| 关于加气混凝土断裂行为的研究 |
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| 引用本文： | 马锠臣 冯乃谦. 关于加气混凝土断裂行为的研究[J]. 混凝土, 2005, 0(10): 3-6,15 |
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| 作者姓名： | 马锠臣 冯乃谦 |
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| 作者单位： | 清华大学土木工程系,北京100084 |
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| 摘 要： | 在本研究中对加气混凝土梁在不同初始裂纹相对长度、不同高度以及不同体积比例等情况下的断裂韧性、断裂能以及载荷-裂纹口张开位移-裂纹尖端张开位移-裂纹尖端前沿区若干测点张开位移全曲线进行了系统研究。结果表明，加气混凝土是断裂敏感的，断裂韧性值不决定干初始裂纹长度，对于大尺寸试件，所测断裂能和断裂韧性值符合方程KIC^2=EGF，已成为有效值。
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| 关 键 词： | 加气混凝土 线弹性断裂力学 张开位移 缺口敏感性 |
| 文章编号： | 1002-3550（2005）10-0003-04 |
| 收稿时间： | 2005-06-28 |
| 修稿时间： | 2005-06-28 |
Researching on the fracture behavior of gas concrete |
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| MA Chang-chen, FENG Nai-qian. Researching on the fracture behavior of gas concrete[J]. Concrete, 2005, 0(10): 3-6,15 |
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| Authors: | MA Chang-chen FENG Nai-qian |
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| Affiliation: | Civil Engineering Department, Tsinghua University, Beijing 100084, China |
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| Abstract: | Under the ratios of various initial cracking relative length,height and volume of gas concrete beam,the whole curve of opening displacements at several testing points about fracture toughness,fracture energy,and in the area of load,cracking-tip-opening-displacement,cracking tip opening displacement cracking-tip-area are researched systematically.The result shows that the gas concrete is sensible in crackle,the value of fracture toughness doesn't depend on initial crackle length,and for the large samples,the values of fracture energy and fracture toughness fits the equation K~2_(IC)=EG_F. |
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| Keywords: | gas concrete linear plastic fracture mechanics opening displacement gap sensitivity |
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