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Abstract
This paper was presented at CRREL's First International Conference on Snow Engineering. Snow depth on a large dome of 103m diameter and aobut 32m height was measured in Sapporo, where there is heavy snow accumulation. It was found that the mean snow depth on the entire roof area measured at 36 points was about 70% of the ground snow depth. The maximum snow depth measured on the roof was 120cm, which was about 1.4 times the ground snow depth. The ratio of the mean snow depth on the scoured half surface of the roof to the mean snow depth on the drifted half surface was 1:2. The most frequent wind direction, measured with a propeller-type anemometer on the roof, did not correspond to the direction inferred from the snow drift distribution. It was observed that a wind winth a velocity greater than about 5-6 m/s was effective in causing snow drift on the roof, when the mean air temperature during the referring period was about -4C. This measurement suggests that it is not adequate to predict the probable snow drift distribution on a roof immediately from the most frequent wind direction in the snowfall period.
This paper was presented at CRREL's First International Conference on Snow Engineering. Snow depth on a large dome of 103m diameter and aobut 32m height was measured in Sapporo, where there is heavy snow accumulation. It was found that the mean snow depth on the entire roof area measured at 36 points was about 70% of the ground snow depth. The maximum snow depth measured on the roof was 120cm, which was about 1.4 times the ground snow depth. The ratio of the mean snow depth on the scoured half surface of the roof to the mean snow depth on the drifted half surface was 1:2. The most frequent wind direction, measured with a propeller-type anemometer on the roof, did not correspond to the direction inferred from the snow drift distribution. It was observed that a wind winth a velocity greater than about 5-6 m/s was effective in causing snow drift on the roof, when the mean air temperature during the referring period was about -4C. This measurement suggests that it is not adequate to predict the probable snow drift distribution on a roof immediately from the most frequent wind direction in the snowfall period.
Date
7/1988
7/1988
Author(s)
S Sakurai; O Joh; T Shibata
S Sakurai; O Joh; T Shibata
Page(s)
51-58
51-58
Keyword(s)
snow load; depth; wind effect; snow distribution
snow load; depth; wind effect; snow distribution