巨型网格开合屋盖静力与稳定性能研究

Research on Static and Stability Property of Retractable Reticulated Mega-structure

依据开合方式的选择原则并结合巨型网格结构的特点,提出了水平开合方式的巨型网格开合屋盖,并对结构组成、布置及开合机构系统设置等进行详细研究;分别采用整体协同和单独分析法对开合屋盖轨道的变形规律进行分析,结果表明不同分析方法的轨道变形规律基本一致.另外对开合屋盖进行了详细的特征值屈曲分析和非线性屈曲分析,发现该结构的临界荷载是设计荷载的15倍以上,表明巨型网格开合屋盖的具有很好的稳定性能力.

According to the choice principle of retractable mode and combining with the character of the reticulated mega-structure, the horizontal movement retractable reticulated mega-structure was presented. And the construction, arrangement, and mechanism of the retractable roof structure were discussed. The displacement regularity of the rail was thoroughly studyied on the conditions of the fixed roof bearing cooperatively with the movable or the fixed roof bearing the load by itself. The results indicate that the displacement regularities under the both conditions are basically identical. In addition, researches on both linear and non-linear stabilities of the retractable reticulated structure were carried out, and it is found that the critical buckling load of the structure is more than 15 times of the design load, which indicates that the stability property of the reticulated mega-structure is very excellent.