| 重力坝上游坝面和坝踵水平裂缝的断裂力学分析 |
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| 引用本文： | 赵中极.重力坝上游坝面和坝踵水平裂缝的断裂力学分析[J].华北水利水电学院学报,1982(1). |
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| 作者姓名： | 赵中极 |
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| 作者单位： | 华北水利电学院水工系水工结构教研室 |
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| 摘 要： | 本文以线弹性断裂力学观点,对重力坝上游面和坝踵水平裂缝进行了分析,研究表明:在重力坝上游存在一个允许水平裂缝区。坝踵产生裂缝及其扩展是坝的初始破坏形式。当库水位上升时,裂缝向基岩内扩展,应该用断裂力学方法校核裂缝的稳定性,并以此作为重力坝稳定的补充条件。文中通过石膏实验,研究了脆性材料的复合判据。最后对应用断裂力学研究重力坝裂缝问题提出几点意见。
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An Analysis of Horizontal Cracks on the Upstream Slope and the Heel of the Gravity Dams in Terms of Fracture Mechanics |
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| Abstract: | An analysis of horizontal eracks on the upstream slope and the heel of the gravity dam shows that an allowed region of horizontal cracks evi- denlly exists,the cracks occurring about the beolmaybe a prediction of initial failure of the dams,the cracks develop and progagate into the rock foundations as the water level rises.Hence,it is necessary to chock the sta- bility of cracks with the help of fracture mechanics,which is retarded as an important supplementary condition for the stability of agravity dams. By the plaster experiments the composite failure criterion of brittle materials has been studied in this article. Finlly,some suggestions were given about the theory of fracture me- chanics applied to the cracking of the gravity dams. |
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