About loading frequency and stress rate influences on fatigue strength of concrete
About loading frequency and stress rate influences on fatigue strength of concrete
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DOI：
10.1002/best.201200054
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发表时间：
2012-12-01
影响因子：
1.1
通讯作者：
Marx, Steffen
中科院分区：
文献类型：
--
作者：
Schneider, Sebastian;Voecker, Daniela;Marx, Steffen
关于加载频率和应力率对混凝土疲劳强度的影响混凝土的疲劳性能主要是在等幅试验的基础上研究的。在这些试验中，恒定的最大和最小应力施加到混凝土试样上。此外，还使用高加载频率，以最大限度地缩短测试时间。然而，加载频率对失效的加载循环次数有影响。文献中记载的疲劳试验研究表明，混凝土的疲劳强度取决于应变率，就像单次加载的抗压强度一样。考虑到这一点，可以将不同加载频率的测试结果相互转换。此外，可以根据应力范围确定频率极限。
About loading frequency and stress rate influences on fatigue strength of concrete The fatigue behavior of concrete is mostly studied on the basis of constant amplitude tests. Constant maximum and minimum stresses are applied to concrete specimens during these tests. In addition, high loading frequencies are used in order to minimize the test duration. However, the loading frequency has an influence on the number of load cycles to failure. A study of fatigue tests documented in the literature has shown that the fatigue strength of concrete depends on the strain rate like the compressive strength due to single loading. With this consideration it becomes possible to convert test results with different loading frequencies into each other. Furthermore, a frequency limit can be determined depending on the stress range.