东南大学学报（自然科学版）2016，Vol.18Issue(3)：552-558,7.DOI:10.3969/j.issn.1001-0505.2016.03.016
模型再生混凝土单轴受压静力与疲劳性能数值仿真
Numerical simulation on static force and fatigue behaviors of modeled recycled aggregate concrete under uniaxial compression
摘要
Abstract
To investigate the effect of the mechanical properties of each phase in recycled concrete on its macroscopic mechanical behaviors,and to find an effective way to improve the static behavior and the fatigue strength of recycled concrete,the finite element model for modeled recycled aggre-gate concrete (MRAC)with 9 coarse aggregates was established by ABAQUS software,and differ-ent damage constitutive relationships were selected for different phases.The dynamic explicit step and the direct cyclic step were used to simulate the static behavior and low-cycle fatigue procedure under uniaxial compression,respectively,and the simulation results of the static behaviors were compared with the experimental results.The variable parameter analysis results show that the simula-tion results of the static behaviors are well consistent with the experimental results.Stress concentration occurs in the interface zone,resulting in a plastic strain increment of the mortar in the interface region followed by the formation and propagation of cracks.With the decrease of the replacement of recycled coarse aggregate,the uniaxial compressive strength and the peak strain of MRAC increase.With the increase of the strength of the new hardened cement paste,the uniaxial compressive strength of MRAC increases.The fatigue strength of MRAC is lower than that of the recycled aggregate concrete prism, and the tendency of the stress-life curve of MRAC is close to that of natural aggregate concrete.关键词
模型再生混凝土/单轴受压/静力/低周疲劳/数值模拟Key words
modeled recycled aggregate concrete (MRAC)/uniaxial compression/static force/low-cycle fatigue/numerical simulation分类
建筑与水利引用本文复制引用
肖建庄,黄凯文,李龙..模型再生混凝土单轴受压静力与疲劳性能数值仿真[J].东南大学学报（自然科学版）,2016,18(3):552-558,7.基金项目
国家社会科学基金重点项目“东欧马克思主义美学研究”（15AZD035）阶段性成果。 （）
