摘要
天津市宝坻体育馆钢屋盖采用了扁平椭球壳弦支穹顶结构体系,对比双层网壳方案,体现了弦支穹顶结构的优势.分析矢跨比对结构静力及自振特性的影响,并基于分析结果对矢跨比进行优化;以上部结构内力分布最优作为目标变量,利用ANSYS软件优化模块对结构初始预应力分布进行优化分析,最终确定了屋盖结构方案.对恒荷载、活荷载、风荷载、温度作用以及地震作用等工况进行组合,并分别进行了结构内力、变形以及整体稳定性分析设计,计算结果表明结构安全可靠.
The Baodi Gymnasium in Tianjin is a shallow ellipsoidal suspend-dome shell. Compared with the design of double-layer shell, the advantage of suspend-dome is obvious. The influence of rise-span ratio on static and free vibration characteristics is analyzed. Meanwhile the rise-span ratio is adjusted according to the result. Taken the best internal force distribution as the target variables, the optimizing module in ANSYS is used to adjust the prestress distribution and the roof structure design is selected. The dead load, live load, wind load, temperature effect and earthquake effect are combined to get the internal force and deformation of structure as well as the overall stability to ensure the safety and reliability of the structure.
出处
《空间结构》
CSCD
北大核心
2015年第1期47-53,共7页
Spatial Structures
基金
天津大学自主创新基金项目(90060307001)
关键词
弦支穹顶
双层网壳
扁平椭球壳
稳定性
矢跨比
suspend-dome
double-layer shell
shallow ellipsoidal shell
stability
rise-span ratio
