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Experimental and finite element analysis research on I-beam under web crippling

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Abstract

To research web crippling property of I-beam under concentrated load, 48 I-beam with different boundary conditions, loading conditions, bearing lengths and section heights were tested. The experimental scheme, failure modes, concentrated load–general vertical deformation and equivalent strain distribution curves were presented in the paper. The effects of boundary condition, loading condition, bearing length and section height on web crippling ultimate capacity and ductility of I-beam were also studied. Results of these tests show that as bearing length increases, web crippling ultimate capacity of I-beam increase significantly. When bearing length was 50 and 100 mm, web crippling ultimate capacity of I-beam with web slenderness = 17.5 reached its peak; when the bearing length was 150 mm, web crippling ultimate capacity of I-beam with web slenderness = 22.5 reached its peak. The middle web entered plasticity and formed plastic hinge zone in the ultimate limit state. The web crippling ultimate capacity of I-beam with bearing length = 50 mm in interior one flange condition, interior two flanges condition, end one flange and end two flanges condition decreased progressively. Finite element analysis could simulate experimental failure mode and web crippling ultimate capacity. The simple calculation method of web crippling ultimate capacity put forward in the paper can accurately predict experimental value.

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Abbreviations

EOF:

End-one-flange

IOF:

Interior-one-flange

ETF:

End-two-flange

ITF:

Interior-two-flange

R w,ul :

Experimental web crippling ultimate capacity

R w,ulc :

Web crippling ultimate capacity obtained by using Chinese steel structures design code (GB50013-2003)

R w,ule :

Web crippling ultimate capacity obtained by using European design of steel structures (Eurocode 3)

R w,ulFEA :

Web crippling ultimate capacity obtained by using finite element analysis

R w,ulre :

Web crippling ultimate capacity obtained by using equations the paper put forward

f y :

Tensile yield stress

f u :

Ultimate tensile stress

ν :

Poisson’s ratio

δ :

Elongation after fracture

E :

Elastic modulus

MD:

Average deviation of yield stress

σ :

Standard deviation of yield stress

h :

Overall height of I-beam

b :

Flange height of I-beam

h t :

Web effective height of I-beam

t :

Web thickness of I-beams

r :

Internal radius of corner

a :

Bearing length

h t /t :

Web slenderness

ε i :

Strain intensity

ε 1 :

First principal strain

ε 2 :

Second principal strain

ε 3 :

Third principal strain

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Acknowledgments

This research work was supported by the National Natural Science Foundation of China (Nos. 51278209 and 51478047) and the Research Grant for Young and Middle-aged Academic Staff of Huaqiao University (No. ZQN-PY110). The authors are also thankful to Fuan Steel Structure Engineering Co., Ltd., for the fabrication of test specimens. The tests were conducted in Fujian Key Laboratory on Structural Engineering and Disaster Reduction at Huaqiao University. The support provided by the laboratory staff is gratefully acknowledged.

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Authors and Affiliations

  1. School of Urban Construction, Yangtze University, Jingzhou, 434023, China

    Yu Chen

  2. College of Civil Engineering, Huaqiao University, Xiamen, 361021, China

    Yu Chen & Chaoyang Wang

  3. College of Technology & Engineering, Yangtze University, Jingzhou, 434023, China

    Xixiang Chen

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  1. Yu Chen
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  2. Xixiang Chen
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  3. Chaoyang Wang
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Correspondence to Xixiang Chen.

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Chen, Y., Chen, X. & Wang, C. Experimental and finite element analysis research on I-beam under web crippling. Mater Struct 49, 421–437 (2016). https://doi.org/10.1617/s11527-014-0508-z

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  • DOI: https://doi.org/10.1617/s11527-014-0508-z

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