Performance of isotropic constitutive laws in simulating failure mechanisms in scaled RC beams

IF 1.1 4区工程技术 Q3 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Archives of Mechanics Pub Date : 2020-06-30 DOI:10.24423/AOM.3443

I. Marzec, J. Bobiński

引用次数: 1

Abstract

Results of numerical calculations of reinforced concrete (RC) beams are presented. Based on experimental results on longitudinally reinforced specimens of different sizes and shapes are investigated. Four different continuum constitutive laws with isotropic softening are used: one defined within continuum damage mechanics, an elasto-plastic with the Rankine criterion in tension and the Drucker–Prager criterion in compression, a formulation coupling elasto-plasticity and damage mechanics and the concrete damaged plasticity (CDP) model implemented in Abaqus. In a softening regime, a non-local theory of integral format is applied to the first three constitutive laws. A fracture energy approach is utilised in CDP model. An ability to reproduce different failure mechanisms observed in experiments for each constitutive model is analysed. A comparison of force-displacement curves and crack patterns between numerical and experimental outcomes is performed.

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各向同性本构律在模拟比例混凝土梁破坏机制中的表现

给出了钢筋混凝土梁的数值计算结果。根据试验结果，对不同尺寸和形状的纵向加筋试件进行了研究。使用了四种不同的具有各向同性软化的连续介质本构律:一个定义在连续介质损伤力学中，一个在拉伸中使用Rankine准则和压缩中使用Drucker-Prager准则的弹塑性，一个耦合弹塑性和损伤力学的公式以及在Abaqus中实现的混凝土损伤塑性(CDP)模型。在软化状态下，将非局部积分格式理论应用于前三个本构律。CDP模型采用断裂能方法。分析了在每个本构模型实验中观察到的再现不同破坏机制的能力。数值结果与实验结果进行了力-位移曲线和裂纹模式的比较。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Archives of Mechanics 工程技术-材料科学：表征与测试

CiteScore

1.40

自引率

12.50%

发文量

审稿时长

>12 weeks

期刊介绍： Archives of Mechanics provides a forum for original research on mechanics of solids, fluids and discrete systems, including the development of mathematical methods for solving mechanical problems. The journal encompasses all aspects of the field, with the emphasis placed on: -mechanics of materials: elasticity, plasticity, time-dependent phenomena, phase transformation, damage, fracture; physical and experimental foundations, micromechanics, thermodynamics, instabilities; -methods and problems in continuum mechanics: general theory and novel applications, thermomechanics, structural analysis, porous media, contact problems; -dynamics of material systems; -fluid flows and interactions with solids. Papers published in the Archives should contain original contributions dealing with theoretical, experimental, or numerical aspects of mechanical problems listed above. The journal publishes also current announcements and information about important scientific events of possible interest to its readers, like conferences, congresses, symposia, work-shops, courses, etc. Occasionally, special issues of the journal may be devoted to publication of all or selected papers presented at international conferences or other scientific meetings. However, all papers intended for such an issue are subjected to the usual reviewing and acceptance procedure.