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  4. Die Auswirkungen von Diffraktion und Multi-Reflexion auf zylindrische Stützen
 
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Die Auswirkungen von Diffraktion und Multi-Reflexion auf zylindrische Stützen

Other Titles
The effects of diffraction and multi-reflection on cylindrical columns
Publikationstyp
Journal Article
Date Issued
2020-01-01
Sprache
German
Author(s)
Hahn, Andreas  
Mensinger, Martin  
Rutner, Marcus  
Institut
Metall- und Verbundbau B-8  
TORE-URI
http://hdl.handle.net/11420/4800
Journal
Stahlbau  
Volume
89
Issue
1
Start Page
59
End Page
68
Citation
Stahlbau 1 (89): 59-68 (2020-01-01)
Publisher DOI
10.1002/stab.201900097
Scopus ID
2-s2.0-85078722772
The effects of diffraction and multi-reflection on cylindrical columns. The surrounding topology of a column potentially has a significant impact on a blast wave and the following design procedure. Effects like diffraction or multi-reflection does not seem to be included in design codes or technical literature. This issue shall be addressed within this paper. The paper addresses three main topics. First, the paper answers the question whether the area behind the column is protected, constituting a shadowed area. For the column itself, this is not of significant influence, but shall clarify if the load on a backwards-placed structure, e. g. a façade, can be determined correctly by using current technical codes. Second, a secondary shock-front, which originally initiates by diffraction and then distributes diagonally in space, shall be investigated. The correct load assessment on e. g. a second-row-column is discussed. Third, directly coupled with the assessment of incident pressure build-up behind the column due to diffraction is the quantification of pressure increase due to (multi-)wave reflection at a facade, leading to a significant pressure scale up, which might be relevant for design of column and/or façade.
Subjects
blast load
blast wave reflection
column
cylinder
diffraction
pressure increase factor (PIF)
shadowed area
two-dimensional (2D) CFD analysis
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