西安理工大学学报2018，Vol.34Issue(4)：475-480,6.DOI:10.19322/j.cnki.issn.1006-4710.2018.04.015
基于随机骨料模型的再生混凝土单轴压缩数值模拟
Numerical simulation of recycled concrete under uniaxial compression based on random aggregate model
摘要
Abstract
Based on the concrete damage plasticity constitutive model, aprogram of the concrete random aggregate is developed.The bifacial mesoscopic structure models of the recycled concrete random aggregate are established by the finite element software ABAQUS.The mesoscopic mechanical properties of the recycled concrete, such as the compressive strength, peak strain, damage development, stress distribution and so on are studied.The effects of the new and old hardened mortar strength, the strength and thickness in the internal and external interface area on the mechanical properties are analyzed.The results show that there exist tensile stress and shear stress concentration problem in the internal and external interface area of the recycled concrete under uniaxial compression.The damage failure is mainly caused by the concentration of the tensile stress and shear stress.The initial damage occurs first in the weaker interfacial region, with the damage developed to the mortar area.The strength of the new and old hardened mortar strength has greatly affected the concrete compressive strength, and it has a small impact on the interface region and the outer interface strength.The old hardened mortar may weaken the mechanical properties of the recycled concrete.关键词
损伤塑性/再生混凝土/随机骨料/细观结构Key words
damage plasticity/recycled concrete/random aggregate/mesoscopic structure分类
建筑与水利引用本文复制引用
姚泽良,段东旭,党发宁,张芳芳..基于随机骨料模型的再生混凝土单轴压缩数值模拟[J].西安理工大学学报,2018,34(4):475-480,6.基金项目
国家自然科学基金资助项目(51208422) （51208422）
陕西省科技攻关资助项目(2014K08-19) （2014K08-19）
西安市科技计划资助项目(2017080CG/RC043(XALG030)) （2017080CG/RC043(XALG030）
西安市碑林区科技计划资助项目(GX1818) （GX1818）
