CURRICULAM –VITAE
VISHWAS A. SAWANT
Permanent Address
201, Vishalgad,
I.I.T. Bombay Staff C. H. S.,
Powai, Mumbai 400076,
India
Phone +91-22-25707686
Email [email protected]
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Assistant Professor
Deptt of Civil Engg
I I T Roorkee
Present Address
132/3, Vikas Nager,
I.I.T. Roorkee Staff Quarters,
Roorkee, 247667
India
Phone +91-1332-286892
Email [email protected]
October 1990 Passed B.E. Civil from Mumbai University with 63.4%.
March 1991 Passed Graduate Aptitude Test in Engineering with 94.86 percentile.
February 1993 Passed M.Tech from Indian Institute of Technology, Powai, Mumbai with CPI
of 8.65/10. I have worked on Analysis of Laterally Loaded Pile for M. Tech Dissertation.
Here, Moment Area method was used for analysis of pile.
March 1998 Completed Ph.D from Indian Institute of Technology, Powai, Mumbai with CPI of
9.20/10. My research topic for thesis was Finite Element Analysis of Laterally Loaded Pile
and Pile Groups. A parametric study is conducted to investigate the behaviour of a single pile
and pile groups, embedded in homogeneous clay, subjected to one-way and two-way cyclic
lateral loading. Semi-analytical finite element method is used for analysis of single (circular)
pile, whereas, three-dimensional finite element formulation is employed for the analysis of pile
groups. Pile and pile cap are assumed to be linearly elastic. The material nonlinearity of soil
medium is represented by a bilinear model, in which, yield surface is defined by von-Mises
yield criterion. The effect of cyclic loading is incorporated by allowing reduction of soil
modulus and yield stress, with increasing cyclic strain, at every cycle. An attempt has also been
made to consider the aspect of geometrical nonlinearity, using 3-D finite element analysis.
September 1997 Joined Datta Meghe College of Engg. Airoli, Navi Mumbai as a Lecturer.
February 2000 Joined M.G.M. College of Engineering & Technology. Kamothe, Navi Mumbai
as Assistant Professor.
December 2000 Received Best Paper IGS-AIMIL Biennial Award (National Award) for year
1998-99 to paper entitled 'Analysis of Pile Groups subjected to Cyclic Lateral Loading'
published in Indian Geotechnical Journal, Vol. 29, No 3, July 1999 (pp 191-220).
September 2001 Joined as a Senior Structural Engineer in Zentech India Offshore & Marine
Engg. Pvt Ltd. I was involved in development of Structural Analysis & Design software
StruCAD*3D for Offshore Structures. I was also using ABAQUS & FEMAP for analysis.
June 2003 Joined University of Malaysia Sarawak as a Lecturer.
May 2005 Delivered a Lecture on ‘Analysis Of Building Frames With Soil-Structure
Interaction’, in the Workshop ‘Computer Aided Analysis and Design - Finite Element
Analysis and Design of RC Buildings’ arranged at University Malaysia Sarawak, a joint
venture with Asian Institute of Technology Bangkok.
December 2008 Received Best Paper Award in National Conference on "Innovations and
Applications of Mathematical Modeling Techniques in Engineering System", 10th December
2008
Till today I have published (46+10) Research Papers related to Analysis of Pile and Pile
Groups, Pavement Analysis. Ten out of them are in Journals (4 international & 6 national).
CURRICULAM –VITAE
VISHWAS A. SAWANT
Assistant Professor
Deptt of Civil Engg
I I T Roorkee
A) PERSONAL DETAILS
Dr. Vishwas A Sawant
Assistant Professor Indian Institute of Technology Roorkee
from 4 May 2007
3. Area of Specialization Geotechnical Engineering (Soil-Structure Interaction)
02-08-1968
Place of Birth Mumbai
Age 40Years
4. Date of Birth
5. Date of Appointment As Lecturer – 02-09-1997
As Assistant Professor – 02-02-2000
1. Name
2. Current Position
6. Educational Qualifications
Degree
Ph. D
M. Tech
B.E.
