Experimental study of the fatigue behavior of high strength concrete
Experimental study of the fatigue behavior of high strength concrete
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DOI：
10.1016/0008-8846(96)00151-2
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发表时间：
1996-10-01
影响因子：
11.4
通讯作者：
Kim, YY
中科院分区：
文献类型：
--
作者：
Kim, JK;Kim, YY
本文通过对不同强度水平的圆柱形混凝土试件的试验，研究了混凝土在受压状态下的疲劳性能。选定的试验变量为4个等级(26、52、84、103)的抗压强度和4个等级(75%、80%、85%、95%)的最大应力，160个试件(PHI100×200 mm)用于试验。疲劳强度的参考是在疲劳测试之前获得的极限静态强度。在疲劳试验过程中，试件的水分保持不变。在疲劳试验中，第一个循环以标准速率加载，其余循环以1赫兹的频率加载。试验结果表明，疲劳寿命随混凝土强度的增加而降低，提出了考虑混凝土强度影响的S-最大值-N-f关系模型。当高强混凝土的疲劳应变小于低强度混凝土时，高强混凝土的疲劳应变增量大于低强度混凝土。版权所有(C)1996爱思唯尔科学有限公司
In this study, cylindrical concrete specimens with various strength levels were tested to investigate the fatigue behavior of concrete in compression. Selected test variables were compressive strength with 4 levels (26 Mpa, 52 Mpa, 84 Mpa, 103 Mpa) and maximum stress with 4 levels (75%, 80%, 85%, 95%), 160 specimens (phi 100 x 200 mm) were cast for the test. The reference for the fatigue strength was the ultimate static strength acquired just before the fatigue testing. The moisture contents of specimens were preserved during the fatigue testing. In fatigue tests, the first cycle of loading was loaded at standard rate, and the other cycles were loaded in the frequency of 1 Hz. Test results show that the fatigue life decreased with increasing the concrete strength, and a model for S-max-N-f relationship considering the effect of the concrete strength was proposed. While fatigue strain of high strength concrete was smaller than that of low strength concrete, the rate of fatigue strain increment of high strength concrete was greater than that of low strength concrete. Copyright (C) 1996 Elsevier Science Ltd