Analysis of wind-induced vibrations in high-rise buildings

TY - GEN

T1 - Analysis of wind-induced vibrations in high-rise buildings

AU - Persson, Peter

AU - Austrell, Per-Erik

AU - Kirkegaard, Poul Henning

AU - Andersen, Lars Vabbersgaard

AU - Steffen, Frederik

N1 - ISSN: 0105-175x

PY - 2016/8/21

Y1 - 2016/8/21

N2 - Buildings are getting taller due to increased urbanisation and densification of cities. More advanced construction methods and the desire to construct impressive buildings is also supporting the trend. Due to their inherent slenderness resulting in low eigenfrequencies, these buildings are susceptible to wind-induced vibrations which can be highly disturbing for occupants. Already barely perceivable acceleration levels within the low-frequency range relevant to whole-body vibrations can cause nausea and discomfort, while high acceleration levels can cause alarm and fear amongst the occupants. The paper summarises acceptable acceleration levels in high-rise buildings (here referred to as buildings over 200 m in height) stated in different building codes and previous work on the subject. Accelerations of a high-rise building subjected to wind-loads are evaluated using a full numerical model and one reduced with Ritz-vectors and the results are compared. The paper focusses on wind-load dynamics in early stages of the design process, with an intent to give an indication of the dynamic properties of a building.

AB - Buildings are getting taller due to increased urbanisation and densification of cities. More advanced construction methods and the desire to construct impressive buildings is also supporting the trend. Due to their inherent slenderness resulting in low eigenfrequencies, these buildings are susceptible to wind-induced vibrations which can be highly disturbing for occupants. Already barely perceivable acceleration levels within the low-frequency range relevant to whole-body vibrations can cause nausea and discomfort, while high acceleration levels can cause alarm and fear amongst the occupants. The paper summarises acceptable acceleration levels in high-rise buildings (here referred to as buildings over 200 m in height) stated in different building codes and previous work on the subject. Accelerations of a high-rise building subjected to wind-loads are evaluated using a full numerical model and one reduced with Ritz-vectors and the results are compared. The paper focusses on wind-load dynamics in early stages of the design process, with an intent to give an indication of the dynamic properties of a building.

KW - High-rise buildings

KW - Ritz-vectors

KW - Wind-load response

M3 - Article in proceedings

SP - 7650

EP - 7661

BT - Proceedings of the 45th International Congress and Exposition on Noise Control Engineering -INTER-NOISE 2016

A2 - Kropp, Wolfgang

PB - German Acoustical Society (DEGA)

CY - Hamburg

T2 - 45th International Congress on Noise Control Engineering

Y2 - 21 August 2016 through 24 August 2016

ER -