Development of Soundproof Plate Provided with Function of Wind Load Reduction

Abstract

Recently, it has been demanded for the railway companies to construct extremely high soundproof walls by such reason that many very high residences have been constructed along railway lines. However, the higher the soundproof wall is, the greater the load and moment acting on the walls by natural wind become, and it is hardly possible to install such extremely high soundproof wall without reinforcing the viaduct drastically. Therefore we have developed a new type of soundproof plate. One edge of the plate is equipped with a rotary axis and all or a part of the other three edges are fixed by a magnetic attracting force. Accordingly it has a high soundproof ability in the ordinary state; on the other hand, when the wind load amounts to a limit of keeping safety of the viaduct, the panel is opened and the wind load is reduced sufficiently. We have made clear the performance of the new plate by mechanical analysis and experiments.