Civil
Specialization
Institute/University
Year
Pile
Foundation
Indian Institute of Technology,
Powai, Mumbai
16-03-1998
Offshore Engg Indian Institute of Technology,
Powai, Mumbai
Sardar Patel College of
Engineering, Andheri, Mumbai
02-02-1993
June 1990
Title of Thesis
Finite Element Analysis
of Laterally Loaded Pile
and Pile Groups.
Analysis of Laterally
Loaded Pile.
Project Management in
Civil Engineering
7. Previous Experience
Institution
S V National Institute of Technology
Surat
University of Malaysia Sarawak
Zentech India Offshore & Marine
Engineering, Mahape, Navi Mumbai
M.G.M. College of Engineering &
Technology. Kamothe, Navi Mumbai
Datta Meghe College of Engineering,
Airoli, Navi Mumbai
Position
Assistant Professor
From
11-12-2006
To
Period
30-04-2006 5 Month
Lecturer
Senior Structural
Engineer
Assistant Professor
Professor & Head
Lecturer
25-06-2003
14-09-2001
24-06-2006 3 Year
23-06-2003 1Year
9Month
08-08-2001 1.5 Year
08-12-2006 6 Month
02-02-2000 2Year
5Month
03-02-2000
June 2006
02-09-1997
Awards
 Best Paper IGS-AIMIL Biennial Award for year 1998-99 (National Award) to paper entitled
'Analysis of Pile Groups subjected to Cyclic Lateral Loading' published in Indian Geotechnical
Journal, Vol. 29, No 3, July 1999 (pp 191-220)
 Best Paper Award in National Conference on "Innovations and Applications of Mathematical
Modeling Techniques in Engineering System", 10th December 2008
Membership
 Indian Geotechnical Society, Mumbai Chapter (Life Member)
 Indian Society for Hydraulics
(Life Member LM 561)
 Indian Geotechnical Society
(Life Member LM 2719)
Organization of Workshop
1. Two day Workshop I-SCAAD 2005 on ‘Computer Aided Analysis and Design - Finite
Element Analysis and Design of RC Buildings’ 25-26 May 2005 at University Malaysia
Sarawak, a joint venture with AIT Bangkok. Delivered a Lecture Analysis Of Building Frames
With Soil-Structure Interaction
2. Two day Workshop on ‘Structural Steel Design and Application’ 7-8 September 2005 at
Kuching, a joint venture by University Malaysia Sarawak and Malaysian Structural Steel
Association.
CURRICULAM –VITAE
VISHWAS A. SAWANT
Assistant Professor
Deptt of Civil Engg
I I T Roorkee
Details Of Research Publications
International Journals:
1 V. A. Sawant and D. M. Dewaikar, (1999), ‘Analysis of Pile Subjected to Cyclic Lateral
Loading’, Geotechnical Engineering Journal, South-East Asian Geotechnical Society, Vol. 30,
No. 1, April 1999, 25-40
2 V. A. Sawant, Norazzlina M Sa’don (2007), ‘Flexural Stress Analysis of Rigid Pavements
Using Axi-symmetric and Plane Strain FEM’, Asean Journal of Science and Technology for
Development, 24(4), 2007, 443-451
3 D.M. Dewaikar, B. G. Mohapatro, V. A. Sawant, H. S. Chore, ‘Computation Of Bearing
Capacity Factor Nq – Terzaghi And Prandtl Mechanism’, Asean Journal of Science and
Technology for Development, 25(2), 2008, 227-336.
