scholarly journals DEVELOPMENT OF CFD METHOD FOR PREDICTING WIND ENVIRONMENT AROUND A HIGH-RISE BUILDING : Part2 : The cross comparison of CFD results using various k-ε models for the flowfield around a building model with 4:4:1 shape(Environmental Engineering)

2003 ◽  
Vol 9 (18) ◽  
pp. 169-174 ◽  
Author(s):  
Taichi SHIRASAWA ◽  
Yoshihide TOMINAGA ◽  
Ryuichiro YOSHIE ◽  
Akashi MOCHIDA ◽  
Hiroshi YOSHINO ◽  
...  
Keyword(s):  
Environmental Engineering ◽  
Wind Environment ◽  
Building Model ◽  
High Rise ◽  
High Rise Building ◽  
The Cross ◽  
Cfd Method

Earthquake induced floor accelerations on a high-rise building: Scale model tests on a shaking table

2021 ◽  
Author(s):  
Fabio Rizzo ◽  
Alessandro Pagliaroli ◽  
Giuseppe Maddaloni ◽  
Antonio Occhiuzzi ◽  
Andrea Prota
Keyword(s):  
Soil Structure ◽  
Shaking Table ◽  
Soil Structure Interaction ◽  
Scale Model ◽  
Structural Elements ◽  
Shaking Table Tests ◽  
Building Model ◽  
High Rise ◽  
High Rise Building ◽  
Story Building

<p>The paper discusses results of shaking table tests on an in-scale high-rise building model. The purpose was to calibrate a dynamic numerical model for multi-hazard analyses to investigate the effects of floor acceleration. Accelerations, because of vibration of non-structural elements, affect both the comfort and safety of people. The research investigates the acceleration effects of both seismic and wind forces on an aeroelastic in-scale model of a multi-story building. The paper discusses the first phase of experiments and gives results of floor accelerations induced by several different base seismic impulses. Structural analyses were first performed on the full-scale prototype to take soil-structure interaction into account. Subsequently the scale model was designed through aeroelastic scale laws. Shaking table experiments were then carried out under different base accelerations. The response of the model and, in particular, amplification of effects from base to top are discussed.</p>

scholarly journals Wind tunnel tests of aerodynamic interference of the high-rise building and its nearest city surroundings

2013 ◽  
Vol 12 (2) ◽  
pp. 079-086
Author(s):  
Grzegorz Bosak
Keyword(s):  
Wind Tunnel ◽  
Building Design ◽  
Wind Pressure ◽  
Horizontal Wind ◽  
Wind Tunnel Tests ◽  
Wind Action ◽  
Building Model ◽  
High Rise ◽  
High Rise Building ◽  
Aerodynamic Interference

The paper summarizes the results of wind tunnel tests of the influence of aerodynamic interference on wind action of a high-rise building design in Warsaw. Measurements were accomplished in Wind Engineering Laboratory of Cracow University of Technology. Wind pressures on external surfaces of the building model were acquired in two different situations. Firstly, only the building model was placed in the tunnel working section, secondly, the building model with the nearest surroundings was taken under consideration. A study of the character of wind action differences caused by the nearest surroundings of the building was the main aim of the paper. Wind pressure coefficients on the external building surfaces and the difference of horizontal wind action on full scale were compared.

scholarly journals Effects of Inflow Condition on RANS and LES Predictions of the Flow around a High-Rise Building

Fluids ◽  
2020 ◽  
Vol 5 (4) ◽  
pp. 233
Author(s):  
Giulio Vita ◽  
Simone Salvadori ◽  
Daniela Anna Misul ◽  
Hassan Hemida
Keyword(s):  
Navier Stokes ◽  
Ambient Conditions ◽  
Engineering Applications ◽  
Building Model ◽  
High Rise ◽  
High Rise Building ◽  
Eddy Simulation ◽  
Turbulent Inflow ◽  
Flow Features ◽  
Inflow Condition

An increasing number of engineering applications require accurate predictions of the flow around buildings to guarantee performance and safety. This paper investigates the effects of variations in the turbulent inflow, as predicted in different numerical simulations, on the flow pattern prediction around buildings, compared to wind tunnel tests. Turbulence characteristics were assessed at several locations around a model square high-rise building, namely, above the roof region, at the pedestrian level, and in the wake. Both Reynolds-averaged Navier–Stokes (RANS, where turbulence is fully modelled) equations and large-eddy simulation (LES, where turbulence is partially resolved) were used to model an experimental setup providing validation for the roof region. The performances of both techniques were compared in ability to predict the flow features. It was found that RANS provides reliable results in regions of the flow heavily influenced by the building model, and it is unreliable where the flow is influenced by ambient conditions. In contrast, LES is generally reliable, provided that a suitable turbulent inflow is included in the simulation. RANS also benefits when a turbulent inflow is provided in simulations. In general, LES should be the methodology of choice if engineering applications are involved with the highly separated and turbulent flow features around the building, and RANS provides reliable information when regions of high wind speed and low turbulence are investigated.

Investigating wintertime pedestrian wind environment and user perception in dense residential neighbourhood in a city of hot-summer and cold-winter climate zone, China

2016 ◽  
Vol 26 (3) ◽  
pp. 392-408 ◽  
Author(s):  
Feng Yang
Keyword(s):  
Questionnaire Survey ◽  
Reference Station ◽  
Cold Winter ◽  
Wind Environment ◽  
Winter Climate ◽  
Climate Zone ◽  
Housing Design ◽  
High Rise ◽  
High Rise Building ◽  
Building Layout

Urban wind environment could have an impact on pedestrian’s comfort and safety, as well as pollution dispersion and building energy consumption. For cities in the hot-summer and cold-winter climate zone of China, a proper design residential neighbourhoods is important to facilitate urban ventilation in hot and transient seasons and to protect users from strong winds in cold season. This paper reports the results of field measurements and a questionnaire survey in a large residential development with three different types of housings. Micrometeorology measurement was carried out at the pedestrian height level as well as at a rooftop reference station. Pedestrians’ subjective perception on wind and thermal comfort was recorded through a guided interview and questionnaire survey during the measurement. The measured wind velocity ratio is highest in the long-linear high-rise building layout, and is the lowest in the mid-rise linear building layout. Eight-seven per cent of respondents felt fairly comfortable living in the long-linear high-rise building layout, only 7% less than the mid-rise building layout. For similar housing forms in Shanghai, the wintertime wind shelter may not be critical compared with summertime ventilation requirement, and that the site planning and housing design should focus mainly on summertime wind channelling.

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