摘要
为研究再生混凝土材料的力学性质,应用ANSYS的APDL参数化编程和AUTOCAD几何功能,生成含随机分布再生骨料、粘结界面和水泥砂浆基体的三相复合材料的细观模型,从细观力学的角度建立再生混凝土材料的非线性损伤本构方程,模拟再生混凝土材料单轴受压时的细观破坏过程,分析界面强度和损伤参数对再生混凝土材料的抗压强度的影响,所得应力-应变关系体现了再生混凝土材料的应变软化现象,与现有的试验结果相比,具有较好的一致性.
In order to study the mechanical properties of recycled concrete, a three-phase microscopic composites model with random recycled aggregates, interface and cement mortar was constructed by combining the APDL technology in ANSYS with geometrical function in AUTOCAD in this paper. A constitute equation with non-linear damage was established to simulate the fracture process of recycled concretes, and the influence of interfacial strength and damage parameters on the compressive strength of recycled concrete materials was investigated. The strain softening was shown in stress-strain relationship, which has better consistency compared with existing test results.
出处
《辽宁工程技术大学学报（自然科学版）》
CAS
北大核心
2014年第1期88-93,共6页
Journal of Liaoning Technical University (Natural Science)
基金
国家自然科学基金资助项目(11172066/A020305)
广东省自然科学基金资助项目(S2011010004874)
长沙理工大学省重点实验室开放基金资助项目(2012CL06)
佛山市科技发展专项基金资助项目(FZ2010033)
关键词
再生混凝土
随机再生骨料
细观力学
应力-应变关系
应变软化
数值模拟
非线性损伤
单轴受压
recycled concretes
randomly distributed recycled aggregate
microscopic mechanics
stress-strainrelationship
strain softening
numerical simulation
non-linear damage
uniaxial compression
