INVESTIGADORES
ZERBINO Raul Luis
artículos
Título:
Uniaxial tension test for steel fibre reinforced concrete - A parametric study
Autor/es:
BARRAGÁN, B.; GETTU, R.; MARTÍN, M.A; ZERBINO, R.
Revista:
CEMENT & CONCRETE COMPOSITES
Editorial:
Elsevier
Referencias:
Lugar: Oxford; Año: 2003 vol. 25 p. 767 - 777
ISSN:
0958-9465
Resumen:
A RILEM Draft Recommendation
was proposed in 2001 for obtaining the stress versus crack opening (s-w)
response of steel fibre reinforced concrete through a uniaxial tension test. The
present study analyses the robustness of the recommended test through a
parametric study. Furthermore, the methodology is extrapolated to cores
extracted from cast elements. Also, the effect of the coring direction with
respect to the preferential fibre orientation caused by the compaction
procedure is examined. The study demonstrates that the test is robust and
representative of the material response, and could be used for determining the s-w
relation of the material that may be needed for comparing the performance of
different fibres or for providing input for finite element analysis. No
significant influence of the characteristics of the specimen or problems of
instability due to the loss of control were encountered. There is some relative
rotation between the crack faces but its influence on the s-w response is
expected to be negligible. The parameters obtained from the tests exhibit
coefficients of variation of up to 30%, which is mainly attributed to the randomness
of the number of fibres bridging the crack, considering the relatively small
cross-section of the specimen.