黄小武,谢先启,贾永胜,刘昌邦,姚颖康,伍岳

• 1:武汉爆破有限公司
• 2:江汉大学精细爆破国家重点实验室
• 3:江汉大学爆破工程湖北省重点实验室

摘要(Abstract)：

在房屋类建筑物爆破拆除工程中，钢筋混凝土立柱是主要承载构件，也是拆除爆破工程中面临最多的爆破对象。钢筋混凝土立柱的爆破破坏效果，直接影响承载构件的可靠失稳，进而影响结构的整体倒塌。近年来，钢筋混凝土立柱呈现出尺寸大、配筋多、强度高等特征，对爆破参数设计和飞石防护提出了巨大的挑战。采用粒子爆破法耦合有限元算法(PBM-FEM),通过粒子的高速运动碰撞模拟爆炸冲击荷载和爆生气体逸出炮孔的过程；通过1∶1原尺寸物理模型爆破试验，采用工业电子雷管真实还原了高层楼房承重构件爆破拆除过程，揭示了钢筋混凝土立柱的钻孔爆破破坏过程及其爆破破坏失效机理。研究结果表明：因炮孔侧堵塞材料的约束作用有限，爆生气体会从孔口逸出，降低了炸药能量的利用率。立柱表面混凝土的剥落情况严重程度依次为：左、右两侧>前侧>后侧，最小抵抗线的方向是诱导混凝土发生破坏和抛掷的主要方向。

关键词(KeyWords)： 爆破拆除;钢筋混凝土;钻孔爆破;破坏失效;数值模拟

Abstract:

Keywords:

基金项目(Foundation): 中国工程院战略研究与咨询项目(2023XZ35);; 国家自然科学基金项目(52478525)~~

作者(Author): 黄小武,谢先启,贾永胜,刘昌邦,姚颖康,伍岳

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