| 混凝土单轴受压本构关系的概率密度描述 |
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| 引用本文： | 曾莎洁,李杰.混凝土单轴受压本构关系的概率密度描述[J].同济大学学报(自然科学版),2010,38(6):798-804. |
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| 作者姓名： | 曾莎洁 李杰 |
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| 作者单位： | 同济大学,土木工程学院,上海,200092 |
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| 基金项目： | 国家自然科学创新研究群体基金资助项目，国家自然科学基金重点资助项目 |
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| 摘 要： | 利用混凝土材料的细观随机损伤物理模型获取混凝土应力—应变关系的概率密度描述.以细观物理模型为基础,利用K-L(Karhunen-Loeve)正交分解和密度演化方法得到了单轴受力状态任意应变处应力的概率密度函数估计.将数值计算结果与试验结果进行概率密度层次的对比.研究证实:可以采用这一方法描述混凝土受力本构关系的概率密度演化过程.
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| 关 键 词： | 混凝土 随机损伤演化 K-L(Karhunen-Loeve)分解 密度演化方法 |
| 收稿时间： | 3/26/2009 8:40:31 PM |
| 修稿时间： | 2010/3/17 0:00:00 |
Analysis on Constitutive Law of Plain Concrete Subjected to Uniaxial Compressive Stress Based on Generalized Probability Density Evolution Method |
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| ZENG Shajie and LI Jie.Analysis on Constitutive Law of Plain Concrete Subjected to Uniaxial Compressive Stress Based on Generalized Probability Density Evolution Method[J].Journal of Tongji University(Natural Science),2010,38(6):798-804. |
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| Authors: | ZENG Shajie and LI Jie |
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| Institution: | College of Civil Engineering, Tongji University, Shanghai 200092, China;College of Civil Engineering, Tongji University, Shanghai 200092, China |
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| Abstract: | Efforts are made to grasp the probability information of the stress strain relationship.Firstly,a class of mesoscopic damage mechanics models of concrete is listed to understand the mesoscopic damage evolution characteristics of concrete material.Then the Karhunen-Loeve orthogonal decomposition is adopted to simulate the stochastic field mentioned in the former model.Based on the generalized probability density evolution method (PDEM),probability density function (PDF) of stress strain relationship in unaxial loading condition and its evolution are provided.In the end,the comparison between the theoretical and experimental results verifies that the probability density evolution process of constitutive relationship for concrete material can be obtained from this method. |
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| Keywords: | concrete stochastic damage evolution K-L orthogonal decomposition probability density evolution method |
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