| 混凝土疲劳寿命的表征研究 |
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| 引用本文： | 易成,范永魁,朱红光,朱绪平. 混凝土疲劳寿命的表征研究[J]. 建筑材料学报, 2008, 11(2): 132-137 |
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| 作者姓名： | 易成 范永魁 朱红光 朱绪平 |
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| 作者单位： | 中国矿业大学,煤炭资源与安全开采国家重点实验室,北京,100083;中国矿业大学,煤炭资源与安全开采国家重点实验室,北京,100083;中国矿业大学,煤炭资源与安全开采国家重点实验室,北京,100083;中国矿业大学,煤炭资源与安全开采国家重点实验室,北京,100083 |
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| 摘 要： | 为了达到不损坏试件,却能估计出混凝土疲劳寿命的目的,对混凝土的弹性模量、泊松比、密度等参数对混凝土疲劳寿命离散性的影响进行了探讨.通过疲劳试验,筛选出最适合作为混凝土疲劳寿命预测指标的参数,由试验数据得出了混凝土疲劳变形发展第二阶段中塑性应变增长率与疲劳寿命关系的经验公式;提出了一种基于塑性应变增长率的混凝土疲劳寿命预测方法.经验证所得混凝土预测寿命与实测结果及前人试验结果均符合较好.
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| 关 键 词： | 混凝土 受压疲劳 塑性应变增长率 疲劳寿命 |
| 文章编号： | 1007-9629(2008)02-0132-06 |
| 修稿时间： | 2007-04-16 |
Characterization Study on Fatigue Life of Concrete under Uniaxial Compression |
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| YI Cheng,FAN Yong-kui,ZHU Hong-guang,ZHU Xu-ping. Characterization Study on Fatigue Life of Concrete under Uniaxial Compression[J]. Journal of Building Materials, 2008, 11(2): 132-137 |
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| Authors: | YI Cheng FAN Yong-kui ZHU Hong-guang ZHU Xu-ping |
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| Abstract: | In order to predict the surplus fatigue life of concrete under nondestructive condition,the effect of some parameters such as elastics modulus,Poisson's ratio and density of concrete on the fatigue life is discussed in this paper.According to the test results,the best parameter to predict the fatigue life is screened out from the parameters mentioned above.Then,an empirical formula is established to describe the relationship between fatigue life and the growth rate of plastic strain in the second stage for the fatigue deformation.Hence,a new method based on the growth rate of plastic strain is proposed to predict the surplus life of concrete.This new method is verified with actual test data from this paper as well as other reports. |
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| Keywords: | concrete compressive fatigue growth rate of plastic strain fatigue life |
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