Science and Technology of Energetic Materials

Vol.74, No.6 (2013)

Research paper

A study on the load redistribution characteristics of RC structures through progressive collapse analysis
Hoon Park, Chul-Gi Suk, Young-Hun Ko, and Sang-Ho Cho


Progressive collapse is a phenomenon in which the local damage of structural members occurring due to abnormal load, such as impact or explosion, leads to the partial collapse or total collapse of the structure. Explosive demolition is a method of inducing the progressive collapse of a structure by removing the main structural members through blasting. Unlike progressive collapse, in explosive demolition the local damage of the structural members can be controlled at appropriate time intervals by blasting, to induce the progressive collapse of the structure and control the collapse behavior. Therefore, to induce the progressive collapse of an entire structure, it is important to select an appropriate time interval for the demolition of surrounding structural members according to the load redistribution of the structure. In this study, a progressive collapse analysis was carried out in order to consider and apply the load redistribution of structural members due to local damages to the explosive demolition design of the reinforced concrete structure. The occurrence of progressive collapse according to the number and position of column elements to remove was examined using ELS (Extreme Loading for Structures) software based on AEM (Applied Element Method). The vertical velocity and displacement of elements on top of the removed columns were compared, and the vertical internal force applied to the columns surrounding the removed column as a result of load redistribution was analyzed.

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progressive collapse, load redistribution, explosive demolition, appliecl element method, abnormal load

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