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| 长江三峡大坝混凝土双K断裂参数试验研究 | |
| 引用本文： | 赵志方,张小刚,周厚贵,马金刚.长江三峡大坝混凝土双K断裂参数试验研究[J].深圳大学学报(理工版),2007,24(4):363-367. |
| 作者姓名： | 赵志方 张小刚 周厚贵 马金刚 |
| 作者单位： | 1. 浙江工业大学建筑工程学院,杭州,310014 2. 深圳大学土木工程学院,深圳市土木工程耐久性重点实验室,深圳,518060 3. 中国葛洲坝集团公司,宜昌,443002 |
| 基金项目： | 国家自然科学基金;浙江省自然科学基金 |
| 摘 要： | 对长江三峡工程泄洪坝段原材料制成的大坝混凝土及其湿筛混凝土试件做直接拉伸试验,得到大坝混凝土及其湿筛混凝土断裂过程区的本构关系.结合标准三点弯曲切口梁试验,运用双K断裂模型,得到大坝混凝土和湿筛混凝土的双K断裂参数.试验结果表明,三峡大坝混凝土的起裂和失稳韧度均大于其湿筛混凝土,前者分别为后者的1.14和1.19倍. |
| 关 键 词： | 大坝混凝土 湿筛混凝土 软化本构关系 双K断裂参数 直接拉伸试验 三点弯曲试验 长江三峡水利枢纽 |
| 文章编号： | 1000-2618（2007）04-0363-05 |
| 修稿时间： | 2007-03-22 |
Experimental study for determining double-K fracture parameters of the Three Gorges Dam concrete |
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| ZHAO Zhi-fang,ZHANG Xiao-gang,ZHOU Hou-gui,MA Jin-gang.Experimental study for determining double-K fracture parameters of the Three Gorges Dam concrete[J].Journal of Shenzhen University(Science &engineering),2007,24(4):363-367. | |
| Authors: | ZHAO Zhi-fang ZHANG Xiao-gang ZHOU Hou-gui MA Jin-gang |
| Affiliation: | 1 School of Civil Engineering and Architecture, Zhejiang University of Technology, Hangzhou 310014 P. R. China;2 College of Civil Engineering Shenzhen Municipal Key Laboratory on Durability of Civil Engineering, Shenzhen University Shenzhen 518060 P. R. China;3 China Gezhouba Group Co Ltd, Yichang 443002 P. R. China |
| Abstract: | Using dam and wet-screening concrete specimens made of raw componential materials,as used in the discharge segment of the Three Gorges Dam,uniaxial tension tests were conducted to achieve the softening constitutive relations of fracture process zone of the dam and wet-screening concrete.Combining with three-point bending notched beam tests,adopting double-K fracture model,the double-K fracture parameters of the dam and wet-screening concrete were obtained.The results show that initial fracture toughness and unstable fracture toughness of the dam concrete are 1.14 times and 1.19 times those of the wet-screening concrete respectively. |
| Keywords: | dam concrete wet-screening concrete softening constitutive relation double-K fracture parameters uniaxial tension test three-point bending notched beam test the Three Gorges Dam |
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