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- W3185231267 abstract "Small-scale experiments were conducted using model steel bars as a fundamental investigation of the blasting demolition of steel construction. A numerical simulation was also conducted using steel bars cut with shaped charge by means of discontinuous deformation analysis (DDA). Iron columns with their height 25.5 cm were used as the model. The iron column models cut into three parts were fixed. Behavior of each member was observed by applying impact pressure from detonator. For the experiments, detonators fixed at four points were blasted using an initiation unit at the same time. The central member flew at 5.6 m/s in the horizontal direction, and parabolically in the vertical direction. Acceleration by the initiation was due to the impact pressure, and there was only a little influence of expanding gas. As a result of the numerical simulation, it was found that the central member flew out horizontally in the left without revolution, and the flying velocity was 5.8 m/s. The upper member moved upward with revolution. These results agreed well with those obtained from the model experiments. From the analysis of cutting angles of the model, it was found that members did not move in the case of zero degree cutting. From the analysis using a full-scale column, it was demonstrated that the column can be demolished with movement and collapse. 5 refs., 7 figs." @default.
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- W3185231267 date "1997-06-30" @default.
- W3185231267 modified "2023-09-27" @default.
- W3185231267 title "Study on the blasting demolition of steel construction. Part 1. Movement of the cutting part; Tekkotsu kozobutsu no bakuha kaitai ni kansuru kenkyu. 1. Tecchu buzai no kyodo ni tsuite" @default.
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