4 V. A. Sawant, (2009) ‘Dynamic Analysis of Rigid Pavement with Vehicle-Pavement
Interaction’, International Journal of Pavement Engineering, 10(1), February 2009, 63-72
Indian Journals:
1. V. A. Sawant, N. B. Amin and D. M. Dewaikar, (1996), 'Response of a Pile to Cyclic Lateral
Loads Using Moment Area Method', Indian Geotechnical Journal, 26(4), 1996, 353-363
2. V. A. Sawant and D. M. Dewaikar, (1999), ‘Analysis of Pile Groups subjected to Cyclic Lateral
Loading’, Indian Geotechnical Journal, 29(3), 1999, 199-220
3. D. M. Dewaikar, B. G. Mohapatro,V. A. Sawant, and H. S. Chore, ‘Computation of Nγ for a
Smooth Footing - Hill Mechanism’, Indian Geotechnical Journal, 37(2), 2007, 132-142
4. D.M. Dewaikar, S.P. Varghese, V. A. Sawant, and H. S. Chore, ‘Non-linear 3-D FEA of
Laterally Loaded Piles Incorporating No-tension Behaviour of Soil’, Indian Geotechnical
Journal, 37(3), 2007, 174-189
5. V. A. Sawant, H. S. Chore, ‘Dynamic Analysis Of Building Frame Supported On Pile
Foundation’, Journal of Structural Engineering, Chennai, 35(4), 2008, 255-263
6. G. S. Kame, V. A. Sawant, ‘Parametric Study of Raft Foundation using FEM’, Journal of
Structural Engineering, Chennai, India, 35(5), 2008, 383-389
In Press
1. V. A. Sawant, ‘Stochastic Finite Element Analysis of Pile Using FOSM’, Journal of Australian
Geomechanics, March 2009
2. V. A. Sawant, G. S. Kame, ‘Study of Piled Raft Foundation using FEM’, ICFAI Journal of
Structural Engineering, March 2009
Papers accepted to Journals
1. V. A. Sawant, ‘Effect of Mass and Velocity of Air-craft on Response of Rigid Pavement’,
Accepted for Geotechnical Engineering Journal, South-East Asian Geotechnical Society
2. D. M. Dewaikar, R. S. Salimath, V. A. Sawant, ‘A modified p-y curve for the analysis of a
laterally loaded pile in stiff clay’, Accepted for DFI Journal, 2009
International Conference:
1. Karthikanand P. Krishnan, D. M. Dewaikar, V. A. Sawant, (1996), 'Analysis of Laterally
Loaded Pile', International Conference in Ocean Engineering COE'96, IIT Madras, India, 17-20
December 1996, pp 288-291
2. V. A. Sawant, D. M. Dewaikar, Karthikanand P. Krishnan, (1996), 'Analysis of a Pile subjected
to Cyclic Lateral Loading', International Conference in Ocean Engineering COE'96, IIT
Madras, India, 17-20 December 1996, pp 292-297
3. S. R. Lavande, D. M. Dewaikar, V. A. Sawant, (1999), ‘Analysis of Laterally Loaded Pile
Group’, GEOSHORE International Conference On Offshore and Nearshore Geotechnical
Engineering, December 2-3, 1999, pp 321-323
4. A. V. Navale, D. M. Dewaikar, V. A. Sawant, (1999), ‘Analysis of Pile for Cyclic Loading’,
GEOSHORE International Conference On Offshore and Nearshore Geotechnical Engineering,
December 2-3, 1999, pp 289-293
CURRICULAM –VITAE
VISHWAS A. SAWANT
Assistant Professor
Deptt of Civil Engg
I I T Roorkee
5. V. A. Sawant and D. M. Dewaikar, (2001), ‘Geometrically Non-linear 3-D Finite Element
Analysis of a Single Pile’, 10th International Conference on Computer Methods and Advances
in Geomechanics, January 7-12 2001, Arizona, pp 1485-1487 .
