| 沥青混合料损伤蠕变模型试验研究 |
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| 引用本文： | 曾国伟,杨新华,尹安毅,磨季云.沥青混合料损伤蠕变模型试验研究[J].武汉科技大学学报(自然科学版),2011(5). |
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| 作者姓名： | 曾国伟 杨新华 尹安毅 磨季云 |
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| 作者单位： | 武汉科技大学冶金工业过程系统科学湖北省重点实验室;华中科技大学土木与力学学院; |
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| 基金项目： | 国家自然科学基金资助项目(51004079); 湖北省教育厅科技项目(B20111102); 武汉科技大学校基金资助项目(2010xz020) |
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| 摘 要： | 在三元件黏弹性模型基础上耦合一个连续性损伤因子,构建一个能够描述沥青混合料三阶段蠕变全过程的损伤蠕变模型。综合考虑黏弹性特性与损伤机制,推导了该模型的本构方程,分析了沥青混合料的蠕变特性。通过沥青混合料在不同应力水平下的单轴压缩蠕变实验,编制非线性拟合程序,得到模型参数和损伤演化曲线。将不同应力条件下模型预测值与实验结果进行对比,结果表明,该模型能准确反映不同应力水平下沥青混合料蠕变过程三个阶段的特征和进入破坏阶段的临界时间。
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| 关 键 词： | 沥青混合料 损伤蠕变模型 蠕变实验 |
Experimental researches on damage creep model of asphalt mixture |
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| Zeng Guowei,Yang Xinhua,Yin Anyi,Mo Jiyun.Experimental researches on damage creep model of asphalt mixture[J].Journal of Wuhan University of Science and Technology(Natural Science Edition),2011(5). |
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| Authors: | Zeng Guowei Yang Xinhua Yin Anyi Mo Jiyun |
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| Institution: | Zeng Guowei1,2,Yang Xinhua2,Yin Anyi2,Mo Jiyun1 (1.Hubei Province Key Laboratory of Systems Science in Metallurgical Process,Wuhan University of Science and Technology,Wuhan 430065,China,2.School of Civil Engineering and Mechanics,Huazhong University of Science and Technology,Wuhan 430074,China) |
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| Abstract: | Based on coupling a continuum damage factor,a damage rheological model of asphalt mixture that can describe total creep behavior is presented in this paper.A constitutive equation of the model is established with the viscoelastic characteristics and damage taken into account.Through uniaxial creep experiments under different stress amplitudes,nonlinear fitting program is worked out,the model parameters calibrated,and the curves of damage evolution obtained.The comparison between the model and experiment dat... |
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| Keywords: | asphalt mixture damage creep model creep experiment |
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