Volume 53 (2012) Issue 3 Pages 180-185
It is generally difficult to install extremely high soundproof walls without drastic reinforcement of the viaduct because the higher the wall, the greater the wind load and moment. A new type of soundproof system was therefore developed. The proposed system comprises a clear soundproof plate and supporting frames. The top of soundproof plate is supported by a rotary axis and all or a part of the other three sides of the plate are fixed by magnetic attractive forces and offers high soundproof performance in ordinary conditions. When the wind load exceeds the safety limit for the viaduct, the plate opens and the appropriate wind load is released. A load test and wind tunnel test were conducted and the wind load reduction mechanism of the developed system was verified.