| 基于应变空间的碾压混凝土各向异性损伤本构模型 |
| |
| 引用本文： | 刘海成, 宋玉普, 吴智敏, 张宇鑫. 基于应变空间的碾压混凝土各向异性损伤本构模型[J]. 工程力学, 2004, 21(6): 149-155. |
| |
| 作者姓名： | 刘海成 宋玉普 吴智敏 张宇鑫 |
| |
| 作者单位： | 1.大连理工大学海岸和近海工程国家重点实验室, 大连, 116024;2. 上海师范大学建筑与管理工程学院, 上海, 201418 |
| |
| 基金项目： | 国家自然科学基金项(50179002) |
| |
| 摘 要： | 根据碾压混凝土材料的力学特性和损伤拉压显著不同的特点,分别在拉应变和压应变空间建立了碾压混凝土的本构关系和损伤演化方程.在拉应变空间,碾压混凝土的变形特性表现为脆弹性,考虑弹性与损伤耦合,应用正交各向异性损伤理论描述碾压混凝土的刚度退化和应变软化;在压应变空间,考虑弹塑性与损伤耦合,应用内时理论来描述碾压混凝土的弹塑性特性,正交各向异性损伤理论来描述微裂缝扩展引起的刚度退化和应变软化,内时理论没有屈服面,使模型的参数和方程大大减少,从而简化了非线性计算过程.计算结果表明,该模型能够较好地描述碾压混凝土在单轴和多轴加载下的性质.
|
| 关 键 词： | 碾压混凝土 本构模型 应变空间 正交各向异性损伤 内时理论 |
| 文章编号： | 1000-4750(2004)06-0149-07 |
| 收稿时间： | 2003-02-28 |
| 修稿时间： | 2003-11-20 |
ANISOTROPIC DAMAGE CONSTITUTIVE MODEL FOR ROLLER COMPACTED CONCRETE IN STRAIN SPACE |
| |
| LIU Hai-cheng, SONG Yu-pu, WU Zhi-min, ZHANG Yu-xin. ANISOTROPIC DAMAGE CONSTITUTIVE MODELFOR ROLLER COMPACTED CONCRETE IN STRAIN SPACE[J]. Engineering Mechanics, 2004, 21(6): 149-155. |
| |
| Authors: | LIU Hai-cheng SONG Yu-pu WU Zhi-min ZHANG Yu-xin |
| |
| Affiliation: | 1.State Key Laboratory of Coastal Offshore Engineering, Dalian University of Technology, Dalian, 116024, P. R. China;2. Architecture engineering School, Shanghai Normal University, Shanghai, 201418, P. R. China |
| |
| Abstract: | The constitutive laws and damage evolution equations of Roller Compacted Concrete (RCC) are established in tensile and compressive strain spaces, respectively. In tensile strain space where the material is elasto-brittle, the coupling of elasticity and damage is considered and the behavior of stiffness degeneration and strain softening is described by orthotropic damage theory. In compressive strain space where the material is elasto-plastic, the elasto-plasticity is described by endochronic theory and the behavior of stiffness degeneration and strain softening due to microcrack propagation is described by orthotropic damage theory. No yield surface is needed in endochronic theory, hence the number of parameters and equations in the model is reduced significantly and the nonlinear calculation is simplified. Good agreement is observed between the predicted values using the proposed model and the experimental results of RCC under uniaxial and multiaxial loading. |
| |
| Keywords: | roller compacted concrete constitutive model strain space orthotropic damage endochronic theory |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《工程力学》浏览原始摘要信息 |
|
点击此处可从《工程力学》下载全文 |
|
