孟德泉;应黎坪;杨欣欣;

• 1:北京工业大学建筑工程学院

摘要(Abstract)：

从细观角度分析再生混凝土的力学特性,以往都是将再生混凝土视为由骨料、新砂浆、新界面、老砂浆、老界面五相介质组成的复合材料来分析,为了简化这种常规五相再生混凝土模型,提出了基于界面等效模型的再生混凝土基面力元分析方法。首先运用三相球理论模型将再生混凝土中的老砂浆、新界面、老界面三相介质等效成一种介质,得到三相介质的再生混凝土界面等效模型;然后利用势能原理的基面力元法编制出损伤基面力元程序,对不同尺寸的再生混凝土试块进行单轴拉伸试验模拟。给出了应力-应变曲线及破坏过程图,并与普通五相模型进行了对比,两种曲线基本吻合。因此,等效模型可以代替普通五相模型,从而简化多相再生混凝土的损伤分析,提高模拟效率。

关键词(KeyWords)： 混凝土与钢筋混凝土结构;再生混凝土;三相球模型;界面等效模型;基面力元法

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 孟德泉;应黎坪;杨欣欣;

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参考文献(References)：

• [1]SCHLANGEN E,GARBOCZI E J.Fracture simulations of concrete using lattice models:Computational aspects[J].Engineering Fracture Mechanics,1997,57(2/3):319-332.
• [2]ZDENEK P B,TABBARA M R,KAZEMI M T,et al.Random particle model for fracture of aggregate or fiber composites[J].Journal of Engineering Mechanics,1990,116(8):1686-1705.
• [3]MOHAMED A R,HANSEN W.Micromechanical modeling of crack-aggregate interaction in concrete materials[J].Cement&Concrete Composites,1999,21(5/6):349-359.
• [4]刘光廷,王宗敏.用随机骨料模型数值模拟混凝土材料的断裂[J].清华大学学报(自然科学版),1996,36(1):84-89.LIU Guangting,WANG Zongmin.Numerical simulation study of fracture of concrete materials using random aggregate model[J].Journal of Tsinghua University(Science and Technology),1996,36(1):84-89.
• [5]彭一江,黎保琨,刘斌.碾压混凝土细观结构力学性能的数值模拟[J].水利学报,2001,32(6):19-22.PENG Yijiang,LI Baokun,LIU Bin.Numerical simulation of meso-level mechanical properties of roller compacted concrete[J].Journal of Hydraulic Engineering,2001,32(6):19-22.
• [6]马怀发,陈厚群,黎保琨.混凝土试件细观结构的数值模拟[J].水利学报,2004,35(10):27-35.MA Huaifa,CHEN Houqun,LI Baokun.Meso-structure numerical simulation of concrete specimens[J].Journal of Hydraulic Engineering,2004,35(10):27-35.
• [7]杜成斌,尚岩.三级配混凝土静、动载下力学细观破坏机制研究[J].工程力学,2006,23(3):141-146.DU Chengbin,SHANG Yan.Study on micro-mechanical failure mechanism of the three-gradation concrete under static and dynamic loadings[J].Engineering Mechanics,2006,23(3):141-146.
• [8]朱万成,唐春安,赵文,等.混凝土试样在静态载荷作用下断裂过程的数值模拟研究[J].工程力学,2002,19(6):148-153.ZHU Wancheng,TANG Chun’an,ZHAO Wen,et al.Numerical simulation on the fracture process of concrete specimen under static loading[J].Engineering Mechanics,2002,19(6):148-153.
• [9]唐春安,朱万成.混凝土损伤与断裂-数值试验[M].北京:科学出版社,2003.
• [10]ESHELBY J D.The determination of the elastic field of an ellipsoidal inclusion,and related problems[J].Proceedings of the Royal Society of London,1957,241(1226):376-396.
• [11]ESHELBY J D.The elastic field outside an ellipsoidal inclusion[J].Proceedings of the Royal Society of London,1959,252(1271):561-569.
• [12]HANSEN T C.Cracking and fracture of concrete and cement paste[J].Compressive Strength,1968,31(20):43-66.
• [13]MORI T,TANKA K.Average stress in matrix and average of material with misfitting inclusions[J].Acta Metallurgica,1973,21(5):571-574.
• [14]BENVENISTE Y.A new approach to the application of MoriTanaka’s theory in composite materials[J].Mechanics of Materials,1987,6(2):147-157.
• [15]RAO M P.Mechanics of composite materials[J].Journal of Polymer Science Part C Polymer Letters,1980,18(10):688.
• [16]卢子兴,黄筑平,王仁.基于三相球模型确定泡沫塑料有效模量[J].固体力学学报,1996,42(2):95-102.LU Zixing,HUANG Zhuping,WANG Ren.Determination of effective moduli for foam plastics based on three phase spheroidal model[J].Acta Mechanica Solida Sinica,1996,42(2):95-102.
• [17]DU Xiuli,JIN Liu.Research on effective mechanical properties of concrete composite material with pores[J].Engineering Mechanics,2012,29(6):70-77.
• [18]DU Xiuli,JIN Liu.Research on the influence of interfacial transition zone on the macro-mechanical properties of concrete[J].Engineering Mechanics,2012,29(12):72-79.
• [19]GAO Yuchen.A new description of the stress state at a point with applications[J].Archive of Applied Mechanics,2003,73(3/4):171-183.
• [20]PENG Yijiang,LIU Yinghua.Base force element method of complementary energy principle for large rotation problems[J].Acta Mechanica Sinica,2009,25(4):507-515.
• [21]PENG Yijiang,CHU Hao,PU Jiwei.Numerical simulation of recycled concrete using convex aggregate model and base force element method[J].Advances in Materials Science and Engineering,2016,2016(1):1-10.
• [22]曹瑜斌.再生混凝土多重界面显微结构研究[D].青岛:青岛理工大学,2016.CAO Yubin.Study on Microstructure of Recycled Concrete Interface[D].Qingdao:Qingdao University of Technology,2016.
• [23]肖建庄,刘琼,李文贵,等.再生混凝土细微观结构和破坏机理研究[J].青岛理工大学学报,2009,30(4):24-30.XIAO Jianzhuang,LIU Qiong,LI Wengui,et al.On the micro-and meso-structure and failure mechanism of recycled concrete[J].Journal of Qingdao University of Technology,2009,30(4):24-30.
• [24]李文贵,肖建庄,黄靓,等.再生混凝土界面过渡区纳观力学性能试验研究[J].湖南大学学报(自然科学版),2014,41(12):31-39.LI Wengui,XIAO Jianzhuang,HUANG Liang,et al.Experimental study on mechanical properties of interfacial transition zones in recycled aggregate concrete[J].Journal of Hunan University(Natural Science),2014,41(12):31-39.
• [25]SIMEONOV P,AHMAD S.Effect of transition zone on the elastic behavior of cement-based composites[J].Cement&Concrete Research,1995,25(1):165-176.
• [26]LEE K M,PARK J H.A numerical model for elastic modulus of concrete considering interfacial transition zone[J].Cement&Concrete Research,2008,38(3):396-402.
• [27]GB 50204—2011,混凝土结构工程施工质量验收规范[S].
• [28]肖建庄,兰阳.再生混凝土单轴受拉性能试验研究[J].建筑材料学报,2006,9(2):154-158.XIAO Jianzhuang,LAN Yang.Investigation on the tensile behavior of recycled aggregate concrete[J].Journal of Building Materials,2006,9(2):154-158.