楼梯在地震中的性能表现及楼梯对于主体结构抗震性能的影响，是土木工作者必须认真对待和考虑的问题。
The performance of stairs in seism and the impact of stairwell on the main structure are necessary to be seriously researched and considered by civil engineering.
震害表明，楼梯往往先于主体结构破坏前产生种种严重破坏，影响应急使用。
The earthquake damage shows that the staircase is often before the main structure damage to have all sorts of serious destructions, affecting emergency use.
对板式钢结构旋转楼梯的有限元计算进行了全面的分析，并对其与主体结构的连接节点进行了设计。
There are four key points of plate spiral stair design, and they are model building, inner force calculation, overall stability analysis and joints design between the stair and the main structure.
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