摘要
为了在细观层次上进行混凝土数值模拟,将混凝土视为骨料、砂浆以及二者之间的界面层组成的非均匀复合材料,利用Matlab编程语言结合蒙特卡罗方法实现了混凝土细观结构三维球形随机骨料模型的自动生成,并通过四级配混凝土骨料生成投放试验和三级配混凝土劈拉试验进行了验证。结果表明,所建模型骨料投放含量能达到58%左右,可满足大体积、全级配混凝土的骨料投放模拟。
For performing numerical simulations of concrete at the mesoscopic level,concrete is treated as a composite material consisting of coarse aggregate,mortar matrix,and interfacial zones between the coarse aggregate and the mortar matrix.Three-dimensional geometrical models with spherical aggregate particles are automatically generated by using Monte Carlo＇s simulation method in Matlab.The generated geometrical models are then meshed by the finite element method to compute the properties of concrete.Numerical examples including the take-and-place process of the random aggregate particles of four-graded concrete and the splitting test on cube specimen of three-graded concrete are provided to demonstrate the effectiveness and robustness of the proposed method.The results show that a mesostructure with 58%volume fraction of aggregate particles can be obtained readily and the proposed model can meet the requirements of numerical modeling for massive concrete.
出处
《水电能源科学》
北大核心
2014年第11期124-128,共5页
Water Resources and Power
基金
国家自然科学基金项目(51269007)
关键词
混凝土
数值模拟
细观力学
球形随机骨料
concrete
numerical simulation
micromechanics
sphere random aggregate
