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Uncertainty analysis of the power law extrapolation techniques for adhesive anchors

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 t...

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Bibliographic Details
Published in:Structural concrete : journal of the FIB 2018-12, Vol.19 (6), p.1760-1770
Main Authors: Podroužek, Jan, Wan‐Wendner, Roman
Format: Article
Language:English
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Summary: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.
ISSN:1464-4177
1751-7648
DOI:10.1002/suco.201700191