青岛方兴展览厅异形网架结构设计与分析

Design and analysis on special-shaped grid structure of Fangxing Exhibition in Qingdao

青岛方兴展览厅下部为钢框架,上部为网架屋盖。采用SAP2000软件建立了三种模型进行分析:模型一上部屋盖结构单独计算;模型二考虑下部钢框架和上部屋盖结构协同作用的整体计算;模型三在模型二的基础上考虑了支座高度的整体计算。主要分析了下部结构、支座高度对上部网架的支座反力、跨中及边跨的杆件内力和节点挠度及自振特性的影响。通过计算结果对比分析,得到了网架单独模型、整体模型和考虑支座高度的整体模型的区别与联系,对类似工程设计具有借鉴意义。

Lower part of Fangxing Exhibition in Qingdao is a steel frame structure and upper part is a grid roof structure.Three models were established and analyzed by SAP2000 software. The first model included only the upper roof structure that was calculated separately. The second model considered the overall calculation of the interaction between the lower steel frame and the upper roof structure. The third model considered the overall calculation of height of support based on the second model. The effects of the participation of the substructure and the height of the support were mainly analyzed on the support force of the upper grid,the internal forces and the deflections of the middle span and side span and the natural vibration characteristics. Through the comparison and analysis of the calculation results,the difference and relation between the individual model of the grid,the overall model and the overall model considering height of support were obtained,which could be used as a reference for similar engineering designs.