6. H. S. Chore and V. A. Sawant, (2004), ‘FEM Analysis of Pile Group Subjected to Axial Load’,
International e-Conference on Modern Trends in Foundation Engineering: Geotechnical
Challenges and Solutions, IIT Madras, Chennai, India, 26-30 January 2004,
http://www.ecfg.iitm.ac.in/pdf/Analysis_of_Pile_Group.pdf
7. V. A. Sawant (2005), ‘Dynamic Analysis of Rigid Pavement with Vehicle-Pavement
Interaction’, International Conference on Structural and Road Transportation Engineering
START 2005, IIT Kharagpur, 3-5 January 2005, pp 413-420
8. V. A. Sawant, Mensan Gandai, (2005), ‘Pile Cap and Soil Interaction in Analysis of Pile
Group', Proceedings of The AEESEAP International Conference, Kuala Lumpur, 7-9 June
2005, CDROM, ISBN No 983-100-293-8, PTS3-3-1.pdf
9. V. A. Sawant, Ong Chee Zen, (2005), ‘Slope Stability Analysis Using Morgenstern-Price
Method', Proceedings of The AEESEAP International Conference, Kuala Lumpur, 7-9 June
2005, CDROM, ISBN No 983-100-293-8, PTS4-3-1.pdf
10. V. A. Sawant and H. S. Chore, (2006), ‘Effect of Pile Configuration on Response of Pile
Groups’, Second International Congress on Computational Mechanics and Simulation
(ICCMS_06), Organized by Indian Institute of Technology, Guwahati, 8-10 December 2006, pp
1884-1888
11. D.M. Dewaikar, S.P. Varghese, V. A. Sawant And H. S. Chore, (2007), ‘Non-Linear 3-D FEA
of Laterally Loaded Pile Group’, First Sri Lankan Geotechnical Society International
Conference On Soil and Rock Engineering, Colombo, August 6-11, 2007
12. V. A. Patil and V. A. Sawant, ‘Effect of Velocity and Soil Modulus on Pavement Response’,
Proceedings of ICTACEM 2007, International Conference on Theoretical, Applied,
Computational and Experimental Mechanics, December 27-29, 2007, IIT Kharagpur, India,
ICTACEM-2007/311
13. V. A. Sawant, ‘Analysis of Pile Using Point Estimate Method’, 12th IACMAG Conference Goa
2008, 3103-3110
14. G S Kame, K Borgaonkar, V A Sawant, ‘A Parametric Study on Raft Foundation’, 12th
IACMAG Conference Goa 2008, 3077-3085
Indian Conference:
1. V. A. Sawant, N. B. Amin and D. M. Dewaikar, (1994), 'Analysis of Laterally Loaded Pile by
Moment Area Method', National Seminar on Numerical and Analytical Methods in
Geotechnical Engg. : Developments, Applications and Future Trends, IIT Delhi, pp II 3.1-3.9
2. Karthikanand P. Krishnan, D. M. Dewaikar, V. A. Sawant, (1996), 'Cyclic Response of Single
Pile in Nonhomogeneous Soil', Indian Geotechnical Conference, December 11-14 1996,
Madras, pp 565-568
3. S. B. Gite, D. M. Dewaikar, V. A. Sawant, (1997), 'Analysis of a Laterally Loaded Pile in a
Multilayered Soil System', Conference on Ship and Ocean Technology (SHOT'97), IIT
Kharagpur, India, March 5-7, 1997
4. S. B. Gite, D. M. Dewaikar, V. A. Sawant, (1997), 'Cyclic Lateral Response of Pile in Layered
Soil System', Second Indian National Conference on Harbour and Ocean Engineering ( Inchoe97 ), Thiruvananthapuram, December 7-10, 1997, pp 288-294
5. V. A. Sawant and D. M. Dewaikar, (1997), 'Analysis of Pile Groups Subjected to Cyclic Lateral
Loading', Second Indian National Conference on Harbour and Ocean Engineering (Inchoe-97),
Thiruvananthapuram, December 7-10, 1997, pp 344-354
6. V. A. Sawant, D. M. Dewaikar, (1997), 'Analysis of Laterally Loaded Pile by Semi-analytical
and 3-D Finite Element Method', Indian Geotechnical Conference, December 17-20 1997,
Vadodara, pp 149-152
CURRICULAM –VITAE
VISHWAS A. SAWANT
Assistant Professor
Deptt of Civil Engg
I I T Roorkee
7. S. B. Gite, D. M. Dewaikar, V. A. Sawant,, (1997), 'Analysis of Laterally Loaded Pile in
Layered Soil System', Indian Geotechnical Conference, December 17-20 1997, Vadodara, pp
211-214
8. S. R. Lavande, D. M. Dewaikar, V. A. Sawant, (1998), ‘Nonlinear Analysis of Laterally Loaded
Pile Group’, Indian Geotechnical Conference, December 7-10 1998, Delhi, pp 135-137
9. V. A. Sawant, D. M. Dewaikar, (1999), ‘Geometrically Non-linear 3-D Finite Element Analysis
of a Single Pile’, Indian Geotechnical Conference, December 17-19 1999, Calcutta, pp 69-70.
