| 邓宗才,钱在兹.短碳纤维混凝土低周疲劳断裂特性的试验研究[J].水利学报,2000,31(9):0037-0044 |
| 短碳纤维混凝土低周疲劳断裂特性的试验研究 |
| Experimental study on low cycle fatigue fracture properties of carbon fiber reinforced concrete |
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| DOI： |
| 中文关键词: 断裂 疲劳 碳纤维混凝土 |
| 英文关键词: fracture fatigue carbon fiber reinforced concrete |
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| 摘要点击次数: 1840 |
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| 中文摘要: |
| 对于碳纤维混凝土带切口三点弯曲梁试件，测定了其在静载下的断裂参数，用测定柔度的方法研究了循环加载历史对碳纤维混凝土断裂参数的影响规律，试验研究了碳纤维混凝土的疲劳断裂特性。试验结果表明：当预疲劳加载幅值超过某一阈值后，碳纤维混凝土的断裂参数有所降低，这些参数是与预疲劳幅值有关的物理量，裂缝亚临界扩展长度与疲劳寿命无关，碳纤维混凝土的疲劳断裂寿命是素混凝土的2.1～2.8倍，能量吸收是素混凝土的9.5～13.2倍。 |
| 英文摘要: |
| The fracture parameters and low cycle fatigue fracture properties of carbon fiber reinforced concrete is investigated under static load using three point bending beam test method. The influence of loading history on fracture mechanism is studied by using the method for compliance calibration. The results show that the fracture parameters will be noticeably reduced if the pre loading strength is higher than a certain threshold. While the crack propagation length is independent of the fatigue life. The carbon fiber has a considerable beneficial effect on the behavior of concrete in against fatigue. |
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