高层屋顶钢结构构架的方案设计及探讨  

Scheme design and discussion of high-rise roof steel structure frame

作　　者：高晗 宋鸿誉 朱宏程 GAO Han;SONG Hongyu;ZHU Hongcheng(Tus-Design Group Co.,Ltd.,Suzhou 215021,China)

机构地区：[1]启迪设计集团股份有限公司,苏州215021

出　　处：《建筑结构》2022年第7期60-64,50,共6页Building Structure

摘　　要：基于苏州某高层项目的屋顶钢结构构架的结构分析,提出了悬臂三角形空间桁架结构、优化悬臂三角形空间桁架结构和竖向空间网架结构三种结构方案。采用有限元软件SAP2000对三种结构进行建模计算。根据计算结果,讨论不同方案中的结构传力路径,对比了杆件应力、结构变形和动力特性等力学性能和用钢量指标,最终选择了优化悬臂三角形空间桁架结构。研究结果表明:在结构布置合理的前提下,空间桁架结构和空间网架结构均具有良好的力学性能;优化悬臂三角形空间桁架结构通过减小柱跨、优化截面、增设水平桁架和柱间支撑,能够有效改善传力路径,加强构件之间的连接效率,显著提升结构力学性能;在各指标均满足要求的前提下,构件截面利用率更高,更为经济。Based on the structural analysis of the roof steel frame of a high-rise project in Suzhou,three structural schemes were proposed,namely,the cantilevered triangular space truss structure,the optimized cantilevered triangular space truss structure and the vertical space grid structure.The finite element software SAP2000 was used for modeling and calculation of three structures.According to the calculation results,the structural force transmission paths in different schemes were discussed,and the mechanical properties such as the stress of the elements,structural deformation and dynamic characteristics,as well as the steel consumption indicators were compared.Finally,the optimized cantilevered triangular space truss structure was selected.The research results show that under the premise of reasonable structural arrangement,both the space truss structure and the space grid structure have good mechanical properties.The optimized cantilevered triangular space truss structure can effectively improve the force transmission path,strengthen the connection efficiency between elements,significantly improve the mechanical properties of the structure,by reducing the column span,optimizing the section,adding horizontal trusses and inter-column supports;and on the premise that all the indicators meet the requirements,the utilization rate of the element section is higher and more economical.

关 键 词：钢结构构架 空间网架结构 空间桁架结构 结构优化与对比 

分 类 号：TU391[建筑科学—结构工程]