| 核电厂沉积岩岩基激振试验研究 |
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| 引用本文： | 李勇,郑文棠.核电厂沉积岩岩基激振试验研究[J].震灾防御技术,2011,6(1):69-76. |
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| 作者姓名： | 李勇 郑文棠 |
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| 作者单位： | 广东省电力设计研究院,广州,510663 |
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| 基金项目： | 广东省电力设计研究院院级科标经费资助 |
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| 摘 要： | 岩基是核电厂Ⅰ、Ⅱ类物项的承载基础,其动力参数取值对核电厂抗震设计意义重大.目前,我国核电站岩基以块状火成岩为主,其动力参数取值和试验成果较少,而有关层状岩体结构的核电站沉积岩岩基动力参数取值和试验研究则未见报道.本文以我国首个以沉积岩为岩基的核电厂为例,基于振动基本理论,设计了自由振动和强迫振动激振实验,并对比了垂直层理水平方向和沿层理水平方向的激振试验结果,旨在获得首个沉积岩核岛岩基的岩基阻尼比、抗剪刚度和抗弯刚度等动力参数,以期为类似工程提供设计依据.试验表明:由自由振动和强迫振动获得的某核电站呈层状岩体结构的沉积岩核岛岩基动力参数相近,岩基抗压刚度系数为21.4-28.83MN/m3;岩基抗剪刚度系数为15.44-22.68MN/m3;岩基抗弯刚度系数为44.24-60.72MN/m3;岩基竖直向阻尼比为7.34%-7.68%;岩基水平回转向第一振型阻尼比为7.43%-7.44%;垂直层理水平方向和沿层理水平方向试验成果的各向异性指数为0.9%-7.5%;动力参数呈弱各向异性.试验结果首次给出了该核电站沉积岩岩基的动力参数取值范围,对具有相似岩基的核电厂抗震设计有较好的工程参考价值.
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| 关 键 词： | 核电厂 沉积岩 核岛岩基 激振试验 阻尼比 |
| 收稿时间： | 7/1/2010 12:00:00 AM |
Exciter Test on Sedimentary Rock Base for theNuclear Power Plant |
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| Li Yong and Zheng Wentang.Exciter Test on Sedimentary Rock Base for theNuclear Power Plant[J].Technology for Earthquake Disaster Prevention,2011,6(1):69-76. |
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| Authors: | Li Yong and Zheng Wentang |
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| Institution: | Li Yong and Zheng Wentang (Guangdong Electric Power Design Institute, Guangzhou 510663, China) |
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| Abstract: | As the foundation of the nuclear power plant, batholith and its dynamic parameters are of great significance for the seismic safety design. Nowadays, batholith in China nuclear power plants is mainly comprised of intact igneous rock mass and its dynamic parameters are less studied. Taking the first sedimentary batholith of China nuclear power plant for an example, we designed exciter tests of free vibration and forced vibration on parallel bedding and vertical bedding, based on the fundamental methods of vibration theory. The damping ratio, shearing rigidity and flexural rigidity of sedimentary batholith of certain nuclear island batholith of certain nuclear power plant in first state were achieved. Our results indicate that the dynamic parameters of the sedimentary nuclear island batholith of a certain nuclear power plant in first state are similar. The compressional stiffness is in 21.40—28.83MN/m3, the shear stiffness is in 15.44—22.68MN/m3, the bending rigidity is in 44.24—60.72MN/m3, the vertical damping ratio is in 7.34—7.68%, and the horizontal rotary damping ratio is in 7.43—7.44%. The dynamic parameters shows weak anisotropic indexes which are in 0.9%—7.5%. The exciter tests give the first value range of dynamic parameters of the sedimentary nuclear island batholith and they have important significance to the seismic design of other nuclear power plants with sedimentary rock base in China. |
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| Keywords: | Nuclear Power Plant Sedimentary Rock Nuclear island rock base Exciter test Damping ratio |
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