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Dynamic analysis and optimisation using morphological indicators

 Dynamic analysis and optimisation using morphological indicators
Author(s): , ,
Presented at 17th IABSE Congress: Creating and Renewing Urban Structures – Tall Buildings, Bridges and Infrastructure, Chicago, USA, 17-19 September 2008, published in , pp. 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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Bibliographic Details

Author(s):


Medium: conference paper
Language(s): English
Conference: 17th IABSE Congress: Creating and Renewing Urban Structures – Tall Buildings, Bridges and Infrastructure, Chicago, USA, 17-19 September 2008
Published in:
Page(s): 558-559 Total no. of pages: 10
Page(s): 558-559
Total no. of pages: 10
Year: 2008
DOI: 10.2749/222137908796293910
Abstract:

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.

Keywords:
resonance conceptual design tuned mass damper volume minimisation morphological indicators