Scientific Development of Explosive Demolition and Multibody—discretebody Dynamics

The multi-discrete body dynamics was new scientific idea in explosive demolition. The building explosive demolition was described. The dynamics behavior of building toppling down and multi-discrete body dynamics was defined. The dynamic characteristic was different from traditional multi-body system. The dynamic equations and the representative equations of demolition were erected and enumerated,finally the approximate solutions were put forward. The dynamic equations comparability and applications of complete dimensionless were given. The complete chessboard emulating of variable topological multi-discrete body dynamics were performed. The parameters of material mechanics and impact dynamics of concrete component concerning the equation computing were clarified. With the multi-body dynamics,the demolition model was simply educed such as the dimensionless expression of cutting size,shape of muck pile,back and down sitting,firing order and delay time of collapse types of different buildings. In order to choose reasonable collapse scheme,demolition measurements and cutting parameters,the comprehensive theory and simple practical were provided and exact control of demolition by blasting was considered.