Direct tension test and interpretation

Title: Direct tension test and interpretation
Author(s): R. Gettu, B. E. Barragán
Paper category : conference
Book title: International RILEM Workshop on Test and Design Methods for Steelfibre Reinforced Concrete
Editor(s): B. Schnütgen and L. Vandewalle
Print-ISBN: 2-912143-38-1
e-ISBN: 2351580168
Publisher: RILEM Publications SARL
Publication year: 2003
Pages: 15 - 30
Total Pages: 16
Nb references: 15
Language: English

Abstract: A RILEM Draft Recommendation was proposed in 2001 for obtaining the stress versus crack opening (sigma-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. The study demonstrates that the test is adequately representative of the material response, and could be used for determining the (sigma-w) relation of the material that may be needed for comparing the performance of different fibres or for providing input for structural analysis. No significant influence of the characteristics of the specimen or problems of instability due to the loss of control was identified. During the test, there is some relative rotation between the crack faces but its influence on the (sigma-w) response is expected to be negligible. The parameters obtained from the tests however exhibit coefficients of variation of up to 30%; this high degree of variability is mainly attributed to the randomness of the number of fibres bridging the crack, considering the relatively small cross-section of the specimen.

Online publication: 2003-02-15
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/2351580168.002