| 杨令强,练继建,张社荣,陈祖坪.拱坝的破坏分析及超载问题探讨[J].水利学报,2003,34(3):0055-0062 |
| 拱坝的破坏分析及超载问题探讨 |
| Analysis of breaking and overloading of arch dams |
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| DOI： |
| 中文关键词: 破坏分析 超载 可靠度 拱坝 |
| 英文关键词: breaking analysis overloading relability arch dam |
| 基金项目: |
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| 摘要点击次数: 1525 |
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| 中文摘要: |
| 以拱坝和周围的岩体为研究对象，采用线弹性 本构模型和不同的破坏追踪方式，对破坏过程中的不同的应力状态应用不同的强度准则和功 能函数，破坏过程的分析按三维随机有限元法分析可靠度指标场，从可靠度指示场中寻找并 联系统中最易出现的破坏轨迹，给出其破坏形式和安全度。同时按逐步增加水的比重和提高 水位两种方法给出拱坝的超载破坏过程，最后指出拱坝的超载是不现实的，也不能给出切合 实际的拱坝安全性。 |
| 英文摘要: |
| The authors studied the breaking process of arch dam collapse, the probability of collapse and corresponding reliability index, taking the arch dam and its foundation as an interactive system. The linear elasticity constitutive and various breaking modes were adopted. Several failure criterions and different performance functions of concrete and rock were used according to corresponding stress state. The analysis of breaking process was based on the analysis of th reliability index field according to 3 D stochastic FEM. By increasing either the water density or the water level step by step, the process dam collapse was simulated. The responding fields were analyzed to point out overloading was unrealistic. |
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