10. N. L. Shelke, S. M. Rangari, H. S. Chore, V. A. Sawant, (2000), 'Analysis of Pile Group
Subjected to Lateral Load’, SSIP-2K National Seminar On Soil Structure Interaction Problems,
October 29, 2000, Kakinada, pp 105-116
11. A. S. Chavan, Prakash Jattani, Jigar Khambhata, V. A. Sawant, (2000), ‘Analysis of Pile
Group’, Indian Geotechnical Conference, December 13-15 2000, Mumbai, pp 187-188
12. H. S. Chore, V. A. Sawant, (2002), 'Finite Element Analysis of Laterally Loaded Pile Groups’,
Indian Geotechnical Conference, December 2002, PP 545-548
13. A.V. Navale, V. A. Sawant, D. M. Dewaikar, M. D. Goel, (2002), ‘Analysis of Laterally
Loaded Pile Under Cyclic Lateral Loading’, HYDRO-2002, Conference On Hydraulics, Water
Resources & Ocean Engineering, December 2002, pp 316-320
14. V. A. Sawant and H. S. Chore (2003), ' Effect of Pile Spacing on Lateral Response of Pile
Group’, Engineering and Technology Conference 2003, Kuching, Malaysia, pp 84-89.
15. D. M. Dewaikar, M.D. Goel, V. A. Sawant, (2003), ' Ultimate Resistance Of A Laterally
Loaded Pile In A Cohesive Soil’, Indian Geotechnical Conference, December 2003, Roorkee,
pp 129-132
16. V. A. Sawant and H. S. Chore, (2004), ‘Flexural Stress Analysis of Rigid Pavements’, AWAM2004 Conference, University Science Malaysia, P. Pinang, 20-22 July 2004, 9H03 1-5
17. V. A. Sawant and H. S. Chore, (2004), ‘Finite Element Analysis of Rigid Pavements’, National
Symposium on Advances in Geotechnical Engineering 2004, NSAGE-2004 , 22-23 July 2004,
pp 173-178
18. V. A. Sawant and Yong Kuok Soon, (2004), ‘A Study on Sand Drains Considering Smear
Effect’, National Symposium on Advances in Geotechnical Engineering 2004 NSAGE-2004,
22-23 July 2004, pp 373-376
19. V. A. Sawant and Teo Hua Chong, (2004), ‘A Parametric Study on Axially Loaded Pile’,
Indian Geotechnical Conference, 17-19 December 2004, Warangal, pp 340-342
20. H. S. Chore, V. A. Sawant, M. S. Upadhye, (2004), ‘Finite Element Analysis of Building
Frames’, SEM-2004, BITs Pilani, pp 173-177
21. H. S. Chore, V. A. Sawant, (2004), ‘Parametric Study of Socketed Pile Groups to Lateral
Loads’, HYDRO-2004, National Conference On Hydraulics & Water Resources, VNIT
Nagpur, 27-28 December 2004, pp 589-596
22. H. S. Chore, V. A. Sawant, (2006), ‘Effect Of Pile Spacing On Response Of Superstructure
Frames’ National Conference on Advanced Computing Techniques in Civil Engineering, St
Peter’s Engineering College, Chennai, 1 March 2006, pp 63-68
23. V A Sawant and H S Chore, ‘Parametric Study of Pile Group Subjected to Lateral Loads’,
Conference on Challenges and Applications of Mathematical Modeling Techniques in Building
Science and Technology (CAM2TBST), Feb., 7-8, 2008, C.B.R.I., Roorkee, pp 401-409
24. V. A. Sawant, H. S. Chore. ‘3-D FEA of Pile Group Subjected to Lateral Load’, Infrastructure
