| 大型地下洞室地震灾变过程三维动力有限元模拟 |
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| 引用本文： | 张志国,肖明,陈俊涛.大型地下洞室地震灾变过程三维动力有限元模拟[J].岩石力学与工程学报,2011,30(3):509-523. |
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| 作者姓名： | 张志国 肖明 陈俊涛 |
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| 作者单位： | (1. 武汉大学 水资源与水电工程科学国家重点实验室，湖北 武汉 430072；;
2. 武汉大学 水工岩石力学教育部重点实验室，湖北 武汉 430072) |
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| 基金项目： | 国家自然科学基金重大项目(90715042); 国家杰出青年科学基金项目(50725931); 武汉大学博士研究生科研自主基金项目 |
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| 摘 要： | The earthquake impact is a major external factor influencing the long term stability of underground caverns. Time-history analysis method is able to simulate the earthquake response of surrounding rock in underground caverns during earthquake disaster process. It has been proved to be an effective method to analyze the aseismic issue of underground caverns. The numerical simulation system using three-dimensional dynamic finite element method is developed to study the earthquake disaster in underground caverns. Central difference method is employed in this system to solve the problem. To enhance the solving speed，parallel procedures and hybrid Gauss point integration method are proposed in programming. Strengthening features of materials under high strain rate and damage features of surrounding rock under cyclic loading are considered. The dynamic constitutive model for rock masses is presented. It is suitable for the aseismic analysis of underground caverns. Visco-elastic boundary is adopted in artificial boundary. The spatial oblique incident method which is suitable for the aseismic analysis of underground caverns is proposed. It is able to reflect the specific incident direction，the multi-incident surfaces and the inconsistency of seismic wave. An example is given to verify the correctness of the developed system by comparing its calculation results with common software?s calculation results. A case study is then conducted to simulate the earthquake disaster process of the cave-typed underground caverns at Lujichang hydropower plant. The results derived from time-history analysis indicate the reliability and practicability of the developed system.
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| 关 键 词： | numerical simulationunderground cavernsearthquake disasterthree-dimensional finite element methoddynamic constitutive modelseismic wave input |
SIMULATION OF EARTHQUAKE DISASTER PROCESS OF LARGE-SCALE UNDERGROUND CAVERNS USING THREE-DIMENSIONAL DYNAMIC FINITE ELEMENT METHOD |
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| ZHANG Zhiguo,XIAO Ming,CHEN Juntao.SIMULATION OF EARTHQUAKE DISASTER PROCESS OF LARGE-SCALE UNDERGROUND CAVERNS USING THREE-DIMENSIONAL DYNAMIC FINITE ELEMENT METHOD[J].Chinese Journal of Rock Mechanics and Engineering,2011,30(3):509-523. |
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| Authors: | ZHANG Zhiguo XIAO Ming CHEN Juntao |
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| Affiliation: | (1. State Key Laboratory of Water Resources and Hydropower Engineering Science，Wuhan University，Wuhan，Hubei 430072，China；2. Key Laboratory of Rock Mechanics in Hydraulic Structural Engineering of Ministry of Education，Wuhan University，;
Wuhan，Hubei 430072，China) |
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| Abstract: | The earthquake impact is a major external factor influencing the long term stability of underground caverns.Time-history analysis method is able to simulate the earthquake response of surrounding rock in underground caverns during earthquake disaster process.It has been proved to be an effective method to analyze the aseismic issue of underground caverns.The numerical simulation system using three-dimensional dynamic finite element method is developed to study the earthquake disaster in underground caverns.... |
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| Keywords: | numerical simulation underground caverns earthquake disaster three-dimensional finite element method dynamic constitutive model seismic wave input |
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