变截面斜腿刚架平面内整体稳定性能研究
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(1 青岛市建筑设计研究院股份有限公司，青岛 266003； 2 哈尔滨工业大学，哈尔滨 150090)［摘要］利用ANSYS软件，考虑几何非线性和弹性，对变截面斜腿刚架进行了大量的荷载位移全过程分析。分析中考虑了柱倾斜角度、柱高跨比、梁的起拱坡度和刚架柱小头截面惯性矩与大头截面惯性矩之比等四个参数，以及梁上均布荷载和集中力两种加载形式，最后给出了斜腿刚架的各种失稳模式和相应刚架柱的计算长度系数，供设计时参考。［关键词］变截面斜腿刚架；整体稳定性；变截面构件；计算长度系数；钢结构In-plane global stability of the tilted column rigid frame with tapered membersWang Zhongli1, Zhang Yaochun2, Zhang Wenyuan2(1 Qingdao Architectural Design & Research Institute Co., Ltd., Qingdao 266003, China; 2 School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China)Abstract:Using the ANSYS program and considering elastically and geometrically nonlinear behavior, the load-displacement curves for lots of tilted column rigid frames with tapered members are obtained. In the course of analysis, four parameters including column tilting degree, ratio of frame height to its span, gradient of beams, and ratio of smaller section inertial moment to the bigger of columns are considered, at the same time two load forms of uniformly distributed loads or concentrated loads are considered. Finally different buckling modes of tilted column rigid frames and corresponding effective length factors are proposed, which may be very useful in design.Keywords:tilted column rigid frame; tapered members; global stability; effective length factor; steel structure作者简介：王忠丽，女，硕士，Email:zhl-wang@126.com。参考文献［1］BAPTISA A M, MUZEAU J P. Design of tapered compression members according to Eurocode 3［J］. J Construct Steel Res, 1998, 46:146-148.［2］STRITAWAK K, NICHOLAS S T. Elastic stability of tapered I-beams［J］. Journal of the Structural Division, 1972,98(3):713-728.［3］RONAGH H R, BRADFORD M A, ATTARD M M. Nonlinear analysis of variable cross-section PartⅠ: Theory［J］. Computer and Structures, 2000,77:285-299.［4］李进军. 变截面门式钢刚架非线性分析及整体可靠度设计理论研究［D］. 上海：同济大学, 2001.［5］王文明, 郭彦林, 赵熙元. 变截面门式钢刚架结构体系平面内稳定研究［J］. 建筑结构学报, 1999,20(4):25-32.［6］谭建国. 使用ANSYS 6.0进行有限元分析［M］. 北京：北京大学出版社, 2002.［7］王忠丽. 实腹式斜腿刚架平面内整体稳定性能研究［D］. 哈尔滨：哈尔滨工业大学, 2003.
［8］JOHNSTON B G. Guide to stability design criteria for metal structures［M］. A Wiley Interscience Pubication, 1976:330-356.
