| 王进廷,杨剑,王吉焕,王仁坤.二滩拱坝应力仿真及参数敏感性分析[J].水利学报,2007,38(7):832-837 |
| 二滩拱坝应力仿真及参数敏感性分析 |
| Simulation of stress distribution and sensitivity analysis on material parameters for high arch dam |
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| DOI： |
| 中文关键词: 二滩拱坝 应力仿真 材料参数 敏感性分析 蚀变带 |
| 英文关键词: arch dam Ertan Project simulation of stress status thermal stress sensitivity analysis of material parameter alteration |
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| 中文摘要: |
| 本文基于已有的二滩拱坝温度荷载和材料参数反馈分析结果，对该坝运行期的应力状态进行了仿真分析。研究发现，坝面最大拉应力与气温密切相关并随季节周期性变化，冬季时下游面左右岸最大主应力分布明显呈不对称分布，左岸基本上以压应力为主，而右岸则出现较大拉应力区，最大值可达到2MPa以上。材料参数和温度荷载敏感性分析表明，冬季时下游坝面右岸出现的较大拉应力是由于大坝右岸基岩蚀变带和右
岸下游坝面温度偏低所共同造成的，但蚀变带弹模的变化对坝体应力的影响是局部的，不致于对大坝的安全运行产生不利影响。 |
| 英文摘要: |
| The stress distribution of the high arch dam in Ertan Project in operating period is analyzed by means of FEM based on observation data of temperature and back analysis on material parameters. The result shows that the maximum principle tensile is closely related to the atmospheric temperature and varies cyclically with the seasons in a year. The stress on downstream face of the dam is uns
ymmetrical to the crown cantilever in winter. A high tensile stress zone exists on the right side of the bank. The sensitivity analysis on material parameters shows that the high tensile stress is caused both by the alteration zone within the foundation rock and the existence of low temperature area on down stream face of the dam, but the effect of the alteration zone is limited in a small reg
ion. It is concluded that this problem will not affect the safety of this high arch dam. |
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