Aerodynamic measurements of across-wind loads and responses of tapered super high-rise buildings

Deng, Tao; Yu, Xianfeng; Xie, Zhong

doi:10.12989/was.2015.21.3.331

Cited by 25 publications

(20 citation statements)

References 16 publications

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“…It was found that the tapered forms show better aerodynamic performance compared to the square section. Deng et al (2015) performed wind tunnel tests on supertall buildings with tapering ratios of 2.2%, 4.4%, and 6.6%. Their results showed that the global strategy of tapered elevation resulted in reduced aerodynamic loads and responses to the wind.…”

Section: Introductionmentioning

confidence: 99%

Use of aerodynamically favorable tapered form in contemporary supertall buildings

Ilgın

2022

DRArch

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Today, supertall buildings can be constructed in unusual forms as a pragmatic reflection of advances in construction techniques and engineering technologies, together with advanced computational design tools for architectural design. As with many other buildings, architectural and practical principles play a crucial role in the form of a supertall building, where aerodynamic behavior shaped by wind-induced excitations also becomes a critical design input. Various methods are used to meet the functional needs of these towers and reduce excitations, including aerodynamic modification methods directly related to the building form. Tapered forms are one of the most frequently used and most effective methods in today's skyscrapers, which significantly affect architectural design. To date, no study has been conducted in the literature that provides an understanding of the interrelationships between tapered building forms and main planning criteria, considering the aerodynamic design concerns of the tapering effect in supertall buildings (≥300 m). This important issue is explored in this article with data gathered from 41 supertall case studies, considering location, function, structural system, and structural material as well as the aerodynamic taper effect. The main findings of the study highlighted the following: (1) Asia was where tapered towers were most favored, with a wider margin in all regions; (2) mixed-use was the most preferred function in selected supertall buildings with tapered form; (3) outriggered frame systems were mainly used; (4) tapered supertall cases were mostly built in composite; (5) the sample group included 17 cases that used the tapering effect with aerodynamic design concerns, some of which were accompanied by corner modifications. It is believed that this study will be a basic guide for design and construction professionals including architectural and structural designers, and contractors.

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Section: Introductionmentioning

confidence: 99%

Use of aerodynamically favorable tapered form in contemporary supertall buildings

Ilgın

2022

DRArch

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“…Tamura et al (2010) have explored the aerodynamic force and pressures acting on 31 tall building model with various configurations like rectangular, square, elliptical, with corner modification, with setbacks, helical, with opening and so on. Deng et al, (2015) investigated the effect of global and local strategies such as chamfered modification, opening slots on aerodynamic forces and wind induced responses by a series of wind tunnel tests which were conducted on tapered super tall building with square cross section by applying simultaneous pressure measurement technology. Li and Li (2016) have developed the optimal design model of an L shaped building using Kuhn -tucker conditions and validated the model with wind tunnel test results.…”

Section: Introductionmentioning

confidence: 99%

Effect of Aerodynamic Modification on ‘V’ plan Shaped Tall Building Under Wind Excitation

Bhattacharya

Dalui

2022

ASPS Conf. Proc.

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Advanced high-rise buildings with peculiar cross-sectional plan is the major challenging concern to all structural engineers as well as researchers due to variation in dynamic wind response. Irregular shaped tall buildings are vulnerable to wind force due to height and nonuniformity of the structure. In the present study, the principal objective is to investigate the significant role of the aerodynamic modification of the building model to reduce the aerodynamic effect of wind force on ‘V’ plan shaped high-rise building and to modify aerodynamic design criteria accordingly. Various cases have been made by considering different local modification like corner chamfered and corner rounded of ‘V’ plan shaped building model. The angle between the limbs is 90° which remain unchanged. The percentage is gradually increased from 5% to 20% of the total plan area with 5% regular increment for both chamfered and rounded corner. Wind incident angle is increased from 0° to 90° with 30° regular interval for each case. Computational Fluid Dynamics (CFD) is the basis of method to perform the numerical simulation of ‘V’ plan shaped building with local modifications such as corner chamfered, corner rounded which is similar wind environment as in urban terrain. Grid convergence study is performed to improve the accuracy of result by adopting very finer meshing of Computational Domain. Pressure coefficient of each face, force coefficient, velocity variation, pressure variation on each face is obtained by numerical analysis. Further, a comparison has been made with basic ‘V’ plan shaped tall building model without any modification to study the effectiveness of aerodynamic modification on wind-induced response of ‘V’ plan shaped building exposed to different wind incidence angle and observations have been made on the suitability of aerodynamic modification based on the numerical result.

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“…This kind of building is a typical wind-sensitive structure (Xu et al, 2015). The vibration deformation of super-high-rise buildings under wind load will inevitably cause the vibration deformation of an elevator guide rail installed in a superhigh-rise building (Deng et al, 2015;Feng et al, 2012;Zhi et al, 2017). The vibration deformation of the guide rail is transmitted to the car through the guide shoe, and the vibration response of the car can also act on the guide rail through the guide shoe.…”

Section: Introductionmentioning

confidence: 99%

Horizontal vibration response analysis of ultra-high-speed elevators by considering the effect of wind load on buildings

2021

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Abstract. At present, the wind-induced vibration effects of super-high-rise buildings caused by wind loads can no longer be ignored. The wind-induced vibration effect of super-high-rise buildings will inevitably cause the vibration of ultra-high-speed elevators. However, for the study of the vibration characteristics of ultra-high-speed elevators, the wind-induced vibration effect of the ultra-high-speed elevator is often ignored. Based on Bernoulli–Euler theory, the forced vibration differential equation of elevator guide rail was established, and the vibration equation of elevator guide shoe and car was established by using the Darren Bell principle. The coupled vibration model of the guide rail, guide shoes, and car can be obtained through the relationship of force and relative displacement among these components. Based on the model, the effects of wind pressure and building height on the horizontal vibration of the ultra-high-speed guideway and passenger comfort were analyzed. The results showed that the influence of the wind load on the vibration of ultra-high-speed elevator can no longer be disregarded, and the maximum horizontal vibration acceleration of the guide rail is positively correlated with the height of building. The vibration acceleration of the same height rail increases with the increase in wind pressure. The vibration dose values (VDVs) increase with the increase in wind pressure and building height, respectively.

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Aerodynamic measurements of across-wind loads and responses of tapered super high-rise buildings

Cited by 25 publications

References 16 publications

Use of aerodynamically favorable tapered form in contemporary supertall buildings

Use of aerodynamically favorable tapered form in contemporary supertall buildings

Effect of Aerodynamic Modification on ‘V’ plan Shaped Tall Building Under Wind Excitation

Horizontal vibration response analysis of ultra-high-speed elevators by considering the effect of wind load on buildings

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