山形门式刚架的整体稳定分析  

The Global Stability Analysis of Gable Portal Frame

作　　者：王文峰[1] 王海忠[1] 

机构地区：[1]北京工业大学建筑工程学院,北京100022

出　　处：《工程建设与设计》2006年第2期12-15,共4页Construction & Design for Engineering

摘　　要：应用ANSYS程序,在竖向均布荷载作用下,对不同柱高、跨度和坡度的柱脚铰接的山形门式刚架进行了整体稳定分析。分析发现:高跨比是影响门式刚架稳定的主要因素,在高跨比小于1/5时,不发生传统理论所认为的有侧移失稳,而是以无侧移失稳为主;应当充分考虑斜梁内轴力、弯矩以及斜梁坡度的影响,宜采用整体分析的方法对门式刚架进行分析和计算。The ANSYS Program is used to analysis the global stability of the hinged gable frames with different column heights, spans and slopes under the vertical uniform loading. It is indicated that the height-span ratio is the main affective factor to the stability of portal frame, when the height-span ratio is less than 1：5, the buckling style it is not the traditional theory deemed of＇ sway＇, but the ＇ non-sway＇ style. The analysis also shows that the affective of axial force, moment and slope of beam should be taken. When analysis and account the portal frames had better use the overall response analysis.

关 键 词：门式刚架 整体稳定 计算长度系数 跃越失稳 

分 类 号：TU328[建筑科学—结构工程] TU311.2