Soil Dynamics


Lecture 1 - Introduction


Lecture 2 - Degrees of Freedom, SDOF System, Types of Vibrations


Lecture 3 - SDOF System, Types of Vibrations, Free Vibration


Lecture 4 - Problems on Tortional Motion


Lecture 5 - Damped Free Vibrations


Lecture 6 - Damped Free Vibrations, Definition of Critical Damping and problems


Lecture 7 - Decay of Motion


Lecture 8 - Forced Vibrations, Dynamic Magnification Factor


Lecture 9 - Maxwells 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 (MDOF) Systems


Lecture 14 - (MDOF) System : Equation of Motion, Longitudinal Waves in an Infinitely long rod


Lecture 15 - 3 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


Lecture 18 - Stresses in Soil Element, Field Tests, Seismic Reflection Test


Lecture 19 - Seismic Refraction Test, SASW Test, Laboratory & Model Tests


Lecture 20 - Centrifuge Tests Stress Strain Behavior of Cyclically Loaded Soils


Lecture 21 - Estimation of Gmax, Modulus Reduction Curves, Variation of Damping Ratio, Cyclic Plate load Test


Lecture 22 - Liquefaction, Preliminary sceening, 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 v BPT, SASW Test


Lecture 25 - Types of Machine Foundations, Methods of Analysis, Design of Machine Foundations as per IS:2974 (Part-1)-1969


Lecture 26 - Tschebotarioff's


Lecture 27 - Problem on Tschebotarioff's method contd., 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, Constant 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 II


Lecture 34 - Liquefaction mitigation methods,Vibro Compaction,Densification Techniques


Lecture 35 - Soil Improvement methods,Dynamic Compaction,Reinforcement Techniques


Lecture 36 - Force-based Analysis,Dynamic analysis using MSD model


Lecture 37 - Behaviour of Subgrade Soil below Rail Track


Lecture 38 - Quiz