變截面斜腿剛架平面內(nèi)整體穩(wěn)定性能研究
王忠麗1，張耀春2，張文元2
- 摘 要
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(1 青島市建筑設(shè)計(jì)研究院股份有限公司，青島 266003； 2 哈爾濱工業(yè)大學(xué)，哈爾濱 150090)［摘要］利用ANSYS軟件，考慮幾何非線性和彈性，對變截面斜腿剛架進(jìn)行了大量的荷載位移全過程分析。分析中考慮了柱傾斜角度、柱高跨比、梁的起拱坡度和剛架柱小頭截面慣性矩與大頭截面慣性矩之比等四個(gè)參數(shù)，以及梁上均布荷載和集中力兩種加載形式，最后給出了斜腿剛架的各種失穩(wěn)模式和相應(yīng)剛架柱的計(jì)算長度系數(shù)，供設(shè)計(jì)時(shí)參考。［關(guān)鍵詞］變截面斜腿剛架；整體穩(wěn)定性；變截面構(gòu)件；計(jì)算長度系數(shù)；鋼結(jié)構(gòu)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作者簡介：王忠麗，女，碩士，Email:zhl-wang@126.com。參考文獻(xiàn)［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］李進(jìn)軍. 變截面門式鋼剛架非線性分析及整體可靠度設(shè)計(jì)理論研究［D］. 上海：同濟(jì)大學(xué), 2001.［5］王文明, 郭彥林, 趙熙元. 變截面門式鋼剛架結(jié)構(gòu)體系平面內(nèi)穩(wěn)定研究［J］. 建筑結(jié)構(gòu)學(xué)報(bào), 1999,20(4):25-32.［6］譚建國. 使用ANSYS 6.0進(jìn)行有限元分析［M］. 北京：北京大學(xué)出版社, 2002.［7］王忠麗. 實(shí)腹式斜腿剛架平面內(nèi)整體穩(wěn)定性能研究［D］. 哈爾濱：哈爾濱工業(yè)大學(xué), 2003.
［8］JOHNSTON B G. Guide to stability design criteria for metal structures［M］. A Wiley Interscience Pubication, 1976:330-356.
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