| 活性粉末混凝土为基底材料的断裂和疲劳试验研究 |
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| 引用本文： | 周瑞忠,姚志雄,石成恩.活性粉末混凝土为基底材料的断裂和疲劳试验研究[J].水力发电学报,2005,24(6):40-44. |
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| 作者姓名： | 周瑞忠 姚志雄 石成恩 |
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| 作者单位： | 福州大学土木建筑工程学院,福州,350002 |
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| 基金项目： | 高等学校博士学科点专项科研项目 |
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| 摘 要： | 采用虚拟裂缝模型结合线弹性断裂力学的方法,分析了RPC(活性粉末混凝土)及纤维增强RPC的断裂特性;结果显示,RPC中掺入钢纤维后,裂缝的扩展受到限制,材料的断裂韧度、裂缝亚临界扩展量大大提高,材料韧性显著得到改善.用Instron电液伺服式疲劳试验机对试件施加循环荷载测其疲劳寿命,分析知疲劳寿命满足威布尔概率分布.本文给出107个试件的各种断裂参数随纤维掺量的变化规律,分析其破坏的机理.
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| 关 键 词： | 水工材料 纤维增强 断裂韧度 虚拟裂缝模型 纤维掺量 疲劳寿命 循环荷载 活性粉末混凝土 |
| 收稿时间： | 2004-09-07 |
| 修稿时间： | 2004年9月7日 |
Experimental study on material fracture and fatigue properties based on reactive powder concrete |
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| ZHOU Ruizhong,YAO Zhixiong,SHI Cheng-en.Experimental study on material fracture and fatigue properties based on reactive powder concrete[J].Journal of Hydroelectric Engineering,2005,24(6):40-44. |
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| Authors: | ZHOU Ruizhong YAO Zhixiong SHI Cheng-en |
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| Affiliation: | College of Civil Engineering and Architecture, Fuzhou University, Fuzhou 350002 |
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| Abstract: | The fracture properties of RPC(Reactive Powder Concrete) and fibre RPC are analyzed by the Fictitious Crack Model(FCM) and the linear elastic fracture mechanics.The results show that the crack extension is controlled and the fracture indexes such as fracture toughness,pre-critical extension length are greatly influenced by fibre fraction. We impose cyclic loads on the specimens by the Instron testing machine to test its fatigue life,and then find out the results matching Weibull probability distribution.The relationship of fracture indexes of 107 specimens with fibre fraction to their failure mechanism is presented in this paper. |
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| Keywords: | hydranlic material fibre strengthen fracture toughness fictitious crack model fibre fraction fatigue life cyclic loads reactive powder concrete |
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