爆破2026，Vol.43Issue(1)：138-147,165,11.DOI:10.3963/j.issn.1001-487X.2026.01.015
钻孔爆破条件下钢筋混凝土构件炮孔近区损伤特性研究
Damage Characteristics of Reinforced Concrete Components in Near-field of Blast Holes under Drilling and Blasting Conditions
摘要
Abstract
Revealing the failure mechanisms of reinforced concrete beams and columns under drilling and blas-ting conditions is essential for achieving precise blasting demolition design and accurate assessment of blasting effects.Based on an actual deep foundation pit support beam blasting demolition project,this research investigated the dynamic strain characteristics of the hole wall,near-field zone,and the mid-to-far zones under single-hole blasting conditions through field blasting tests and strain measurements.Through explosion dynamics theory,the study calcu-lated borehole wall pressure,damage factors,and damage zoning characteristics.Results demonstrate that under com-bined blast stress waves and quasi-static gas effects,reinforced concrete support beams exhibit first compression and then pull'strain characteristics in borehole walls and near-field concrete,with measured strain curves closely aligning with numerical simulation results at both tensile and compressive peaks.The damage distribution in reinforced con-crete beams subjected to blasting exhibited a nonlinear attenuation pattern,characterized by rapid decay in the near-field region and gradual reduction to zero in the far-field region.Both numerical simulations and theoretical calcula-tions demonstrated good agreement in the extent of the crushing and fracture zones,with approximately 10％absolute deviation between the two methods.The theoretical and numerical models developed in this study effectively analyze blast-induced damage zoning,with findings offering valuable references for assessing damage characteristics and af-fected areas in reinforced concrete components during demolition blasting.关键词
钻孔爆破/钢筋混凝土构件/爆炸荷载/破坏分区Key words
drilling and blasting/reinforced concrete components/blast loading/damage zoning分类
矿业与冶金引用本文复制引用
姚颖康,康怡泽,章强,张程,王威..钻孔爆破条件下钢筋混凝土构件炮孔近区损伤特性研究[J].爆破,2026,43(1):138-147,165,11.基金项目
国家重点研发计划项目(2021-008) （2021-008）
国家自然科学基金资助项目(52478525) （52478525）
湖北省中央引导地方科技发展专项(2025CSA014、2024CSA094) National Key Research and Development Program of China(2021-008),National Natural Science Foundation of China(52478525),Hubei Province Central Government Guidance for Local Science and Technology Development Special Project(2025CSA014,2024CSA094) （2025CSA014、2024CSA094）
