| 碾压混凝土重力坝诱导缝施工期三维非线性开裂分析 |
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| 引用本文： | 刘杏红,常晓林,周伟. 碾压混凝土重力坝诱导缝施工期三维非线性开裂分析[J]. 武汉大学学报(工学版), 2005, 38(3): 41-44 |
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| 作者姓名： | 刘杏红 常晓林 周伟 |
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| 作者单位： | 武汉大学水资源与水电工程科学国家重点实验室,湖北,武汉,430072 |
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| 摘 要： | 基于三维瞬态有限元温度应力仿真分析的结果,采用混凝土分布裂缝模型,对大坝诱导缝的开裂及裂缝扩展进行了跟踪计算.计算结果表明,坝体的上游面诱导缝缝端应力强度因子局部超过混凝土的断裂韧度,诱导缝开裂发生,诱导缝的开裂明显地减小了坝段中部区域的拉应力,根据开裂分析结果,建议诱导缝的设置长度为4.5m.
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| 关 键 词： | 碾压混凝土重力坝 诱导缝 有限元 温度仿真 分布裂缝模型 |
| 文章编号： | 1671-8844(2005)03-041-04 |
| 修稿时间： | 2004-10-14 |
Three-dimension nonlinear cracking study of inducing slit of RCC gravity dam during construction period |
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| LIU Xin-hong,CHANG Xiao-lin,ZHOU Wei. Three-dimension nonlinear cracking study of inducing slit of RCC gravity dam during construction period[J]. Engineering Journal of Wuhan University, 2005, 38(3): 41-44 |
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| Authors: | LIU Xin-hong CHANG Xiao-lin ZHOU Wei |
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| Abstract: | Based on the result of transient temperature stress calculation, the distributing crack model of concrete is applied to simulate cracking and crack propagating of the dam inducing slit by dynamic tracking method. The simulation analytical results of the whole dam show that inducing slit tip stress intensity factors exceed rupture tenacity of concrete on upstream dam face; and inducing slit cracking occurs. The crack of inducing slit leads tensile stress release near slit. The length of the inducing slit is suggested to 4.5 m on basis of the cracking analysis result. |
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| Keywords: | RCC gravity dam inducing slit FEM temperature simulation distributing crack model |
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