| 混凝土循环加卸载动态损伤特性研究 |
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| 引用本文： | 胡海蛟, 彭刚, 谢玖杨, 王敏. 混凝土循环加卸载动态损伤特性研究[J]. 工程力学, 2015, 32(6): 141-145. DOI: 10.6052/j.issn.1000-4750.2013.12.1152 |
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| 作者姓名： | 胡海蛟 彭刚 谢玖杨 王敏 |
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| 作者单位： | 1.三峡地区地质灾害与生态环境湖北省协同创新中心,湖北,宜昌 443002;;2.三峡大学土木与建筑学院,湖北,宜昌 443002 |
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| 基金项目： | 国家自然科学基金项目(51279092); 三峡大学硕士学位论文培优基金项目(2013PY020); 三峡大学土木与建筑学院优秀硕士学位论文; 培育项目(PY201308) |
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| 摘 要： | 利用大型多功能动静力三轴仪对混凝土试件进行了5种应变速率下的动态循环加卸载压缩试验。对混凝土的物理力学参数的变化规律进行了统计分析。结果表明：峰值应力和弹性模量随加载速率的提高而增大,但峰值应变随加载速率的变化表现出较大的离散性。在此基础上,进一步研究了混凝土在不同加载速率下的刚度退化规律。最后,选用基于Weibull统计理论的分段式动态损伤本构模型对试验数据进行拟合。经验证,此模型能够较好的模拟混凝土材料的本构特性。
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| 关 键 词： | 混凝土 循环加卸载 刚度退化 损伤 本构模型 |
| 收稿时间： | 2013-12-11 |
| 修稿时间： | 2014-06-04 |
STUDY ON DYNAMIC BEHAVIOUR OF CONCRETE BY CYCLE LOADING AND UNLOADING CONDITIONS |
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| HU Hai-jiao, PENG Gang, XIE Jiu-yang, WANG Min. STUDY ON DYNAMIC BEHAVIOUR OF CONCRETE BY CYCLE LOADING AND UNLOADING CONDITIONS[J]. Engineering Mechanics, 2015, 32(6): 141-145. DOI: 10.6052/j.issn.1000-4750.2013.12.1152 |
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| Authors: | HU Hai-jiao PENG Gang XIE Jiu-yang WANG Min |
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| Affiliation: | 1.Collaborative Innovation Center of Geological Hazards and Ecological Environment in Three Gorges Area in Hubei Province, Yichang, Hubei 443002, China; College of Civil &Architecture, China Three Gorges University, Yichang, Hubei 443002, China |
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| Abstract: | The dynamic cyclic loading and unloading tests under five different loading rates are implemented with large multi-function static and dynamic force triaxial apparatus. The statistical analysis of the change rules about basic physical and mechanics parameters is carried out. The results show that the peak stress and the elastic modulus increase with the increase of loading rates, and that the peak strain has a large discreteness with the change of loading rates. On this basis, the stiffness degradation rule of concrete under different loading rates is further studied. Finally, a dynamic damage constitutive model based on Weibull statistical theory in a sectional form is selected for fitting the experimental data. It is verified that this model can simulate the constitutive properties of concrete material well. |
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| Keywords: | concrete cycle loading and unloading rigidity degeneration damage constitutive model |
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