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Influence of Higher Modes on the Response of Irregular Tall Buildings

 Influence of Higher Modes on the Response of Irregular Tall Buildings
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. 582-583
DOI: 10.2749/222137908796293983
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Traditionally tall buildings are designed considering the dynamic response given only by the first three fundamental modes of vibration. This hypothesis is generally accepted for tall buildings of ...
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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): 582-583 Total no. of pages: 8
Page(s): 582-583
Total no. of pages: 8
Year: 2008
DOI: 10.2749/222137908796293983
Abstract:

Traditionally tall buildings are designed considering the dynamic response given only by the first three fundamental modes of vibration. This hypothesis is generally accepted for tall buildings of regular geometric profile and uncoupled modes of vibration as any error committed is generally considered to be known and acceptable. However recent trends in the design of tall buildings have seen many proposals for structures with complex forms resulting in complex 3D modes and greater sensitivity to wind direction. In this paper the effects of mode truncation on various response quantities such as top floor translational and angular accelerations, base bending moment and torque is investigated for an irregular tall building having complex 3D mode shapes. The sensitivity of the errors to wind direction is also examined.

Keywords:
modal analysis tall buildings structural response time domain analysis