摘要
本文在简单回顾网壳结构现状后 ,提出了一种预应力加肋网壳结构 ,并对它进行了动力性能研究。文中采用反应谱法和时程分析法对该类结构进行了动内力的计算 ,通过计算分析 ,得到该类结构应采用时程法计算动内力的结论。此外 ,还研究了矢跨比、质量对结构动内力的影响 ;同时 ,通过对结构中某些构件动内力的时程曲线的研究 ,指出索中施加预应力的必要性。本文结论可供实际工程设计时借鉴。
On the basis of a brief review of reticulated dome structures, a type of prestressed ribbed reticulated dome structure is proposed in this paper. The dynamic properties of this structure are then investigated by using the spectrum and the time-history methods. It is found that the time-history method should be used in the analysis of such structure. The effects of rise-to-span ratios and mass on dynamic forces are also studied. The force time-history curves of some members are plotted and it is shown that the prestressed cable is necessary for this type of structure. The conclusions from this paper can be used for reference in the design of practical engineering.
出处
《空间结构》
CSCD
2002年第3期22-28,共7页
Spatial Structures
基金
国家自然科学基金资助项目 (5 98780 4 9)
关键词
预应力
加肋网壳结构
动力性能
动力破坏
ribbed reticulated dome
prestress
dynamic properties
parametric study
dynamic collapse
