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September 26, 2023


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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 time-dependent 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)

Course Curriculum

  • Lecture 01 – Introduction Unlimited
    • Lecture 02 – Degrees of Freedom, SDOF System, Types of Vibrations Unlimited
    • Lecture 03 – SDOF System, Types of Vibrations, Free Vibration Unlimited
    • Lecture 04 – Problems on Torsional Motion Unlimited
    • Lecture 05 – Damped Free Vibrations Unlimited
    • Lecture 06 – Damped Free Vibrations, Definition of Critical Damping and Problems Unlimited
    • Lecture 07 – Decay of Motion Unlimited
    • Lecture 08 – Forced Vibrations, Dynamic Magnification Factor (DMF) Unlimited
    • Lecture 09 – Maxwell’s Diagram of DMF, Discussion on Phase Unlimited
    • Lecture 10 – Transmissibility Ratio, Response to Arbitrary, Step and Pulse Excitations Unlimited
    • Lecture 11 – Response to Arbitrary, Step and Pulse Excitations, Response to Impact Load Unlimited
    • Lecture 12 – Vibration Isolation, Vibrations Measuring Instruments Unlimited
    • Lecture 13 – Solutions of Quiz Questions, Multi-degree of Freedom Systems Unlimited
    • Lecture 14 – MDOF System: Equation of Motion, Longitudinal Waves in an Infinitely Long Rod Unlimited
    • Lecture 15 – Dimensional Wave Propagation, Waves in Semi-infinite Media, Rayleigh Wave Unlimited
    • Lecture 16 – Love Wave, Waves in Layered Medium, 3D Case-Inclined Wave, Earthquake Waves Unlimited
    • Lecture 17 – Earthquake Waves; P-Waves, S-Waves, 3 Circle Method, … Unlimited
    • Lecture 18 – Stresses in Soil Element, Field Tests, Seismic Reflection Test Unlimited
    • Lecture 19 – Seismic Reflection Test, SASW Test, Laboratory and Model Tests Unlimited
    • Lecture 20 – Centrifuge Tests Stress Strain Behaviour of Cyclically Loaded Soils Unlimited
    • Lecture 21 – Estimation of Gmax, Modulus Reduction Curves, Variation of Damping Ratio, … Unlimited
    • Lecture 22 – Liquefaction, Preliminary Screening, Simplified Procedure for Liquefaction Unlimited
    • Lecture 23 – Cyclic Stress Ratio, Evaluation of CRR, Correction Factors, Corrections for SPT Unlimited
    • Lecture 24 – Becker Penetrometer Test (BPT), Cone Penetrometer Test (CPT), SPT vs BPT Unlimited
    • Lecture 25 – Types of Machine Foundations, Methods of Analysis, Design of Machine Foundations Unlimited
    • Lecture 26 – Tschebotarioff’s Reduced Natural Frequency Method Unlimited
    • Lecture 27 – Problems on Tschebotarioff’s Method, Mass-Spring-Dashpot (MSD) Model Unlimited
    • Lecture 28 – MSD Model – Yawing Mode of Vibration, Use of MSD Model for Analysis Unlimited
    • Lecture 29 – Problems on Use of MSD Model for Analysis, Rocking Mode of Vibrations Unlimited
    • Lecture 30 – Torsional Mode/Yawing Mode, Constraint Force Type Excitation, EHS Theory Unlimited
    • Lecture 31 – EHS Theory, Vibrational Control Unlimited
    • Lecture 32 – Use of EHS Theory for Analysis Unlimited
    • Lecture 33 – Use of EHS Theory for Analysis (cont.) Unlimited
    • Lecture 34 – Liquefaction Mitigation Methods, Vibro Compaction, Densification Techniques Unlimited
    • Lecture 35 – Soil Improvement Methods, Dynamic Compaction, Reinforcement Techniques Unlimited
    • Lecture 36 – Force-based Analysis, Dynamic Analysis using MSD Model Unlimited
    • Lecture 37 – Behaviour of Subgrade Soil below Rail Track Unlimited
    • Lecture 38 – Quiz Unlimited

About the instructor

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