineering Journal
