Dynamic analysis of earth dam damaged by the 2011 Off the Pacific Coast of Tohoku Earthquake |
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| Institution: | 1. State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, Shanghai 200240, PR China;2. Research Center on Landslides, Disaster Prevention Research Institute, Kyoto University, Uji 611-0011, Japan;3. China Institute of Geo-Environment Monitoring, Beijing 100081, PR China;4. Guizhou Institute of Geo-Environment Monitoring, Guiyang, Guizhou 550004, PR China;5. Guizhou Institute of Geophysical and Geochemical Prospecting, Guiyang, Guizhou 550005, PR China;1. Núcleo Professor Rogerio Valle de Produção Sustentável-SAGE/COPPE, Centro de Gestão Tecnológica-CT2, Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, RJ, Brazil;2. Instituto de Biologia, CCS, Laboratório de Microbiologia, Anexo ao Bloco A, Universidade Federal do Rio de Janeiro, Ilha do Fundão, Rio de Janeiro 21941-902, Brazil;3. Departamento de Ensino de Graduação - Universidade Federal do Rio de Janeiro - Campus UFRJ - Macaé Professor Aloisio Teixeira, Macaé, Rio de Janeiro, 27930-480, Brazil;4. Systems Engineering and Computer Science Program at COPPE/UFRJ, Avenida Horácio Macedo 2030, Brazil;5. Laboratório de Ciências Ambientais, Centro de Biociências e Biotecnologia, Universidade Estadual do Norte Fluminense, Av. Alberto Lamego 2000, 28015-620 Campos dos Goytacazes, RJ, Brazil;6. Universidade Federal do Rio de Janeiro, UFRJ, Brasil;1. Dept. of Civil and Building Engineering and Architecture, Università Politecnica delle Marche, Ancona, Italy;2. Seitec, Seismotechnologies Srl, Ancona, Italy |
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| Abstract: | This study examines possible failure mechanisms and dynamic behavior of the Fujinuma dam, which failed following the 2011 Off the Pacific Coast of Tohoku Earthquake. The study comprises two parts: an investigation through field and laboratory experiments, and a numerical simulation of the dam. Field measurements and laboratory experiments were conducted to acquire necessary information. Microtremor observations of the surviving portion of the failed dam were performed to extract data from its dynamic characteristics. Triaxial and other laboratory tests provided information required for the analysis. For the seismic analysis, a coupled solid–fluid finite element method was applied and observed and simulated motions of the 2011 Tohoku Earthquake used as input. Mechanical behavior of the dam material was described using the Mohr–Coulomb failure criterion. Frequency and dynamic analyses were performed and dam behavior and possible failure phenomena presented. Furthermore, a comparison between the simulation results and existing facts is discussed. |
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| Keywords: | Earth dam Earthquake Finite element Dynamic Fujinuma dam |
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