著者

石川 廣三

出版者

一般社団法人 日本風工学会

雑誌

日本風工学会誌 (ISSN:09121935)

巻号頁・発行日

vol.42, no.3, pp.227-236, 2017-07-31 (Released:2018-03-21)

参考文献数

12

著者

石川 廣三 橋本 佳大

出版者

日本建築学会

雑誌

日本建築学会構造系論文集 (ISSN:13404202)

巻号頁・発行日

vol.72, no.611, pp.13-20, 2007

被引用文献数

2

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Although the behavior of rain drops near the surface of a building in driving rain are quite complicated according to the sizes of the drops and the air flow pattern around the building, a general relationship exists between average impinging angle of raindrops against the wall surface and the wind velocity that accompanies the rain. It can be of great value in estimating wetting characteristics of those walls, if we can express the relation in a simple equation. Shapes and sizes of stained areas that are left just below projections over a wall offer valuable information for the maximum impinging angle of raindrops against the wall. From the analysis of wind speed records during the rains which could have caused the stain patterns, certain range of constant C_<im> for the impinging angle-wind velocity equation was obtained.

著者

石川 廣三

出版者

日本建築学会

雑誌

日本建築学会構造系論文集 (ISSN:13404202)

巻号頁・発行日

vol.71, no.610, pp.21-27, 2006

被引用文献数

1 1

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Cracks are common causes for rain penetration through external walls. Little is known, however, on rainwater leakage liability of fine cracks in which water absorption of the wall materials play an important role on the penetration process. In this paper, the author introduces an equation for calculating the leakage occurrence time as an function of crack width, wall thickness, pressure difference, and water absorption rate coefficient of the wall material. Results of two series of experiments on water permeability of various cracks in mortar and concrete specimen are also described. From the experiments, values for the factors concerning crack shapes and the wall material needed for applying the above equation are obtained. The range of crack width for which leakage were not observed in the experiments corresponded the crack width range below which the calculated leakage occurrence time shows remarkable increase.