Analysis of Load Distribution Effect of Jack Support Shock Absorber

According to recent statistics from the Ministry of Land, Infrastructure and Transport, 40% of domestic buildings are in a serious state of deterioration and are more than 30 years old. Accordingly, the dismantling of old buildings is increasing; however, collapse accidents frequently occur during dismantling. During building dismantling, a jack support is placed at the bottom of the slab to reinforce insufficient slab strength. In this study, a shock absorber was developed to address jack support problems. The developed impact dampening device was designed to be mounted at the bottom of the jack support. Therefore, not only could the length of the jack support be adjusted independently, but it could also be applied to various load environments owing to its three-stage shock absorbing device configuration. Consequently, applying the developed shock absorber to various building dismantling scenarios and confirming it through a numerical analysis showed a relatively excellent load distribution effect when applied to all supports.