Wind-induced dynamics and loads in a prismatic slender building: A modal approach based on unsteady pressure measurements

Rosa, Lorenzo Paolo; Tomasini, Gisella Marita; Zasso, Alberto; Aly, Aly Mousaad

doi:10.1016/j.jweia.2012.03.034

Cited by 32 publications

(24 citation statements)

References 32 publications

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“…The obtained CFD simulation provides a large amount of model flow data: velocity distributions, static and dynamic pressures, particle trajectory, age of the air, and other parameters. For example, the wind pressure coefficient for the enclosures allows differentiation between areas subjected to pressure and suction effects as a result of wind action and then obtaining their Pascal values [46,47]. Generally speaking, we consider pressure gradients between −0.03 and 11.64 Pa for windward enclosures and between −2.85 and −5.69 Pa for leeward (Table 4).…”

Section: Results In An Isolated Blockmentioning

confidence: 99%

Methodology Applied to the Evaluation of Natural Ventilation in Residential Building Retrofits: A Case Study

2017

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Abstract:The primary objective of this paper is to present the use of a steady model that is able to qualify and quantify available natural ventilation flows applied to the energy retrofitting of urban residential districts. In terms of air quality, natural ventilation presents more efficient solutions compared to active systems. This method combines numeric simulations, through the utilization of Ansys Fluent R15.0 ® and Engineering Equation Solver EES ® , with on-site pressurization tests. Testing consists of the application of the seasonal pressure gradient on the building's envelope and the calculation of the ventilation flows in three climatic representative conditions (summer, winter, and annual average). Through the implementation of this methodology to existing buildings it is possible to evaluate the influence of the built environment, as well as key parameters (relative height of the dwelling, number of vertical ventilation ducts, and airtightness of windows) of available natural ventilation.

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Section: Results In An Isolated Blockmentioning

confidence: 99%

Methodology Applied to the Evaluation of Natural Ventilation in Residential Building Retrofits: A Case Study

2017

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“…For example, Rosa et al (2012) measured the surface pressure of a 1:100 scale static rigid building model in the wind tunnel, and then applied numerical modal analysis to evaluate the dynamics of the building. The major difference from their study is that here wind loads are obtained via a "numerical wind tunnel" using purely CFD techniques.…”

Section: Aerodynamic Damping and Numerical Resultsmentioning

confidence: 99%

Predicting wind-induced vibrations of high-rise buildings using unsteady CFD and modal analysis

Zhang

Habashi

Khurram

2015

Journal of Wind Engineering and Industrial Aerodynamics

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“…Very often, for the presence of spire or for very spindly parts at the top, the total height reduction (Δℎ tot ) is observed in many constructions. The reduction of height is the difference between the top height ( ) and the height of the ultimate occupied floor ( In case of high geometrical slenderness [36], the classic problems due to the wind load could add up to those caused by dynamic effects, like the galloping due to the vortex shedding. In tall buildings, these effects are particularly dangerous since they concern the resistance of both the main structural elements and the elements supported by the main structure (e.g., the steel connections of the facades).…”

Section: Slenderness Ratiomentioning

confidence: 99%

“…Particularly, in this case, "Approach 1" is followed and the site directional velocities come out from an in-depth study of the location site [41]. The different velocities are reproduced in the wind tunnel on a rigid scale models (1 : 100) [36,42]. The tests have investigated two different layouts, with urban contest and without the urban contest.…”

Section: Wind Tunnel Testingmentioning

confidence: 99%

Structural Improvements for Tall Buildings under Wind Loads: Comparative Study

Longarini

Cabras

Zucca

et al. 2017

Shock and Vibration

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The behavior of a very slender building is investigated under wind loads, to satisfy both strength and serviceability (comfort) design criteria. To evaluate the wind effects, wind tunnel testing and structural analysis were conducted, by two different procedures: (i) Pressure Integration Method (PIM), with finite element modeling, and (ii) High Frequency Force Balance (HFFB) technique. The results from both approaches are compared with those obtained from Eurocode 1 and the Italian design codes, emphasizing the need to further deepen the understanding of problems related to wind actions on such type of structure with high geometrical slenderness. In order to reduce wind induced effects, structural and damping solutions are proposed and discussed in a comparative study. These solutions include (1) height reduction, (2) steel belts, (3) tuned mass damper, (4) viscous dampers, and (5) orientation change. Each solution is studied in detail, along with its advantages and limitations, and the reductions in the design loads and structural displacements and acceleration are quantified. The study shows the potential of damping enhancement in the building to mitigate vibrations and reduce design loads and hence provide an optimal balance among resilience, serviceability, and sustainability requirements.

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Wind-induced dynamics and loads in a prismatic slender building: A modal approach based on unsteady pressure measurements

Cited by 32 publications

References 32 publications

Methodology Applied to the Evaluation of Natural Ventilation in Residential Building Retrofits: A Case Study

Methodology Applied to the Evaluation of Natural Ventilation in Residential Building Retrofits: A Case Study

Predicting wind-induced vibrations of high-rise buildings using unsteady CFD and modal analysis

Structural Improvements for Tall Buildings under Wind Loads: Comparative Study

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