In line with the principle of Sidoroff energy equivalence,the key parameters of CDP model such as plastic damage factor,inelastic strain,and cracking strain were studied. A meso-structure model of recycled concrete was designed based on random polygonal aggregate,old mortar,new mortar,aggregate-old mortar interface,old-new mortar interface and aggregate-new mortar interface. Some crucial compression and tension properties of recycled concrete were studied,including damage development process,stress level in all directions,failure forms,and damage values. The calculation results were compared and analyzed with test results. Research shows that the damage factors based on the principle of energy equivalence is suitable for ABAQUS modeling,and this modeling method is concise and of good convergence. The cloud diagram of compression damage of recycled concrete displays V-shape,while tension damage I-shape,and the tensile and compression damage values both reached 0.956. The simulation calculation results are in good agreement with the test results,indicating that the mesoscopic model of recycled concrete based on random polygonal aggregates is rational.
Key words
recycled concrete /
plastic damage /
six-phase material /
polygonal random aggregate /
mesoscopic properties
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
References
[1] GENIKOMSOU A S,POLAK M A. Finite Element Analysis of Punching Shear of Concrete Slabs Using Damaged Plasticity Model in ABAQUS[J]. Engineering Structures,2015,98:38-48.
[2] ALFARAH B,ALMANSA F L,OLLER S. New Methodology for Calculating Damage Variables Evolution in Plastic Damage Model for RC Structures[J]. Engineering Structures Volume,2017,132:70-86.
[3] LEE J,FENVES G L. Plastic-damage Model for Cyclicloading of Concrete Structures[J]. Journal of Engineering Mechanics,1988,124(8):892-900.
[4] LUBLINER J,OLIVER J,OLIER S,el al. A Plastic Damage Model for Concrete[J]. International Journal of Solids and Structures,1989,25(3):299-326.
[5] LEE J,FENVESG L. Plastic-Damage Model for Cyclic Loading of Concrete Structures[J].Journal of Engineering Mechanics,1998,124(8):892-900.[6] GB 50010—2010,混凝土结构设计规范[S]. 北京:中国建筑工业出版社,2010.
[7] 张 劲,王庆扬,胡守营,等. ABAQUS 混凝土损伤塑性模型参数验证[J]. 建筑结构,2008(8):127-130.
[8] 杨 飞,董新勇,周沈华,等. ABAQUS混凝土塑性损伤因子计算方法及应用研究[J]. 四川建筑,2017,37(6):173-177.
[9] 刘 巍,徐 明,陈忠范. ABAQUS混凝土损伤塑性模型参数标定及验证[J]. 工业建筑,2014,44:167-171,213.
[10] SIDOROFF F. Description of Anisotropic Damage Application to Elasticity[M] //Physical Non-linearitis in Structural Analysis. Berlin,Heidelberg:Springer Berlin Heidelberg,1981:237-244.
[11] 王金昌,陈页开. ABAQUS在土木工程中的应用[M]. 杭州:浙江大学出版社,2006.
[12] 吕 钊,韩 芳,汪程凤,等. 混凝土二维骨料随机生成与投放程序开发[J]. 混凝土,2020(6):85-89.
[13] 郭利霞,钟 凌,郑璀莹,等. 基于改进随机骨料模型的含砖再生混凝土损伤破坏研究[J]. 应用基础与工程科学学报,2019,27(6):1390-1398.
[14] 杜 敏,金 浏,李 冬,等. 模型尺寸和骨料级配对混凝土细观非均质影响[J]. 应用基础与工程科学学报,2017,25(2):382-394.
[15] 肖建庄,李文贵,刘 琼. 模型再生混凝土单轴受压性能细观数值模拟[J]. 同济大学学报(自然科学版),2011,39(6):791-797.
[16] 刘 琼. 再生混凝土破坏机理的试验研究和格构数值模拟[D].上海:同济大学,2010.
[17] 韩玉舟,安旭文,肖 倍,等. 再生骨料混凝土单轴受压试验研究[J]. 长江科学院院报,2020,37(7):135-139,146.
PDF(9212 KB)
