Split Hopkinson Bar Measurements of Steel Fiber Reinforced Concrete Exposed to High Temperature
YANG Shao-wei
BA Heng-jing
Abstract：A modified split Hopkinson pressure bar(SHPB) method was combined with strain gauge measurements to investigate the behavior of steel fiber reinforced concrete(SFRC) under uni-axial high-strain-rate compressive loading. The concrete was exposed to a temperature of 400℃ or 800 ℃. The experimental results show that the compressive strength and elastic modulus of non-steel-reinforced concrete drop to 79.2% and 82.80/60 of the room temperature values when exposed to 400 ℃. At 800 ℃, the compressive strength and elastic modulus drop to 38.9% and 56.2 % of the room temperature values. At the same time, the energy absorbing ability of the concrete has dropped to a great extent after exposure to the high temperatures. In comparison, the compressive strength of steel-reinforced concrete drops to 76.8% or 39.0% of the room temperature value after heating to 400 ℃ or 800 ℃. Compared to control concrete the elastic modulus of the steel-reinforced concrete decreased slightly, to 91.8% or 82.7% after heating to 400 ℃ or 800 ℃. The energy absorption ability also deteriorates after exposure to high temperature. Steel fiber reinforcement increases the ultimate strain and energy absorbing ability of concrete. The energy absorbing ability is increased by 38.5%, 27.5% or 25%, com-pared to non-reinforced concrete, after exposure to 20, 400 or 800℃ temperature.
Keywords：SFRCSHPBdynamic compressive propertiesenergy absorbing
Publication Date：2009-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 562-565 )