Numerical Simulation of Frame Structure Blasting Demolition under Explosive Loading

• Published in: Applied Mechanics and Materials Vol. 533; no. Modern Tendencies in Engineering Sciences; pp. 164 - 169
• Main Authors: Xie, Chun Ming, Yang, Jun, Zhao, Ming Sheng, Tao, Tie Jun, Chi, En An
• Format: Journal Article
• Language: English
• Published: Zurich Trans Tech Publications Ltd 01.02.2014
• Subjects: Blasting (explosive); Computer simulation; Concrete construction; Demolition; Explosions; Frame structures; Mathematical models; Reinforcing steels; Blasting Demolition; Explosive Loading; Frame Structure; Separate Common Node Model; Numerical Simulation
• ISBN: 9783038350453; 3038350451
• ISSN: 1660-9336; 1662-7482; 1662-7482
• DOI: 10.4028/www.scientific.net/AMM.533.164

In order to further improve the accuracy of the numerical simulation technology in buildings blasting demolition, numerical simulations on seven-story frame structure blasting demolition process were carried out adopting separate common node reinforced concrete model, and two simulation methods between the concrete elements on cut site directly removed and the concrete elements on cut site reserved with explosive loading applied instead were comparative analyzed. Simulation result indicates that, separate common node model can reflect mechanical properties difference of concrete and reinforcement through analysis on their loading process. There would be an upward impact force on the structure at the moment of detonating when the concrete elements on cut site were reserved with explosive loading applied instead, and it made the whole structure collapsed process extend about 0.5 s and structure touchdown vibration increase about 2.39 times. It had a negative impact on blasting vibration control, so the applied explosive blasting on cut site become a factor to be considered on the numerical simulation of structure blasting demolition. Studies suggest that the applied explosive blasting on the numerical simulation of structure blasting demolition can simulate the collapse process of building blasting demolition more real and will be an better aided design of structure blasting, and it has important engineering practical value.