上海天文馆球幕影院复杂壳体混合结构设计

Mixed structural design of complex shell of the dome theater of Shanghai Planetarium

上海天文馆球幕影院是由钢结构球体网壳和曲面混凝土薄壳组成的混合结构。阐述了该混合结构的特点和难点,分析了结构的整体稳定性、大震作用下的塑性损伤分布、关键连接节点性能等。结果表明：连接节点的构造可靠,结构整体不会发生失稳破坏;球体网壳满足大震弹性要求,混凝土壳体满足大震不屈服要求。

The dome theater of Shanghai Planetarium is a mixed structure composed of a spherical steel reticulated shell and a curved concrete thin-shell structure. The structure characteristics and key design problems were introduced. The structural overall stability,plastic damage distribution under rare earthquake and key joint performance were analyzed. The calculation results indicate that the connection joints are reliable in structure details and no instability failure occurs in the whole structure. The spherical reticulated shells meet the elastic requirements of rare earthquake,and the concrete shells meet the requirement of not yielding under rare earthquake.