Assessment of damping models in FLAC |
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| Affiliation: | 1. Department of Civil Engineering, National Chung Hsing University, Taiwan;2. Department of Civil and Environmental Engineering, Hanyang University, 17 Haengdangdong, Sungdong-gu, Seoul, South Korea;1. School of Civil Engineering/State Key Laboratory of Hydroscience and Engineering, Department of Hydraulic Engineering, Tsinghua University, Beijing 100084, China;2. Atmospheric, Earth, and Energy Division, Lawrence Livermore National Laboratory, Livermore, CA 94550, USA;1. CIMNE, International Centre for Numerical Methods in Engineering, Spain;2. Universitat Politècnica de Catalunya (UPC) – CIMNE, Spain;3. Universidad Nacional Autónoma de México, Mexico;4. Universitat de Vic-Universitat Central de Catalunya (UVic-UCC) – CIMNE, Spain;1. Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Geotechnical Research Institute, Hohai University, 1 Xikang Road, Nanjing 210098, China;2. Geotechnical Research Institute, College of Civil and Transportation Engineering, Hohai University, 1 Xikang Road, Nanjing 210098, China |
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| Abstract: | Geotechnical materials dissipate energy as mechanical waves propagate through them. This form of energy dissipation is known as material damping and can be introduced into formulations for dynamic analyses in different ways. Particularly, the finite difference code FLAC contains some alternatives to represent material damping in seismic analyses. In the present review paper these damping models were assessed simulating the free field response of a particular site in Mexico City, induced by the 1985 Michoacán Earthquake. It is concluded that, for the conditions studied here, Rayleigh damping turned out to be the most suitable alternative to represent energy dissipation of soil elements. |
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| Keywords: | Damping model Material damping Dynamic numerical analysis FLAC |
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