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Distortional Buckling of Cold-formed Thin-walled Lipped Beams

Author: ChengZuo
Tutor: YaoZuo
School: Zhejiang University
Course: Structural Engineering
Keywords: Cold-formed steel Distortional buckling Flexural members Buckling load simplify the calculation Reinforcement measures
CLC: TU392.1
Type: Master's thesis
Year: 2010
Downloads: 101
Quote: 2
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Abstract


Cold-formed steel for its light weight and good cross-section characteristics , a high degree of industrial production , easy installation , etc. , are widely used in various industrial and civil construction . As one of the control mode of the carrying capacity of cold-formed steel buckling , distortional buckling attention gradually . Curling C -shaped steel for cold-formed thin-walled flexural distortion -depth study. First moment around the strong axis case, the Galerkin webs under bending stress rotational stiffness constraint formula parametric analysis combined with existing model based on the generalized beam theory , deduced by bending elastic distortion buckling load simplified calculation method . By comparison with the existing theory , prove to be obtained with a high accuracy . Next, using the finite element software ABAQUS curling C-shaped steel cold-formed thin-walled elastic and elastic-plastic analysis . Inclined simple edge component elastic analysis , detailed analysis of the parameters , given the length of the member and curling angle on the buckling load factor formula , by the parameters of this amendment expanded the scope of the use of the simplified formula . The elastic-plastic analysis of the main research elastoplastic flexural members distortion buckling load and ultimate capacity to analyze the impact of the initial defect the distortional buckling ultimate bearing capacity . And the distortional buckling control of quantitative analysis of the rod , partitions, diagonals and other reinforcement measures . Changes in reinforcement spacing elastic finite element analysis , through parameter analysis of the elastic buckling load lift coefficient formula proposed three reinforcing manner . Subsequent reinforcement effect elastoplastic analysis to further verify the effectiveness of reinforcing way . The combination of the amount of steel analysis , given the best reinforcement . Promotion to the Z -shaped steel distortion of the C-shaped steel buckling load formula is derived to calculate the need to modify the relevant parameters , the Z -shaped steel flexural distortion buckling loads simplified formula . Application ABAQUS member length and curling angle on the buckling load . Contrast , found that both the buckling load is very close to the same cross-sectional size of the C -shaped steel and Z -shaped steel .

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CLC: > Industrial Technology > Building Science > Building structure > Metal structures > Various types of steel > Steel structure
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