Creep Analysis of Simply Supported-to-Continuous Box Girders Under Shear Lag Effect

SUN Yong-xin; LIN Peng-zhen

doi:10.3879/j.issn.1000-0887.2015.08.007

Volume 36 Issue 8

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SUN Yong-xin, LIN Peng-zhen. Creep Analysis of Simply Supported-to-Continuous Box Girders Under Shear Lag Effect[J]. Applied Mathematics and Mechanics, 2015, 36(8): 855-864. doi: 10.3879/j.issn.1000-0887.2015.08.007

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Creep Analysis of Simply Supported-to-Continuous Box Girders Under Shear Lag Effect

doi: 10.3879/j.issn.1000-0887.2015.08.007

Key Laboratory of Road & Bridge and Underground Engineering of Gansu Province(Lanzhou Jiaotong University), Lanzhou 730070, P.R.China

Funds: The National Natural Science Foundation of China（51208242;51368031）

Received Date: 2015-02-02
Rev Recd Date: 2015-04-17
Publish Date: 2015-08-15

Abstract

Abstract

To analyze how creep interacts with shear lag effect in concrete box girders, the calculation formulae for the creep secondary internal force and stress were derived with the energy variation method. With a simply supported-to-continuous box girder for example, the creep bending moment and stress were calculated under the shear lag effect, and the shear lag coefficients were obtained under the influence of creep. The results show that the shear lag effect increases the creep stress significantly. Under the shear lag effect, the creep variation at the intermediate bearing section is the maximum, where the secondary bending moment increases by 42.56% and the flange normal stress above the web plate decreases by 8.5%.
- concrete box girder,
- shear lag effect,
- creep,
- simply supported-to-continuous

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References(15)

References

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