建物の周りの風圧分布の計算法 (その 5)

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In the foregoing four parts of the series, the problems of the stream with ordinary velocity around plates and buildings have been mainly dealt with to get the pressure distribution, etc., on the assumption that the separation starts at the edge or the corner of the wall surface. This time, however, the author tries to clarify the phenomena of the stream with low velocity around plates and squares, which are observed in the ventilation through the louver and underground-water, by means of two-dimensional potential theory, and confirm the regulation now in force about the wind pressure distribution. (1) The considerably wide range of negative pressure near the edge as shown in Fig. 6 and Fig. 11 can only exist in the slow stream without separation, but in ordinary wind, separation starts at the edge and makes the range of negative pressure narrower, which moreover depends upon the wind direction. (2) The comparison between Fig. 7 and Fig. 8 makes us understand that the longer the eaves, the more uniform the pressure distribution between the roof and the ground becomes, that is, the remarkable effects of end plates. (3) When two tall buildings of square plan type stand in line as the plates of Fig. 12, the pressure distribution on the front surface are not so much affected by their proximity except the slight shift of the stagnation point toward the gap, while the negative pressure on the side wall of the gap tends to increase remarkably, so that caution must be paid to the strength calculation of sashes and window-panes on this side.
社団法人日本建築学会の論文
1968-12-30

建物の周りの風圧分布の計算法 (その 5)

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