成都体育学院体育场罩棚结构设计与关键节点分析

Structural Design and Analysis of Key Joints of the Stadium Canopy of Chengdu Sport University

为了实现成都体育学院体育场罩棚屋面环向不连续的台阶状造型,同时保证结构连续性,提出了一种上弦组合截面管桁架。通过自编程序赋予Grasshopper生成的几何模型截面属性,并将模型接入SAP 2000,对罩棚的模态、应力、变形、屈曲情况进行计算分析,采用ABAQUS对关键节点进行有限元分析。结果表明:采用上弦组合截面管桁架的罩棚结构布置合理,传力明确,整体性较好,节点设计安全可靠,能完美呈现建筑台阶状造型,可为类似结构设计提供参考。

In order to achieve the circumferential discontinuous stepped shaped of the roof canopy of the Chengdu Sport University Stadium,while ensuring the continuity of the structure,a pipe truss with built-up top chord section was proposed.The section properties were assigned to the geometric model generated by using a self-developed program Grasshopper,conducting modal,stress,deformation,and buckling analysis of the canopy in SAP 2000,and performing finite element analysis on the key joints by using ABAQUS.The analysis results showed that the arrangement of the canopy structure adopting pipe truss with built-up top chord section was reasonable;the force transmission was clear;the overall integrity was good;the joint design was safe and reliable,and it could perfectly present the architectural stepped shape,providing a reference for similar structural designs.