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FOXTA v3
Logiciel Foxta v3 Foundations design:
shallow foundations, deep foundations, piled raft foundations stiff inclusions pile groups etcpiled‐raft foundations, stiff inclusions, pile groups, etc
Page 1F. Cuira – B. SimonV. Bernhardt / F. Cuira
FOXTA v3 Foxta v3 overview
Foxta v3: tool for foundations design
Shallow foundations Deep foundations Piled-raft foundationsstiff inclusions
Pil d ft f d ti• Footings• Embankments• Rafts• Pavements
Bearing capacityS ttl t
• Piles, barrettes• Inclusions, micropiles• Steel profiles• Pile groups
Bearing capacityDi l t
• Piled-raft foundation(flexible or rigid)
• Raft or pavement on stiff inclusions
• Embankment on inclusions
Page 2F. Cuira - August 2012
Settlements Stresses (soil) Forces (T, M) Interaction between
elements
Displacements Stresses in the interface Forces (N, T, M) Distribution of forces
between elements
Displacements Stresses in the interface Forces (N, T, M) Distribution of forces
between elements
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FOXTA v3 Foxta v3 overview
User InterfaceUser Interface
Page 3F. Cuira - August 2012
FOXTA v3 Foxta v3 overview
Global structure
INPUT (Data) OUTPUT (Results)
Graphicaldisplay
Calculationmodules
Calculationdata
Wizards Wizards
Numericalresults
Graphicalresults
Page 4F. Cuira - August 2012
Fully new user-interface. Highly user-friendly.
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FOXTA v3 Foxta v3 overview
Overview of the user-interface (INPUT)
Graphical zone
Buttons
Graphical zone (dynamic)
Data input
Tabs = modeling steps
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ButtonsWizards
FOXTA v3 Foxta v3 overview
Graphical display of the results (curves)
Overview of the user-interface (OUTPUT)
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FOXTA v3 Foxta v3 overview
Overview of the user-interface (OUTPUT)Graphical display of the results (scatter plots)
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FOXTA v3 Foxta v3 overview
Overview of the user-interface (OUTPUT)Graphical display of the results (3D view)
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FOXTA v3 Foxta v3 overview
Numerical display of the results (fomated file or table)
Overview of the user-interface (OUTPUT)
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FOXTA v3 Foxta v3 overview
Overview of the user-interface (OUTPUT)Numerical display of the results (export to Microsoft Excel®)
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FOXTA v3 Foxta v3 overview
CalculationCalculation modulesmodules
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FOXTA v3 Foxta v3 overview
Calculation modules
8 calculation modules: standalone / interacting
GROUPIE
TASSELDO FONDSUP
TASPLAQ
FOXTA v3
standalone / interacting
Page 12F. Cuira - August 2012
PIECOEF+TASPIE+
TASNEG
FONDPROF
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FOXTA v3 Foxta v3 overview
Modules de calcul
3 new modules: TASPLAQ: replaces TASPOUTRE TASPIE+: replaces TASPIEp PIECOEF+: replaces PIECOEF
Extension of existing modules capabilities: No limit for the number of elements (layers, piles, loads, etc)
Page 13F. Cuira - August 2012
FOXTA v3 Foxta v3 overview
TASPLAQ ModuleTASPLAQ Module
Page 14F. Cuira - August 2012
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FOXTA v3 Foxta v3 overview
TASPLAQ: 3D modeling of a raft or pavement Calculation key features (Cuira & Simon, RFG 2008)
Raft or pavement: finite elements (plate type) Supporting soil: Boussinesq model extended to multilayered soils
El t ith 12Elements with 12 degrees of freedom
dso
il
Page 15F. Cuira - August 2012
Mu
ltila
yere
d
FOXTA v3 Foxta v3 overview
Capabilities Raft(s) or pavement(s) maybe be defined with variable inertia and geometry
Any type of vertical load is accepted (point load, linear load, distributed load)
TASPLAQ: 3D modeling of a raft or pavement
Support maybe defined either as an elastic multilayered soil, or as a distribution of heterogeneous springs
Automatic management of detachment and plastification at the interface
Radier/dallage
ChargementLoad
Raft/pavement
Page 16F. Cuira - August 2012
Sol supportSupporting soil
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FOXTA v3 Foxta v3 overview
Implementation: Surface settlements Stresses applied to the soil Forces (Tx, Ty, Mx, My) in the raft or pavement
TASPLAQ: 3D modeling of a raft or pavement
Forces (Tx, Ty, Mx, My) in the raft or pavement
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FOXTA v3 Foxta v3 overview
TASSELDO ModuleTASSELDO Module
Page 18F. Cuira - August 2012
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FOXTA v3 Foxta v3 overview
