pile soil interaction by finite element method in abaqus

61 Pages·2017·1.6 MB·English

PILE SOIL INTERACTION BY FINITE
ELEMENT METHOD IN ABAQUS

Submitted in partial fulfilment of the requirements
of the degree of Bachelor of civil engineering

by

Mr. Ansari Azhar Niyaz 13CES07

Mr. Ansari Junaid Ahmed Shafeeque Ah. 13CES08

Mr. Barudgar Mohd Atique Sadique 13CES11

Mr. Khan Abid Noor 13CES20

Supervisor(s):

Prof. Dada.S.Patil

Department of Civil engineering
School of Engineering and Technology

Anjuman-I-Islam’s Kalsekar Technical Campus
Plot No. 2 & 3, Sector-16, Near Thana Naka, Khandagaon
New Panvel, New Mumbai 410206,
2016-2017
CERTIFICATE

This is to certify that Mr. Ansari Azhar Niyaz (13CES07), Mr. Ansari Junaid Ahmed
Shafeeque Ah. (13CEs08), Mr. Barudgar Mohd Atique Sadique (13CEs11) and Mr. Khan Abid
Noor (13CEs20) are the students of Semester-VIII of B.E. Civil has satisfactorily completed
and delivered a special topic, seminar report on “Soil-Pile Interaction by Finite Element
Method in Abaqus” in partial fulfilment for the completion of the B.E. in Civil Engineering
course conducted by the University of Mumbai in Anjuman-I-Islam’s Kalsekar Technical
Campus, New Panvel, Navi Mumbai, during the academic year 2016-2017

Prof. Dada.S.Patil
(Guide)

Dr. R. B. Magar Dr. Abdul Razak Hunnutagi
(HOD) (Director)

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PROJECT REPORT APPROVAL FOR B. E
This B. E. Project Part-A entitled “Pile Soil Interaction by FEM in Abaqus” Mr.
Ansari Azhar Niyaz (13CES07), Mr. Ansari Junaid Ahmed Shafeeque Ah.
(13CES8), Mr. Barudgar Mohd Atique Sadique (13CES11), Mr. Khan Abid Noor
(13CES20) by Dada.S.Patil is approved for the degree of Bachelor of Engineering
in Civil Engineering.

Examiners
1. …………………………
2. …………………………
Supervisors:
1. …….…………………….
2. …………………………

Chairman
………………………………

Date: 5-May-2017
Place: Panvel
iii
DECLARATION
We Mr. Ansari Azhar Niyaz (13CES07), Mr. Ansari Junaid Ahmed Shafeeque Ah.
(13CES8), Mr. Barudgar Mohd Atique Sadique (13CES11), Mr. Khan Abid Noor
(13CES20) Civil engineering student of Anjuman Islam Kalsekar Technical Campus,
hereby declare that I have completed the project titled Soil-Pile Interaction by Finite Element
Method in Abaqus during the academic year 2016-2017. I declare that this written submission
represents my ideas in my own words and where others' ideas or words have been included, I
have adequately cited and referenced the original sources. I also declare that I have adhered to
all principles of academic honesty and integrity and have not misrepresented or fabricated or
falsified any idea/data/fact/source in my submission. I understand that any violation of the
above will be cause for disciplinary action by the Institute and can also evoke penal action from
the sources which have thus not been properly cited or from whom proper permission has not
been taken when needed.

Mr. Ansari Azhar Niyaz(13CES07)

Mr. Ansari Junaid Ahmed Shafeeque Ah(13CES8)

Mr. Barudgar Mohd Atique Sadique(13CES11)

Mr. Khan Abid Noor(13CES20)

iv
ACKNOWLEDGEMENT
It is to express our sincerest regards to our project Guide, Prof. Dada.S.Patil for their valuable
inputs, valuable, guidance, encouragement, whole-hearted cooperation throughout the duration
of our project.

We deeply express our sincere thanks to our Head of Department Dr. R. B. Magar and our
Director Dr. Abdul Razak Hunnutagi for encouraging and allowing us to present the project
on the topic “Pile Soil Interaction by Finite Element Method in Abaqus” in partial
fulfilment of the requirements leading to the award of Bachelor of Civil Engineering degree.

We take this opportunity to thank all our Professors and non-teaching staff who have directly
or indirectly helped our project, especially Prof. Shaikh Wasim. We pay our respects and love
to our parents and all other family members and friends for their love and encouragement
throughout our career.

