건물벽면 연직그림자 형성에 의한 일조장애 평가

Abstract

In this study, the blocking effect of building shadows on sunshine environments was assessed for the new construction of high-rise buildings, using a numerical model of sunshine duration. Three-dimensional surface boundary of buildings in the target area was numerically constructed, based on the geographic information system (GIS) data. The solar positions and the shadow areas were calculated for the target area on spring equinox, summer solstice, autumn equinox and winter solstice in 2019. The azimuth and altitude angles of the sun calculated in this study were compared with the data provided by Korea astronomy and space science institute (KASI), and evaluated as the root mean square errors (RMSE) below 0.3° and the correlation 0.999. The gross shadow area in the target area was estimated as the increase rate of 48.6% ~ 87.6% by the construction of new buildings. The blocking effect of vertical building shadows on sunshine duration was assessed for the apartment complex located adjacent to the construction site of new buildings, by considering the legal limit of sunshine duration. The layers less than the eighth floor were not satiated with 4-hours of the total sunshine duration during the time from 08 to 16 on winter solstice. The layers less than the sixth floor were not satiated with 2-hours of the continuous sunshine duration during the time from 09 to 15 on winter solstice.