Wind tunnel test and field measurement study of wind effects on a 600‐m‐high super‐tall building

Zhang, J.W.; Li, Q.S.

doi:10.1002/tal.1385

Cited by 28 publications

(10 citation statements)

References 39 publications

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“…By averaging multiple time periods response with the specified duration τ under the same initial conditions, the so-called random decrement (RD) signature can be obtained: (13) where E ( •|C) is the conditional expectation under the condition C, and sgn[•] stand for sign function.…”

Section: Random Decrement Techniquementioning

confidence: 99%

“…During the last decades, numerous filed studies on dynamic performance of high-rise buildings under wind action have been conducted [8][9][10][11][12][13][14]. Among these works, Kijewski-Correa, et al established structural health monitoring (SHM) systems on four skyscrapers in Chicago and Dubai and analyzed the structure dynamic properties and the associated wind effect based on collected records [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

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Structural Responses of a Supertall Building Subjected to a Severe Typhoon at Landfall

et al. 2020

Applied Sciences

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Typhoon Mangkhut (1822) was one of the strongest tropical cyclones that ever impacted the south coast of China in past decades. During the passage of this typhoon, the structural health monitoring (SHM) system installed on a 303 m high building in this region worked effectively, and high-quality field measurements at nine height levels of the building were collected successfully, which provides a valuable opportunity to explore the dynamic properties of the building and the associated wind effects. In this study, the typhoon wind characteristics are presented first based on in-situ measurements at two sites. Acceleration responses of the building is then investigated, and the building’s serviceability is assessed against several comfort criteria. This study further focuses on the identification of modal parameters (i.e., natural frequency, damping ratio, and modal shape) via two methods: stochastic subspace identification (SSI) method and a method based on combined use of spectral analysis and random decrement technique (RDT). The good agreement between the two results demonstrates the effectiveness and the accuracy of the adopted methods. The obtained results are further compared with the stipulations in several technical codes as well as simulation results via finite element method to examine their performances in this real case. The amplitude dependence of natural frequencies and damping ratios of the studied building are also stressed.

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Section: Random Decrement Techniquementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Structural Responses of a Supertall Building Subjected to a Severe Typhoon at Landfall

et al. 2020

Applied Sciences

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“…The Technical Specification for Concrete Structures of Tall Buildings of China stipulates 25 gal as the occupancy comfort criterion for office or hotel buildings for wind speed with 10‐year return period. Wind tunnel testing results of PAFC revealed that the maximum peak acceleration atop PAFC subjected to wind speed with 10‐year return period was 35.6 gal, which exceeded the limit of the Chinese design code. In order to suppress the wind‐induced vibrations of the skyscraper to meet the requirement of the local design code, a set of two identical AMDs has been installed in PAFC.…”

Section: Field Vibration Tests On Pafcmentioning

confidence: 92%

Identification of modal parameters of a 600‐m‐high skyscraper from field vibration tests

Zhang

2019

Earthq Engng Struct Dyn

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Summary Accurate prediction of the dynamic responses of a high‐rise building subjected to dynamic loads such as earthquake and wind excitations requires the information of its structural dynamic properties such as modal parameters including natural frequencies and damping ratios. This paper presents the identification results of the modal parameters based on field vibration tests on a 600‐m high skyscraper. A set of tests, including ambient vibration test (AVT) and free vibration test (FVT), were conducted on the skyscraper to identify its modal parameters. Firstly, this paper presents and discusses the modal parameters of the skyscraper assessed by several identification methods applied to the AVT measurements. These methods include the wavelet transform (WT) method, the stochastic subspace identification (SSI) method, and the random decrement technique (RDT). Secondly, an active mass damper (AMD) system with total mass 1000 tons equipped into the skyscraper was used to excite the building for estimation of the modal parameters by FVT. Thirdly, this paper presents observations on the structural dynamic behavior of the skyscraper with the operation of the AMD system during a typhoon event. The field measurement results show that the AMD system functioned efficiently for suppression of the wind‐induced vibrations of the skyscraper during the typhoon. This paper aims to further understand the structural dynamic properties of super‐tall buildings and provide useful information for structural design and vibration control of future skyscrapers.

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“…The amplitude-dependent modal parameters have been studied by many researchers. [51][52][53][54] In this section, we discuss the variety of the damping ratios with RMS acceleration. The amplitude-dependent modal parameters have been identified by random decrement technique [32] and ERDT.…”

Section: Dynamic Characteristics Of Measured Datamentioning

confidence: 99%

“…The amplitude‐dependent modal parameters have been studied by many researchers . In this section, we discuss the variety of the damping ratios with RMS acceleration.…”

Section: Dynamic Characteristics Of Shanghai Towermentioning

confidence: 99%

Dynamic performance evaluation of Shanghai Tower under winds based on full‐scale data

Zhang

2019

Structural Design Tall Build

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Summary Shanghai Tower is the tallest building in China with a height of 632 m. This study aims to investigate the wind characteristics and its impact on Shanghai Tower so as to provide useful information for the wind‐resistant design of 600 m+ super‐tall buildings. By analyzing the data of wind speed during the occurrence of DeHong in June 2017, the relationship between turbulence intensity and mean wind speed is verified, and the correlation between gust factor and turbulence intensity is confirmed. Apart from that, it is also found that the von Karman spectrum fits well with the measured fluctuating wind speed spectrum. In addition, the 83rd and 117th acceleration data are analyzed to obtain the natural frequency by peak‐picking, frequency domain decomposition, stochastic subspace identification, and fast Bayesian fast Fourier transform methods. The amplitude‐dependence dynamic parameters of Shanghai Tower on the basis of the field measurements are studied as well. Finally, the wind‐induced vibration is investigated based on the acceleration data and wind speed data, which verifies that the responses along two main axes having a similar amplitude under wind effects. The occurrence of DeHong demonstrates that a gale equivalent to a typhoon may occur in urban areas without any urban warning.

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Wind tunnel test and field measurement study of wind effects on a 600‐m‐high super‐tall building

Cited by 28 publications

References 39 publications

Structural Responses of a Supertall Building Subjected to a Severe Typhoon at Landfall

Structural Responses of a Supertall Building Subjected to a Severe Typhoon at Landfall

Identification of modal parameters of a 600‐m‐high skyscraper from field vibration tests

Dynamic performance evaluation of Shanghai Tower under winds based on full‐scale data

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