Review on the Current Development and Application of Plaxis in Vietnam_Prof Nguyen Cong Man_2012_ppt.pdf

7/28/2019 Review on the Current Development and Application of Plaxis in Vietnam_Prof Nguyen Cong Man_2012_ppt.pdf

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PLAXIS IN GEOTECHNICAL ENGINEERING


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REVIEW ON THE CURRENT DEVELOPMENTAND APPLICATION OF PLAXIS IN VIETNAM

Prof Nguyen Cong Man

Water Resources University

Hanoi 24 April 2012



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Content

1. Generality on the short courses of Plaxis BV in Vietnam .

2. Short courses on Plaxis programs organised by Water Resources

University and application in education and practice.

3. Overview of current finite element programs of Plaxis

4. Advance methodology of approaching geotechnical problems. Role of

Finite element softwares

5. Conclusions



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1. Generality on the short courses of Plaxis BV in Vietnam

HWRU is a first one to do connection with Plaxis BV (1997-98), to

invite experts from Netherlands to give course in VN.

Three courses have been organized at WRU. Each Plaxis course

organized, markes again a new progress of Plaxis softwares

1rst - Five days course (2001): Geotechnical Modelling - Plaxis

Short Course - Fundamentals, Theory and Application of Software;

Lecturers: BHP The, E. Biglsma and Bonnier from Family

Plaxis BV. At that time the Plaxis 2D was updated from V 6 to V 7Participants: 34 from different Universities and organizations



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We do not intend to use our course as a

marketing tool for selling the Plaxis program.

We feel our course serve a much wider goal.

Our primary interest is to learn people thenecessary backgrounds needed for successful

application of the FE method in practical

geotechnical engineering. Our lectures are not

plain theoretical, we like to pay close attention

to the aspects necessary to link theory topractice. The theoretical and practical

contents of lectures is put into practice during

examples for which, of course, we use the

Plaxis program. (July 11, 1997 from Mr.P.J.W. Brand).



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Posted on Plaxis Bulletin

N0 12 June 2002



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2nd - Five days course (2007): The Introductory Short

Course on Application of Plaxis Software in Road and HydraulicEngineering

Lecturers: Krystian W. Pilarczyk, BHP The, P. Bonnier, Jaap

Deutekom.At that time the Plaxis 2D updated to V 8 and 3D Foundation,

3D Tunnel developped.

Participants: about 40 from different Universities andorganizations

Each participant/group using USB key for practice



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3rd One day seminar (2006)

Seminar on Plaxis Finite Element code for soil and rockanalysis is organised at WRU

Lecturer. Dr William WL Cheang,principal geotechnical

consultant (with Eddy Tan) ofAsiaPac(2011) SingaporeParticipants. About 40

Content.

PLAXIS Strategy in advanced geotechnical analysis 2-Dimensional Finite Element Analysis

3-Dimensional Finite Element Analysis

Examples with many interesting illustrations were presented.



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2. Short courses on Plaxis programs organised by Water Resources

University and application in education and pratice.

HWRU staffs have given number of Plaxis courses for withinuniversities and companies.

Plaxis software have been used extensively in education - research

and practical works.

Three young lecturers of GE Department were sent to the

Netherland to learn more on Plaxis (Master Eng using Plaxis)

HWRU staffs are step by step to improve lecture notes on Plaxis

and start to use 3D foundation version.

Plaxis course are inserted in the educational program of the

university



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1rst Short course at PECC1

(2002)CT t vn XD in 1Power Engin. Consultant Compa N0 1

We gave lecture using Plaxis 7.2

network version 5 licenses,

purchased at Plaxis BV ( Mr Peter

Brand) (invoice PO 49501).

Short course


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Short course at CDC

Hanoi (2007)(Consultant Designer & Construction Corporation )


Plaxis 2D V.8.2, PlaxFlow V.1,3D Foundation V.1.5, 3D Tunnel V. 2

were introduced

3 teachers from WRU and one from

Institute of Building Science and

Technology.


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Many Plaxis Course for students

of WRU from North & South



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Application of Plaxis for education and production


-50

-45

-40

-35

-30

-25

-20

-15

-10

-5

0

0 0.02 0.04 0.06 0.08

( )

3D

2D

Using Plaxis 3D Found for PhD

thesis at Russian Federation

Nguyen Viet Tuan

Many research subjects of student and

Master thesis using Plaxis 2D & 3D Found

for their work at WRU

Pham Hoai Nam

- Education & Training


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Examples of application of Plaxis for education and production

- Practical workQuan h chuyn v - cc mc thi gian

11/8/08, 0

12/25/08, 542/10/09, 55

6/3/09, 145.5

6/8/09, 96

9/7/09, 415 10/25/09, 431

11/5/09, 876

7/11/09

318

0

100

200

300

400

500

600

700

800

900

1000

11/8/08 12/28/08 2/16/09 4/7/09 5/27/09 7/16/09 9/4/09 10/24/09 12/13/09

Thi gian (thng/ngy/nm)

ln(cm)

a, b. Trong : a:Thng/ngy/nm; b: ln (cm)

