| 混凝土化学-力学损伤本构模型 |
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| 引用本文： | 张研,张子明,邵建富. 混凝土化学-力学损伤本构模型[J]. 工程力学, 2006, 23(9): 153-156,183 |
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| 作者姓名： | 张研 张子明 邵建富 |
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| 作者单位： | 河海大学土木工程学院,南京,210098;里尔科技大学,里尔 59650,法国;河海大学土木工程学院,南京,210098;里尔科技大学,里尔 59650,法国 |
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| 摘 要： | 水使混凝土孔隙溶液中钙离子流失是混凝土结构力学性能劣化的重要原因。根据试验结果,提出了一个新的混凝土化学—力学损伤耦合本构模型,用各向同性损伤变量描述混凝土化学—力学损伤。混凝土孔隙中钙浓度满足钙离子质量守恒的非线性扩散方程。有限元计算和试验结果表明,计算值和试验数据吻合很好,提出的本构模型能较好地反映混凝土化学—力学损伤耦合作用。
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| 关 键 词： | 固体力学 化学-力学损伤 本构模型 混凝土 耐久性 耦合作用 |
| 文章编号： | 1000-4750（2006）09-0153-04 |
| 收稿时间： | 2004-12-11 |
| 修稿时间： | 2004-12-112005-03-19 |
CONSTITUTIVE MODEL OF CHEMICAL-MECHANICAL DAMAGE IN CONCRETE |
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| ZHANG Yan,ZHANG Zi-ming,SHAO Jian-fu. CONSTITUTIVE MODEL OF CHEMICAL-MECHANICAL DAMAGE IN CONCRETE[J]. Engineering Mechanics, 2006, 23(9): 153-156,183 |
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| Authors: | ZHANG Yan ZHANG Zi-ming SHAO Jian-fu |
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| Affiliation: | 1. Institute of Civil Engineering, Hohai Univ., Nanjing 210098, China; 2. Lille University of Science and Technology, Lille 59650 France |
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| Abstract: | Deterioration of mechanical behavior of concrete structures results from the leaching of calcium ion in concrete pore solution, which is caused by water. Based on the experimental data, a new coupled constitutive model of chemical-mechanical damage is presented. An isotropic damage variable is used to describe the chemical-mechanical damage. The calcium concentration in concrete pore solution satisfies the nonlinear diffusion equation of calcium mass conservation. The results of finite element computations and experiments demonstrate that the calculated values agree very well with the testing data and the model can describe the chemical-mechanical coupling effects fairly. |
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| Keywords: | solid mechanics chemical-mechanical damage constitutive model concrete durability coupling |
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