review on the current development and application of plaxis in vietnam_prof nguyen cong...
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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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1. Generality on the short courses of Plaxis BV in Vietnam
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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1. Generality on the short courses of Plaxis BV in Vietnam
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1. Generality on the short courses of Plaxis BV in Vietnam
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1. Generality on the short courses of Plaxis BV in Vietnam
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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PLAXIS IN GEOTECHNICAL ENGINEERING
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 IN GEOTECHNICAL ENGINEERING
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
PLAXIS IN GEOTECHNICAL ENGINEERING
-50
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-40
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-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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PLAXIS IN GEOTECHNICAL ENGINEERING
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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PLAXIS IN GEOTECHNICAL ENGINEERING
Examples of application of Plaxis for education and production
- Practical work
After repairing using Plaxis
to design
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PLAXIS IN GEOTECHNICAL ENGINEERING
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.
3. Overview of current finite element programs of Plaxis
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Development Time-line
Plaxis BV Company is officially formed in 1993.
3. Overview of current finite element programs of Plaxis
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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PLAXIS IN GEOTECHNICAL ENGINEERING
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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3. Overview of current finite element programs of Plaxis
PLAXIS IN GEOTECHNICAL ENGINEERING
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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3. Overview of current finite element programs of Plaxis
PLAXIS IN GEOTECHNICAL ENGINEERING
- 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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PLAXIS IN GEOTECHNICAL ENGINEERING
Some examples
3. Overview of current finite element programs of Plaxis
Plaxis 2D
Plaxis 2D
Integrated
-PlaxFlow
-Dynamics
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Deformed mesh
PLAXIS IN GEOTECHNICAL ENGINEERING
Some examples
3. Overview of current finite element programs of Plaxis
Plaxis 3D Tunnel
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New Austrian Tunneling
Method (NATM)
PLAXIS IN GEOTECHNICAL ENGINEERING
Some examples
3. Overview of current finite element programs of Plaxis
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PLAXIS IN GEOTECHNICAL ENGINEERING
Plaxis 3D Foundation
Some examples
3. Overview of current finite element programs of Plaxis
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PLAXIS IN GEOTECHNICAL ENGINEERING
Some examples
3. Overview of current finite element programs of Plaxis
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PLAXIS IN GEOTECHNICAL ENGINEERING
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
PLAXIS IN GEOTECHNICAL ENGINEERING
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
PLAXIS IN GEOTECHNICAL ENGINEERING
Structure
Systems
Response
Water SoilRock
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PLAXIS IN GEOTECHNICAL ENGINEERING
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
PLAXIS IN GEOTECHNICAL ENGINEERING
Reference
EUROCODE 7 - Part 2
Exact input is very important
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PLAXIS IN GEOTECHNICAL ENGINEERING
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
PLAXIS IN GEOTECHNICAL ENGINEERING
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
PLAXIS IN GEOTECHNICAL ENGINEERING
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
PLAXIS IN GEOTECHNICAL ENGINEERING
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
PLAXIS IN GEOTECHNICAL ENGINEERING