| 某混凝土坝的粘弹性断裂力学分析 |
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| 引用本文： | 张淳源.某混凝土坝的粘弹性断裂力学分析[J].湘潭大学自然科学学报,1989,11(2):122-130. |
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| 作者姓名： | 张淳源 |
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| 作者单位： | 湘潭大学机械工程系 |
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| 摘 要： | 应用粘弹性断裂力学理论本文分析了某水电站混凝土大头坝坝墩上游面中心垂直裂纹的延迟失稳问题。采用Rabotnov体作为流变模型计算了裂纹延迟失稳扩展深度。采用裂纹-切口模型及COD判据计算了裂纹扩展速度及寿命与初始裂纹深度之间的关系。文中还分析了该坝墩裂纹自动止裂的原因。
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| 关 键 词： | 粘弹性断裂力学 混凝土坝 |
VISCOELASTIC FRACTURE MECHANICS ANALYSIS OF A CONCRETE DAM |
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| Zhang Chunyuan.VISCOELASTIC FRACTURE MECHANICS ANALYSIS OF A CONCRETE DAM[J].Natural Science Journal of Xiangtan University,1989,11(2):122-130. |
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| Authors: | Zhang Chunyuan |
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| Institution: | Department of Mechanical Engineering |
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| Abstract: | By using the theory of viscoelastic fracture mechanics the problem of delayed crackinstability of the vertical mid crack on the upstream face of a diamond head buttressedconcrete dam at Zhexi Hydropower Station is analyzed, Critical values for delayed crackinstability, the stable crack growth velocity and the time-to-dynamic-growth are calcu-lated.An analysis of why the crack propagation in the buttress of Zhexi dam could stopautomatically is also given. |
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| Keywords: | Viscoelastic Fracture Mechanics Concrete Dam |
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