logiciel foxta v3 - geodeltia · 1 foxta v3 logiciel foxta v3 foundations design: shallow...

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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

F. 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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User InterfaceUser Interface



Global structure

INPUT (Data) OUTPUT (Results)

Graphicaldisplay

Calculationmodules

Calculationdata

Wizards Wizards

Numericalresults

Graphicalresults


Fully new user-interface. Highly user-friendly.

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Overview of the user-interface (INPUT)

Graphical zone

Buttons

Graphical zone (dynamic)

Data input

Tabs = modeling steps


ButtonsWizards


Graphical display of the results (curves)

Overview of the user-interface (OUTPUT)


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Overview of the user-interface (OUTPUT)Graphical display of the results (scatter plots)



Overview of the user-interface (OUTPUT)Graphical display of the results (3D view)


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Numerical display of the results (fomated file or table)

Overview of the user-interface (OUTPUT)



Overview of the user-interface (OUTPUT)Numerical display of the results (export to Microsoft Excel®)


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CalculationCalculation modulesmodules



Calculation modules

8 calculation modules: standalone / interacting

GROUPIE

TASSELDO FONDSUP

TASPLAQ

FOXTA v3

standalone / interacting


PIECOEF+TASPIE+

TASNEG

FONDPROF

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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)



TASPLAQ ModuleTASPLAQ Module


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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


Mu

ltila

yere

d


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


Sol supportSupporting soil

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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



TASSELDO ModuleTASSELDO Module


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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


Ability to adjust an average settlements plane (least squares method)


Capabilities

Numerous wizards to create sets of loads and calculation points

TASSELDO: Settlements and stresses in a multilayered soil


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Results: profiles of settlements and stresses (as a function of depth)




Results: Settlements at a given depth (scattered plots)



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TASPIE+ ModuleTASPIE+ Module



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


« Frank & Zhao » type of behaviour « Monnet » type of behaviour

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Single pile: results

TASPIE+: single pile or pile group / axial loading



Single pile: results


Loading curve at pile head Q = f(y)


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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


τ

2 types of boundary conditions: imposed displacements (case of a pavement over stiff inclusions) or imposed stresses (case of an embankment over inclusions)

+


yp‐ys

Loi de frottement latéral

+

Cellule élémentaire Domaine « pieu » Domaine « sol »

= +

Elementary cell Pile domain Soil domain

Skin friction law


TASPIE+: pieu isolé ou en groupe sous chargement axial Pile+associated soil column: results


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PIECOEF+ ModulePIECOEF+ Module



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)


Es1 (1er palier)

p1

p2

déplacement relatify - g

Es2 (2e palier)

(3 palier)

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Basic results

Displacements, reactions and forces (T, M)

PIECOEF+: refined calculation of a pile under lateral loading



Basic results

Displacements, reactions and forces (T, M) for each load case

Stiffness matrix at pile head


0

0

32

21 .M

T

w

y

M

Theadhead


Data for Groupie

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Additional results: buckling

Direct and accurate evaluation of the critical buckling load

Calculation of 2nd order forces and displacements

F



F


GROUPIE ModuleGROUPIE Module


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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)


Full loading torques (6 components)defined at the footing center


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


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TASNEG ModuleTASNEG Module



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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Results




Results



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FONDSUP/FONDPROF ModulesFONDSUP/FONDPROF Modules



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


Traitement par point de mesures

Traitement par couchesProcessing measure points Processing layer values

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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


Results: bearing capacity as a function ofdepth


Application Application examplesexamples


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Industrial pavement (Tasplaq)



Industrial pavement on reinforced soil (Taspie+/Tasplaq)

Dallage 25 cmCouche de forme

90 kN 180 kN

Remblai sableux

Sables argileux

Platines

~2,7 m


Sable compact

Maille de 2,7 x 2,7 m²

IR - D=27 cm~2,7 m

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Girder (Tasplaq)



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


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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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


~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)


Foundations for a high-rise building (Tasplaq/Tasseldo)


TASSELDO: help for the selection of the deformation modulus

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Piles submitted to lateral earth pressures (Piecoef+)


Piecoef+: accounting for soil imposed (« free ») displacement g(z)


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


Calcaire sain

Calcaire altéré

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22

20.7

20.54

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Interaction between several tanks (Tasseldo/Tasplaq)



Interaction between several tanks (Tasseldo/Tasplaq)


logiciel foxta v3 - geodeltia · 1 foxta v3 logiciel foxta v3 foundations design: shallow...

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