| 张林,徐进,陈新,谢嘉琼.碾压混凝土断裂试验研究[J].水利学报,2001,32(5):0045-0050 |
| 碾压混凝土断裂试验研究 |
| Experimental study on fracture of roller compacted concrete |
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| DOI： |
| 中文关键词: 碾压混凝土 断裂韧度 断裂能 光纤传感 裂缝 |
| 英文关键词: roller compacted concrete fracture toughness fracture energy fiber-optic sensor fracture |
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| 中文摘要: |
| 本文为研究碾压混凝土断裂特性，对沙牌拱坝碾压混凝土试件进行了三点弯曲梁断裂试验和剪切断裂试验研究，获得了试件的断裂韧度KⅠC、KⅡC和断裂能GF。试验中应用光纤传感检测技术，对试件开裂进行监测，研究结果表明，经处理后的二次涂覆单模光纤对碾压混凝土试件的开裂较敏感，当试件开裂时光强突变减弱，随着裂缝开度增大光强逐渐降低，试件断裂时光纤断裂。光纤的埋设工艺是实用上需要研究解决的重要技术环节。 |
| 英文摘要: |
| Three-point bending and shear fracture tests are conducted to study the fracture properties of RCC.Fracture toughness KⅠC,KⅡC and fracture energy Gf are obtained.Fiber-optic technique is applied to measure the fracture process of specimens.It is shown that the twicepasted optic fiber after treatment is sensitive to the splitting of specimen.The light intensity decreases with the opening of the fracture.The fiber breaks when the specimen is broken.The installation technique is crucial for the practical usage of optical fiber. |
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