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Experimental study of dynamic compressive behaviour of concrete material reinforced with spiral steel fibres

Hao, YF, Hao, H and Wang, Y (2013) Experimental study of dynamic compressive behaviour of concrete material reinforced with spiral steel fibres In: SI13: 10th International Conference on Shock & Impact Loads on Structures (2013), 2013-11-25 - 2013-11-25, Singapore.

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It has been well demonstrated that the impact loading resistance capacity of the concrete material can be effectively increased by adding fibres. Recent studies proved that compared to other conventional steel fibres, using steel fibres with spiral shape further increases the post-failure energy absorption and crack stopping capacities of concrete because of the better bonds in the concrete matrix and larger deformation ability. The present study conducts high rate impact tests using split Hopkinson pressure bar (SHPB) to further investigate the dynamic compressive properties of spiral fibre reinforced concrete (SFRC). SFRC specimens with different volume fractions of fibres ranging from zero to 1.5% are prepared and tested. The influences of different volume fractions of fibres on strength, stress-strain relation and energy absorption of SFRC specimens under quasi-static and dynamic loadings are studied. In SHPB compression tests, the strain rate achieved ranges from 50 1/s to 200 1/s. Highspeed camera is used to capture the failure processes and failure modes of SFRC specimens with different fibre volume fractions during the tests for comparison. Dynamic stress-strain curves under different strain rates are derived. The energy absorption capacities of the tested specimens are obtained and compared. Strain rate effects on the compressive strength are also discussed. The corresponding empirical DIF (dynamic increase factor) relations for SFRC are proposed.

Item Type: Conference or Workshop Item (Conference Paper)
Subjects : Civil Engineering
Divisions : Surrey research (other units)
Authors :
Hao, YF
Hao, H
Date : 2013
Copyright Disclaimer : © 2013, Shock & Impact Loads on Structures Conference
Contributors :
publisherShock & Impact Loads on Structures Conference,
Uncontrolled Keywords : Spiral fibre, Steel fibre reinforced concrete, Dynamic compression, SHPB
Related URLs :
Depositing User : Symplectic Elements
Date Deposited : 17 May 2017 13:55
Last Modified : 23 Jan 2020 18:59

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