Aeroelastic Effects on Tall Buildings: Performance-Based Comfort Analysis ; Aeroelastische Auswirkungen auf Hochhäuser: Komfortanalyse über den Performance-Based Ansatz
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Media type:
E-Book;
Electronic Thesis;
Doctoral Thesis;
Text
Title:
Aeroelastic Effects on Tall Buildings: Performance-Based Comfort Analysis ; Aeroelastische Auswirkungen auf Hochhäuser: Komfortanalyse über den Performance-Based Ansatz
Contributor:
Pozzuoli, Chiara
[Author]
imprint:
TU Braunschweig: LeoPARD - Publications And Research Data, 2012-11-08
Footnote:
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Description:
Recent trends towards increasingly taller and slender buildings have led to a new generation of wind-sensitive structures that can experience large wind-induced vibrations. Excessive dynamic oscillations can then cause discomfort to occupants, sometimes raising concerns about serviceability design problems. Since the human perception of vibration is closely related to the acceleration response of structures, the assessment of wind-induced discomfort can be properly carried out through a reliable estimation of the acceleration responses which, particularly in the across-wind direction, may be influenced by aeroelastic effects. Within this context, a wide experimental campaign was carried out in this study in order to evaluate the wind-induced loads and responses of a continuous equivalent aeroelastic model of a regular square-section tall building. Measurements of surface pressures on 126 taps, overall forces, across-wind displacements and across-wind and along-wind accelerations were simultaneously carried out. From the analysis of the measured pressure field and responses several results were obtained including the possible variation of the Strouhal number with height over the tunnel floor, the correlation structure of pressures, the lock-in wind speed range and the RMS acceleration and displacement responses as functions of wind speed. Aeroelastic effects involving the across-wind response, which largely exceeds the along-wind one, were evaluated in terms of aerodynamic damping using an experimental-numerical procedure. Across-wind aerodynamic damping is found to take positive values for the model tested having high Scruton number and to be in general agreement with other literature results. A general procedure for wind risk assessment of tall buildings related to comfort, in line with the Performance-Based Design (PBD) approach and the PEER (Pacific Earthquake Engineering Research [Center]) equation, is proposed and applied to a case-study building. ; Die derzeitige Tendenz zum Bau immer höherer und ...