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Blast Modeling of Concrete Column Using PFC  

Choi Byung-Hee (한국지질자원연구원)
Yang Hyung-Sik (전남대학교)
Ryu Chang-Ha (한국지질자원연구원)
Publication Information
Explosives and Blasting / v.23, no.1, 2005 , pp. 47-54 More about this Journal
Abstract
An explosion modeling technique was developed by using the spherical discrete element code, $PFC^{3D}$, which can be used to model the dynamic stress wave propagation phenomenon. The modeling technique is simply based on an idea that the explosion pressure should be applied to a $PFC^{3D}$ particle assembly not in the form of an external force (body force), but in the form of a contact force (surface force). A test blast was conducted for a RC column, whose dimension was $600\times300\times1800$ in millimeters. The initial velocities of the surface movements were measured to be in the range of $14\~18\;m/s$ with the initiation times of $1.5\~2.0m$. Then the blasting procedure was simulated by using the modeling technique. The particle assembly representing the concrete was made of cement mortar and coarse aggregates, whose mirco-properties were obtained from the calibration processes. As a result, the modeling technique developed in this study made it possible for the burden to move with the velocity of $17\~24\;m/s$, which are slightly higher values compared to those of the test blast.
Keywords
폭원모델링;발파;콘크리트;
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