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Indian Institute of Technology, Kharagpur

Soil Structure Interaction

Indian Institute of Technology, Kharagpur and NPTEL via Swayam


The course will focus on the different soil-structure interaction models for shallow foundation under various loading conditions and subgrade characteristics. Piles under uplift and lateral loading conditions will also be discussed. In the undergraduate core course on Foundation Engineering, these topics are either not covered or discussed in simplified form. Beams and plates on elastic foundation problems & different foundation models and their solution with the help of Finite Difference Method (FDM) will be discussed. The application of foundation models in real life problems will also be discussed. This course is useful for both UG and PG student. The course is also suitable for students who are preparing for competitive examination. Field Engineers can be benefited from this course as the design of foundations under critical conditions considering soi-structure interaction (those are not generally covered in UG core foundation engineering course) will be discussed here.

INTENDED AUDIENCE : Civil engineering, Geotechnical engineering, Environmental Engineering, Geoenvironmental Engineering
PREREQUISITES : Soil Mechanics and Foundation Engineering
INDUSTRY SUPPORT : Most of the Civil Engineering companies



Week 1 : Introduction, critical study of conventional methods of shallow foundation design: bearing capacity and settlement calculation.Week 2 : Critical study of conventional methods of shallow foundation design (continued), contact pressure and soil-structure interaction for shallow foundation, concept of subgrade modulus, determination of subgrade modulus, parameters influencing subgrade modulus.Week 3 : Determination of subgrade modulus and parameters influencing subgrade modulus (continued). Different foundation models (such as one-parameter, two-parameter models etc.) with linear and non linear stress-strain characteristics.Week 4 : Time-dependent response, Beams on Elastic Foundation, infinite beam.Week 5 : Infinite beam (continued), infinite beam subjected to various loading conditions, semi-infinite beam.Week 6 : Semi-infinite beam (continued), beams with finite length.Week 7 : Beams with finite length and various end conditions, continuity among the foundation soil layers. Week 8 : Continuity among the foundation soil layers (continued), beams on two-parameter soil medium (infinite and finite beam), beam with variable EI and subgrade modulus.Week 9 : Plates on Elastic Foundation (rectangular and circular), plates on two-parameter soil medium, use of Finite Difference Method (FDM) for soil structure interaction problemsWeek 10 : Use of Finite Difference Method (FDM) for soil structure interaction problems (continued), computer programs based solution of different interaction problems such as beams, plates, application of foundation models in real life problem.Week 11 : Group action of pile, Elastic Analysis, settlement of pile group under compressive load by Interaction Factor Approach, negative skin friction.Week 12 : Laterally loaded piles, Reese and Matlock’s generalized solution, displacement of pile group under lateral load by Interaction Factor Approach, Uplift capacity of piles and anchors.

Taught by

Prof. Koushik Deb

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