摘要
在细观层次上将橡胶混凝土看作由砂浆、粗骨料、橡胶颗粒、砂浆-粗骨料界面、砂浆-橡胶界面及分布在界面中的初始缺陷组成的多相非均质复合材料,建立考虑初始缺陷的橡胶混凝土细观计算模型,模拟橡胶混凝土在轴压荷载作用下的强度和开裂破坏过程,结果显示:损伤区域首先出现在橡胶颗粒周围;初始缺陷的随机分布位置对橡胶混凝土强度影响不大,但其含量对强度有较明显的影响。与物理试验对比发现:该模型能较好地模拟橡胶混凝土的轴压强度和开裂过程。
A numerical model considering initial interface defects was developed to simulate the strength of rubber concrete at mesoscale. In this model,rubber concrete was simulated as a multi-phase composite material consisting of matrix, coarse aggre-gate, rubber particles, interfacial transition zone between aggregate and matrix, interfacial transition zone between rubber and matrix, and initial defects in ITZ on mesolevel. The damage process and strength of rubber concrete under axial load was simulated and compared with experimental results. Results showed that the numerical simulation results agreed well with the experimental results. Meanwhile,the damage zone appeared first around the rubber particles. In addition,it’s the content rather than distribution of initial defects had obvious influence on the strength of rubber concrete.
出处
《中国科技论文》
CAS
北大核心
2016年第13期1516-1519,共4页
China Sciencepaper
基金
高等学校博士学科点专项科研基金资助项目(20134101120007
20131317120012)
国家自然科学基金资助项目(51309073
51309203)
水利部公益性行业科研专项经费资助项目(201301027)
河北省自然科学基金资助项目(E2014202257)
关键词
橡胶混凝土
轴压强度
细观
初始缺陷
rubber concrete
axial compressive strength
meso scale
initial defects
