排架结构体系中格构式柱间支撑的有限元设计  

Finite element design of lattice-type column support in bent frame structure system

作　　者：谢胜杰 金海龙 XIE Shengjie;JIN Hailong(BGRIMM Technology Group,Beijing 100160,China;Beijing MIDAS Information Technology Co.,Ltd.,Beijing 100160,China)

机构地区：[1]矿冶科技集团有限公司,北京100160 [2]北京迈达斯技术有限公司,北京100160

出　　处：《矿冶》2023年第6期139-146,共8页Mining And Metallurgy

摘　　要：为了探讨格构式柱间支撑在排架结构体系中的作用,以南非某冶炼厂房支撑改造加固为背景,选用MIDAS/Gen软件,针对柱间支撑布置,建立两个排架结构体系中的格构式柱间支撑模型并进行分析。结果表明,这两个模型中,排架结构体系在吊车+制动荷载作用下的排架柱内力、位移以及排架柱底反力差异显著。通过对格构式柱间支撑截面进行理论分析,支撑建模方法不同,其平面外的刚度在排架结构单元横向刚度集成中的贡献不同,由此导致排架柱受力性能的差异。在排架结构体系工业厂房的设计、改造、加固过程中,尤其在矿山冶金厂房中,吊车工作级别高、吨位大、或者地震设防烈度高、风荷载大的情况下,排架结构单元所受到的水平作用大,变形指标控制成为设计的主控项目。格构式柱间支撑的有限元设计,采用了真实柱间支撑杆件模型,排架结构体系厂房的变形指标、受力性能明显改善,是一种高效、精确、实用的设计方法。In order to explore the role of trellized intercolumn bracing in the bent structure system,based on the reinforcement of a smelting plant in South Africa,MIDAS/Gen software was used to establish and analyze the trellized intercolumn bracing models in two rack structure systems.The analysis results show that the internal force,displacement and bottom reaction of the column are significantly different in the two models under the action of crane+brake load.Through the theoretical analysis of the support section between the lattice columns,it is found that the contribution of the out-of-plane stiffness to the lateral stiffness integration of the structural elements is different due to the different support modeling methods,which leads to the difference in the mechanical performance of the columns.In the process of the design,transformation and reinforcement of the industrial plant of the bent structure system,especially in the metallurgical plant of the mine,the crane work level is high,the tonnage is large,or the seismic fortification intensity is high,the wind load is large,the bent structure unit is subject to the horizontal effect,and the deformation index control becomes the main control project of the design.The finite element design of the lattice intercolumn support adopts the real intercolumn support model,and the deformation index and mechanical performance of the bent structure system are obviously improved,which is an efficient,accurate and practical design method.

关 键 词：排架结构 建模方法 格构式柱间支撑 有限元 

分 类 号：TU476[建筑科学—结构工程]