| 宋来忠,彭 刚,姜 袁.混凝土三维随机参数化骨料模型[J].水利学报,2012,43(1): |
| 混凝土三维随机参数化骨料模型 |
| A three-dimensional model for concrete with random parameterized irregular aggregate |
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| DOI： |
| 中文关键词: 细观层次 随机模拟 混凝土 不规则骨料 黏结界面 |
| 英文关键词: mesoscopic level random simulation concrete irregular aggregate interface |
| 基金项目: |
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| 摘要点击次数: 3325 |
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| 中文摘要: |
| 在三维情形下，基于参数曲面的自由变形技术，将混凝土骨料及黏结界面，用确定的、形式统一的参数方程予以表示，建立了混凝土随机参数化骨料数学模型；以骨料为卵石的混凝土为例，给出了级配、配合比等都可控制的骨料含量超过50% 的随机混凝土数值试样，提出了用参数映射法对试件进行有限元网格剖分的方法。该数学模型较好地描述了骨料、砂浆与黏结界面组成的三维三相复合结构形式，为进一步在细观层次上研究和确定混凝土的动力学性能打下了基础。 |
| 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 three-di -mensional case，based on the technique of free-form deformation for parametric surfaces，the every aggregate and interface is expressed by a defined and unified parametric equation ，and then the concrete random parameterized aggregate model has been established. When the concrete agg-regate is gravel ，the model gives a concrete random numerical structures （more than 50% aggregate content）with the controllable grade，content and rate of composite. The finite element mesh generate method is proposed by use the parameter mapping method ，and shows an advantage in describing three-dimensional three-phase composite materials formed the aggregate ，mortar and bonding interface，which presents a theoretical basis for further research on dynamic mechanical performance of concrete in the mesoscopic level. |
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