Study on distortional buckling performance of cold-formed thin-walled steel flexural Members with stiffeners in the flange |
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| Affiliation: | 1. School of Civil Engineering and Architecture, Southwest Petroleum University, Chengdu 610500, China;2. CO., Ltd of Huashi Green Homeland Building Materials, Sichuan 610081, China;1. Department of Civil and Environmental Engineering, Virginia Tech, 200 Patton Hall, Blacksburg, VA 24061, USA;2. Department of Civil and Environmental Engineering, Virginia Tech, 102-C Patton Hall, Blacksburg, VA 24061, USA;1. College of Civil Engineering, Chongqing University, Chongqing 400045, China;2. Key Laboratory of Mechanics on Disaster and Environment in Western China of the Ministry of Education, Lanzhou University, Lanzhou 730000, China;3. School of Civil Engineering, Lanzhou University of Technology, Lanzhou 730000, China |
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| Abstract: | This paper presents a finite strip program CUFSM used to calculate and analyze the elastic distortional buckling of cold-formed thin-walled steel flexural members with stiffeners in the flange, which has different sectional geometric parameters. According to the classical buckling stress formula, the distortional buckling coefficient of the flange can be calculated so as to analyze the influence of changed sectional geometric parameters on it. On this basis, this study provides a simplified formula of distortional buckling stress to calculate 40 members with different sections which are selected from the Technical Code of Cold-Formed Thin-Wall Steel Structures of China but not contained in this paper. Compared with the analysis results of CUFSM, it shows that the two simplified formulas have quite high accuracy and wide applicability for general members provided by the specification. So it is suggested that they can be used for engineering design and standard revision. |
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| Keywords: | Cold-formed channel Stiffener in the flange Finite strip method Elastic distortional buckling stress |
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