Peng Yijiang, Zakaria Semaoui, Sun Yucheng, Chen Ying, Zhang Lijuan
Key Laboratory of Urban Security and Disaster Engineering, Ministry of Education, Beijing University of Technology, Beijing 100124, China.
Materials (Basel). 2021 Dec 25;15(1):145. doi: 10.3390/ma15010145.
In this paper, a parallel homogenization model for recycled concrete was proposed. A new type of finite element method, the base force element method, based on the complementary energy principle and the parallel homogenization model, is used to conduct meso-level damage research on recycled concrete. The stress-strain softening curve and failure mechanism of the recycled concrete under uniaxial tensile load are analyzed using the nonlinear damage analysis program of the base force element method based on the parallel homogenization model. The tensile strength and destructive mechanisms of recycled concrete materials are studied using this parallel homogenization model. The calculation results are compared with the results of the experiments and meso-level random aggregate model analysis methods. The research results show that this parallel homogenization analysis method can be used to analyze the nonlinear damage analysis of recycled concrete materials. The tensile strength, stress-strain softening curve, and crack propagation process of recycled concrete materials can be obtained using the present method.
本文提出了一种再生混凝土的并行细观均质化模型。基于余能原理和并行细观均质化模型，采用一种新型有限元方法——基力元法，对再生混凝土进行细观损伤研究。利用基于并行细观均质化模型的基力元法非线性损伤分析程序，分析了再生混凝土在单轴拉伸荷载作用下的应力 - 应变软化曲线及破坏机理。采用该并行细观均质化模型研究了再生混凝土材料的抗拉强度和破坏机理。将计算结果与试验结果以及细观随机骨料模型分析方法的结果进行了比较。研究结果表明，这种并行细观均质化分析方法可用于分析再生混凝土材料的非线性损伤。采用本文方法可得到再生混凝土材料的抗拉强度、应力 - 应变软化曲线及裂纹扩展过程。
