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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.
Tianjin Baodi Gymnasium steel roof adopts a flat ellipsoidal shell chord dome structure system, compared with the double-decker reticulated shell scheme, which shows the advantages of the chord support dome structure.Analysis of the influence of the sag ratio on the static and natural vibration characteristics of the structure, And optimize the aspect ratio based on the analysis results. Optimizing the internal force distribution of the superstructure as the target variable, using the ANSYS software optimization module to optimize the analysis of the structure of the initial prestressing force, and ultimately determine the roof structure program.For the constant load, live Load, wind load, temperature and earthquake action are combined. The internal forces, deformations and the overall stability analysis and design are respectively carried out. The calculation results show that the structure is safe and reliable.