Study on occupant comfort evaluation mode of tall buildings in wind excitation based on fuzzy probability method

Wang, D. Y.; Zhang, Y. S.; Zhou, Yun

doi:10.1002/tal.1365

Cited by 6 publications

(3 citation statements)

References 20 publications

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“…e outrigger is simplified as a concrete beam member. According to the method mentioned above, the cantilever end vertical deformation is 8 mm, and the back-calculated 2 . Assuming that the height-towidth ratio is 2 in the simplified model, the beam size will be 4200 × 2100 mm.…”

Section: Simplified Model Of Wind-induced Human Comfortmentioning

confidence: 99%

“…e prevalent structure system adopted in supertall (>300 m) and megatall (>600 m) buildings is the megaframe core wall structure system, where the mega-frame is characterized by a secondary system [1,2]. is type of structure system is often accompanied by damped outriggers because as the height increases, the wind-induced horizontal vibration acceleration at the top of the structure is more likely to exceed the code provisions; this is the wind-induced human comfort problem of tall buildings [1][2][3][4][5][6]. ere are two methods to solve the problem of the wind-induced vibration comfort of structures, namely, adjusting the dynamic characteristics of the structure or adopting energy dissipation and vibration reduction schemes.…”

Section: Introductionmentioning

confidence: 99%

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Optimal Design of Mega‐Frame Core Wall Structures Equipped with Viscous Damped Outriggers for Human Comfort Performance under Wind Loading

Yang

Zhao

Shi

et al. 2021

Shock and Vibration

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Megatall and supertall buildings often adopt megastructure systems characterized by secondary structure systems, and the serviceability problem caused by wind-induced vibrations often becomes the dominant factor in the structural design. Because the deformation of a supertall building usually presents bending characteristics, a viscous damped outrigger can reduce the wind-induced vibration of a supertall building with the installation of a small number of viscous dampers. However, time history analysis of the prototype model considering the nonlinear characteristics of viscous dampers is time-consuming, which is not conducive for iterative design optimization. Additionally, the conventional simplified model composed of one cantilever beam cannot be used for the analysis and design of a viscous damped outrigger. In this study, a simplified wind-induced vibration prediction model is proposed based on the mechanical characteristics of megastructures. This simplified model is a plane model that includes both core walls and frames whose member size can be extracted from the original structure. Parametric analysis shows that the simplified model has high acceleration prediction accuracy. An optimal design method combined with the simplified model, which aims to minimize the damped outrigger system cost, is proposed. A 600-m supertall building is presented as a case study. The accuracy and effectiveness of the simplified model and the optimal design method proposed in this study are illustrated. Thus, applying this optimal design method in combination with the simplified model can save significant analysis and design time and is conducive to the application of viscous damped outriggers in practical engineering.

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Section: Simplified Model Of Wind-induced Human Comfortmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Optimal Design of Mega‐Frame Core Wall Structures Equipped with Viscous Damped Outriggers for Human Comfort Performance under Wind Loading

Yang

Zhao

Shi

et al. 2021

Shock and Vibration

View full text Add to dashboard Cite

show abstract

“…For modern super‐tall buildings, the design criteria of occupant comfort are becoming increasingly important and often govern the structural design due to the excessive wind‐induced vibration, even in moderate wind conditions . The full‐scale measurements provide a valuable opportunity to quantify the occupant comfort performance of tall buildings in service and validate the design.…”

Section: Introductionmentioning

confidence: 99%

Probabilistic assessment of vibration exceedance for a full‐scale tall building under typhoon conditions

Huang

et al. 2018

Structural Design Tall Build

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Summary Full‐scale wind and vibration measurements were conducted on a 270‐m tall building in Hong Kong. For the modal identification, a refined fast Bayesian fast Fourier transform method was newly developed by considering the exponential form of the modal wind force spectrum. Then, the modal parameters of the monitored building and their uncertainties were identified from the full‐scale vibration data under typhoon conditions by the proposed refined fast Bayesian fast Fourier transform method. For assessing the vibration exceedance of the monitored building under typhoon, a stochastic wind force field generation technique was developed by combining the spectral representation method and the computational fluid dynamics method. Wind‐induced vibration of the tall building under Typhoon Kammuri was reanalyzed with generated wind force time history data. Finally, a time‐domain Monte Carlo simulation framework was proposed by integrating the modal identification and the stochastic wind force field generation technique. In this framework, the Metropolis–Hastings sampling algorithm was adopted to estimate the vibration exceedance probability, which was defined through a limit state performance function associated with the ISO vibration assessment criteria.

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Comfort assessment of high‐rise timber buildings exposed to wind‐induced vibrations

Lazzarini

Frison

Trutalli

et al. 2021

Structural Design Tall Build

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Summary The current trend of increasing the height limits of timber buildings makes wind‐induced vibrations a non‐negligible issue. The dynamics of high‐rise timber structures are discussed, focusing on accelerations and comfort assessment of the currently tallest timber building in the world, namely, the 18‐storey timber building in Norway. Verifications according to available standards were firstly carried out. Then, computational fluid dynamic analyses with Kratos Multiphysics were performed to simulate the wind flow around a rigid body. Afterward, the wind loads were applied to a single‐degree of freedom model and to a reduced finite element model, performing a one‐way coupling between the wind flow and the structure. Wind‐induced vibrations resulted particularly strong in the across‐wind direction, which is the most sensitive to the wind flow and the shape of the building. Provisions in international standards resulted to be not always enough to avoid discomfort in the occupants. Therefore, fluid dynamic analyses are suggested to simulate the actual response and verify the comfort criteria of tall timber buildings susceptible to wind‐induced vibrations.

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Study on occupant comfort evaluation mode of tall buildings in wind excitation based on fuzzy probability method

Cited by 6 publications

References 20 publications

Optimal Design of Mega‐Frame Core Wall Structures Equipped with Viscous Damped Outriggers for Human Comfort Performance under Wind Loading

Optimal Design of Mega‐Frame Core Wall Structures Equipped with Viscous Damped Outriggers for Human Comfort Performance under Wind Loading

Probabilistic assessment of vibration exceedance for a full‐scale tall building under typhoon conditions

Comfort assessment of high‐rise timber buildings exposed to wind‐induced vibrations

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