DIRECT STRENGTH METHOD OF ULTIMATE LOAD-CARRYING CAPACITY OF WELDED BOX-SECTION COLUMNS SUBJECTED TO LOCAL BUCKLING

Guo Yanlin; Liu Tao

doi:10.13204/j.gyjz200909008

Volume 39 Issue 9

Dec. 2014

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Guo Yanlin, Liu Tao. DIRECT STRENGTH METHOD OF ULTIMATE LOAD-CARRYING CAPACITY OF WELDED BOX-SECTION COLUMNS SUBJECTED TO LOCAL BUCKLING[J]. INDUSTRIAL CONSTRUCTION, 2009, 39(9): 41-48. doi: 10.13204/j.gyjz200909008

Citation:

Guo Yanlin, Liu Tao. DIRECT STRENGTH METHOD OF ULTIMATE LOAD-CARRYING CAPACITY OF WELDED BOX-SECTION COLUMNS SUBJECTED TO LOCAL BUCKLING[J]. INDUSTRIAL CONSTRUCTION, 2009, 39(9): 41-48. doi: 10.13204/j.gyjz200909008

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DIRECT STRENGTH METHOD OF ULTIMATE LOAD-CARRYING CAPACITY OF WELDED BOX-SECTION COLUMNS SUBJECTED TO LOCAL BUCKLING

doi: 10.13204/j.gyjz200909008

Guo Yanlin,
Liu Tao

1.
Department of Civil Engineering,Tsinghua University,Beijing 100084,China

Received Date: 2009-04-20
Publish Date: 2009-09-20

Abstract

Abstract

Box-section columns are used widely for steel frame structures. The effective width concept employed by the current Chinese code for design of steel structure is not accurate enough for predicting their ultimate load-carrying capacity where the columns are subject to plate local buckling.This paper presents a direct strength method for accurately predicting the ultimate strength of locally buckled box-section columns.An accurate shell element is used in this study to not only simulate the local buckling exactly,but also incorporate the large displacement and the elastic-plastic material in the analysis.Numbers of numerical examples were obtained and they reveal the influences of plate is width to thickness ratio,section aspect ratio and member slenderness ratio on the ultimate strength of the hollow-section members subjected to plate local buckling.With those numerical results,three simplified design formulas are respectively proposed to estimate the ultimate strength of the hollow section columns that are subjected to centrally axial load,the pure moments and the combination between them,respectively.They will be helpful in the future modification of Chinese code for design of steel structure,and the design of hollow section columns as well.
- box-section column,
- ultimate load-carrying capacity,
- design formula

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References(11)

References

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