Design criteria for the folding implosion of high-rise RC buildings. (15th April 2021)

• Record Type: Journal Article
• Authors: Sun, Jinshan; Jia, Yongsheng; Xie, Xianqi; Yao, Yingkang
• Is Part Of: Engineering structures. Volume 233(2021)
• Publication Date: 2021-04-15
• Subjects: Demolition blasting -- High-rise building -- Reinforced concrete -- Folding implosion -- Designcriteria; Structural engineering -- Periodicals; Structural analysis (Engineering) -- Periodicals; Construction, Technique de la -- Périodiques; Génie parasismique -- Périodiques; Pression du vent -- Périodiques; Earthquake engineering; Structural engineering; Wind-pressure; Periodicals; 624.105
• DOI: 10.1016/j.engstruct.2021.111933
• Languages: English
• ISSNs: 0141-0296

Abstract

Highlights: A new folding implosion method for demolishing high-rise RC buildings is developed. Some design criteria for the folding implosion method are proposed. The folding implosion method expands and supplements the building implosion technology. Abstract: Blasting is an efficient method for demolishing high-rise buildings and structures. If the collapse scope of a building to be blasted is insufficient controlled building implosion technology is preferred. However, for the conventional implosion, there is a lot of pre-weakening work that has to be done, and it is almost impossible to demolish the high-rise thin wall structures such as reinforced concrete (RC) chimneys. Therefore, a folding implosion method is proposed. In this method, several wedge-shaped notches should be blasted out in the high-rise building or structure, then these notches will turn to "plastic hinges", meanwhile, the building or structure will turn to a folding kinematic chain, and the segments will overlap each other after falling down. For this method, some design criteria for the main parameters such as the position, initiation sequence, and initiation time delay of blast notches are proposed. The multi-body dynamics models for bi-folding implosion and tri-folding implosion are deduced to analyze the folding motions and rationality of the blasting plans. In two implosion cases, the design criteria and kinematics models are validated.