摘要
通过对再生混凝土粗骨料成份的分析,初步提出将再生粗骨料大致分为以附着砂浆石子为主要成分并含有少量砂浆块和砖块杂质,并确定某批次再生粗骨料中各类骨料的百分含量。应用ANSYS的APDL参数化编程,结合蒙特卡罗方法和富勒级配理论,从细观层次上生成再生混凝土各类骨料的二维圆形与三维球形随机骨料模型,并赋予各类骨料的材料属性。然后根据选定的单元类型进行有限元网格的划分,通过判断各单元与骨料形心的位置关系来识别砂浆基质与骨料之间的界面单元,并赋予它相应的材料属性。从而建立起再生混凝土的数值模拟试件,为今后在ANSYS中直接对其进行加载求解,以此来模拟各种力学性能试验提供了必要的基础。
In this paper, by the analysis of the composition of coarse aggregate of recycled concrete, the initial proposal is that dividing the recycled coarse aggregate into three types of mortar attached to stone, mortar and brick, and determining the percentage content of the various aggregate of a batch of recycled coarse aggregate. Using Ansys Parameter Design Language combined with Monte Carlo Method and Fuller Gradation Theory, generate various random aggregate model of 2D circular and 3D sphere from nficro-level, and give them proper-ties of materials. Then using the selected finite element to mesh division, through the relationship between the each element and the centroid position of aggregate to identify the interface, and give it the material properties. Finally, establishing the numericad simulation of recycled aggregate concrete for directly loading and solving by ANSYS, which provides the necessary foundation to simulate a variety of mechanical performance test.
出处
《价值工程》
2010年第35期158-159,共2页
Value Engineering
