火电厂厂房钢结构屋盖的设计优化  

Design Optimization of Steel Structure Roof of a Thermal Power Plant

作　　者：刘崇浩 廖湘辉 程如意 黄振威 LIU Chonghao;LIAO Xianghui;CHENGRuyi;HUANG Zhenwei(School of Machinery and Power,Three Gorges University,Yichang 443000,China)

机构地区：[1]三峡大学机械与动力学院,湖北宜昌443000

出　　处：《机械》2025年第3期37-43,共7页Machinery

摘　　要：随着大跨度钢结构屋盖的应用越来越广泛,所衍生出的钢结构屋盖的优化设计也随之兴起。为了得到更加合理和优化的结构文针对某火电厂厂房屋盖进行结构选型和优化设计。结合以往的工程经验,采用Midas/Gen有限元软件进行建模分析计算,分别对比了空间桁架屋盖、网架屋盖、张弦梁屋盖的优缺点,选择出了适用于本项目的桁架屋盖结构,并对其进行优化设计,优化后的屋盖用钢量减小了8.24%,节约了成本,并且应力比分布更加均匀,能充分发挥出杆件的力学性能。最后对优化后的屋盖进行地震反应分析,结果显示优化后的桁架屋盖结构满足抗震规范要求。With the increasingly widespread application of large-span steel roof,the optimized design of steel roof also rises.In order to get a more reasonable and optimized structure,this paper carries out the structural selection and optimization design for the building cover of a thermal power plant.Combined with previous engineering experience,Midas/Gen finite element software is used to conduct modeling analysis and calculation.By comparing the advantages and disadvantages of space truss roof,mesh roof and string beam roof respectively,we select the truss roof structure suitable for this project and optimize its design.After optimization,the amount of steel used in the roof is reduced by 8.24%.Cost saving has been achieved and the stress ratio distribution is more uniform,which can give full play to the mechanical properties of the bar.Finally,the seismic response analysis of the optimized roof is carried out.The results show that the optimized roof structure meets the seismic code requirements.

关 键 词：结构选型 MIDAS 优化设计 桁架屋盖 地震反应分析 

分 类 号：TU323[建筑科学—结构工程]