| 砼四点剪切(Ⅱ型)断裂的数值研究 |
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| 引用本文： | 郝圣旺,李慧剑,黎振兹,周洪彬.砼四点剪切(Ⅱ型)断裂的数值研究[J].燕山大学学报,2002,26(1):67-70. |
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| 作者姓名： | 郝圣旺 李慧剑 黎振兹 周洪彬 |
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| 作者单位： | 燕山大学建筑工程与力学学院,秦皇岛,066004 |
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| 摘 要： | 有关Iosipescu四点剪切实验的争论很多，国内外的研究者提出了各种各样的结果。本文用有限元的方法对大量的各种尺寸和国载方式的砼四点剪切试件进行了详细的分析。通过对裂尖两尖之间韧带区域的应力场物分析，发现增加试件高度或缩短加载点与裂纹面的距离将更有利于四点剪切加载下砼的Ⅱ型破坏。但裂纹长度的增加的影响并不一定有益于砼试件的Ⅱ型破坏。
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| 关 键 词： | 紧凑四点剪切 裂尖 韧带 剪切断裂 混凝土 数值研究 |
| 修稿时间： | 2001年10月15 |
Numerical Study of Concrete Four-Point Shear (ModeⅡ) Fracture |
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| Hao Shengwang,Li Huijian,Li Zhenzi,Zhou Hongbin,.Numerical Study of Concrete Four-Point Shear (ModeⅡ) Fracture[J].Journal of Yanshan University,2002,26(1):67-70. |
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| Authors: | Hao Shengwang Li Huijian Li Zhenzi Zhou Hongbin |
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| Abstract: | The Iosipescu shear test specimen geometry has been invest igated by a number of research workers with conflicting results. In th is paper, the Finite Element Method has been used to investigate a ran ge of geometries. Stress distribution around the crack tip and the lig ament between the two crack tips has been studied. The results are pre sented that whether increasing the width of the specimens or decreasin g the distance from the loading location to the crack surface will inc rease the likelihood of shear fracture prior to tensile failure. But t he variety of the crack length has no influence on it. |
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| Keywords: | compact four-point shear crack tip ligament shear fract ure |
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