retractable structures

基本解释

Planar multi-angulated beams are commonly used in retractable structures.
平面折梁单元是可开启结构中的常用单元类型。
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Retractable structures have been widely adopted in large-sized palaestra and multipurpose buildings.
开合结构在大型体育馆、多用途体育场得到广泛应用。
These typical realized retractable roof buildings provide us with great references to further research. The research of retractable roof structures is only at the beginning in China.
目前我国对开合结构的研究还处于起步阶段，国内已建成的数座小跨度开合屋盖建筑结构形式和开合机理较为简单，相应的有参考价值的工程资料也很有限。