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Uncertainty analysis of the power law extrapolation techniques for adhesive anchors
Author(s) -
Podroužek Jan,
WanWendner Roman
Publication year - 2018
Publication title -
structural concrete
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.912
H-Index - 34
eISSN - 1751-7648
pISSN - 1464-4177
DOI - 10.1002/suco.201700191
Subject(s) - extrapolation , regression , power law , linear regression , sensitivity (control systems) , computer science , set (abstract data type) , regression analysis , creep , econometrics , reliability engineering , engineering , mathematics , statistics , machine learning , materials science , composite material , electronic engineering , programming language
Modern construction industry is increasingly utilizing postinstalled adhesive anchors as an alternative to traditional mechanical anchors. Although the application of adhesive anchors under sustained load offers many advantages, the associated approval guidelines based on a power law extrapolation technique have a number of ambiguities and limitations, which are shortly reviewed in this paper and subjected to uncertainty quantification and sensitivity analyses. Some of the observations presented may be considered as specific to the available experimental database of sustained load test, while some recommendations are universal, as they relate to the underlying creep phenomena and robust measures in regression. It is further shown, how a regression based safety factor could be derived from an experimental database and a possibilistic set of plausible choices.