Abstract
Field measurement data on wind velocities and wind-induced acceleration responses at the top of the 492 m high Shanghai World Financial Center (SWFC) under normal climate conditions are studied. Characteristics of the mean wind speeds and turbulence intensities, gust factors, power spectral densities, and turbulence integral scales of the fluctuating wind speed are analyzed in different observation time intervals. Power spectral densities of wind-induced acceleration are also investigated. The basic natural frequencies and structural damping ratios of the building are identified based on Hilbert-Huang transform method and random decrement method. The field measurement results of wind-induced responses of the SWFC are finally compared with those from the corresponding high-frequency force balance wind tunnel test study.
Highlights
Field measurement of wind velocities and wind-induced responses is an essential aspect of wind engineering
In 1960, a field measurement study on mean wind speed at different heights and time intervals was conducted by Durst [1], who proposed an empirical formula for different terrain categories
Based on the wind speed and wind-induced acceleration responses measured by the structural health monitoring system (SHMS) installed on the Shanghai World Financial Center (SWFC), the mean and fluctuating wind speeds at a level near 500 m under normal climate conditions are analyzed in the present study
Summary
Field measurement of wind velocities and wind-induced responses is an essential aspect of wind engineering. The field measurement data of the windinduced responses at the top of a 254 m high bridge tower was researched by Larose et al [9] and compared with the corresponding wind tunnel test study results in frequency domain. The dynamic characteristics of a 200 m high building were identified from its field measured wind-induced vibration data by Li et al [10], and the correlation between structural damping and acceleration responses was discussed. Based on the wind speed and wind-induced acceleration responses measured by the structural health monitoring system (SHMS) installed on the SWFC, the mean and fluctuating wind speeds at a level near 500 m under normal climate conditions are analyzed in the present study. The wind-induced acceleration responses from the field measurement are compared with those from the corresponding high-frequency force balance (HFFB) wind tunnel test study.
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