Soil Dynamics
Soil Dynamics. Instructor: Prof. Deepankar Choudhury, Department of Civil Engineering, IIT Bombay. This course discusses the behaviour and properties/response of soil as a material subjected to the dynamic or cyclic timedependent loading. Also the design and principle for machine foundations comes along with this course to consider the dynamic properties of both soil and foundation as combined mass. Behaviour of various geotechnical structures such as shallow and deep foundations, retaining structures, slopes, subgrade soil below railway, pavement, runway due to various types of time?dependent dynamic loading are discussed here with reference to codal provisions. The advanced course material on soil dynamics will be very useful to undergraduate students, post?graduate students, researchers, teachers and practitioners. A number of selected problems will be solved to illustrate the concepts clearly.
(from nptel.ac.in)
Lecture 01  Introduction 
Vibration Theory 
Lecture 02  Degrees of Freedom, SDOF System, Types of Vibrations 
Lecture 03  SDOF System, Types of Vibrations, Free Vibration 
Lecture 04  Problems on Torsional Motion 
Lecture 05  Damped Free Vibrations 
Lecture 06  Damped Free Vibrations, Definition of Critical Damping and Problems 
Lecture 07  Decay of Motion 
Lecture 08  Forced Vibrations, Dynamic Magnification Factor (DMF) 
Lecture 09  Maxwell's Diagram of DMF, Discussion on Phase 
Lecture 10  Transmissibility Ratio, Response to Arbitrary, Step and Pulse Excitations 
Lecture 11  Response to Arbitrary, Step and Pulse Excitations, Response to Impact Load 
Lecture 12  Vibration Isolation, Vibrations Measuring Instruments 
Lecture 13  Solutions of Quiz Questions, Multidegree of Freedom Systems 
Lecture 14  MDOF System: Equation of Motion, Longitudinal Waves in an Infinitely Long Rod 
Wave Propagation 
Lecture 15  Dimensional Wave Propagation, Waves in Semiinfinite Media, Rayleigh Wave 
Lecture 16  Love Wave, Waves in Layered Medium, 3D CaseInclined Wave, Earthquake Waves 
Lecture 17  Earthquake Waves; PWaves, SWaves, 3 Circle Method, Estimation of Earthquake Epicentre 
Dynamic Soil Properties 
Lecture 18  Stresses in Soil Element, Field Tests, Seismic Reflection Test 
Lecture 19  Seismic Reflection Test, SASW Test, Laboratory and Model Tests 
Lecture 20  Centrifuge Tests Stress Strain Behaviour of Cyclically Loaded Soils 
Lecture 21  Estimation of Gmax, Modulus Reduction Curves, Variation of Damping Ratio, Cyclic Plate Load Test 
Lecture 22  Liquefaction, Preliminary Screening, Simplified Procedure for Liquefaction 
Lecture 23  Cyclic Stress Ratio, Evaluation of CRR, Correction Factors, Corrections for SPT 
Lecture 24  Becker Penetrometer Test (BPT), Cone Penetrometer Test (CPT), SPT vs BPT 
Machine Foundations 
Lecture 25  Types of Machine Foundations, Methods of Analysis, Design of Machine Foundations 
Lecture 26  Tschebotarioff's Reduced Natural Frequency Method 
Lecture 27  Problems on Tschebotarioff's Method, MassSpringDashpot (MSD) Model 
Lecture 28  MSD Model  Yawing Mode of Vibration, Use of MSD Model for Analysis 
Lecture 29  Problems on Use of MSD Model for Analysis, Rocking Mode of Vibrations 
Lecture 30  Torsional Mode/Yawing Mode, Constraint Force Type Excitation, EHS Theory 
Lecture 31  EHS Theory, Vibrational Control 
Lecture 32  Use of EHS Theory for Analysis 
Lecture 33  Use of EHS Theory for Analysis (cont.) 
Soil Improvement Techniques 
Lecture 34  Liquefaction Mitigation Methods, Vibro Compaction, Densification Techniques 
Lecture 35  Soil Improvement Methods, Dynamic Compaction, Reinforcement Techniques 
Dynamic SoilStructure Interaction 
Lecture 36  Forcebased Analysis, Dynamic Analysis using MSD Model 
Lecture 37  Behaviour of Subgrade Soil below Rail Track 
Lecture 38  Quiz 
References 
Soil Dynamics
Instructor: Prof. Deepankar Choudhury, Department of Civil Engineering, IIT Bombay. This course discusses the behaviour and properties/response of soil as a material subjected to the dynamic or cyclic timedependent loading.
