E0-190-2008_(2)Chapter_1 - Dynamic Soil Structure...

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Kenji MIURA, Dr. Eng. Professor Graduate School of Engineering Hiroshima University Dynamic Soil Structure Interaction
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Dynamic Soil Structure Interaction Chapter 1 : Introduction Kenji MIURA, Dr. Eng. Professor Graduate School of Engineering Hiroshima University
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Preface Years over a half-century have passed since an investigation of Dynamic Soil-Structure Interaction (SSI) was started, and the SSI has been attracting the researcher's interest up to the present. Today, many researchers around the world are making their efforts on research and development concerning the SSI, and the efforts will be continued in the future. This lecture starts from the basic outline of the SSI and comes into phenomena caused by the SSI, and then numerical procedures are explained. Finally, a practical seismic design analysis of structure is presented.
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Contents of Lecture Note 1. Introduction 2. Observation of SSI effect 3. Effect of SSI on Dynamic Behavior of Structure 4. Dynamic Impedance Function & Foundation Input Motion 5. SII for Surface Foundation 6. SSI for Pile Foundation 7. SSI for Buried Structure 8. Nonlinear Effect of Soil 9. Practical Seismic Design Analysis 10. Verification Study 11. References
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Publications for SSI (1) Richard F.E., J.R. Hall and R.D. Woods: “ Vibrations of Soils and Foundations ”, Englewood Cliffs, NJ, Prentice-Hall, 1970 (2) Wolf J.P.:“ Dynamic Soil Structure Interaction ”, Englewood Cliffs, NJ, Prentice-Hall, 1985 (3) Wolf J.P.: “ Soil Structure Interaction Analysis in Time Domain ”, Englewood Cliffs, NJ, Prentice-Hall, 1988 (4) Wolf J.P.: “ Foundation Vibration Analysis using Simple Physical Model”, Englewood Cliffs, NJ, Prentice-Hall, 1994 Reference for Vibration of Soil Strata Schnabel P.B., Lysmer J. and Seed H.B.: SHAKE A COMPUTER PROGRAM FOR EARTHQUAKE RESPONSE ANALYSIS OF HORIZONTALLY LAYERED SITE , Earthquake Engineering Research Center, No. EERC 72-12, Dec. 1972, College of Engineering, University of California, Berkeley, California
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When an earthquake occurs, the building and the ground vibrate with influencing each other. Earthquake Wave Soil Footing or Basement Building Ground Surface Pile This phenomenon is called “ Dynamic Soil Structure Interaction ”, and is recognized as being very important for seismic design of structure. 1. Introduction
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1.1 Basic Outline of Soil Structure Interaction 1) Role of Foundation (1) Under normal condition Supporting the dead weight and the live load of the building (2) During an earthquake Transmitting the ground motion to the building The ground and the building influence each other through the foundation, and this is called the Dynamic Soil-Structure Interaction (hereafter abbreviated to SSI) Transmitting these loads to the ground. Bearing the building vibrations and transmitting them to the ground.
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2) Degree of Influence of SSI on Response of Building depends on: (a) Stiffness of Ground (b) Dynamic Characteristics of Building itself, that is, Natural Period, Damping Factor (c) Foundation Types
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3) Foundation Type (a) Spread Foundation (b) Pile Foundation without Basement (c) Basement without pile (d) Basement with piles
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