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An Experimental Study on Blasting Collapse Behavior of Asymmetry Structure with High Aspect Ratio  

Song, Young-Suk ((주)한화 사업개발팀)
Jung, Min-Su ((주)한화 사업개발팀)
Jung, Dong-Wol ((주)오비피이엔지)
Hur, Won-Ho ((주)오비피이엔지)
Publication Information
Explosives and Blasting / v.31, no.1, 2013 , pp. 1-10 More about this Journal
Abstract
In blasting demolition, a method would be chosen among many depends on shape and system of a structure and its surround. To demolish using explosives a structure, which is asymmetric and with high aspect ratio, pre-weakening, explosive locations, detonating delay, and surround conditions are needed to be considered in front to design blasting demolition plan. In this study, to over turn asymmetric and high aspect ratio structure in safe, a simulation using a software named Extreme Loadings for Structures, ELS, had performed. In results, it is achieved optimized pre-weakening shapes and locations, which prevent kick back motion of the structure when it collapse, by analyzing moment distribution caused by pre-weakening. And of structural collapse and by minimizing asymmetric structure's torsional moment. Also, after the demolition, simulation results are also compared with actual collapse behavior. In results, it is confirmed the accuracy of collapse behaviour simulation results, and in blasting demolition, kick back motion can be controled by adjusting pre-weakening shape and location, and the torsional moment of an asymmetric structure also can be solved by optimizing detonation locations and its time intervals.
Keywords
Blasting demolition; Asymmetry structure with high aspect ratio; ELS; Collapse behavior; Over turn; Optimized design;
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  • Reference
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