Measurement

Analysis using Plaxis

Settlement of sea dyke duringconstruction on soft soil


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Examples of application of Plaxis for education and production

- Practical work

After repairing using Plaxis

to design


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Goal of development of Plaxis

- Protection from River embankment on soft soil of lowlands of Holland -

Plaxis 2D at the begining;

- Extending to cover different topics of geotechnical engineering and soil

models:static elastoplastic deformation, advance soil models, stability analysis,

consolidation, safety analysis, steady-state groundwater flow ;

- Extending add-on modules for seepage and dynamics analysis:

- Digitalisation according to finit element code - Advanced

Steps of development: from easy-to-use Plaxis 2D finit element code to Plaxis3D covering all practical problems met in construction.

Plaxis 3D 2011 is a full three-dimensional Plaxis program which combines an easy-

to-use interface with full 3D modelling facilities.



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Development Time-line

Plaxis BV Company is officially formed in 1993.


1987

V

ersion1

1989

Version2

1990

Version3

1991

Version4

1993

V

ersion5

1995

Version6

1998

Version7

2000

Dynamics

2001

3D

Tunnel

2002

Version8

2003

PlaxFlow

2D

2004

3D

Found.

2010

Plaxis2D

2010

Plaxis3D

2010

PlaxFlow

3D

2011

Dynamics3D

Without Symbol

Note. Until V.6, using floppy disk



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3. Overview of current finite element programs of PlaxisPlaxis V6.1

The last with floppy disk

Edited by

R.B.J Brinkgrevewith co-operation

P.J.W Brand


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2-D Finite Element Codes

- 2D Version 8 2.6 [Newest: Plaxis 2D 2011]

- 2D Dynamics module (add-on) - vibration influence of nearby

structures, excess pore pressure, liquefaction not included.

- 2D PlaxFlow V1.6 (add-on) - Saturated/unsaturated medium,

Steady state and Transient flow analysis.

3-D Finite Element Codes

- 3D Tunnel V 2.4 - essential for tunnel project.

- 3D Foundation V2.1 - excavations, raft foundation, pile raft

foundation and offshore foundation.

- Plaxis 3D 2011 - Newest and most perfect - Dr Williams lecture


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- Plaxis VIP service program. Special extension for plaxis VIP

members benefit from latest releases of their Plaxis software &support from Plaxis technical experts. Only for VIP members

- PLAXIS Introductory Student Pack: DVD + hardcopy version of

the Tutorial Manual 2010, covering lessons that containe typicalprojects modelled with PLAXIS, have been released for students

to learn the basics of 2D and 3D modelling in GE.

- Plaxis Introductory. Introductory version of PLAXIS 2D, 3DFoundation, 3D Tunnel for interested persons a limited

Profession version.


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Some examples


Plaxis 2D

Plaxis 2D

Integrated

-PlaxFlow

-Dynamics


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Deformed mesh


Some examples


Plaxis 3D Tunnel


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New Austrian Tunneling

Method (NATM)


Some examples



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Plaxis 3D Foundation

Some examples



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Some examples



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4. New methodology of approaching geotechnical problems.Role of Finite element software

DevelopmentTrends of Earth Sciences to meet the demand of approachingTrends of Earth Sciences to meet the demand of approaching

geotechnical problemsgeotechnical problems inin Civil Engineering

Monodisciplinary TrendMineralogy - Petrography - Pedology - Morphology - Tectonics - Meteorology

Geophysics - Seismology - Hydrology - Geohydrology - Engineering Geology

(1929) - Soil Mechanics (1925) - Rock Mechanics (1957) ...

Interdisciplinary TrendGeotechnics - Geotechnical Engineering - Environmental Geotechnics

Geomechanics - Applied Geomechanics - Rock Engineering -Hydrogeomechanics -

Environmental Geology ...

GeologyAtmosphere Origin of the Earth

Hydrosphere Its development History

Lithosphere Its Structure

Intersphere Geological Processes


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Definition of Geotechnical EngineeringGeotechnics. The application of Scientific methods & engineering

principles to the acquisition, interpretation & use of knowledge of materialsof the Earth s Crust ( Soil - Rock ) for the solution of engineering problems:the applied science ofmaking the Earth more habitable. It embraces the

fields of S.M and R.M, & many of the engineering aspects of Geology,Geophysics, Hydrology and related sciences; (Glossary of Geology - Robert

L. Bates & Julia A. Jackson -1987).

Geotechnical Engineering. is the application of the sciences of SoilMechanics and Rock Mechanics, Engineering Geology and other

related disciplines to Civil engineering construction, the attractive

industries and the preservation and enhancement of the environment

(Ground Engineering, Nov. 1999 British Geot. Assoc)

Geotechnical Engineering is an interdiscipline, applying the basic

principles of SM, RM, construction technology of Foundation andStructure..., for solving the problems of design, execution, treatment -improvement of all sorts of civil structures, exploitation natural resources,located on, in, interaction with Soil and Rock environments (Nguyen Cong

Man, 1997 )



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Skills needed for Geotechnical Engineering

Ground Engineering Nov. 1999, British Geotec. Associ.

