某梭形混合结构设计与分析

Design and analysis on a shuttle-shaped mixed structure

项目为钢结构外壳与混凝土内框架组成的混合结构,结构整体形状呈梭形,钢结构部分类似鱼骨。采用YJK,MIDAS/Gen软件对结构进行整体计算和弹性时程分析,采用ANSYS软件对重要节点进行有限元分析。结果表明,混合结构阻尼比应取计算与规范的较小值;整体分析应考虑楼梯的作用,楼梯对周期、阻尼比、位移及与楼梯直接相连的柱内力均有影响;通过概念设计对关键节点进行加强能够满足设计要求。

The project is a mixed structure composed of steel structure shell and inside concrete frame. The overall shape of the structure is shuttle-shaped,and steel structure part is similar to shape of fish bones. YJK and MIDAS / Gen software were used for overall structure calculation and elastic time-history analysis on the structure,and ANSYS software was adopted to conduct finite element analysis on the important joints. The results show that the damping ratio of mixed structure should adopt the smaller value of calculation value or specification value. Overall analysis should consider the role of the stairs,and the stairs have impacts on the period,damping ratio,displacement,and internal force of column attached directly to the stairs. It can meet the design requirements to strengthen the key joints through the concept design.