軒下空間から見た雨の落水表情の印象評価を規定する要因
2020 年 85 巻 775 号 p. 1909-1919
詳細
2020 年 85 巻 775 号 p. 1909-1919
When creating sustainable architecture according to the climate and region, it is important to account for and design various falling water patterns. However, no study has quantitatively examined people’s impressions of various falling rainwater patterns when viewed from inside and outside of eaves. In this study, we quantitatively evaluated the texture and impressions of people experiencing water falling from the front of eaves as they looked out at the external space.
In this study, experiments were conducted by using a rainfall simulation system, and a four-factor experimental design was implemented, after the form of falling water was observed in the field survey. Four levels of rainfall were determined; that is, 4.9 mm/h (normal rain), 16.0 mm/h (slightly heavy rain), 22.9 mm/h (strong rain), and 41.1 mm/h (heavy rain). In addition, two levels were set for the surrounding environmental background (achromatic and chromatic), two values of the eaves heights were set (2.0 m and 2.5 m), and two levels of roof slope (1 and 4) were employed. A total of 32 spaces with these combinations were then used as stimuli in the experiments, and the total experimental time was approximately 2 h. The experimental period was from November 27 to December 17, 2018, and the subjects comprised 30 students (21 males, 9 females) in their 20s from the Ibaraki University.
The main findings obtained from the four-way analysis of variance are listed below.
1) People’s impressions for the texture pf falling rainwater when viewed a space under an eave were constructed by the sense of aesthetic, brightness and calmness.
2) The various appearances of raindrops falling in a small amount of grain against a chromatic background had a positive impact on the sense of aesthetic, brightness, intimacy, and calmness. The position where the dripping occurred and the water path (Position) were fixed regularly (R), and the water fell intermittently (In); moreover, the shape of the dripping rain (Shape) was granular (G), and the behavior of dripping (Behavior) was vertical (V).
3) The recognizability of the raindrop falling close to the viewing field had a positive effect on the sense of intimacy and calmness.
4) The slow fall of raindrops due to the loose roof slope had a positive effect on the sense of brightness and intimacy.
