SECTIONAL COMPOSITION AND LIGHT ENVIRONMENT IN WINTER OF THE COURTYARD AND ADJACENT ROOMS IN CONTEMPORARY JAPANESE COURTYARD HOUSES

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  • 現代日本のコートハウスにおける中庭まわりの断面構成と冬期の光環境

Abstract

The aim of this study is to clarify the relationship between spatial composition and light environment in contemporary Japanese courtyard houses. Firstly, sectional forms of courtyards, such as the height of enclosures, the ratio of windows to walls and the finishes of their surfaces, are analyzed. These spatial elements are considered to have various effects on the characteristics of daylighting by courtyards. Secondly, light environment in the courtyard and adjacent rooms are analyzed by the measure of brightness based on simulation. The combinations of brightness and its transition during a winter day are classified into seven patterns. Finally, eight types of sectional composition and light environment in winter are suggested. Furthermore, the relationships among these types are defined by sets of three different contrasts of "space," "light" and "time." Prevalent types show a common feature that they have all of the combinations of three contrastive characteristics, such as "open or close," "homogeneous or heterogeneous," and "variable or invariable."

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