陈龙明, 李述涛, 陈叶青, 朱擎. 配筋对超高性能混凝土抗爆性能的影响[J]. 工程力学, 2023, 40(S): 98-107. DOI: 10.6052/j.issn.1000-4750.2022.06.S042
引用本文: 陈龙明, 李述涛, 陈叶青, 朱擎. 配筋对超高性能混凝土抗爆性能的影响[J]. 工程力学, 2023, 40(S): 98-107. DOI: 10.6052/j.issn.1000-4750.2022.06.S042
CHEN Long-ming, LI Shu-tao, CHEN Ye-qing, ZHU Qing. INFLUENCE OF REINFORCEMENT DIAMETER AND SPACING ON IMPLOSION RESISTANCE OF ULTRA-HIGH PERFORMANCE CONCRETE[J]. Engineering Mechanics, 2023, 40(S): 98-107. DOI: 10.6052/j.issn.1000-4750.2022.06.S042
Citation: CHEN Long-ming, LI Shu-tao, CHEN Ye-qing, ZHU Qing. INFLUENCE OF REINFORCEMENT DIAMETER AND SPACING ON IMPLOSION RESISTANCE OF ULTRA-HIGH PERFORMANCE CONCRETE[J]. Engineering Mechanics, 2023, 40(S): 98-107. DOI: 10.6052/j.issn.1000-4750.2022.06.S042

配筋对超高性能混凝土抗爆性能的影响

INFLUENCE OF REINFORCEMENT DIAMETER AND SPACING ON IMPLOSION RESISTANCE OF ULTRA-HIGH PERFORMANCE CONCRETE

  • 摘要: 爆炸荷载作用下,超高性能混凝土(UHPC)防护结构的内部配筋形式对抗爆性能具有显著影响。该文利用数值方法研究不同配筋形式对超高性能钢筋混凝土抗爆性能的影响。使用试验结果验证数值建模方法和材料参数的可靠性,建立32个不同钢筋直径和间距的炸药-空气-UHPC-钢筋数值模型,通过分析结构的局部破坏和背爆面位移,给出近爆作用下不同配筋形式的超高性能钢筋混凝土结构抗爆特性。研究表明:不同配筋率下,钢筋-UHPC结构的动态损伤规律具有相似性;配筋率相同时,钢筋直径是影响结构抗爆性能的主要因素。局部加载时,采用细钢筋的UHPC结构抗爆性能优于粗钢筋,其中均匀布筋效果最优。而整体加载时,不同配筋方式的UHPC结构损伤差异较小。

     

    Abstract: The reinforcement form of ultra-high performance concrete structures significantly impacts the blast resistance characteristics. Numerical methods are thusly utilized to study the effect of different reinforcement forms on the blast resistance of ultra-high performance reinforced concrete. The experimental results are used to verify the reliability of numerical modeling and material parameters, and established are 32 explosive-air-UHPC-rebar numerical models with different steel diameters and spacings. By analyzing the local damage of the structure and the displacement of the back blast surface, presented are the blast resistance characteristics of ultra-high performance concrete structures with different reinforcement forms under explosion. The results show that the dynamic damage laws of steel-UHPC structures are similar under different reinforcement ratios. The diameter of the steel bar is the main factor affecting the blast resistance performance of the structure. Under local loading, the blast resistance performance of the UHPC with thin steel bars is better than that of thick steel bars, and the effect of uniform reinforcement is the best. When the overall load is applied, the difference between UHPC structures with the same reinforcement ratio is small.

     

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