Public Policy

Codes of practice

Standards Law

Contract Law

Specifications

Bill of quantities

Construction

Practices

Experiences

Mechanical Engineering

Instrumentation,

Drilling system, Excavation

Technics, Support

Soil Mechanics

Description,

Effective Stress,

Deformation,

Failure Seepage,

Earth Pressure

Site Exploration

Reconnaissances

Drilling Testing

Parameter selection

Reporting

Rock

Mechanics

Description

Deformation

Failure

Materials Types

Properties

Computer Science

Compatibility

Equilibrium

Rheological Models

Applied

Mechanics

Compatibility

Equilibrium

Rheological Models

Structural

MechanicsElasticity Plasticity

Failure Mechanisma

Geotechnical Engineering

Foundation Design

Bearing capacity

Setlement types

Soil/Rock Mass

Engineered fills

Retaining Structure

Slope

Flood Control

Landfill Barriers Dam

Engineering Irrigation

Ground Improvement

Mechanical, Chemical,

Drainage,Reinforcement

Geochemistry

Solid Waste

Leachate

Hydrology

Fluid type

Fluid Flow

Geology

Mineralogy

Geological

Processes

Groundwater

Ground Movement

Geophysics Vibrations

Earthquakes

Four modules of knowledgeNeeded for GE


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Skills needed for Geotechnical EngineeringNorbert R. Morgenstern, Nov. 2000 GeoEng2000

Geotechnical Engineering

Flood Control

Systems

e.g. damsUnderground

Geo-structurese.g., tunnels

Surface Geo-structures e.g.,

embankments, landfills

Ground Improvement

e.g. densification,

remediation

Structural

Support Systemse.g., foundations

Numerical Analysis

finite elements,

finite differences

Continuum Mechanics

elasticity, plasticity

idealisation

Structural Mechanics

deformation, failure,

member design

Materials

types, properties,

geosynthetics

Soil Mechanics

deformation,failure, seepage

application

Rock Mechanics

deformation,

failure, seepage

application

Hydrology

surface fluid flow

Geology

Composition

genesis processeshydrology

Site Exploration

reconnaissance,

drilling, in-situ

testing, geophysics

Geochemistry

waste

leachates

durability

Ground

Movements

Earthquakes

Public Policy

Codes, standards,

law + compliance

Contract Law

specifications

Construction

practice,

experience

Mechanical Engineering

drilling, instruments

excavation

Risk Management

observational method,

risk assessment,

instrumentation


Four modules of knowledge

needed for GE


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Interdiciplinary

cooperation

Concept of SOWAS & interdiscipline approach

J. van der Weide, 1988

Environment & activity of

man


Structure

Systems

Response

Water SoilRock


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System Response

Design according to limit state:

1.Ultimate State

2.Serviceability State

Russian Norm ( From 1962)

Euro-code.C 7 ( From1997 ) Interdiciplinary cooperation

& research development

Modern methodogy for design:

Capabilities for modelling & solvingthe interactions and processes

Plaxis can meet this requirement

Application of Concept of SOWAS


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Nash Lecture. The teaching of Soil MechanicsA personal view (1987, 1996);

Annon. Definition of Geotechnical Engineering 1999 - Morgenstern, N.R, 2000

The Burland triangle

SoilBehaviour

II

Lab/field testing

Observation.

Measurement

II

Ground

Profile

I

Site Investigation

Ground description

Empiricism,

Precedent,

Experience

IV

AppropriateModel,

IIIModellingConceptual,

Physical, Numerical

analysis


Reference

EUROCODE 7 - Part 2

Exact input is very important


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Eurocode System (ES) Russian Feredation system - Hydraulic branch (RS)

(1) (2) (3) (4) (5)

EN 1990 Eurocode Basis of Structural Design C 33-01-2003 M. 2006NiP 2.06.01-86 M.1987

Hydraulic Structures - General Regulation

Hydraulic Structures - General Regulation

(compiled in TCXD VN 285:2002)

EN 1991 Eurocode 1 Actions on structures 2.01.07-85* M. 1989 2.06.04-82* M. 1989

Loads and Actions on StructuresLoads and Actions on Hydraulic Structures

EN 1992 Eurocode 2 Design of concrete structures 2.02.02-85* M. 2004 Design of Hydraulic structure Foundations

EN 1993 Eurocode 3 Design of steel structures . 2.02.01-83* M. 1995 Design of Building & Structure Foundations

EN 1994 Eurocode 4 Design of composite steel and

concrete structures

2.03.01-84* M. 1988 Design of concrete and reinforced ConcreteStructures

EN 1995 Eurocode 5 Design of timber structures 2.06.05-84* M. 1990 Design of Earth Dams

EN 1996 Eurocode 6 Design of masonry structures 2.06.09-84 M. 1985 Design of Hydraulic Tunnels

EN 1997 Eurocode 7

Part 1.

