| 考虑应变率效应的混凝土动力弹塑性损伤本构模型 |
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| 引用本文： | 吴建营,李杰.考虑应变率效应的混凝土动力弹塑性损伤本构模型[J].同济大学学报(自然科学版),2006,34(11):1427-1430,1440. |
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| 作者姓名： | 吴建营 李杰 |
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| 作者单位： | 1. 同济大学,土木工程学院,上海,200092;华南理工大学,土木系,广东,广州,510640
2. 同济大学,土木工程学院,上海,200092 |
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| 摘 要： | 通过对损伤能释放率阀值的Perzyna粘性规则化,将作者提出的混凝土静力弹塑性损伤本构模型进行了动力推广,并将二者统一为一类基于能量的弹塑性损伤本构模型.给出了建议模型的基本公式以及在不同应变率作用下混凝土材料的数值模拟结果.分析结果表明:建议模型能够很好地描述混凝土在不同应力状态下的各种典型非线性行为,包括动力作用下的应变率效应.
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| 关 键 词： | 混凝土 应变率 损伤力学 本构模型 动力荷载 |
| 文章编号： | 0253-374X（2006）11-1427-04 |
| 收稿时间： | 2005-03-31 |
| 修稿时间： | 2005-03-31 |
Elastoplastic Damage Constitutive Model for Concrete Considering Strain Rate Effect Under Dynamic Loading |
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| WU Jianying,LI Jie.Elastoplastic Damage Constitutive Model for Concrete Considering Strain Rate Effect Under Dynamic Loading[J].Journal of Tongji University(Natural Science),2006,34(11):1427-1430,1440. |
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| Authors: | WU Jianying LI Jie |
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| Abstract: | In this paper,the elastoplastic damage model for concrete under static loading previously proposed by the authors is generalized on the basis of the viscous regularization of Perzyna type.The primary formulations and the corresponding numerical algorithm are presented.Several simulation results of concrete under static and dynamic loadings are provided to demonstrate its capability of describing the typical nonlinear behaviors of concrete under general loading states,especially the effect of strain rate. |
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| Keywords: | concrete strain rate damage mechanics constitutive model dynamic loading |
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