| 沥青混凝土弯曲疲劳试验疲劳损伤分析 |
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| 引用本文： | 周志刚,张清平,袁秀湘.沥青混凝土弯曲疲劳试验疲劳损伤分析[J].中南大学学报(自然科学版),2011,42(6). |
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| 作者姓名： | 周志刚 张清平 袁秀湘 |
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| 作者单位： | 长沙理工大学道路结构与材料交通行业重点实验室,湖南长沙,410004 |
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| 基金项目： | 国家自然科学基金资助项目(50778027)；湖南省自然科学基金资助项目 |
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| 摘 要： | 针对现有沥青混合料疲劳损伤试验时直接依据刚度或模量计算损伤值而无法真实反映材料微观损伤特性的不足，提出应用反分析方法以得到沥青混凝土的疲劳损伤演化规律。其步骤是：根据沥青混凝土疲劳损伤模型，得到三点弯曲梁试件疲劳损伤力学理论经典解;根据疲劳试验数据确定沥青混凝土材料疲劳损伤模型中的特征参数。应用非线性有限元方法，模拟计算并分析试件疲劳损伤过程中的弯拉应力、挠度、损伤变量、裂纹扩展速率等的变化规律，并预测沥青混凝土试件疲劳寿命及失稳断裂时的裂纹长度。研究结果表明：疲劳寿命的数值模拟结果与试验结果较吻合，证明了所提出的沥青混凝土疲劳损伤模型的合理性和有效性。
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| 关 键 词： | 沥青混凝土 弯曲疲劳试验 非线性疲劳损伤 仿真 |
Fatigue damage analysis of aspahlt mixture specimen during cyclic bending test |
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| ZHOU Zhi-gang,ZHANG Qing-ping,YUAN Xiu-xiang.Fatigue damage analysis of aspahlt mixture specimen during cyclic bending test[J].Journal of Central South University:Science and Technology,2011,42(6). |
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| Authors: | ZHOU Zhi-gang ZHANG Qing-ping YUAN Xiu-xiang |
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| Institution: | ZHOU Zhi-gang,ZHANG Qing-ping,YUAN Xiu-xiang (Key Laboratory of Road Structure and Material,Ministry of Transport,Changsha University of Science and Technology,Changsha 410004,China) |
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| Abstract: | Based on the fact that damage index is calculated using stiffness or modulus directly in fatigue damage experiment for asphalt mixture and it is unable to reveal the reality of asphalt mixture's micro-damage characteristic,the back-analysis method was suggested to determine the fatigue damage characteristic of asphalt mixture.At first,the classic fatigue damage theorical solution of beam specimen during three points bending test was deduced using the fatigue damage model suggested for asphalt mixture,and th... |
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| Keywords: | asphalt mixture cyclic bending test nonlinear fatigue damage simulation |
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