大跨度复杂异形钢框架结构设计与承载力性能研究  

STRUCTURAL DESIGN AND LOAD-CARRYING CAPABILITY PERFORMANCE OF LARGE-SPAN SPECIAL-SHAPE STEEL FRAME STRUCTURE

作　　者：刘学春[1] 林娜[1] 腾伟[1] 张艳霞[2] 王艺蒙[1] 张爱林[1] 

机构地区：[1]北京工业大学北京市高层和大跨度预应力钢结构工程技术研究中心,北京100022 [2]北京建筑大学工程结构与新材料北京市高校工程研究中心,北京100044

出　　处：《钢结构》2015年第5期11-16,51,共7页Steel Construction

基　　金：国家自然科学基金项目(51248009)

摘　　要：对某异形框架展馆工程进行了设计研究,并取展馆中较典型的1榀框架进行实体有限元分析,系统研究了该异形框架设计荷载下的受力性能和极限荷载下的破坏机理、极限承载能力等。针对受力性能薄弱的节点部位,提出了翼缘加宽型和盖板加厚型两种加强型构造措施。研究表明:结构设计时,通过在梁端加宽翼缘或加设盖板来对梁端给予加强,可明显增加框架强度,改变框架受力性能,提高极限承载能力。此外,在设计荷载作用下框架基本处于弹性受力状态,极限荷载作用下框架可表现出足够的安全储备能力。The main design process for a pavilion project was presented in this paper, and one typical frame was chosen from this project for finite element analysis. The mechanic behavior of special-shaped steel frame under design load was investigated, as well as the failure mechanism under ultimate load, ultimate bearing capacity etc. For the weak connections, where plastic hinges were likely to form, two kinds of reinforced measures were put forward, i. e flange widening and lateral plate thickening. Result showed that in the design of the project the support region of beam end should be reinforced by widening flange and thickening lateral plate to transfer stress. Both measures could significantly improve the mechanical performance of steel frame and the ultimate bearing capacity. Furthermore ,the special-shaped steel frame structure was mostly in elastic state under design load, its bearing capacity had abundant safety reserve under the ultimate load.

关 键 词：异形钢框架 结构设计 承载能力 梁端加强 

分 类 号：TU393.3[建筑科学—结构工程]