焦楚杰, 孙 伟, 高培正. 钢纤维高强混凝土抗爆炸研究[J]. 工程力学, 2008, 25(3): 158-166.
引用本文: 焦楚杰, 孙 伟, 高培正. 钢纤维高强混凝土抗爆炸研究[J]. 工程力学, 2008, 25(3): 158-166.
JIAO Chu-jie, SUN Wei, GAO Pei-zheng. STUDY ON STEEL FIBER REINFORCED HIGH STRENGTH CONCRETE SUBJECT TO BLAST LOADING[J]. Engineering Mechanics, 2008, 25(3): 158-166.
Citation: JIAO Chu-jie, SUN Wei, GAO Pei-zheng. STUDY ON STEEL FIBER REINFORCED HIGH STRENGTH CONCRETE SUBJECT TO BLAST LOADING[J]. Engineering Mechanics, 2008, 25(3): 158-166.

钢纤维高强混凝土抗爆炸研究

STUDY ON STEEL FIBER REINFORCED HIGH STRENGTH CONCRETE SUBJECT TO BLAST LOADING

  • 摘要: 对纤维体积率(Vf)为0%―3%、基体强度为C100的钢纤维高强混凝土(SFRHSC)板进行模型爆炸试验,结果表明:爆炸应力波在混凝土中呈现明显的衰减特性,衰减幅度与混凝土强度等级、Vf之间的关系不大,但背爆面加速度峰值和迎爆面破坏程度则随着Vf的增加而降低;SFRHSC最大最显著的优势是抗震塌,在普通混凝土板大面积震塌,碎裂块爆飞的装药量爆炸条件下,SFRHSC板却无震塌发生或只有小块体脱离,裂而不散,其抗震塌性能的提高主要取决于材料的抗拉强度;根据试验结果建立了基于神经网络系统的SFRHSC震塌模型,模型计算的理论值与实测值比较接近。

     

    Abstract: Scaled explosive tests have been conducted to investigate the performance of steel fiber reinforced high strength concrete (SFRHSC) panels. The volume fractions (Vf ) of steel fibers of SFRHSC ranged from 0 to 3%, and the matrix used was C100. The experiment showed that blast stress waves attenuated obviously in the concrete, and that the degree of attenuation was not closely related to the strength and Vf of SFRHSC. However, with the increase of the Vf , the peak acceleration at the bottom of the concrete panels and the destruction of the panel faces decreased. The experiment also indicated that SFRHSC panels had remarkable antiscabbing properties, which were mainly dependent on the tension strength of SFRHSC. Subjected to the detonation of a certain charge weights, large surface areas of the ordinary concrete panels scabbed, and the fragments flied off in multiple directions, but the SFRHSC panels didn’t scab or only spalled slightly. On the basis of the experiments, a scabbing model for SFRHSC based on the artificial neural network system was established. The theoretical values from the model matched well with the experimental ones.

     

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