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Effect of confinement of SFRHPC subjected to uniaxial compression

Author(s): N. Ganesan, P. V. Indira, R. Abraham
Paper category: Workshop
Book title: Fifth International RILEM Workshop on High Performance Fiber Reinforced Cement Composites (HPFRCC5)
Editor(s): H.W. Reinhardt, A.E. Naaman
ISBN: 978-2-35158-046-2
Pages: 193 - 201
Total Pages: 9
Language: English

An experimental investigation was carried out to study the effect of confinement on the strength and behaviour of Steel Fibre reinforced High Performance Concrete (SFRHPC). The investigation consists of casting and testing of 80 SFRHPC cylindrical specimens of 150mm x 300 mm in size. The specimens were subjected to both monotonically increasing load and cyclic loading. The fibres considered in this study include corrugated steel fibres having aspect ratio 66. Four values of volume fraction of fibres viz. 0.25,0.50,0.75 and 1.0 were used. The confinement was provided in the form of spirals having different values of pitch viz. 25 mm, 50 mm and 75 mm. Out of the 80 specimens 40 were subjected to monotonically increasing loading and the remaining were subjected to cyclic loading. Tests reveal that increase in the volumetric ratio of transverse reinforcement increases the ultimate strength of High Performance Concrete (HPC) and SFRHPC. However the percentage of increase is higher for SFRHPC specimens than for HPC. Strain at peak load was found to be significantly improved as the confinement increased. Combined effect of confinement and fibre improved several engineering properties such as strain at peak load, ultimate strength, energy absorption capacity etc. These results indicate that SFRHPC with proper confinement could be used in structures subjected to extreme load conditions such as seismic loading, blast and impact loading.

Online publication: 2014
Publication Type: full_text
Public price (Euros): 0.00

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