论文标题
考虑到饱和的影响
Peridynamic modeling for impact failure of wet concrete considering the influence of saturation
论文作者
论文摘要
在本文中，根据普通基于状态的peridenannannannannannannannegy理论的构型，已经提出了一种用于分析湿混凝土影响失败的中等均质性peridegized Peridyanic（IH-PD）模型。混凝土的中间结构特性与IH-PD模型中的宏观机械行为有关，其中考虑了混凝土的异质性，计算成本不增加。同时，考虑了混凝土的孔隙率，通过删除两个材料点之间的键以及孔隙率对混凝土机械性能的影响来实现。此外，分别计算湿混凝土（饱和和不饱和混凝土）中水泥砂浆的有效体积和剪切模量。从三个方面描述了湿混凝土的动态模型：强度，动态增加因子和状态方程。通过分析一些基准测试并与相应的实验和其他可用的数值结果进行比较，可以建立对所提出模型的验证。
In this paper, a modified intermediately homogenized peridynamic (IH-PD) model for analyzing impact failure of wet concrete has been presented under the configuration of ordinary state-based peridynamic theory. The meso-structural properties of concrete are linked to the macroscopic mechanical behavior in the IH-PD model, where the heterogeneity of concrete is taken into account, and the calculation cost does not increase. Simultaneously, the porosity of concrete is considered, which is implemented by deleting the bond between two material points, as well as the influence of porosity on the mechanical properties of concrete. Moreover, the effective bulk and shear modulus of cement mortar in wet concrete (saturated and unsaturated concrete) are calculated respectively. The dynamic model for wet concrete is described from three aspects: strength, dynamic increase factor, and equation of state. Validation of the proposed model is established through analyzing some benchmark tests and comparing with the corresponding experiment and other available numerical results.
