| 混凝土断裂过程区长度计算方法研究 |
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| 引用本文： | 卿龙邦,李庆斌,管俊峰.混凝土断裂过程区长度计算方法研究[J].工程力学,2012,29(4):197-201. |
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| 作者姓名： | 卿龙邦 李庆斌 管俊峰 |
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| 作者单位： | 清华大学水沙科学与水利水电工程国家重点实验室,北京 100084;2. 华北水利水电学院土木与交通学院,河南,郑州 450011 |
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| 基金项目： | 国家自然科学基金项目(90715041);十一五支撑计划项目(2008BAB29B05) |
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| 摘 要： | 该文基于粘聚裂缝概念,以起裂韧度作为裂缝起裂和扩展的准则,提出了混凝土断裂过程区长度的计算方法。以Ⅰ型裂缝为例,计算了不同初始缝长和起裂韧度情况下的断裂过程区长度值,结合以往大体积混凝土的试验数据对其进行了验证。进而分析了断裂过程区长度的影响因素,结果表明:断裂过程区长度随初始缝长的增大而逐渐增大,随起裂韧度的增大而逐渐减小。
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| 关 键 词： | 混凝土 断裂过程区长度 拉伸软化曲线 粘聚裂缝 起裂韧度 |
| 收稿时间： | 2010-07-16 |
CALCULATATION METHOD OF THE LENGTH OF FRACTURE PROCESS ZONE OF CONCRETE |
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| QING Long-bang,LI Qing-bin,GUAN Jun-feng.CALCULATATION METHOD OF THE LENGTH OF FRACTURE PROCESS ZONE OF CONCRETE[J].Engineering Mechanics,2012,29(4):197-201. |
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| Authors: | QING Long-bang LI Qing-bin GUAN Jun-feng |
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| Affiliation: | State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084, China;2. School of Civil Engineering and Communication, North China Institute of Water Conservancy and Hydroelectric Power, Zhengzhou, Henan 450011, China |
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| Abstract: | Based on the concept of cohesive crack and taking initial fracture toughness as a fracture initiation and propagation criteria,the calculation method of a concrete fracture process zone length is developed.The fracture process zone length in the Mode Ⅰ Crack with different initial crack lengths and fracture toughness are calculated and the results are verified by previous experiment data of mass concrete.Furthermore,the affecting factors of fracture process zone lengths are analyzed and the results show that the fracture process zone length gradually increases with initial crack length and decreases with initial fracture toughness. |
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| Keywords: | concrete length of fracture process zone tension softening curve cohesive crack initial fracture toughness |
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