爆破2025，Vol.42Issue(2)：1-12,12.DOI:10.3963/j.issn.1001-487X.2025.02.001
钢筋混凝土立柱钻孔爆破破坏过程数值分析与试验研究
Numerical Analysis and Experimental Study on Failure Process of Drilling and Blasting in Reinforced Concrete Columns
摘要
Abstract
In blasting demolition projects of housing buildings,reinforced concrete columns serve as the primary load-bearing structural elements and consequently represent the most frequently targeted components for controlled demolition.The effectiveness of reinforced concrete column demolition through blasting operations plays a pivotal role in ensuring structural instability and controlling the overall collapse mechanism.The evolution of modern reinforced concrete columns,characterized by increased cross-sectional dimensions,higher reinforcement densities,and en-hanced material strengths,has significantly elevated the technical complexity of the design of blasting parameters and the protection of flying rocks.The Particle Blasting Method coupled with the Finite Element Method(PBM-FEM)was employed to simulate the dynamic process of explosion impact loading and explosion gas escaping from the borehole through the high-speed motion collision of particles.Full-scale 1∶1 physical model tests were conducted using indus-trial electronic detonators to accurately replicate the blasting demolition process of high-rise building structural mem-bers.The research reveals critical insights into the failure mechanisms and damage propagation characteristics of re-inforced concrete columns under controlled demolition conditions.The results show that the explosion gas escapes from the orifice and reduces the utilization rate of explosive energy due to the limited constraint effect of the blocking material on the side of the blast hole.The severity of concrete spalling on the surface of the column is left and right sides＞front side＞back side.The direction of the minimum resistance line is the main direction to induce con-crete damage and throwing.关键词
爆破拆除/钢筋混凝土/钻孔爆破/破坏失效/数值模拟Key words
blasting demolition/reinforced concrete/drilling and blasting/structure failure/numerical simulation分类
建筑与水利引用本文复制引用
黄小武,谢先启,贾永胜,刘昌邦,姚颖康,伍岳..钢筋混凝土立柱钻孔爆破破坏过程数值分析与试验研究[J].爆破,2025,42(2):1-12,12.基金项目
中国工程院战略研究与咨询项目(2023XZ35) （2023XZ35）
国家自然科学基金项目(52478525) Strategic Research and Consulting Project of Chinese Academy of Engineering(2023XZ35),National Natural Science Foundation Project （52478525）
