姚颖康,康怡泽,章强,张程,王威

• 1:江汉大学精细爆破全国重点实验室
• 2:江汉大学爆破工程湖北省重点实验室
• 3:中山大学土木工程学院
• 4:中山大学隧道工程灾变防控与智能建养全国重点实验室(中山大学)

摘要(Abstract)：

明晰钢筋混凝土构件在钻孔爆破作用下的损伤特性是爆破拆除量化设计和爆破效果定量评价的前提。依托某深基坑支撑梁爆破拆除工程，通过现场爆破试验和应变测试获取了单孔爆破条件下炮孔孔壁、炮孔近区以及中远区的动应变特征，然后采用爆炸动力学相关理论计算了炮孔孔壁压力、损伤因子和破坏分区特征，最后采用LS-DYNA软件对现场试验进行了数值模拟。研究结果表明:钢筋混凝土构件在孔内炸药爆炸应力波和准静态气体共同作用下，炮孔孔壁及近区混凝土应变呈“先压后拉”特征，应变实测曲线与数值模拟结果一致，拉压峰值基本接近;钢筋混凝土构件的损伤分布呈非线性递减，近区损伤衰减快，远区缓慢且趋于0，数值模拟和理论计算的破坏粉碎区和裂隙区范围比较接近，绝对值相差10%左右;本文采用的理论分析模型和数值模型可满足炮孔近区损伤特征分析。研究成果可为钻孔爆破条件下钢筋混凝土构件的破碎与损伤分析提供参考。

关键词(KeyWords)： 钻孔爆破;钢筋混凝土构件;爆炸荷载;破坏分区

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划项目(2021-008);; 国家自然科学基金资助项目(52478525);; 湖北省中央引导地方科技发展专项(2025CSA014、2024CSA094)~~

作者(Author): 姚颖康,康怡泽,章强,张程,王威

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