Development in Civil Engineering 2008 Conference, 493-496
25. V A Sawant, D M Dewaikar , ‘Analysis Of Laterally Loaded Pile’ National Seminar on Recent
Developments in Geotechnical Engineering for Applications in Pavement, Embankment and
Retaining Wall Constructions, Thursday, November 13, 2008
26. V. A. Patil, V. A. Sawant, Kousik Deb, ‘Effect of Velocity and Mass of Air-Craft on Response
of Rigid Pavement’, National Conference on "Innovations and Applications of Mathematical
Modeling Techniques in Engineering System", 10th December 2008
CURRICULAM –VITAE
VISHWAS A. SAWANT
Assistant Professor
Deptt of Civil Engg
I I T Roorkee
27. V A Sawant, H S Chore, ‘3-D FEA of Pile Group Subjected to Lateral Load’, Indian
Geotechnical Conference 2008, 125-128
28. G S Kame, N L Shelke, M Raffiqe, V A Sawant, ‘Parametric Study of Raft Foundation Using
FEM’, National Conference on Urban Infrastructure Development- Issues and Challenges,
NCUID-08, MVSR Engineering College Hyderabad, December 2008, 62-72
29. H S Chore, V A Sawant, ‘Effect of Soil Structure Interaction on Response of Building Frame’,
National Conference on Urban Infrastructure Development- Issues and Challenges, NCUID-08,
MVSR Engineering College Hyderabad, December 2008, 160-172
30. V A Sawant, H S Chore, B. Manjula Devi, ‘Parametric Study of Flexural Behaviour of
Concrete Pavement’, National Conference on Trends and Challenges in Structutal Engineering
and Construction Technologies, 11-12 February 2009, CBRI Roorkee, 461-469
31. V A Sawant, H S Chore, R S Kedar, ‘Analysis of Laterally Loaded Pile Embedded in
Cohesionless Soil’, National Conference on Trends and Challenges in Structutal Engineering
and Construction Technologies, 11-12 February 2009, CBRI Roorkee, 478-485
32. V. A. Patil, V. A. Sawant, Kousik Deb, ‘Response Of Rigid Pavement To Moving Load Using
Pasternak Model’, Student Symposium on "Research in Civil Engineering", 5-6 March, 2009,
Chennai
CURRICULAM –VITAE
VISHWAS A. SAWANT
Assistant Professor
Deptt of Civil Engg
I I T Roorkee
Faculty Initiation Grant
Dynamic Response of Pile Group Using 3D FEA (IITR/SRIC/58/FIG) Amount 330,000/Consultancy Projects
Project Number
Project
Amount
CED-2151/2007-2008
Investigation of CBR Value on Samples of Kotdwar Pulida
Road
40000/-
CED-2187/2007-2008
Properties of Fly Ash of Panchi Gujran-Panipat Section
22000/-
CED-TEST-000
Investigation of Shear Strength & Compaction Parameters on
Samples Local Sand Saharanpur
20000/-
Delivered Lectures
1. Delivered a Lecture on ‘Analysis Of Building Frames With Soil-Structure Interaction’, in
the Workshop ‘Computer Aided Analysis and Design - Finite Element Analysis and Design of
RC Buildings’ arranged at University Malaysia Sarawak, a joint venture with Asian Institute of
Technology Bangkok.
