| 循环加载历史对混凝土断裂特性影响的试验研究 |
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| 引用本文： | 林皋 周洪涛. 循环加载历史对混凝土断裂特性影响的试验研究[J]. 水利学报, 1994, 0(5): 25-30,44 |
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| 作者姓名： | 林皋 周洪涛 |
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| 作者单位： | 大连理工大学土木系 |
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| 摘 要： | 本文研究了循环加载历史对混凝土断裂韧度及断裂能的影响。用楔入劈拉试验对混凝土试块施加频率为１０Ｈｚ的高频预加拉伸荷载，测出荷载－位移全过程曲线，通过与未承受加载历史的混凝土准静态断裂参数比较，发现当预加拉伸荷载强度超过一特定值后，混凝土的抗裂能力显著降低，因此，混凝土的断裂参数不是独立于加载历史的物理量。
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| 关 键 词： | 混凝土 断裂特性 循环加载 |
Experimental study of the effect of cyclic loading history on the fracture properties of concrete |
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| Lin Gao, Zhou Hongtao, Huang Chengkui. Experimental study of the effect of cyclic loading history on the fracture properties of concrete[J]. Journal of Hydraulic Engineering, 1994, 0(5): 25-30,44 |
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| Authors: | Lin Gao Zhou Hongtao Huang Chengkui |
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| Affiliation: | Dalian University of Technology |
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| Abstract: | This paper reports the results of an experimental study of the effect of cyclic loading history on the fracture toughness and fracture energy of concrete. Wedge splitting test with 20cm notched concrete cubes preloaded by 10 Hz cyclic tension has been carried out and the load -displacement diagrams are obtained. In comparison with the results of quasi-static test where no preload was applied, it was found that the fracture strength of concrete noticeably decreased if the preloading capacity greater than a certain threshold value. Hence. it is concluded that the fracture parameter of concrete are not independent of loading history. |
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| Keywords: | wedge splitting test loading history fracture energy fracture toughness |
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