梯板宽度对钢筋混凝土螺旋楼梯受力性能的影响分析

The Influence Analysis of the Stair Width on the Structural Behavior of Reinforced Concrete Plate Spiral Stairs

钢筋混凝土板式螺旋楼梯作为三维空间板壳结构受力较为复杂,传统设计中往往将其简化为沿中轴线螺旋上升的空间曲梁来计算,忽略板宽对结构整体受力的影响,其计算结果与楼梯的实际受力有一定的偏差。文章结合工程实例分析了不同板宽的钢筋混凝土螺旋楼梯6个内力的变化,进而给出楼梯板的宽度对螺旋楼梯内力分布的影响。

As a three dimensional spatial plate and shell structure, reinforced concrete plate spiral stairs has complicated mechanical behaviors. In the traditional design and calculation, we often ignore the influence of the plate width and simplify it as a three dimensional spatial curved beam which rises along the central axis,this would cause some deviation between the calculated results and the actual force of spiral stairs. Combining with engineering examples, this paper analyzed the change of six internal forces caused by different plate widths, to give the distribution of the plate width on the internal forces of the spiral stairs.