2. Delivered a Lecture on Pile Foundation in the Short Term Course on ‘Geotechnical
Investigations in Civil Engineering Projects & Ground Improvement Techniques for
Difficult Ground Condition’ organized by Institution of Engineers (India) Roorkee Local
Centre July 3-7 2007.
3. Delivered a Lecture on ‘Nonlinear Finite Element Analysis’, in the Workshop ‘INLFEA
2007’ organized by Indian Institute of Technology Madras October 8-18, 2007.
CURRICULAM –VITAE
VISHWAS A. SAWANT
Assistant Professor
Deptt of Civil Engg
I I T Roorkee
Abstract of Ph. D Thesis on
FINITE ELEMENT ANALYSIS OF LATERALLY LOADED PILE AND PILE GROUPS
A large number of offshore structures are supported on pile foundation. The structures like fixed
offshore platforms are subjected to various types of loading, which include, in addition to static
loads, the cyclic loading due to wave action.
A parametric study is conducted to investigate the behavior of a single pile and pile groups,
embedded in homogeneous clay, subjected to one-way and two-way cyclic lateral loading. Semianalytical finite element method is used for analysis of single (circular) pile, whereas, threedimensional finite element formulation is employed for the analysis of pile groups. Pile and pile
cap are assumed to be linearly elastic. The material nonlinearity of soil medium is represented by a
bilinear model, in which, yield surface is defined by von-Mises yield criterion. The non-linear
behaviour of interface is also modeled by bilinear relationship between interface shear stress and
relative shear displacement. The effect of cyclic loading is incorporated by allowing reduction of
soil modulus and yield stress, with increasing cyclic strain, at every cycle. The proposed hysteretic
model which simulates the behaviour of soil under cyclic loading conditions, follows actual
loading and unloading paths and thus, is capable of predicting pile response in a more realistic and
rational manner. The development of procedure is based on the evaluation of stresses and strains
pertaining to a constant stiffness, for various iterative steps at every cycle. Results show that effect
of two-way cyclic loading is more severe, as compared to one-way cyclic loading, when
displacements are considered, while, effect on bending moment is observed to be independent of
nature of cyclic load. More increase in moment occurs in the lower half of the pile under cyclic
loading conditions. Results also showed that lateral response of pile group depends on, spacing
between piles, pile cap thickness and arrangement of piles in group with respect to direction of
loading. Pile-soil system in parallel arrangement exhibits stiffer behavior as compared to the one in
series arrangement, for both static and cyclic loading.
An attempt has also been made to consider the aspect of geometrical nonlinearity, using threedimensional finite element analysis. A Lagrangian approach is adopted throughout, in which,
displacements are referred to the original configuration. Incremental approach is used in the
analysis, in which stiffness matrix is updated after every increment of load. The analysis clearly
indicates significant change in the response of piles, which have considerable unsupported length,
and presence of axial load.
CURRICULAM –VITAE
VISHWAS A. SAWANT
Assistant Professor
Deptt of Civil Engg
I I T Roorkee
Statement of Research
Research Areas
I am working on Analysis of Pile and Pile Groups, Finite Element modelling of heat transfer
through soil media, Pavement analysis, and sand-drain. I was also involved in development of
Structural Analysis & Design software StruCAD*3D for Offshore Structures.
1. Details of Sponsored Projects handled in Industry
Improved Life Prediction of Turbine Engine Components
Final version is to be delivered to AFRL at the end of the project. The scope of project is the
complete validation of Zencrack (with Abaqus interface), against AFGROW and against test data,
if available. We started our validation work with a bar having a semi-circular edge crack and
subjected to remote tension (designated as ‘EGT’ to mean Edge Crack Tension). This model had
dimensions 16mm x 5mm x 2mm. Only a quarter of the bar (8x5x1) was analyzed making use of
symmetry in the thickness and length directions.
