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 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)
Go to the Course Home or watch other lectures:
| 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, Multi-degree 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 Semi-infinite Media, Rayleigh Wave |
| Lecture 16 - Love Wave, Waves in Layered Medium, 3D Case-Inclined Wave, Earthquake Waves |
| Lecture 17 - Earthquake Waves; P-Waves, S-Waves, 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, Mass-Spring-Dashpot (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 Soil-Structure Interaction |
| Lecture 36 - Force-based Analysis, Dynamic Analysis using MSD Model |
| Lecture 37 - Behaviour of Subgrade Soil below Rail Track |
| Lecture 38 - Quiz |