Dynamic compressive toughness of high strength fibre reinforced concrete

Authors: Lihe Zhang, S. Mindess, N. Banthia
Paper category: conference
Book title: Concrete Durability and Service Life Planning – ConcreteLife’09
Editor(s): K. Kovler
Print ISBN: 978-2-35158-074-5
e-ISBN: 978-2-35158-085-1
Publisher: RILEM Publications SARL
Publication year: 2009
Pages: 293 – 301
Total Pages: 9
Language: English

Abstract: Fibre reinforced concrete (FRC) is known to exhibit superior performance in its postpeak energy absorption capacity (i.e., toughness) under both flexural and tensile loading. However, the behaviour of FRC under compressive impact has not previously been investigated in detail. In the present study, the strain rate response of FRC under compressive impact was investigated over the full strain rate regime, from static loading to high strain rate loading, and finally to impact loading. FRC was found to have higher strengths under compressive impact loading than under static loading. The compressive toughness under impact loading increased due to the higher peak load and higher strain capacity. FRC displayed a much higher Dynamic Improvement Factor (DIF) under compressive impact, and provided overall better performance under impact than under static loading. A constitutive model, incorporating the dynamic behaviour of concrete, was proposed to describe the DIF of the compressive strength. The model was found to match the test results for FRC with strength levels of 50 MPa, 90 MPa and 110 MPa, at strain rates from 10-5/sec to 10/sec.

Online publication: 2012-05-16
Publication Type: full_text
Public price (Euros): 0.00