Numerical Simulation of Frame Structure Blasting Demolition under Explosive Loading

Abstract:

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.

• Periodical: Applied Mechanics and Materials (Volume 533)
• Pages: 164-169
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.533.164
• Online since: February 2014
• Authors: Chun Ming Xie, Tie Jun Tao, En An Chi, Jun Yang, Ming Sheng Zhao
• Keywords: Blasting Demolition, Explosive Loading, Frame Structure, Numerical Simulation, Separate Common Node Model

References

[1] Yang Zhi. Analysis Method Summarize of Tall Building [J]. Shi Chuan Structure Material, 2006, 5.

[2] Xu Pei. Finite Element Simulation Study on Blasting Demolition Process of Reinforced Concrete Structure[D]. Bei Jing: Beijing Institute of Technology, (2006).

[3] Yang Guo-liang. Numerical Simulation Study on Blasting Demolition of Reinforced Concrete Architectural Structure[D]. Bei Jing: Beijing Institute of Technology, (2009).

[4] Yan Zhi-xin, Liu Long-quan, Liu Pei-lin, et al. Simulation Research on Separate Model of Framed Structure Explosive Demolition[J]. Blasting, 2011（03）: 1-3.

[5] ANSYS Corporation China Agent. ANSYS/ LS-DYNA Manual [M]. (2002).