Computer Simulation For Collapsing Course Of Reinforced Concrete Structure With Controlled Blasting

This paper summarizes the status of research and engineering of controlling blasting demolition of the reinforced concrete structure. The mathematics model of blasting cut dimension of the reinforced concrete structure is established. The effect of collapse of the structure caused by cut shapes is discussed. At the base of analysis of the mechanics process of collapse of the reinforced concrete structure, the dynamics model of collapse of structure is established and mechanic mechanism of forward rush and backlash in the process of collapse of structure is analyzed.This paper summarizes the flow of foundation of FEM model. the collapses of reinforced frame structures are analyzed using LS-DYNA code. The effect of collapse of silo structures caused by different demolition height parameters,pretreatment methods and places of cutting reinforcing steel bars is discussed; The process of blasting cut using micro-delay demolition is simulated by the function of life and death of element; Using separate model of common nodes, the destroy process of columniations of reinforced concrete is simulated. The effect of reinforcing steel bars is also simulated. Finally, the collapse process of a reinforced concrete frame structure using in-situ destruction is simulated and the result is the same as the local situation.The innovation of the paper is the simulation of collapse of reinforced concrete structures using separate model of common nodes. This paper's production can help us choose appropriate collapse mode,micro-delay time and demolition height.