某看台钢桁架悬挑雨棚支座对比分析

Comparative Analysis of Steel Truss Suspended Canopy Supports in a Certain Stand

本工程为某体育场混凝土看台的钢桁架悬挑雨棚,根据《空间网格技术规程》的要求,本工程采用通用有限元分析软件Midas进行整体结构的位移及受力分析,针对混合结构的特点,给出了建模中钢桁架荷载的施加方式、阻尼比的取值、计算方法的选择等注意事项,通过建立三个不同边界约束条件的模型,对钢结构支座进行对比分析,通过对周期结果、位移结果及杆件应力结果的对比分析,得出三种不同边界类型对整体计算的影响,并对合理设置边界条件提出了建议,为后续类似案例的结构设计提供参考。

This project is a steel truss cantilever canopy for a concrete grandstand of a certain sports stadium.According to the requirements of the Space Grid Technical Regulations,the displacement and force analysis of the overall structure is carried out using the universal finite element analysis software Midas.Based on the characteristics of the mixed structure,precautions such as the application method of steel truss load,the value of damping ratio,and the selection of calculation method are given in the modeling.By establishing three models with different boundary constraint conditions,a comparative analysis is conducted on the steel structure support.Through the comparison and analysis of the periodic results,displacement results,and member stress results,the influence of three different boundary types on the overall calculation is obtained.Suggestions are made for the reasonable setting of boundary conditions,providing reference for the structural design of similar cases in the future.