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Statistical analysis of pull-out tests - the european concrete frame building project



Title: Statistical analysis of pull-out tests - the european concrete frame building project
Author(s): M.N. Soutsos, J.H. Bungey, A.E. Long
Paper category : conference
Book title: RILEM Symposium on On Site Assessment of Concrete, Masonry and Timber Structures - SACoMaTiS 2008
Editor(s): L. Binda, M. di Prisco, R. Felicetti
Print-ISBN: 978-2-35158-061-5
e-ISBN: 978-2-35158-075-2
Publisher: RILEM Publications SARL
Publication year: 2008
Pages: 267 - 276
Total Pages: 10
Nb references: 14
Language: English


Abstract: A full scale seven-storey reinforced concrete building frame was constructed in-situ in the Building Research Establishment’s Cardington laboratory encompassing a range of different concrete mixes and advanced construction techniques. This provided an opportunity to assess in-situ non-destructive test methods, namely the pull-out test and more specifically the Danish version which has been known as the Lok test, on a systematic basis during the construction of the building. Strength correlations were determined using a power function regression analysis. It is not, however, sufficient to simply average the values of the in-place test results and then compute the equivalent compressive strength by means of this established strength relationship. It is necessary to account for the uncertainties that exist. Interpretation of inplace tests should take into account the uncertainties that exist and therefore should be made by the use of standard statistical procedures. While no procedure has yet been universally accepted, proponents of in-place testing have developed and are using statistically based interpretations. The “tolerance factor approach” and “Carino’s alternative method” have been used for the interpretation of the results and it is shown that the former is resulting in more conservative strength predictions than the latter when the standard deviation of insitu Lok tests is high.


Online publication: 2009-05-26
Publication type : full_text
Public price (Euros): 0.00