Reliability Assessment of Bonded Anchor Systems by Use of Probabilistic Methods


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Title: Reliability Assessment of Bonded Anchor Systems by Use of Probabilistic Methods

Author(s): Ronald Mihala, Andreas Unterweger, and Konrad Bergmeister

Publication: Special Publication

Volume: 283


Appears on pages(s): 1-18

Keywords: Bonded anchors, long term behavior, post-installed rebars

Date: 3/1/2012

Scope of this study is to estimate the reliability of bonded anchor systems. Furthermore, the use of a factor K in order to account the effect of sustained loading on a fastening’s failure probability pf, is discussed. As a general standard in structural engineering, it was assumed that the extreme failure probability of pf = 10-6 per year applies to fastenings as well. By use of the factor K, which can be considered as an index of safety reserves as well, the sensitivity of the investigated system to variations of particular parameters can be captured. In order to define the range of K the input parameters were elaborated statistically considering their mean values, variations and types of distribution. Apart from that, the influence of different input parameters was determined through a parametric study. The statistic input of the study was obtained either from the Probabilistic Model Code (Joint Committee of Structural Safety) or from experimental measurements. Final aim was to find a value for the factor K that guarantees a failure probability of pf = 10-6.