What is Wind Tunnel Testing?
Wind tunnel testing has a wide-range of purposes and fields for the application. Based on our comprehensive experience particularly in the field of architecture, the wind tunnel testing used in the area is outlined below.
Large scale buildings, such as taller skyscrapers are being erected by “people” one after another in our living environment. While they have made our lives convenient and comfortable, these large-scale constructions have some adverse impacts on the surrounding environment and vice versa.
Among the various environmental factors, “Wind” certainly has higher priority of significance these days. Although people can build large-scale buildings, the natural wind flow cannot be extinguished. We need to carefully design buildings so that they are in harmony with the wind.
Wind tunnel testing is one of the frequently used methods to evaluate the “harmonization between wind and buildings”.
A wind tunnel system consists of a tubular air passage and a fan/blower. The air flow generated by either fan or blower emulates natural wind after it passes through several filters. This wind reaches the test section where an experimental model of buildings and the surrounding city area and terrain is located. The phenomenon caused by the wind is recorded by the sensors embedded in the model. Measured data are analyzed, evaluated and used to mitigate the adverse impact on the environment.
What Wind Tunnel Tests Can Assess
Skyscrapers have a negative impact on the environment by generating gusty winds, known as “building winds”.
Building winds affect serious issues in recent years. They scatter dust, lift roofing tiles of neighboring houses, produce noise and disturb cyclists and pedestrians. The wind tunnel tests validate the possible impact of building winds generated by new skyscrapers, and also examine the effectiveness of the building designs and surrounding vegetation to reduce the impact of the winds. The tests are repeated over and over again using various conditions.
Wind Resistant Design
Wind loads on buildings depend on their size, height and locations. The data acquired in the wind tunnel tests can provide insight into the necessary structure of buildings and required strength for external walls.
Amenity and Livability
Wind may cause skyscrapers to vibrate. To ensure the amenity and livability of the buildings, various shaped models are used in wind tunnel testing to examine wind-induced vibration and frequency of the occurrence.
This experimental model examines the building winds caused by skyscrapers and the impacts on the surroundings. A complete set comes with a “planned building model” of the target building and a disk-shaped “surrounding model” 11simulating the immediate neighboring structures (buildings, landscape, vegetation, etc.).
Wind Pressure Model
This experimental model measures the wind pressure against the building walls and windows. The planned building model be used with or without a surrounding model similar to the environment model.
Wind Force Model
This experimental model determines the wind load applied to the entire building (measuring the load decomposed to 5-6 component forces). The data are used for structural designing. As with the wind pressure model, the model may be used with or without a surrounding model depending on the case scenarios.
This experimental model measures the swinging and vibration (dynamic response characteristics) of the building caused from the wind. As with the wind pressure model, the model may be used with or without a surrounding model.
This is a bridge model for the wind force and vibration experiment.
Other Experimental Models
|Name||Wind Engineering Center|
|Board of Directors||
Ko Nagata, President & CEO
Noriyoshi Sato, Managing Director
Takeshi Kato, Managing Director
Yoshihisa Tomita, Director
Satoshi Sano, Director(Engineering Div.)
Hideaki Kobayashi, Director(Modeling Div.)
Kentaro Aoshima, Director(Administration & Planning Div.)
Fumio Hiura, Auditor
Akira Takami, Senior Adviser
4-8-7 Sumida, Sumida-ku, Tokyo 131-0031, JAPAN
TEL +81 (0) 3-3610-6100
|Board of Directors||
1) Wind Tunnel Equipment and Peripherals;
2) Measurement Systems;
3) Maintenance/Renovation for Existing Wind Tunnels;
4) “Building and Geo Models” for Experimental-use;
|Shareholder||Global Sky Group|
|Major Banks||MUFG Bank, Ltd. / Sumitomo Mitsui Banking Corporation|