網状構造物の抗力係数に関する研究 : 2次元網状板の抗力係数

概要

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Reticulated structures are often used for buildings. However, such structures are very sensitive to effects of wind, and accordingly they have been subjected to considerable damage caused by wind. This paper elucidates the relationship between resistant coefficients and solidity ratios of screens actually used for buildings, and also describes the characteristics of the drag coefficient of two-dimensional reticulate plates that were made from the screens employed for the study. Resistant coefficients of the test screens were measured by using a vertically-placed water tube. It was proved that the resistant coefficient K of the screen can be estimated by an equation, K = 1.2S/(1-S)^2, which is based on the solidity ratio S. Wind-tunnel tests were performed to measure the drag force acting on the two-dimensional reticulate plates in a uniform airflow. The drag coefficient C_D of the two-dimensional reticulate plates in a case of S > 0.3 can be estimated by substituting K = 1.2S/(1-S)^2 into an empirical equation that expresses the relationship between C_D and K.
社団法人日本建築学会の論文
1999-10-30