| 碾压混凝土直剪试件细观结构的数值模拟 |
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| 引用本文： | 彭一江,黎保琨,屈彦玲.碾压混凝土直剪试件细观结构的数值模拟[J].三峡大学学报(自然科学版),2003,25(6):492-494,561. |
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| 作者姓名： | 彭一江 黎保琨 屈彦玲 |
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| 作者单位： | 1. 北方交通大学,北京,100044;北京工业大学,北京,100044
2. 北京工业大学,北京,100044 |
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| 摘 要： | 从细观层次上将碾压混凝土试件当作是由硬化水泥粉煤灰砂浆、粗骨料、二者间的粘结带以及水泥砂浆中间层面组成的非均质复合材料，由随机骨料模型模拟碾压混凝土的细观结构，用非线性有限元法模拟试件在直剪作用下的细观损伤断裂，从而求得其宏观抗剪断强度，计算结果与《混凝土重力坝设计规范》所提供的参考值较为吻合，据此还进行了试件破坏机理分析，应用此种计算方法，可节省直剪试验工作量，并可进行直剪试件的尺寸效应分析，有广阔的应用前景。
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| 关 键 词： | 碾压混凝土 直剪试验 细观结构 数值模拟 粉煤灰砂浆 碾压混凝土坝 |
| 文章编号： | 1007-7081(2003)06-0492-03 |
Numerical Simulation of Shear Test of Specimen Roller Compacted Concrete on Meso-Level |
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| Peng Yijiang Li Baokun Qu Yanling.Numerical Simulation of Shear Test of Specimen Roller Compacted Concrete on Meso-Level[J].Journal of China Three Gorges University(Natural Sciences),2003,25(6):492-494,561. |
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| Authors: | Peng Yijiang Li Baokun Qu Yanling |
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| Abstract: | The RCC is taken as two-phase composites consisting of mortar smut matrix, aggregate and bond between matrix and aggregate on meso-level. This random aggregate model is used to simulate the structure of RCC. The propagation processes of cracks and the mechanical properties of RCC in shear test are simulated u-sing finite element method. The simulation results agree with the Design Specification and test results. This numerical method is a new conception for investigating fracture mechanism and mechanical properties of RCC. |
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| Keywords: | roller compacted concrete (RCC) shear test meso-level numerical simulation |
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