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1. 北京理工大学 爆炸科学与技术国家重点实验室, 北京 100081
2. 同济大学 智能建造研究室, 上海 200092
Received:09 January 2023,
Published Online:12 January 2024,
Published:30 December 2023
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Liu XIA, Weichao WU, Aigang PAN, et al. A Comparison of Damage Effectivenesses of Reinforced Concrete Beams by Single-point and Three-point Array Damage Patterns[J]. Acta Armamentarii, 2023, 44(12): 3851-3861.
Liu XIA, Weichao WU, Aigang PAN, et al. A Comparison of Damage Effectivenesses of Reinforced Concrete Beams by Single-point and Three-point Array Damage Patterns[J]. Acta Armamentarii, 2023, 44(12): 3851-3861. DOI: 10.12382/bgxb.2023.0021.
为获得三点阵列接触爆炸的毁伤规律及增益效果
开展钢筋混凝土梁三点阵列接触爆炸、单点接触爆炸试验和数值模拟研究。观测在相同总装药量下的局部破坏特征
分析在不同毁伤模式下对局部毁伤效应的影响。研究结果表明:总装药量相同时
三点阵列爆炸过程中多个爆炸压缩波在梁构件内部传播并发生耦合增强效应
有效提升破坏威力
构件发生正面成坑、侧面崩落、背面震塌和截面冲切4种局部破坏模式
而单点毁伤模式仅发生正面成坑、侧面崩落和背面震塌3种局部破坏模式;结合有限元仿真结果
发现在一定范围内
随着炸药之间距离的降低
梁跨中的毁伤深度越大但迎爆面的损伤面积减小
随着炸药数量的增加
其迎爆面的损伤面积增大
但损伤深度相应的减小
这表明在接触爆炸载荷作用下
钢筋混凝土梁的破坏不仅与装药阵列距离和装药数量有关
还与阵列中单体装药的质量有关;研究成果可为钢筋混凝土梁的高效毁伤和提高爆炸能量利用率的研究提供一定的参考。
The single-point and three-point array contact explosion tests and numerical simulations of reinforced concrete beams are investigated to obtain the destruction law and the gain effect of three-point array contact explosion. The local failure characteristics under the same total mass of explosives were observed
and the effects on the local damage effect under different damage patterns were analyzed. The results show that
when the total mass of explosives is the same
multiple blast compressive waves propagate inside the beam member during the explosion of the three-point array and occur a coupling enhancement effect
effectively enhancing the damage power. Four local damage patterns of front cratering
side breakdown
back collapsing and section punching occur in the three-point array damage
and three local damage patterns of front cratering
side breakdown and back collapsing occur in the single-point damage under the action of contact explosion load. Combined with the finite element simulation results
it is found that
the depth of destruction in the beam span is higher
but the damage area of blast-face decreases as the distance between the explosives decreases; and the damage area of blast-face increases
but the damage depth decreases accordingly as the quantity of explosives increases. This indicates that the damage of reinforced concrete beams under contact blast loads is not only related to the distance of charge array and the quantity of charges
but also to the mass of individual explosives in the array. The research results can provide a certain reference for studying the efficient damage of reinforced concrete beams and improving the utilization of explosive energy.
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汪维 , 刘瑞朝 , 吴飚 , 等 . 爆炸荷载作用下钢筋混凝土梁毁伤判据研究 [J ] . 兵工学报 , 2016 , 37 ( 8 ): 1421 - 1429 . DOI: 10.3969/j.issn.1000-1093.2016.08.012 http://doi.org/10.3969/j.issn.1000-1093.2016.08.012 为研究钢筋混凝土梁在爆炸波作用下的毁伤判据,对两种尺寸的钢筋混凝土梁在缩比条件下进行了不同爆炸距离作用和装药量下的试验研究。试验中以高层和框架结构中最常见的两种 梁为研究对象,通过11次独立的爆炸试验,观测了钢筋混凝土梁在不同装药量下的破坏模式和破坏特征。研究结果表明:钢筋混凝土梁在近区爆炸荷载作用下,在同一爆高下,随着装药量的增加,梁的破坏程度逐渐增加,破坏模式由迎爆面中心两侧少量混凝土脱落和背爆面少量断裂裂纹逐渐增加为迎爆面倒三角锥形式混凝土压碎弯曲破坏,背爆面出现三角锥裂纹和背爆面少量混凝土脱落破坏,最终迎爆面和背爆面三角锥破坏区域贯通形成中心区域压碎崩塌弯曲破坏;崩塌区域的尺寸随着装药量增加而逐渐增加。近区爆炸(以爆距0.5 m为例)作用下,试验钢筋混凝土梁的毁伤判据为:当比例爆高Z>0.4 m/kg<sup>1/3</sup> 时,梁遭受到轻微破坏;当比例爆高0.3 m/kg<sup>1/3</sup>1/3</sup> 时,梁遭受到中等破坏;当比例爆高0.28 m/kg<sup>1/3</sup>1/3</sup>时,混凝土梁遭受重度破坏;当比例爆高Z1/3</sup>,梁遭受严重破坏。在近区爆炸作用下,钢筋混凝土梁的破坏不仅依赖于爆炸比例距离,还与爆高有关,同一比例距离下爆高越大,梁试件的破坏越严重。研究结果可为工程应用及毁伤评估提供参考。
WANG W , LIU R C , WU B , et al . Damage criteria of reinforced concrete beams under blast loading [J ] . Acta Armamentarii , 2016 , 37 ( 8 ): 1421 - 1429 . (in Chinese) DOI: 10.3969/j.issn.1000-1093.2016.08.012 http://doi.org/10.3969/j.issn.1000-1093.2016.08.012 In order to investigate the damage criteria of reinforced concrete (RC) beams under blast loading, the experimental study of two different dimensions of RC beams under different blast distances and charge masses is carried out. Two common RC beams designed for tall buildings and frame structures are taken as the research objects. The damage mode and characteristics of RC beams are got through 11 independent blast experiments. The results show that, when RC beams are subjected to close-in blast loading, the damage level increases with the increase in explosive mass at the same blast distance, the damage mode of RC beams changes from a few fall-off of concrete on the two sides of upper side and a few ruptures on the rear face to the compressed flexural damage of reverse triangle cone-shaped concrete on the upper side and triangle cone-shaped crack and a fall-off of concrete on the rear face, and finally the triangle cone-shaped damage areas on both upper side and rear face are perforated to result in a crushed and punched damage of concrete in the middle area. The damage area increases with the increase in explosive mass. Under close-in blast loading (blast distance= 0.5 m for example), the damage criteria of the RC beams used in the experiment are: the beam suffers from minor damage for scaled burst distance Z>0.4 m/kg<sup>1/3</sup>; it suffers from moderate damage for scaled burst distance 0.3 m/kg<sup>1/3</sup><Z<0.4 m/kg<sup>1/3</sup>; it suffers from high damage for scaled burst distance 0.28 m/kg<sup>1/3</sup><Z<0.3 m/kg<sup>1/3</sup>; it suffers from serious damage for scaled burst distance Z<0.28 m/kg<sup>1/3</sup>. It is also found that the damage of RC beam not only depends on the scaled burst distance under close-in blast loading, but also depends on the burst distance. At the same scaled burst distance, the more the burst distance is, the damage of RC beam is more serious. The results can be useful for engineering application and damage assessments.
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