摘要
建立了一种三维斜拉桥的有限单元模型，并将其用于ＫａｐＳｈｕｉＭｕｎ斜拉桥动态特性分析。同时考虑了各种结构参数（结构质量的分布和偏心，结构刚度，索单元划分，索自重垂度，边界条件等）对斜拉桥自振特性的影响。数值计算结果与脉动试验结果较吻合。
The dynamic characteristics of cable stayed bridges have received great attention in recent years as this type of bridge becomes even more popular.This paper presents the dynamic analysis of the Kap Shui Mun(KSM) Bridge in Hong Kong by using finite element code ABAQUS.A detailed description of the development of finite element model for the analysis and the effect of structure parameters on the dynamic behavior,such as structure mass,eccentricity between the centroid and the shear center,cable vibration,cable sag and support conditions,are given.The modal frequencies and mode shapes computed by using this three dimensional finite element model of bridge are compared with those measured from ambient vibration.For most frequencies,the predictions show good agreement with test results.It shows that this kind of finite element model is capable of capturing much of the complex dynamic behavior of cable stayed bridges.
出处
《振动工程学报》
EI
CSCD
1998年第1期121-126,共6页
Journal of Vibration Engineering
关键词
斜拉桥
动力特性
有限元模型
三维
动力分析
cable stayed bridge
dynamic characteristic
finite element model
