On the existing test dataset of isotropic cylindrical metal shells under axial compression and the design of modern metal civil engineering shells
File(s)
Published version
Author(s)
Sadowski, Adam
Terres Morata, Maria
Kathirkamanathan, Lijithan
Seidel, Marc
Rotter, J Michael
Type
Journal Article
Abstract
In the structural engineering limit state design philosophy of the Eurocodes, a target reliability is achieved by using partial safety factors on both the loading and the resistance that are, in principle, to be calibrated based on test data. The partial factor that is currently used for the buckling limit state of metal shells has been adopted from the knowledge base on other structural elements and has been retained for reasons of historical continuity and to maintain a close relationship between all Eurocode steel design standards . However, the mechanics of the behaviour of thin-wal led metal shells gives strong reasons to believe that the partial factors for buckling should be dependent on the shell geometrical form, slenderness, load case and quality of fabrication for the target reliability to be consistently
achieved. None of these are currently considered in defining the partial factor for resistance.
The most ubiquitous thin-walled metal shell structures are imperfection-sensitive cylinders under uniform axial compression. A dataset of many hundreds of these test results has thus been accumulated over many decades , though it is of variable quality and sparsely documented. This paper shows that this dataset is an entirely inappropriate basis on which to
calibrate the safety level of full-scale metal civil engineering shells. Indeed, the professional community should face the uncomfortable reckoning that an experimental test dataset suitable for the reliable calibration of the safety level of design relationships for full-scale metal civil engineering shells may likely never come into existence, and that the bolder approach of extensive computational simulation must instead be embraced.
achieved. None of these are currently considered in defining the partial factor for resistance.
The most ubiquitous thin-walled metal shell structures are imperfection-sensitive cylinders under uniform axial compression. A dataset of many hundreds of these test results has thus been accumulated over many decades , though it is of variable quality and sparsely documented. This paper shows that this dataset is an entirely inappropriate basis on which to
calibrate the safety level of full-scale metal civil engineering shells. Indeed, the professional community should face the uncomfortable reckoning that an experimental test dataset suitable for the reliable calibration of the safety level of design relationships for full-scale metal civil engineering shells may likely never come into existence, and that the bolder approach of extensive computational simulation must instead be embraced.
Date Issued
2023-05-01
Date Acceptance
2022-09-16
Citation
Structural Safety, 2023, 102
ISSN
0167-4730
Publisher
Elsevier
Journal / Book Title
Structural Safety
Volume
102
Copyright Statement
© 2022 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
License URL
Publication Status
Published
Article Number
ARTN 102285
Date Publish Online
2023-02-24