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Lattice Discrete Particle Model for the Simulation of Irregular Stone Masonry

机译：晶格离散粒子模型，用于模拟不规则石砌体

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摘要

This paper focuses on the simulation of irregular stone masonry by the lattice discrete particle model (LDPM), which simulates the fracture and failure behavior of quasi-brittle heterogeneous materials by modeling the interaction among coarse material heterogeneities. LDPM is formulated at the length scale of the masonry stones whose interaction is described through constitutive equations featuring softening in tension and strain hardening in compression. The numerical results relevant to diagonal compression tests show that the intrinsic stochastic character of LDPM can quantify the variation of the mechanical properties of irregular masonry resulting from random stone size and stone-size distribution. Furthermore, the paper presents an analysis of the size effect on irregular stone masonry structures. This was obtained by simulating the shear behavior of geometrically similar samples of different sizes. The simulations demonstrate that increasing structural size leads to a significant reduction of both structural strength and structural ductility. The magnitude of the predicted size effect suggests that, contrary to typical experimental results on reduced size samples, real irregular masonry structures must be considered as perfectly brittle. (C) 2021 American Society of Civil Engineers.
机译：本文侧重于晶格离散粒子模型（LDPM）模拟不规则石砌体，其通过模拟粗物质异质性之间的相互作用来模拟准脆性异质材料的断裂和失效行为。 LDPM以砌体结石的长度刻度配制，其相互作用通过张力和压缩中的张力硬化的张力和应变硬化的组成方程描述。与对角线压缩试验相关的数值结果表明，LDPM的内在随机特征可以量化由随机石尺寸和石材尺寸分布产生的不规则砌体的机械性能的变化。此外，本文提出了对不规则石砌结构结构的尺寸效应的分析。这是通过模拟几何类似尺寸样本的剪切行为来获得的。该模拟表明，增加的结构尺寸导致结构强度和结构延展性的显着降低。预测尺寸效应的幅度表明，与典型的实验结果相反，对缩小的样品的典型实验结果，实际不规则的砌体结构必须被认为是完全脆的。 （c）2021年美国土木工程师协会。

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  • 来源
    《Journal of structural engineering》 |2021年第9期|04021123.1-04021123.13|共13页
  • 作者

    Angiolilli Michele; Pathirage Madura; Gregori Amedeo; Cusatis Gianluca;

  • 作者单位

    Univ Aquila Dept Civil Construct & Environm Engn I-67100 Laquila Italy;

    Northwestern Univ McCormick Sch Engn & Appl Sci Dept Civil & Environm Engn Evanston IL 60208 USA;

    Univ Aquila Dept Civil Construct & Environm Engn I-67100 Laquila Italy;

    Northwestern Univ McCormick Sch Engn & Appl Sci Dept Civil & Environm Engn Evanston IL 60208 USA;

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