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Mechanism and bounding of earthquake energy input to building structure on surface ground subjected to engineering bedrock motion |
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| Institution: | 1. Research Laboratory for Nuclear Reactors, Tokyo Institute of Technology, 2-12-1, Ookayama, Meguro-ku, Tokyo 152-8550, Japan;2. Department of Nuclear Engineering, Graduate School of Science and Engineering, Tokyo Institute of Technology, 2-12-1, Ookayama, Meguro-ku, Tokyo 152-8550, Japan;3. Advanced Composite Research Center, Aerospace Research and Development Directorate, Japan Aerospace Exploration Agency (JAXA), 6-13-1, Osawa, Mitaka, Tokyo 181-0015, Japan;1. Technische Universität Darmstadt, Fachbereich Biologie, Fachgebiet Zoologie, Ökologische Netzwerke, Schnittspahnstr. 3, 64287 Darmstadt, Germany;2. State University of New York, College of Environmental Science and Forestry, 1 Forestry Drive, Syracuse, NY 13210, USA;1. University of Florida, PO Box 116585, Gainesville, FL 32611-6585, United States;2. University of Virginia, 351 McCormick Road, Charlottesville, VA 22904, United States;3. Florida Atlantic University, 777 Glades Road, Building 36, Room 225, Boca Raton, FL 33431, United States;4. Leidos, Inc., 11251 Roger Bacon Drive, Reston, VA 20190, United States;1. School of Civil and Mechanical Engineering, Curtin University, Perth, Australia;2. Institute of Applied Mechanics, National Taiwan University, Taiwan, ROC |
| Abstract: | The mechanism of earthquake energy input to building structures is clarified by considering the surface ground amplification and soil–structure interaction. The earthquake input energies to superstructures, soil–foundation systems and total swaying–rocking system are obtained by taking the corresponding appropriate free bodies into account and defining the energy transfer functions. It has been made clear that, when the ground surface motion is white, the input energy to the swaying–rocking model is constant regardless of the soil property (input energy constant property). The upper bound of earthquake input energy to the swaying–rocking model is derived for the model including the surface ground amplification by taking full advantage of the above-mentioned input energy constant property and introducing the envelope function for the transfer function of the surface ground amplification. Extension of the theory to a general earthquake ground motion model at the engineering bedrock is also made by taking full advantage of the above-mentioned input energy constant property. |
| Keywords: | Earthquake input energy Energy transfer function Swaying–rocking model Soil–structure interaction Surface ground amplification Upper bound of input energy |
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