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Wind and Structures Volume 14, Number 3, May 2011 , pages 253-283 DOI: https://doi.org/10.12989/was.2011.14.3.253 |
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Field monitoring of wind effects on a super-tall building during typhoons |
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Lunhai Zhi, Q.S. Li, J.R. Wu and Z.N. Li
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| Abstract | ||
| This paper presents the field measurement results of wind effects on a super-tall building (CITIC Plaza, 391 m high) located in Guangzhou. The field data such as wind speed, wind direction and acceleration responses were simultaneously and continuously recorded from the tall building by a wind and vibration monitoring system during two typhoons. The typhoon-generated wind characteristics including turbulence intensity, gust factor, peak factor, turbulence integral length scale and power spectral density of fluctuating wind speed were presented and discussed. The dynamic characteristics of the tall building were determined based on the field measurements and compared with those calculated from a 3D finite element model of the building. The measured natural frequencies of the two fundamental sway modes of the building were found to be larger than those calculated. The damping ratios of the building were evaluated by the random decrement technique, which demonstrated amplitude-dependent characteristics. The field measured acceleration responses were compared with wind tunnel test results, which were found to be consistent with the model test data. Finally, the serviceability performance of the super-tall building was assessed based on the field measurement results. | ||
| Key Words | ||
| wind effect; reinforced concrete structure; tall building; typhoon; full-scale measurement; dynamic response; wind tunnel test. | ||
| Address | ||
| Lunhai Zhi and Z.N. Li:Key Laboratory of Building Safety and Energy Efficiency of Ministry of Education, College of Civil Engineering, Hunan University, Changsha, Hunan, P.R. China Q.S. Li and J.R. Wu : Department of Building and Construction, City University of Hong Kong,Tat Chee Avenue, Kowloon, Hong Kong J.R. Wu : School of Civil Engineering, Guangzhou University, Guangzhou, Guangdong, P.R. China | ||