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Nonlinear micro-mechanical analysis of masonry periodic unit cells

机译:砌体周期晶胞的非线性微观力学分析

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摘要

A model for the analysis of masonry periodic unit cells of several wall and pillar geometrical typologies is proposed. It is based on a micro-mechanical analysis of the masonry cell, which has been divided into cuboids, and coupled with constitutive laws modeling the behavior of the materials in tension and multiaxial compression. The model may be used for the determination of the tensile and compressive strength of masonry composites, in addition to its elastic properties. The results obtained from its application to case studies from the literature are compared in terms of accuracy and computational cost to finite element analyses of the same structures with a favorable outcome. Based on the micro-mechanical model formulations, and taking advantage of their low computational cost, a comprehensive parametric investigation is performed, covering the effects of several material parameters on the compressive strength of masonry. Finally, a closed-form expression for the determination of the compressive strength of masonry based on the properties of the units and the mortar is proposed.
机译:提出了一种分析墙体和柱体几何类型的砌体周期单元的模型。它基于对砌体单元的微机械分析,该单元已被划分为长方体,并结合了本构定律,对材料在拉伸和多轴压缩中的行为进行建模。除了其弹性特性外,该模型还可用于确定砌体复合材料的拉伸和压缩强度。将其应用到文献中的案例研究中获得的结果在准确性和计算成本方面与相同结构的有限元分析进行了比较,并获得了令人满意的结果。基于微机械模型公式,并利用其低的计算成本,进行了全面的参数研究,涵盖了多种材料参数对砌体抗压强度的影响。最后,根据单元和砂浆的性质,提出了一种确定砌体抗压强度的封闭形式。

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