Study on general formula of critical moment of steel beam with flexural-torsional buckling

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	Study on general formula of critical moment of steel beam with flexural-torsional buckling
	Zhou, Xuhong 1,2; Liu, Zhanke 1,2; Chen, Ming 1,3; He, Ziqi 1
刊名	Jianzhu Jiegou Xuebao/Journal of Building Structures
	2013-05-01
卷号	34 期号:5 页码:80-86
关键词	Buckling Molecular physics Shear strain Steel beams and girders Strain energy Critical moment Flexural-torsional buckling General formulas National standard Overall stabilities Simply supported Torsional strain Total potential energy
ISSN号	10006869
英文摘要	In order to study how each potential energy in total potential energy equation influences the value of coefficients in the general formula of critical moment Mcr, the general formula of Mcr and the formula of its coefficients were derived based on three typical total potential energy equations respectively, and the relationship between each potential energy and the coefficients was pointed out. Based on the series of formulas derived in this paper, the values of the coefficients for a simply supported steel beam without lateral support were calculated, and the defects of overall stability factor φb in current national standards GB 50018-2002 and GB 50017-2003 were analyzed. The conclusions show that except for nonlinear normal strain energy and nonlinear shear strain energy, the value of coefficient C1 is influenced by Saint-Venant torsional strain energy and the value of coefficient C2 is influenced by potential energy of loads. However the potential energy which influences the value of coefficient C3 is varied from different total potential energy equations. The design formula of overall stability factor φb in current national standards GB 50018-2002 and GB 50017-2003 should be in unified form and the value of coefficient C3 should also be unified.
语种	中文
出版者	Science Press
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/113446]
专题	土木工程学院企业单位划归国资委人员
作者单位	1.School of Civil Engineering and Mechanics, Lanzhou University, Lanzhou 730000, China; 2.Key Lab. of Mechanics on Disaster and Environment in Western China of the Ministry of Edu. of China, Lanzhou University, Lanzhou 730000, China; 3.School of Civil Engineering, Lanzhou University of Technology, Lanzhou 730050, China
推荐引用方式 GB/T 7714	Zhou, Xuhong,Liu, Zhanke,Chen, Ming,et al. Study on general formula of critical moment of steel beam with flexural-torsional buckling[J]. Jianzhu Jiegou Xuebao/Journal of Building Structures,2013,34(5):80-86.
APA	Zhou, Xuhong,Liu, Zhanke,Chen, Ming,&He, Ziqi.(2013).Study on general formula of critical moment of steel beam with flexural-torsional buckling.Jianzhu Jiegou Xuebao/Journal of Building Structures,34(5),80-86.
MLA	Zhou, Xuhong,et al."Study on general formula of critical moment of steel beam with flexural-torsional buckling".Jianzhu Jiegou Xuebao/Journal of Building Structures 34.5(2013):80-86.