摘要
预应力双层索比单层索有更好的结构刚度和形状稳定性,可用于各种跨度的屋盖结构中.本文采用能量变分原理对双层索进行静力分析,得到了在均布荷载、三角形荷载和对称三角形荷载作用下的挠度近似公式,并与采用有限元法分析的结果进行比较.结果表明,本文给出的挠度计算公式具有较高的精度,可供工程应用参考.
The pre-stressed double layer suspended cable systems have better structural rigidity and the shape stability than the single suspended cable system and can be used in roofs with different spans. Static analysis to the pre-stressed double layer suspended cable structure is analyzed by energy variational principle and finite element method. The approximate deflection formulas under distributed load, triangle load and symmetrical triangle load are obtained respectively. The results of two methods are compared.Numerical results show that the deflection formulas for pre-stressed double suspended cable given by this paper are of high accuracy and can be used as a reference of practical application.
出处
《空间结构》
CSCD
北大核心
2007年第1期29-31,36,共4页
Spatial Structures
关键词
双层索
预应力
静力分析
能量变分原理
有限元分析
double layer suspended cable system
pre-stressing
static analysis
energy variational principle
finite element analysis
