| 宋来忠,彭 刚,姜袁.混凝土随机参数化骨料模型及加载的数值模拟[J].水利学报,2008,39(Z2): |
| 混凝土随机参数化骨料模型及加载的数值模拟 |
| The Numerical Simulation of Concrete Random Parameterized Aggregate Model and Load Test |
| 投稿时间：2008-12-09 修订日期：2010-07-05 |
| DOI： |
| 中文关键词: 细观层次 混凝土 随机模拟 有限元网格 参数化骨料 |
| 英文关键词: mesoscopic level concrete random simulation finite element mesh parameterized aggregate |
| 基金项目:国家自然科学基金项目（面上项目，重点项目，重大项目） |
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| 摘要点击次数: 1884 |
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| 中文摘要: |
| 在细观层次上研究混凝土，一般应将其视为一种由粗骨料、水泥砂浆以及二者间的粘结界面所组成的三相非均质复合材料。为此，在二维情形下，基于参数曲线的自由变形技术，将混凝土骨料及粘结界面的轮廓线用确定的、形式统一的参数方程予以表示，建立了混凝土二维随机参数化骨料数学模型。对骨料为卵石和碎石的混凝土，分别给出了级配、含量、配合比等可控制的随机混凝土数值试样。该数学模型较好地描述了骨料、砂浆与粘结界面组成的二维三相复合结构形式。最后，使用MATLAB、AutoCAD和ANSYS软件建立了有限元网格模型，并进行了数值加载试验。结果表明，该方法可较好地满足混凝土动静力学性能细观数值分析的要求。 |
| 英文摘要: |
| At the mesoscopic level, concrete is considered as the three-phase non-homogeneous composite materials composed of coarse aggregate, cement mortar and bonded interface between them. In the two-dimensional case, based on the technique of free-form deformation for parametric curves, the outline of every aggregate and interface is expressed by a defined and unified parametric equation, and then the concrete random parameterized aggregate model is established. When the concrete aggregate is gravel and crushed stone，the model gives a concrete random numerical structures with the controllable grade, content and rate of composite, and shows an advantage in describing two-dimensional three-phase composite materials formed the aggregate, mortar and bonding interface. At last, the finite element mesh model and numerical load test by axial compression and tension are given by MATLAB, AutoCAD and ANSYS. The results show that the method can satisfy the requirements of numerical analysis of the static and dynamic mechanical properties of concrete. |
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