Mr. Ansari Azhar Niyaz

Mr. Ansari Junaid Ahmed Shafeeque Ah.

Mr. Barudgar Mohd Atique Sadique

Mr. Khan Abid Noor

(Semester- VII &VIII, B.E. Civil)

AIKTC- New Panvel

Navi Mumbai.
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ABSTRACT
Soil is a complex, heterogeneous material, having a strongly nonlinear response under action
of external load. Due to this the constitutive laws associated to various soil types (cohesive,
non-cohesive, saturated or unsaturated etc.) are continuously developed and improved. Analysis
of soil had been and still a very challenging task for geotechnical engineers throughout the
world. This is due to the non-linear behavior of soil and inability of constitutive relations in
predicting exact behavior of soil. To overcome these difficulties in analysis, there is various
material models has been developed with more complex constitutive relationship. Material
models such as Mohr-Coulomb model uses very complex constitutive relationship. Solution of
this complex partial differential equation is tedious and time consuming process, hence Finite
Element Method is used to solve these equations.
Present study focuses on the settlement analysis of pile foundation in a cohesive soil by using
Mohr- Coulomb model. In addition to settlement analysis, this study also incorporates soil-
structure interaction between pile and soil. The results obtain after the analysis shall be
compared with analysis without soil-structure interaction and conclude the suitability of using
Soil-Structure interaction in pile settlement analysis.
KEY WORDS: Constitutive relationship, Mohr-Coulomb Model, Finite Element Method,
Soil-Structure Interaction
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CONTENTS
1
Project Report Approval for B. E iii
Declaration iv
Acknowledgement v
Abstract vi
Contents vii
List of figures ix
List of tables x
Abbreviation Notation and Nomenclature xi
Chapter 1 Introduction 1
1.1 Abaqus 2
1.2 Finite element method (F.E.M) 2
1.2.1 Historical Background 3
1.2.2 Basic Steps 5
1.2.3 Advantages of the finite element method over other numerical methods 6
1.2.4 Constitutive model: theory and implementation 7
1.3 Objective of project 18
1.4 Scope of project 19
Chapter 2 Literature Review 20
Chapter 3 Methodology 30
3.1 Finite element modelling 31
3.1.1 Mesh and boundary conditions 31
3.1.2 Constitutive modelling 32
Chapter 4 Validation to Software 33
4.1 General 33
4.2 Module 34
4.2.1 The part module 34
4.2.2 The Property module 34
4.2.3 The Assembly module 35
4.2.4 The Step module: 35
4.2.5 The Load module: 35
4.2.6 The Mesh module: 36
4.2.7 The Job module: 39
4.2.8 The Sketch module: 39
4.3 Contours 40
4.4 X–Y data 40
4.5 Result 41
Chapter 5 Analysis and results 43
5.1 Analysis on pile 43
vii
5.1.1 Effect of different size of mesh of pile 43
5.1.2 Effect of the diameter of the pile 46
Chapter 6 Conclusion 48
References 50
viii
LIST OF FIGURES
Figure 1:1 Transverse Isotropy coordinate axes convention .................................................... 10
Figure 1:2 Mohr-Coulomb failure criteria ................................................................................ 14
Figure 1:3 Domain used in the definition of the flow rule ....................................................... 15
Figure 3:1 (i)Typical finite element mesh (ii)Pile soil interface modelling (a) no slip (b) slip
(c) Coulomb’s frictional law............................................................................................. 32
Figure 4:1 Part module ............................................................................................................. 34
Figure 4:2 Property Module ..................................................................................................... 35
Figure 4:3 Boundary condition ................................................................................................. 36
Figure 4:4 Mesh ........................................................................................................................ 37
Figure 4:5 Slave mesh .............................................................................................................. 38
Figure 4:6 Master mesh ............................................................................................................ 38
Figure 4:7 Deformed shape ...................................................................................................... 40
Figure 4:8 Displacement v/s Load ............................................................................................ 41
Figure 4:9 Stress blub ............................................................................................................... 42
Figure 4:10 Terzaghi’s shear failure zones............................................................................... 42
Figure 3:2 Load vs Settlement curve of the pile (for different mesh size) ............................... 45
Figure 3:3 Settlement of pile model ......................................................................................... 45
Figure 3:4 Settlement of the Pile (cross section) ...................................................................... 46
Figure 3:5 Load vs Settlement curve (Increase in Diameter) ................................................... 47

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LIST OF TABLES
Table 3:1 Properties of Materials 30
Table 3:2 Loading analysis with different mesh size 44

x