COMPARISON AND ANALYSIS OF LIPPED CHANNEL FLEXURAL MEMBERS' CAPACITY CALCULATED BY SPECIFICATION NAS 2004 AND GB 50018-2002

Jiang Lu; He Baokang; Ma Rongkui; Yang Songling

doi:10.13204/j.gyjz200706023

Volume 37 Issue 6

Dec. 2014

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Article Navigation > INDUSTRIAL CONSTRUCTION > 2007 > 37(6): 91-94

Liu Hua, . TECHNICAL COMPARISON AND ECONOMIC ANALYSIS OF BUILDING STRENGTHENING[J]. INDUSTRIAL CONSTRUCTION, 2007, 37(4): 88-90. doi: 10.13204/j.gyjz200704024

Citation:

Jiang Lu, He Baokang, Ma Rongkui, Yang Songling. COMPARISON AND ANALYSIS OF LIPPED CHANNEL FLEXURAL MEMBERS' CAPACITY CALCULATED BY SPECIFICATION NAS 2004 AND GB 50018-2002[J]. INDUSTRIAL CONSTRUCTION, 2007, 37(6): 91-94. doi: 10.13204/j.gyjz200706023

Liu Hua, . TECHNICAL COMPARISON AND ECONOMIC ANALYSIS OF BUILDING STRENGTHENING[J]. INDUSTRIAL CONSTRUCTION, 2007, 37(4): 88-90. doi: 10.13204/j.gyjz200704024

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COMPARISON AND ANALYSIS OF LIPPED CHANNEL FLEXURAL MEMBERS' CAPACITY CALCULATED BY SPECIFICATION NAS 2004 AND GB 50018-2002

doi: 10.13204/j.gyjz200706023

1.
School of Civil Engineering,Xi'an University of Architecture and Technology,Xi'an 710055

Received Date: 2006-12-20
Publish Date: 2007-06-20

Abstract

Abstract

A separate check on distortional buckling of cold-formed steel members exists in Direct Strength Design Method(DSM) newly accepted by North American Specification NAS 2004.But no specific design rules for it in Technical Code for Cold-Formed Thin-Walled Steel Structure(GB 50018-2002).A summary of distortional buckling behavior is presented.The calculated method of distortional buckling members is introduced and analyzed.Based on the critical elastic distortional buckling stress calculated by simplified analytical model,the bearing capacities of lipped channel flexural members in appendix of GB 50018-2002 are calculated by DSM;and the calculated results show that the bearing capacity of some lipped channel flexural members is governed by distortional buckling.According to the comparisons of calculated results by DSM with results by GB 50018-2002,the conclusions can be drawn that provisions in GB 50018-2002 are safe but too conservative.So a design suggestion that increases the buckling coefficient of flange to 3.0 is proposed.
- direct strength method,
- distortional buckling,
- lipped channel section,
- calculation of bearing capacity

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References(8)

References

[2] Schafer B,Pekoz T.Laterally Braced Cold Formed Steel Flexural Members with Edge Stiffened Elements.Journal of Structural Engineering,1999,125(2):118-127

Hancock G J,Thomas M Murray,Duane S Ellifritt,et al.Cold Formed Steel Structures to the AISI Specification.New York:Marcel Dekker,2001

[3] NAS 2004.Design of Cold Formed Steel Structural Members Using the Direct Strength Method.Appendix 1 of the NAS2004

[4] GB 50018-2002 冷弯薄壁型钢结构技术规范

[5] 柳胜华,何保康.均匀受压下卷边槽形截面的畸变屈曲性能分析.工业建筑,2004,34(增刊):224-227

[6] Lau W,Hancock G J.Distortional Buckling Formula for Channel Columns.Journal of Structural Engineering,1987,113(5):1 063-1 067

[7] Schafer B W.Elastic Buckling Analysis of Thin Walled Members by Finite Strip Analysis.CUFSM,2004

[8] 陈绍蕃.卷边槽钢的局部相关屈曲和畸变屈曲.建筑结构学报,2002,23 (1):374-381

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