ISSN: 1546-962X
Published Online: 3 January 2005
Page Count: 12

The Role of Friction in Post-Crack Energy Absorption of Fiber Reinforced Concrete in the Round Panel Test
Bernard, ES
TSE Pty. Ltd., NSW

(Received 18 October 2002; accepted 2 September 2004)

Abstract

The Round Panel test has recently become standardized as C-1550 for post-crack performance assessment of Fiber Reinforced Concrete (FRC) and Shotcrete (FRS). This test involves the imposition of an out-of-plane point load at a constant rate of displacement to the center of a round panel supported on three symmetrically arranged pivots. Performance is measured in terms of the energy absorbed by the specimen up to a specified central deflection. Most of this energy is expended in the process of fiber deformation and pull-out from the concrete across cracks that form during the test. A significant proportion of the energy apparently absorbed by the specimen is actually lost to friction, however, as the panel fragments that form after cracking of the concrete slide outward in a radial direction across the supports. This investigation has been undertaken to determine the proportion of total energy absorption that is lost to friction as a result of this failure mechanism and to identify thereby how much energy is actually absorbed by the specimen.

Keywords:
fiber reinforced concrete, panel testing, post-crack performance, friction

Paper ID: JAI11771
DOI: 10.1520/JAI11771
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