Engineering Transactions, 58, 3-4, pp. 139–151, 2010

Mechanical Response of Hpfrcc in Tension and Compression at High Strain Rate and High Temperature

E. CADONI
University of Applied Sciences of Southern Switzerland DynaMat Laboratory

A. M. BRAGOV
State University of Nizhny Novgorod Research Institute of Mechanics

A. CAVERZAN
Politecnico di Milano Department of Structural Engineering

M. DI PRISCO
Politecnico di Milano Department of Structural Engineering

A. KONSTANTINOV
State University of Nizhny Novgorod Research Institute of Mechanics

A. LOMUNOV
State University of Nizhny Novgorod Research Institute of Mechanics

The mechanical response of High Performance Fibre-Reinforced Cementitious Composite
(HPFRCC) has been analyzed at high strain rates and high temperature. Two experimental
devices have been used for compression and tension tests: the traditional Split Hopkinson
Pressure Bar for compression and the JRC-Split Hopkinson Tension Bar for tension. The
HPFRCC was thermally damaged at 3 temperatures (200◦C, 400◦C and 600◦C) in order to
analyze the dynamic behaviour of this material when explosions and fires took place in a tunnel.
Results show that significant peak strength increases both in tension and in compression. The
post-peak strength in tension depends on the thermal damage of the material. Its strain-
rate sensitivity and thermal damage have been illustrated by means of a Dynamic Increase
Factor. These results show that it is necessary to implement new expression of the DIF for the
HPFRCC, therefore more and more accurate and experimental studies using Kolsky–Hopkinson
Bar methods are needful.
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