The Dynamic Mechanical Constitutive Equation of Concrete under High Temperture

Bin Jia; Zheng Liang Li; Jun Lin Tao; Chun Tao Zhang

doi:10.4028/www.scientific.net/AMM.99-100.782

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 99-100The Dynamic Mechanical Constitutive Equation of...

The Dynamic Mechanical Constitutive Equation of Concrete under High Temperture

Abstract:

Based on the test by the split Hopkinson Pressure Bar (SHPB), in this papaer the research on the dynamic mechanical properties of concrete under high temperture has been conducted, the influence law of temperature and strain rate on the mechanical peoperties has been analyzed, and the dynamic stress-strain curves of concrete under high temperature have been obtained. Analysis indicate that the concrete strain rate hardening effect is coupled with the high temperature weakening effect. Therefore, on the basis of classical damage theoretical model, in accordance with the concrete high-temperature dynamic mechanical characteristics, a unified equation is established to describe the whole process of concrete dynamic stress-strain relationship under high temperature, which is well coincided with the test results.

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Periodical:

Applied Mechanics and Materials (Volumes 99-100)

Pages:

782-785

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.99-100.782

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Online since:

September 2011

Authors:

Bin Jia, Zheng Liang Li, Jun Lin Tao, Chun Tao Zhang

Keywords:

Concrete, Damage Model, Dynamic Constitutive Relation, High-Temperature

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References

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