Part 2

Geotechnical design

General rule

Ground investigation & testing

2.06.07-87 M. 1988 Design of Retaining Walls, Lock, Fish LeaderLine and Protection

EN 1998 Eurocode 8 Design of structures forearthquake resistance

II 7 81* M. 1997 Construction in the seism zones

EN 1999 Eurocode 9 Design of aluminium structures 2.02.03-85 M. 1995 Design of Pile Foundations

3.07.01-85 M. 1985 Design of Hydraulic structure Foundation inRiver

Comparision between two Norm systems


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Notes .1.Column 4 - Using Russian origin; Column 5 - Translating inEnglish;

2.Arranging the name in rows not by same topic, except row 1

and 2;3.Eurocode System approaching according to material, while

Russian System approaching according to structure that is more logical

because interaction between different parts of structure and between

structures and soil/rock mass can be considered, that must be evaluated inthe calculation of foundation and structure according to limite state

method.

4.In Eurocode System, all geotechnical problems are presented

in Eurocode 7, consisting of Geotechnical data, Supervision ofconstruction, monitoring and maintenance. Fill, dewatering, Ground

improvement and reinforcement, Spread foundations, Pile foundations,

Anchorages, Retaining structures, Hydraulic failure, Overall stability and

Embankments. All of them are designed according to limit state.


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Establish physical

model & Interactions

Establish math.

model

Solving: Numerical

method & Computer

Quantify physical

processes &

Interactions

Establish quantified

Equation of System

Theorical simulation of

physical process &

interactions

Application for new design and/or safe management ofexisting structure system. A tool for numerical model study


Comparison - Correction

Steps in Model Development

Reference. EUROCODE 7 - Part 1 2.4. Geotechnical by calculation


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Lee Barbour and JohnLee Barbour and John KrahnKrahnJuly 2003July 2003 -- EnglandEngland

Modeling

Illustration

Observe(Conceptual

Model)

Measure

(TheoreticalModel)

National Research Council (1990)National Research Council (1990)National Research Council (1990)

REFERENCE


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Lee Barbour and JohnLee Barbour and John KrahnKrahnJuly 2003July 2003 -- EnglandEngland

ModelingIllustration

Verify(Interpretative

Model)

Explain(Numerical

Model)


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5. Conclusions


1. Plaxis set is one of the good geotechnical software and

widely adopted in Vietnam. User-Friendliness and quality, full couplewith PlaxFlow and Dynamics, it can analyse a large range of

geotechnical problems, with different soil-rock models, so it is

favourable to model different practical structure - foundation systems.So it can be quite used in calculating structure and foundation

according to limit state;

2. Plaxis softwares provides a useful tool for students and

engineers in approaching geotechnical problems according to advance

methodology (Burland triangle), so it makes more convenient for

engineer to get a suitable design in technique and economy;


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5. Conclusions


3. Selection of input data keep very important in using Plaxis which

decides accuracy of analyzing results. Therefore, users should be

improve skills according to four knowledge blocks said above and

refer to some instructions in two standards system of Eurocode

System and Russian System in order to quickly access necessary

experiences in actively using these Plaxis softwares;

4. People using Plaxis should access official web of the producer for

receiving support, seeing movie and use internal web to exchange

experiences as usual.5. Many thanks to Dr R.B.J Brinkgreve and P.J.W Brand in Plaxis

BV, first people I had relation, William WL Cheang and all friends

in Plaxis BV and AsiaPac for your kind supports.



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Plaxis AsiaPac Pte Ltd - daughter company of Plaxis bv - SingaporeSince the 1st of March 2011 the Plaxis Asia office in Singapore has been renamed

into Plaxis AsiaPac Pte Ltd. To strengthen the activities already being carried

out under the name of Plaxis Asia, the office has been registered as a legal entity

and a 100% daughter company of Plaxis bv.

At the same time the Plaxis AsiaPac team will expand with new staff. Besides ourexisting colleagues at Plaxis AsiaPac, Eddy Tan and William Cheang, we will be

joined firstly by Xing Cheng Lin from March 1st and followed by more new

staff towards the summer


Documents

Review on the Current Development and Application of Plaxis in Vietnam_Prof Nguyen Cong Man_2012_ppt.pdf