The initial crack was taken as semi-circular in all cases with a radius of 0.05mm. Four
combinations of the maximum external tension (Smax) and stress ratio (R) were considered as
shown in the following table. In all cases the ‘large’ crack-block, sq496x8, was utilized which
allowed large crack growth without mesh distortion or without a need to use ‘split’ elements with
the crack-block moved to the adjacent element of the uncracked specimen. The tabular crack
growth data was used along with the constant G integration algorithm (Method 1). The maximum
number of FEA was set at 99, the program limit. The crack growth analysis was carried out using
the ‘adaptive’ scheme, which does not require the definition of a tolerance on dN between finite
element analyses. In all cases TOLA, the basic tolerance limit for crack growth, was chosen as
0.005mm representing 10% of the initial crack size. The other tolerance parameters were used to
reduce the permissible increment in the crack size in the early stages of integration by a factor equal
to (j/10)2, where j is the integration step number (i.e. the number of the previous FEA) and to
increase it by a factor of 1.05 (or 1.1) in successive integration steps once the effective (da/dN) had
exceeded the limit of 1.0e-3 (or 3.0e-6). The comparison of the Zencrack results for the external
stress (500Mpa and 1000Mpa) , for R=0.0 with those from Afgrow shows the agreement is good
for up to about 90% of the computed life, but beyond this range Afgrow appears to overestimate the
crack growth leading to an underestimation of the fatigue life.
2. Details of Sponsored Projects handled in University Malaysia Sarawak
Flexural Stress Analysis of Rigid Pavements
Design of pavement involves a study of soils and paving materials, their behavior under load, and
climatic conditions. All pavements derive their ultimate support from the underlying sub-grade.
The rigid pavements because of its rigidity and high modulus of elasticity, tends to distribute load
over a wide area of soil. Thus a major portion of the structure capacity is imparted by slab itself.
The major factor considered in the design of rigid pavements is the structural strength of concrete
and minor variations in sub-grade strength have little influence on the structural capacity of
pavement.
In the present study, an attempt has been made to compare stresses predicted using two finite
element analyses. First analysis is based on the two-dimensional plane strain assumption where as
in second approach axi-symmetric condition is assumed to consider three-dimensional behavior of
rigid pavement. The results are compared with flexural stresses obtained from conventional
Portland Cement Association method. The computed flexural stresses obtained from axi-symmetric
condition are found to be in close agreement with PCA method. Results of plane strain analysis
show a fair agreement after application of an appropriate multiplication factor. The analysis is
extended to consider non-linear effect using von-Mises yield criterion and no-tension soil
behaviour.
CURRICULAM –VITAE
VISHWAS A. SAWANT
Assistant Professor
Deptt of Civil Engg
I I T Roorkee
Statement of Teaching Experience
Courses Taught:
No Subject
1
2
Soil Mechanics
Foundation Engineering
3
Advanced Foundation
Engineering
Soil Dynamics
Structural Analysis-I
Traffic Engg. & Control
Advanced Structural Mechanics
Nonlinear Analysis
Analysis of Offshore Structures
Numerical Methods
Engineering Programming
Rock Mechanics
Design of Earthquake Resistant
Structures
Finite Element Analysis
Soil Dynamics
Seepage in Foundations & Earth
Structures
CAD of Foundations
Advanced Foundation
Engineering
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
Post Graduate Students
Master’s ( Completed 3, Ongoing 3)
Ph D. (Ongoing 1)
UG/ Years
PG
UG 1997-2000,2003 (05)
UG 1998-2001,2004-05
(06)
UG 2003, 2005
Alone/Joint
Instructor
Alone
Alone, Joint(2004-05)
UG
UG
UG
PG
PG
PG
UG
UG
UG
PG
2000(01)
1998-1999 (02)
1998-1999 (02)
2002(01)
2002,2006(02)
2003(01)
2004-2006(03)
2000, 2004(02)
2006
2007
Alone
Alone
Alone(98), Joint(99)
Alone
Joint
Alone
Alone
Alone
Joint
Joint
PG
PG
PG
2007
2007
2007
Alone
Joint
Alone
PG
PG
2008
2007
Alone
Alone
Alone