| 低频周期荷载下广义Kelvin-Voigt模型特性研究 |
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| 引用本文： | 黄明,刘新荣,祝云华,钟祖良.低频周期荷载下广义Kelvin-Voigt模型特性研究[J].岩土力学,2009,30(8):2300-2304. |
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| 作者姓名： | 黄明 刘新荣 祝云华 钟祖良 |
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| 作者单位： | 重庆大学 土木工程学院，重庆 400045 |
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| 基金项目： | 国家自然科学基金重点项目资助，重庆大学研究生科技创新基金 |
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| 摘 要： | 不考虑低频简谐荷载作用下材料的疲劳破坏，并假定周期应力幅值恒定，从材料流变特性的宏观角度建立了广义Kelvin-Voigt体的正弦加载蠕变模型，并对模型特性进行分析。结果表明：与相同静载应力下（与动荷载应力最大值相等）广义Kelvin-Voigt体蠕变模型相比，蠕变变化规律相似，但动载初始蠕变阶段和稳定蠕变阶段的变形值小于静蠕变，且初始蠕变段经历时间比静蠕变短，此结论与相关文献试验结果相似；动载周期越大，则初始蠕变段经历时间越长，蠕变长期应变值越大。
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| 关 键 词： | 蠕变模型 周期荷载 黏弹性 静蠕变 |
| 收稿时间： | 2008-09-12 |
A study of behaviors of generalized Kelvin-Voigt model under low frequency cyclic load |
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| HUANG Ming,LIU Xin-rong,ZHU Yun-hua,ZHONG Zu-liang.A study of behaviors of generalized Kelvin-Voigt model under low frequency cyclic load[J].Rock and Soil Mechanics,2009,30(8):2300-2304. |
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| Authors: | HUANG Ming LIU Xin-rong ZHU Yun-hua ZHONG Zu-liang |
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| Institution: | College of Civil Engineering, Chongqing University, Chongqing 400045, China |
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| Abstract: | The generalized Kelvin-Voigt creep model under sinusoidal load is established from a macro perspective of the rheological characteristics of materials; and the model characters are also analyzed in the suppositional condition that the fatigue failure of material under low frequency harmonic loading is neglected and the cyclic stress range is constant. The results indicate that change law of dynamic creep model is the same as that of statistic creep model, of which the loading is as much as the maximum of dynamic loading; and dynamic creep strain is smaller than that of statistic creep during the initial stage and stable stage; which are similar to the test results in references. In addition, the longer the cycle of dynamic load is, the longer the time of initial creep stage is and the larger the long-term strain is. |
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| Keywords: | creep model cyclic loading viscoelasticity statistic creep |
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