TASSELDO: Settlements and stresses in a multilayered soil Capabilities
Horizontal multilayered soil with a stress distribution of Boussinesq typeyp
Vertical loads (any shape), applied at groundlevel or at any depth
Settlements calculation at any point using a 3D/1D elastic model or oedometric behaviour
Accounting for (predefined) variation of settlements with time
Sol multicoucheSupporting soil
Page 19F. Cuira - August 2012
Ability to adjust an average settlements plane (least squares method)
FOXTA v3 Foxta v3 overview
Capabilities
Numerous wizards to create sets of loads and calculation points
TASSELDO: Settlements and stresses in a multilayered soil
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FOXTA v3 Foxta v3 overview
Results: profiles of settlements and stresses (as a function of depth)
TASSELDO: Settlements and stresses in a multilayered soil
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FOXTA v3 Foxta v3 overview
Results: Settlements at a given depth (scattered plots)
TASSELDO: Settlements and stresses in a multilayered soil
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FOXTA v3 Foxta v3 overview
TASPIE+ ModuleTASPIE+ Module
Page 23F. Cuira - August 2012
FOXTA v3 Foxta v3 overview
TASPIE+: single pile or pile group / axial loading Single pile: capabilities
Pile with variable section and rigidity submitted to head loading
Lateral skin friction law qs = f(w) defined according to Frank & qs ( ) gZhao, Monnet, or « point by point » curves
Point load qp = f(wp) defined according to Frank & Zhao or « point by point » curves
Page 24F. Cuira - August 2012
« Frank & Zhao » type of behaviour « Monnet » type of behaviour
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FOXTA v3 Foxta v3 overview
Single pile: results
TASPIE+: single pile or pile group / axial loading
Page 25F. Cuira - August 2012
FOXTA v3 Foxta v3 overview
Single pile: results
TASPIE+: single pile or pile group / axial loading
Loading curve at pile head Q = f(y)
Page 26F. Cuira - August 2012
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FOXTA v3 Foxta v3 overview
Pile+associated soil column: capabilities
Elementary cell model (Simon 2009): applicable to pile groups as well as to stiff inclusions systems
2 t f b d diti i d di l t ( f t
TASPIE+: single pile or pile group / axial loading
τ
2 types of boundary conditions: imposed displacements (case of a pavement over stiff inclusions) or imposed stresses (case of an embankment over inclusions)
+
Page 27F. Cuira - August 2012
yp‐ys
Loi de frottement latéral
+
Cellule élémentaire Domaine « pieu » Domaine « sol »
= +
Elementary cell Pile domain Soil domain
Skin friction law
FOXTA v3 Foxta v3 overview
TASPIE+: pieu isolé ou en groupe sous chargement axial Pile+associated soil column: results
Page 28F. Cuira - August 2012
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FOXTA v3 Foxta v3 overview
PIECOEF+ ModulePIECOEF+ Module
Page 29F. Cuira - August 2012
FOXTA v3 Foxta v3 overview
PIECOEF+: refined calculation of a pile under lateral loading Capabilities
Variable pile inertia and geometry
Accounting for shear forces deformations
Accounting for soil plastification (law with 2 or 3 plateaux)
Accounting for imposed « free » soil displacement g(z)
Distributed or point loads applicable to any point along the pile
réaction du sol
(3e palier)
Page 30F. Cuira - August 2012
Es1 (1er palier)
p1
p2
déplacement relatify - g
Es2 (2e palier)
(3 palier)
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FOXTA v3 Foxta v3 overview
Basic results
Displacements, reactions and forces (T, M)
PIECOEF+: refined calculation of a pile under lateral loading
Page 31F. Cuira - August 2012
FOXTA v3 Foxta v3 overview
Basic results
Displacements, reactions and forces (T, M) for each load case
Stiffness matrix at pile head
PIECOEF+: refined calculation of a pile under lateral loading
0
0
32
21 .M
T
w
y
M
Theadhead
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Data for Groupie
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FOXTA v3 Foxta v3 overview
Additional results: buckling
Direct and accurate evaluation of the critical buckling load
Calculation of 2nd order forces and displacements
F
PIECOEF+: refined calculation of a pile under lateral loading
Page 33F. Cuira - August 2012
F
FOXTA v3 Foxta v3 overview
GROUPIE ModuleGROUPIE Module
Page 34F. Cuira - August 2012
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FOXTA v3 Foxta v3 overview
GROUPIE: pile group topped with a rigid footing Capabilities
3D processing of a group of pilesconnected on top with an infinitelyrigid footingg g
Piles may have any inclination in space Ability to group piles with the same
properties into pile « families »
