One consideration on the wind pressure load acting on the surface of mesh membrane structure. Comparison of experiment and analysis on a simple shape

Abstract

In this paper, we have obtained wind force coefficients acting on a membrane roof by the wind tunnel experiment technique and a numerical analysis technique for free-standing canopy with mesh membrane, and will show one consideration on an approach of the numerical analysis to get wind pressure distributions by comparing values of the wind force coefficients that obtained with these techniques. The roof type treated in the paper is a mono-sloped roof. The mesh membrane is porous on the surface, so air of the wind can go through it. This phenomenon affects the wind force coefficients, and this point is a characteristic of mesh membrane. Therefore, it is necessary to reflect this phenomenon on the surface of a model using in the wind tunnel experiment. For the reason, a coefficient on wind pressure loss of the mesh membrane to be called the loss coefficient was actually measured by an experiment, and was reflected the roof model. Furthermore, this loss coefficient was used at the analysis. The measurement experiment to obtain this pressure loss coefficient will be introduced also.