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Simplified theoretical analysis and numerical study on the dynamic behavior of FCP under blast loads
Frontiers of Structural and Civil Engineering ( IF 3 ) Pub Date : 2020-06-25 , DOI: 10.1007/s11709-020-0633-4
Chunfeng Zhao , Xin Ye , Avinash Gautam , Xin Lu , Y. L. Mo

Precast concrete structures have developed rapidly in the last decades due to the advantages of better quality, non-pollution and fast construction with respect to conventional cast-in-place structures. In the present study, a theoretical model and nonlinear 3D model are developed and established to assess the dynamic behavior of precast concrete slabs under blast load. At first, the 3D model is validated by an experiment performed by other researchers. The verified model is adopted to investigate the blast performance of fabricated concrete panels (FCPs) in terms of parameters of the explosive charge, panel thickness, and reinforcement ratio. Finally, a simplified theoretical model of the FCP under blast load is developed to predict the maximum deflection. It is indicated that the theoretical model can precisely predict the maximum displacement of FCP under blast loads. The results show that the failure modes of the panels varied from bending failure to shear failure with the mass of TNT increasing. The thickness of the panel, reinforcement ratio, and explosive charges have significant effects on the anti-blast capacity of the FCPs.

中文翻译:

爆炸荷载下FCP动力特性的简化理论分析和数值研究

预制混凝土结构在过去几十年中得到了快速发展,这是由于相对于传统的现浇结构而言,其质量更高,无污染且施工迅速的优点。在本研究中,建立并建立了理论模型和非线性3D模型来评估爆炸荷载下预制混凝土板的动力特性。首先,通过其他研究人员进行的实验来验证3D模型。采用验证模型,根据炸药装药量,面板厚度和配筋率等参数研究了预制混凝土面板的爆炸性能。最后,建立了爆炸载荷下FCP的简化理论模型,以预测最大挠度。结果表明,该理论模型能够准确预测爆炸载荷作用下FCP的最大位移。结果表明,随着TNT质量的增加,面板的破坏模式从弯曲破坏变为剪切破坏。面板的厚度,增强比和炸药对FCP的抗爆炸能力有重要影响。
更新日期:2020-06-25
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