Accounting for piles flexibility throughtheir stiffness matrices at pile head(results from Taspie+/Piecoef+)
Full loading torques (6 components)
Page 35F. Cuira - August 2012
Full loading torques (6 components)defined at the footing center
FOXTA v3 Foxta v3 overview
Results: for each load case
Displacements and rotations of the footing
Forces (N, M, T) at each pile head
GROUPIE: pile group topped with a rigid footing
( , , ) p
Page 36F. Cuira - August 2012
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FOXTA v3 Foxta v3 overview
TASNEG ModuleTASNEG Module
Page 37F. Cuira - August 2012
FOXTA v3 Foxta v3 overview
TASNEG: negative skin friction for a single pile or a pile in a group
Capabilities
Calculation of negative skin friction according to Combarieumodel
A ti f il Accounting for pile groups
Calculation of settlements according to elastic or oedometricbehaviour
Accounting for an imposed additional stress in depth(uniform or variable)
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FOXTA v3 Foxta v3 overview
Results
TASNEG: negative skin friction for a single pile or a pile in a group
Page 39F. Cuira - August 2012
FOXTA v3 Foxta v3 overview
Results
TASNEG: negative skin friction for a single pile or a pile in a group
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FOXTA v3 Foxta v3 overview
FONDSUP/FONDPROF ModulesFONDSUP/FONDPROF Modules
Page 41F. Cuira - August 2012
FOXTA v3 Foxta v3 overview
FONDSUP: design of a shallow foundation according to current French standard
Now (France): calculation of bearing capacityand pressumetric settlement of a single shallowfoundation according to Fascicule 62 standard
Soon (France): compliance with nationalapplication document of EC7 for shallowfoundations
Input data: pressuremetric profile, with valuesdefined per layer or at measure points
Page 42F. Cuira - August 2012
Traitement par point de mesures
Traitement par couchesProcessing measure points Processing layer values
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FOXTA v3 Foxta v3 overview
FONDPROF: design of a deep foundation according to current French standard
Now (France): calculation of bearingcapacity of a pile/micropile according toFascicule 62 / DTU standards
Ql
/
Soon: compliance with national applicationdocument of EC7 for deep foundations
Input data: pressuremetric or CPT profile,with values defined per layer or at measurepoints
Page 43F. Cuira - August 2012
Results: bearing capacity as a function ofdepth
FOXTA v3 Foxta v3 overview
Application Application examplesexamples
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FOXTA v3 Foxta v3 overview
Industrial pavement (Tasplaq)
Page 45F. Cuira - August 2012
FOXTA v3 Foxta v3 overview
Industrial pavement on reinforced soil (Taspie+/Tasplaq)
Dallage 25 cmCouche de forme
90 kN 180 kN
Remblai sableux
Sables argileux
Platines
~2,7 m
Page 46F. Cuira - August 2012
Sable compact
Maille de 2,7 x 2,7 m²
IR - D=27 cm~2,7 m
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FOXTA v3 Foxta v3 overview
Girder (Tasplaq)
Page 47F. Cuira - August 2012
FOXTA v3 Foxta v3 overview
Raft with local loading (Tasplaq)
(E1= 30 MPa, ν1=0.30)
Charge 270 kN Charge 350 kN Radier 30 cmLongrine 80 cm x 30 cm
12,5 m
Page 48F. Cuira - August 2012
22,5 m
E1 = 10 MPa nu1 = 0,33
E2 = 15 MPa nu2 = 0,33
E3 = 30 MPa nu3 = 0,33
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FOXTA v3 Foxta v3 overview
Foundations for a high-rise building (Tasplaq/Tasseldo)
Coupe A
Radier d l
Vue en plan~190 m Radier environnant
de la tour
Radier environnant Radier de la tour
Joint franc
~ 4,5 m
Page 49F. Cuira - August 2012
~50 m
~18 m
~5 m
~6 m
~ 17 m
Sables 1
Argiles 1
Sables 2
Argiles 2
4,5 m
Vue en coupe (A)
FOXTA v3 Foxta v3 overview
Foundations for a high-rise building (Tasplaq/Tasseldo)
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TASSELDO: help for the selection of the deformation modulus
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FOXTA v3 Foxta v3 overview
Piles submitted to lateral earth pressures (Piecoef+)
Page 51F. Cuira - August 2012
Piecoef+: accounting for soil imposed (« free ») displacement g(z)
FOXTA v3 Foxta v3 overview
Micropiles foundations (Piecoef+/Taspie+/Groupie)
1.75m35
34.2
E i b i
Alluvions
modernes13.5°
30
M2
M1
Remblai
My
Tz
Tx
x
z
Ecran anti-bruit
Semelle
Micropieux
Page 52F. Cuira - August 2012
Calcaire sain
Calcaire altéré
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22
20.7
20.54
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FOXTA v3 Foxta v3 overview
Interaction between several tanks (Tasseldo/Tasplaq)
Page 53F. Cuira - August 2012
FOXTA v3 Foxta v3 overview
Interaction between several tanks (Tasseldo/Tasplaq)
Page 54F. Cuira - August 2012