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Required Thickness of Flexurally Rigid Baseplate for Anchor Fastenings

  • 2018
  • OriginalPaper
  • Chapter
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Abstract

The current design methods according to prEN1992-4 for multiple anchor fastenings with baseplates are based on the assumption that the baseplates are sufficiently rigid such that anchor tension forces are calculated using plane distribution method, as by analogy with beam bending where plane sections remain plane. But there is yet no provision on the level of stiffness required to achieve plane distribution of anchor tension forces. This can result in possible vulnerability in the practice of anchor design, because the baseplate may not be actually rigid enough to ensure plane distribution and there is no provision to check. The assumed rigid baseplate without checking its required stiffness may lead to the application of smaller anchor bolts and relatively thin (elastic) baseplates. This is unsafe since the real anchor tension forces on elastic baseplate can be much higher than those calculated with “plane distribution method”.
In this paper, a method for identifying the required baseplate thickness to achieve the conditions of rigid baseplate assumption is presented and illustrated with sample calculations. A design method with elastic baseplate is proposed and discussed.

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Title
Required Thickness of Flexurally Rigid Baseplate for Anchor Fastenings
Author
Longfei Li
Copyright Year
2018
DOI
https://doi.org/10.1007/978-3-319-59471-2_109
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