Wind Engineers, JAWE

Winds in the Engineering Field

Tatsuo HANAFUSA

1984 Volume 1984 Issue 20 Pages 1-31
Published: June 15, 1984
Released on J-STAGE: September 28, 2010

DOIhttps://doi.org/10.5359/jawe.1984.20_1

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This paper describes some points of wind characteristics in the engineering field and some feature of wind data obtained in routine work at each meteorological station. The characteristics of high winds in the boundary layer are examined by using the data from 213 m meteorological observation tower at Tsukuba Science City. The time and spatial variations of mean, variance, auto-correlation of wind components, and cross correlation between two wind components and power spectra of winds are discussed in this paper.

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Wind tunnel modeling for flow around buildings

Tatsuo MUROTA

1984 Volume 1984 Issue 20 Pages 33-49
Published: June 15, 1984
Released on J-STAGE: September 28, 2010

DOIhttps://doi.org/10.5359/jawe.1984.20_33

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A cooperative research project on wind tunnel modeling for flow around buildings was carried out by Building Research Institute and Building Center of Japan from 1981 to 1984.24research organizations in Japan joined the project.
A large amount of wind tunnel tests were conducted for three types of flaw around 1) high-rise buildings, 2) a14-storied building and 3) a7-storied building. The test data were compared with field observation data obtained around the three buildings stated above. Based on this, effects of several parameters, i.e., wind profile of approaching flow, height of boundary layer, modeling area of surrounding city, surface roughness of model buildings, etc., on the similarity of wind tunnel tests were studied.
This paper described the major results of this project.

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Numerical Simulation for Turbulent Flow concerned with Wind Engineering

Shuzo MURAKAMI

1984 Volume 1984 Issue 20 Pages 51-79
Published: June 15, 1984
Released on J-STAGE: September 28, 2010

DOIhttps://doi.org/10.5359/jawe.1984.20_51

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The techniques for the numerical simulation of the turbulent flow have been developed greatly in these ten years. Recently these techniques are often applied to the problems concerned with the wind engineering.But the numerical s imulation is not a so simple method for the prediction.It may give wrong and dangerous results, if the method for the application is rat correct.For example, it often gives greatly different tesults according to the types of the boundary conditions used, although the came simulation model is applied.
Here, the types of the turbulence closure models are described at first. Next, the results of the simulation for the air flow around a building are shown, in which two types of the simulation model are used;1) k-ε2-equation model, 2) large eddy simulation.
The results of the simulation are compared with those of the wind tunnel experiment, and it is confirmed that the results of the careful simulation are very similar to the results of the experiment.Lastly the influences of the boundary conditions on the simulation results are described.

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Review of Various Mechanical Means Suppressing Wind-Induced Vibration of Structures

Matsuo TSUJI

1984 Volume 1984 Issue 20 Pages 81-102
Published: June 15, 1984
Released on J-STAGE: September 28, 2010

DOIhttps://doi.org/10.5359/jawe.1984.20_81

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A variety of means for suppressing wind-induced vibration of structures could be divided into aerodynamic means and mechanical ones.Out of these two means, the latter is dis-cussed in this paper.First, various mechanical means for suppressing wind-induced vibration are classified as follows;
A. augumentation of stiffness
B. addition of mass
C. augmentation of damping, No.1 untuned type
D.augmentation of damping, No.2 tuned type
E. application of control force
Each vibration-suppressing means classified above is discussed one by one making up a list of proposed ideas and actually applied cases.Finally, the design procedure and things to be considered are described in the case of the planning of these mechanical means for suppressing wind-induced vibration.

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On Physical Mechanism of Vortex-induced Oscillation and its Response Evaluation

Naruhito SHIRAISHI, Masaru MATSUMOTO

1984 Volume 1984 Issue 20 Pages 103-127
Published: June 15, 1984
Released on J-STAGE: September 28, 2010

DOIhttps://doi.org/10.5359/jawe.1984.20_103

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In order to clarify the physical mechanism of vortex-induced oscilfations of bluff sections, a survey on recent investigations was performed and some fundamental characteristics of vortices induced around body are classified based on their generation mechanisms. Stresses are particularly placed on the in-line and cross flow oscillations and also on such enhsncement factors of vortex-induced oscillations as flow impingement, wall jet, acoustic stimulation and pulsating flow.

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On the Wind-Induced Vibrations of Structural Cables

Yasuharu NAKAMURA, Yukichi SAKAMOTO

1984 Volume 1984 Issue 20 Pages 129-140
Published: June 15, 1984
Released on J-STAGE: September 28, 2010

DOIhttps://doi.org/10.5359/jawe.1984.20_129

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This paper reviews the state of the art In the wind-induced vibrations of structural cables.
Particular emphasis is placed on the vibrations of electric power line conductors.
Brief mention is also made of the vibrations of cables of bridges and marine structures.

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[title in Japanese]

1984 Volume 1984 Issue 20 Pages 141-144
Published: June 15, 1984
Released on J-STAGE: September 28, 2010

DOIhttps://doi.org/10.5359/jawe.1984.20_141

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