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Dynamic analysis and optimisation using morphological indicators

 Dynamic analysis and optimisation using morphological indicators
Autor(en): , ,
Beitrag für 17th IABSE Congress: Creating and Renewing Urban Structures – Tall Buildings, Bridges and Infrastructure, Chicago, USA, 17-19 September 2008, veröffentlicht in , S. 558-559
DOI: 10.2749/222137908796293910
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This paper presents a basic analysis methodology to predict if a structure meets the design requirements concerning dynamic behaviour at conceptual design stage, combining a single degree of freedo...
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Autor(en):


Medium: Tagungsbeitrag
Sprache(n): Englisch
Tagung: 17th IABSE Congress: Creating and Renewing Urban Structures – Tall Buildings, Bridges and Infrastructure, Chicago, USA, 17-19 September 2008
Veröffentlicht in:
Seite(n): 558-559 Anzahl der Seiten (im PDF): 10
Seite(n): 558-559
Anzahl der Seiten (im PDF): 10
Jahr: 2008
DOI: 10.2749/222137908796293910
Abstrakt:

This paper presents a basic analysis methodology to predict if a structure meets the design requirements concerning dynamic behaviour at conceptual design stage, combining a single degree of freedom model and morphological indicators (MI). MI are dimensionless numbers allowing to represent a structural property (volume, displacement, eigenfrequency,…) with a limited numbers of variables. The theory of MI is based on the use of a fully stressed design and optimisation from the point of view of resistance (Ultimate Limit State). Achieving satisfying vibration behaviour of a structure is a serviceability constraint (Serviceability Limit State) and is therefore not necessarily met by ULS-optimised solutions, especially in lightweight design. If the vibration behaviour is not acceptable the possibilities offered by a tuned mass damper, topology modification and stress level reduction are discussed. In this case, the use of MI as a design tool is no longer advantageous.

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