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Coupled finite/discrete elements method to analyze localized impact on reinforced concrete structure

机译：有限元/离散元耦合方法分析钢筋混凝土结构局部受力

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摘要

A combined finite/discrete elements method is proposed for the prediction of concrete structure response under severe dynamical loading such as impacts. The start point of the method is the use of a bridging subdomain where the Hamiltonian is chosen as a linear combination of discrete and continuum Hamiltonians. In the overlapping domain, Discrete Element (DE) degrees of freedom and Finite Element (FE) ones are linked by means of Lagrange multipliers. Numerical methods are proposed to deal with spurious wave reflections that appear at the interface due to the discretization size discontinuity. A simulation of an impact on a concrete slab is presented with focus on computational time.
机译：提出了一种有限元/离散元相结合的方法来预测大的动态载荷（如冲击）下的混凝土结构响应。该方法的起点是使用桥接子域，其中选择哈密顿量为离散和连续哈密顿量的线性组合。在重叠域中，离散元素（DE）的自由度和有限元素（FE）的自由度通过拉格朗日乘子相连。提出了数值方法来处理由于离散化尺寸不连续性而在界面处出现的杂散波反射。对计算混凝土板的影响进行了仿真。

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