Large-eddy simulation of wind effects on a super-tall building in urban environment conditions

Yan, Bowen; Li, Qiusheng

doi:10.1080/15732479.2015.1051997

Cited by 23 publications

(7 citation statements)

References 35 publications

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“…As these buildings are commonly characterized by low natural frequencies and high flexibilities, they become considerably sensitive to wind load [2]. In light of the significance of wind effects on the safety and the serviceability of such skyscrapers, continuous efforts have been made on this topic via different methods, such as wind tunnel tests and numerical simulation [3][4][5][6][7]. However, due to the complexity of involved issues, field study is generally regarded as the most credible way for such investigations at present.…”

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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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: 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 LES simulations are performed together with ANSYS/Fluent 14.5 and the parallel calculations of 16 central processing units. The total time steps are nearly 41000 with 0.05 s per time step, which are sufficient to reach the statistical convergence for LES simulations [10,12]. [11].…”

Section: Numerical Algorithmsmentioning

confidence: 97%

“…The blocking rate of CFD numerical model in the computational domain is less than 3%, which is generally acceptable in CWE [9]. According to the multiblock technique in the previous study [12], the flow field consists of two blocks: The small cylindrical flow field and CFD numerical model, which are combined together by a Boolean operation, are defined as "Block 1" in Figure 2(a), and the remaining part (i.e., the big rectangular flow field) is defined as "Block 2" in Figure 2(b). One thing is to note that the CFD numerical model is nested in "Block 1."…”

Section: Numerical Algorithmsmentioning

confidence: 99%

“…The improved LES approach proposed by Huang and Li [26] has been developed as a Fluent User Defined Function (UDF) library, which has been applied in conducting LES simulations of tall buildings and long-span complex roof structures in the previous studies [10,12].…”

Section: Les Turbulence Modelmentioning

confidence: 99%

“…Owing to the rapid developments of computer power and computational methods, CFD predictions have been widely used to analyze the wind flows around prototype structures in engineering practice [12]. Large eddy simulation (LES), as one of the main CFD methods, has been widely applied in the simulations of wind fields.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Numerical Simulation of Fluctuating Wind Effects on an Offshore Deck Structure

Zhou

Han

et al. 2017

Shock and Vibration

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The offshore structures that play a vital role in oil and gas extraction are always under complicated environmental conditions such as the random wind loads. The structural dynamic response under the harsh wind is still an important issue for the safety and reliable design of offshore structures. This study conducts an investigation to analyze the wind-induced structural response of a typical offshore deck structure. An accurate and efficient mixture simulation method is developed to simulate the fluctuating wind speed, which is then introduced as the boundary condition into numerical wind tunnel tests. Large eddy simulation (LES) is utilized to obtain the time series of wind pressures on the structural surfaces and to determine the worst working condition. Finally, the wind-induced structural responses are calculated by ANSYS Parametric Design Language (APDL). The numerically predicted wind pressures are found to be consistent with the existing experimental data, demonstrating the feasibility of the proposed methods. The wind-induced displacements have the certain periodicity and change steadily. The stresses at the top of the derrick and connections between deck and derrick are relatively larger. These methods as well as the numerical examples are expected to provide references for the wind-resistant design of the offshore structures.

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Assessment of computational fluid dynamic as a design tool for estimation of wind loads on unconventional skyscrapers in urban environment

Lu,

Li,

Han

2024

Structural Design Tall Build

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Computational fluid dynamic (CFD) has not been widely accepted as a design tool in current wind‐resistant structural design practices due to its contentious accuracy. To promote the application of CFD in wind‐resistant structural design, the accuracy of CFD should be comprehensively validated. However, most previous validation studies were focused on isolated generic or regular‐shaped buildings. This paper evaluates the accuracy of large eddy simulation (LES) in predicting the wind loads on a 600‐m‐high supertall building with a complex appearance in a realistic urban area against wind tunnel test results. The aerodynamic characteristics obtained from the LES and the wind tunnel test are compared and analyzed in detail, including wind pressure and force coefficients, wind force spectra, base moments, and correlations of the wind loads. This study aims to assess the performance and potential as well as the strengths and weaknesses of CFD in predicting wind loads on high‐rise buildings in an urban environment and promote its application to the wind‐resistant design of skyscrapers.

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Large-eddy simulation of wind effects on a super-tall building in urban environment conditions

Cited by 23 publications

References 35 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

Numerical Simulation of Fluctuating Wind Effects on an Offshore Deck Structure

Assessment of computational fluid dynamic as a design tool for estimation of wind loads on unconventional skyscrapers in urban environment

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