骨組構造の爆破解体解析・実験システムの開発

抄録

A controlled explosion technique using high explosives has been developed in recent years. Although the blast demolition technique increases work efficiency, it poses a high risk of damaging neighboring buildings, especially in urban areas. It also requires high levels of knowledge and experience, which are very difficult for general engineers to master. To familiarize the demolition technique among engineers, numerical assumptions using computational analysis in devising the blast demolition have become essential in ensuring the success of this technique. One of the objectives of this study is to perform some blast demolition analyses of framed structures using a dynamic finite element code, whose validity against impact collapse problems of large-scale structures has recently been developed and verified. Another objective of this study is to develop a mimic demolition experimental system that uses magnetic devices to express member fracture caused by explosion. The magnetic field of the devices is controlled by a blast interval controller and power switches, which control the binding of each connection in the framed structure. The experimental system does not use explosives or any such dangerous substances, and multicycle use is possible. An experiment is carried out to compare quantitatively with the numerical result.