| 混凝土轴拉疲劳试验及损伤模型 |
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| 引用本文： | 吕培印,宋玉普,李庆斌. 混凝土轴拉疲劳试验及损伤模型[J]. 水利学报, 2002, 33(12): 0079-0084 |
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| 作者姓名： | 吕培印 宋玉普 李庆斌 |
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| 作者单位： | 1. 清华大学水利系,北京,100084
2. 大连理工大学,海岸与近海工程国家重点实验室,辽宁,大连,116024 |
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| 基金项目： | 国家自然科学基金项目(50078010) |
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| 摘 要： | 基于室内试验，研究了混凝土在等幅和变幅重复荷载作用下的轴拉疲劳性能。由等幅疲劳残余应变，定义了损伤变量，得到了相应的损伤积累和演化规律。依据损伤演变与损伤状态、加载条件间的相关性，建立了相应的疲劳损伤模型。并用变幅疲劳试验结果验证了模型的有效性。与其它模型相比，该模型具有较高的精度。
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| 关 键 词： | 混凝土；轴拉疲劳；损伤模型；寿命预测 |
| 文章编号： | 0559-9350(2002)12-0079-06 |
| 修稿时间： | 2002-10-11 |
Fatigue tests and damage model of concrete under axial tension |
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| LU Pei-yin,SONG Yu-pu,LI Qing-bin. Fatigue tests and damage model of concrete under axial tension[J]. Journal of Hydraulic Engineering, 2002, 33(12): 0079-0084 |
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| Authors: | LU Pei-yin SONG Yu-pu LI Qing-bin |
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| Abstract: | The fatigue behavior of concrete under axial tension with constant and variable amplitude cyclic loading is investigated. The damage variable is defined as the residual strain of concrete under constant amplitude fatigue loading, and the law of cumulative damage and its evolution are obtained. According to the correlation between accumulative damage and loading level the fatigue damage model is established. The validity of the model is verified by the test results of variable amplitude loading. The accuracy of the model proposed is higher than other models. |
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| Keywords: | concrete fatigue axial tension damage model life prediction |
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