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A Discrete Element Method based-approach for arched masonry structures under blast loads

机译：基于离散的元件方法 - 拱形砖结构下的抗震载荷

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摘要

Masonry structures are often characterized by complex, non-planar geometries. This is also the case for historical and monumental structures. Here we investigate the dynamic behaviour of non-standard, curvilinear masonry geometries, such as vaults, subjected to blast loading.We use the Discrete Element Method (DEM) for modelling the dynamic structural response to explosions. The approach allows considering the detailed mechanical and geometrical characteristics of masonry, as well as the inherent coupling between the in- and out-of-plane motion.The proposed modelling approach is validated with existing experimental tests in the case of planar masonry geometries, walls. The DEM model well captures the dynamic response of the system and the form of failure within the masonry structure.Then the response of a curved masonry structure subjected to blast loading is investigated. The influence of various micro-mechanical parameters, such as the dilatancy angle, the tensile strength and the cohesion of the masonry joints on the overall dynamic structural response of the system is explored. The effect of the size of the building blocks is also studied.Finally, the common DEM assumption of rigid blocks is assessed through detailed comparisons with simulations involving deformable blocks.
机译：砌体结构通常是复杂的非平面几何形状的特征。这也是历史和纪念性结构的情况。在这里，我们研究了非标准的动态行为，曲线砌体几何形状，例如拱顶，经过爆炸载荷。我们使用离散元法（DEM）来建模动态结构响应对爆炸。该方法允许考虑砌体的详细机械和几何特征，以及平面外运动之间的固有耦合。建议的建模方法在平面砌体几何形状，墙壁的情况下验证了现有的实验测试。 。 DEM模型很好地捕获了系统的动态响应和砌体结构内的故障形式。该改变进行弯曲载荷的弯曲砌体结构的响应。探讨了各种微机械参数的影响，例如膨胀角，拉伸强度和砌体接头的整体动态结构响应对系统的整体动态结构响应。还研究了构建块的大小的效果。最后，通过详细的比较来评估刚性块的常见DEM假设，这些模拟涉及可变形块的模拟。

著录项

  • 来源
    《Engineering Structures》 |2020年第1期|110721.1-110721.16|共16页
  • 作者

    Masi Filippo; Stefanou Ioannis; Maffi-Berthier Victor; Vannucci Paolo;

  • 作者单位

    UPE CNRS Ecole Ponts Lab Navier UMR 8205 IFSTTAR 6-8 Ave Blaise Pascal F-77455 Champs Sur Marne France|Ingerop Conseil & Ingn 18 Rue Deux Gares F-92500 Rueil Malmaison France;

    UPE CNRS Ecole Ponts Lab Navier UMR 8205 IFSTTAR 6-8 Ave Blaise Pascal F-77455 Champs Sur Marne France;

    UPE CNRS Ecole Ponts Lab Navier UMR 8205 IFSTTAR 6-8 Ave Blaise Pascal F-77455 Champs Sur Marne France;

    Univ Versailles & St Quentin LMV UMR 8100 55 Ave Paris F-78035 Versailles France;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Masonry; Discrete Element Method (DEM); Blast loads; Dilatancy; Scale effect; Curved structures;

    机译：砌体;离散元素法（DEM）;爆炸载荷;膨胀;缩放效果;弯曲结构;

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