某板式钢结构螺旋楼梯的选型设计与分析

Selection Design and Analysis of a Slab Steel Spiral Staircase

以实际工程为研究基础,基于有限单元法中的板壳结构理论,在SAP2000中构建精细化的三维有限元模型,通过结构的选型与分析,确定了楼梯结构的合理组成与布置,经分析结构的极限承载力及变形等情况,确定了应力及位移的极值位置,通过考虑踏步板对刚度和承载力的贡献,在一定程度上减弱了钢梁因内外弧长的不同而引起的刚度上的差异,上下端支座基于刚性连接的合理性设计,保证了楼梯真实的受力状态,为类似工程提供了一定的参考。

Based on the actual engineering,based on the theory of plate and shell structure in the finite element method,a refined threedimensional finite element model was constructed in SAP2000.Through the selection and analysis of the structure,the reasonable composition and arrangement of the staircase structure were determined.The ultimate bearing capacity and deformation of the structure determine the extreme position of stress and displacement.By considering the contribution of the tread plate to the stiffness and bearing capacity,the stiffness of the steel beam caused by the difference in inner and outer arc lengths is weakened to a certain extent.The rational design of the upper and lower end supports based on rigid connection ensures the real stress state of the stairs and provides a certain reference for similar projects.