| 朱伯芳.关于混凝土坝的几个新理念[J].水利学报,2008,39(10): |
| 关于混凝土坝的几个新理念 |
| New ideas in construction and design of concrete dams |
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| DOI： |
| 中文关键词: 混凝土坝 数字监控 耐强烈地震机理 半熟龄期 |
| 英文关键词: concrete dam numerical monitoring mechanism high resistance to strong earthquake semi mature age |
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| 摘要点击次数: 3241 |
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| 中文摘要: |
| 提出了几个关于混凝土坝的新理念：（1）混凝土坝的数字监控，即除进行仪器观测之外，还应从施工期到运行期进行全坝全过程仿真分析，以便随时给出并预报大坝温度场、应力场和安全系数，从而提高大坝安全监控水平；（2）从理论上阐述了混凝土坝耐强烈地震而不垮的机理；（3）提出了混凝土半熟龄期的定义，通过调整半熟龄期，可大幅度降低温度应力，为改善混凝土抗裂能力找到了一条新途径。 |
| 英文摘要: |
| Three ideas in construction and design of concrete dams were suggested: (1) For promoting the safety monitoring technology of concrete dams, besides the observation by using instruments, numerical monitoring must be carried out in the whole process for the whole dam from the beginning of construction to put into operation, so that the temperature field, stress field and safety factors of dams can be forecasted at all times. (2)The concrete dam possesses high resistance to strong earthquake and its mechanism was theoretically demonstrated. (3)A new concept of semi mature age of the mechanical and thermal properties of concrete is proposed,which is defined as the age of concrete during the strength, modulus of elasticity or adiabatic temperature reaching the halves of their final value. By adjusting this semi mature age, the temperature stress can be greatly reduced. This property parameter provides a new way of promoting the crack resistance of concrete. |
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