Dynamic mechanical properties of dry and saturated concretes and their mechanism

Zhang Yong-liang; Zhu Da-yong; Li Yong-chi; Yao Hua-yan; Huang Rui-yuan; Li Xu-yang

doi:10.11883/1001-1455(2015)06-0864-07

Volume 35 Issue 6

Nov. 2015

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Zhang Yong-liang, Zhu Da-yong, Li Yong-chi, Yao Hua-yan, Huang Rui-yuan, Li Xu-yang. Dynamic mechanical properties of dry and saturated concretes and their mechanism[J]. Explosion And Shock Waves, 2015, 35(6): 864-870. doi: 10.11883/1001-1455(2015)06-0864-07

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Dynamic mechanical properties of dry and saturated concretes and their mechanism

doi: 10.11883/1001-1455(2015)06-0864-07

Zhang Yong-liang^{1, 2, 3},
Zhu Da-yong^{1, 3},
Li Yong-chi²,
Yao Hua-yan^{1, 2, 3
,
,},
Huang Rui-yuan²,
Li Xu-yang²

1.
School of Civil Engineering, Hefei University of Technology, Hefei 230009, Anhui, China
2.
Department of Modern Mechanics, University of Science and Technology of China, Hefei 230027, Anhui, China
3.
Anhui Provincial Civil Structural and Material Laboratory, School of civil Engineering, Hefei 230009, Anhui, China

Received Date: 2013-12-04
Rev Recd Date: 2014-04-02
Publish Date: 2015-12-10

Abstract

Abstract

We carried out SHPB tests on dry and saturated concretes using split Hopkinson and they were compared with quasi-static mechanical tests. The results show that the dry and saturated concretes produce an obvious strain rate effect: the ascending part of the stress-strain curve at moderate strain rate is steeper than that of the quasi-static curve; the increasing amplitude of dynamic strength of the saturated concrete, which has a stronger sensitivity to the strain rate, is nearly twice as that of the dry concrete; and there is a threshold of the strain rate, i.e., it is only when the strain rate exceeds this threshold that the dynamic strength of the saturated concrete becomes stronger than that of the dry concrete. Based on the experimental results, the equation showing the relationship between the concrete strength and the strain rate at different saturations is established and given.
- mechanics of explosion,
- threshold of strain rate,
- SHPB experiments,
- concrete,
- Stefan effect

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References(15)

References

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