Temelj - Spread Footing

Company NameProject Author

Project NameProject Part

1[Geo 5 - Spread footing | version 5.1.7.0 | hardware key 4001 / 1 | FINE TESTTT | Copyright (c) FINE Ltd. 1990-2005 | www.fine.cz]

Spread footing verification

Input dataProjectDate : 2.11.2005

Basic soil parametres

No. Name Patternϕef

[°]cef

[kPa]γ

[kN/m3]γsu

[kN/m3]δ

[°]

1

2

Silty sand

Sandstone

31.50

45.00

0.00

100.00

17.50

22.00

7.50

12.00

0.00

0.00

Soil parametres to compute pressure at rest

No. Name Pattern Typecalculation

ϕ[°]

ν[-]

OCR[-]

Kr

[-]

1

2

Silty sand

Sandstone

cohesive

cohesive

-

-

0.30

0.20

-

-

-

-

Soil parametersSilty sandUnit weight :Angle of intern. friction :Cohesion of soil :Deformation modulus :Poisson's ratio :Coeff. of structural strength :Saturated unit weight :

gjefcefEdef

nmgsat

=======

17,5031,500,00

21,000,300,30

17,50

kN/m3

°kPaMPa

kN/m3

SandstoneUnit weight :Angle of intern. friction :Cohesion of soil :Deformation modulus :Poisson's ratio :Coeff. of structural strength :Saturated unit weight :

gjefcefEdef

nmgsat

=======

22,0045,00

100,001000,00

0,200,30

22,00

kN/m3

°kPaMPa

kN/m3

FoundationFoundation type: centric spread footingDepth from ground surfaceDepth of footing bottomFoundation thicknessIncl. of finished gradeIncl. of footing bottom

hzdts1s2

=====

2.001.200.400.000.00

mmm°°

Unit weight of soil above foundation = 20.00 kN/m3

Geometry of structureFoundation type: centric spread footing




Spread footing lengthSpread footing widthColumn width in the direction of xColumn width in the direction of ySpread footing volume

xycxcy

=====

1.501.500.400.400.90

mmmmm3

Name : Geometry Stage : 1

+x

+y

1.50

1.50

0.550 0.40 0.550

0.550

0.40

0.550

Material of structureUnit weight g = 23.00 kN/m3

Analysis of concrete structures carried out according to the standard CSN 73 1201 R.

Concrete : Concrete B 20Compressive strengthTensile strengthElastic modulus

RbdRbtdEb

===

11.500.90

27000.00

MPaMPaMPa

Longitudinal steel : Reinf.bars 10 216 ETensile strengthCompressive strengthElastic modulus

RsdRscdEs

===

190.00190.00

210000.00

MPaMPaMPa

Transverse steel: Reinf.bars 10 216 ETensile strengthCompressive strengthElastic modulus

RsdRscdEs

===

190.00190.00

210000.00

MPaMPaMPa

Geological profile and assigned soils

No. Layer[m] Assigned soil Pattern

1

2

7.00

-

Silty sand

Sandstone




Load

No. Loadnew change

Name Type N[kN]

Mx

[kNm]My

[kNm]Hx

[kN]Hy

[kN]1234

YESYESYESYES

Zatížení číslo: 1Zatížení číslo: 2Zatížení číslo: 3Zatížení číslo: 4

DesignDesignServiceService

910.00820.00700.00700.00

-2.000.000.00

100.00

70.00-100.00

0.000.00

14.000.00

100.000.00

5.000.000.000.00

Surface surcharges in the vicinity of footing

No. Surchargenew change

Namexs

[m]ys

[m]x

[m]y

[m]q

[kPa]α[°]

h[m]

1 YES Surcharge No. 1 3.00 0.00 2.00 2.00 0.00 15.00 0.00

Ground water tableThe ground water table is at a depth of 4.00 m from the original terrain.

Analysis settingsType of analysis - Analysis for drained conditionsAnalysis of vertical bearing capacity - CSN 73 1001Analysis of settlement - Analysis using oedometric modulus (CSN 73 1001)Bounding of influence zone - based on structural strengthSoil parameteres are reduced according to CSN 73 1001.

Verification No. 1Analysis carried out with an automatic selection of the most unfavorable load cases. Computed weight of spread footingComputed weight of overburden

GZ

==

22.7743.47

kNkN

Vertical bearing capacity checkParameters of slip surface below foundation: Depth of slip surfaceLength of slip surface

zsplsp

==

2.517.77

mm

Design bearing capacity of found.soilExtereme contact pressure

Rd

s==

520.10475.73

kPakPa

Bearing capacity in the vertical direction is SATISFACTORY

Horizontal bearing capacity checkEarth resistance: at restDesign magnitude of earth resistanceFriction angle foundation-footing bottomCohesion foundation-footing bottom

Spd

ya

===

3.8631.500.00

kN°kPa

Horizontal bearing capacityExtreme horizontal force

RdhH

==

512.0614.87

kNkN

Horizontal bearing capacity is SATISFACTORY

Foundation bearing capacity is SATISFACTORY




Name : Bearing cap. Stage : 1; Analysis : 1

De l

ta =

0.8

7 °

+x

+y

1.50

1.50

1.37

1.50

Verification No. 2Analysis carried out for the load case No. 1. (Zatížení číslo: 1) Computed weight of spread footingComputed weight of overburden

GZ

==

22.7743.47

kNkN

Vertical bearing capacity checkParameters of slip surface below foundation: Depth of slip surfaceLength of slip surface

zsplsp

==

2.517.77

mm

Design bearing capacity of found.soilExtereme contact pressure

Rd

s==

520.10475.73

kPakPa

Bearing capacity in the vertical direction is SATISFACTORY

Horizontal bearing capacity checkEarth resistance: at restDesign magnitude of earth resistanceFriction angle foundation-footing bottomCohesion foundation-footing bottom

Spd

ya

===

3.8631.500.00

kN°kPa




Horizontal bearing capacityExtreme horizontal force

RdhH

==

512.0614.87

kNkN

Horizontal bearing capacity is SATISFACTORY

Foundation bearing capacity is SATISFACTORY

Verification No. 1Settlement and rotation of foundation - input dataAnalysis carried out with an automatic selection of the most unfavorable load cases.Analysis carried out with accounting for coefficient k1 (influence of foundation depth).Stress at the footing bottom considered from the finished grade. Computed weight of spread footingComputed weight of overburden

GZ

==

20.7033.44

kNkN

Settlement of mid point of edge x - 1Settlement of mid point of edge x - 2Settlement of mid point of edge y - 1Settlement of mid point of edge y - 2Settlement of foundation center pointSettlement of characteristic point

======

5.55.56.24.89.66.5

mmmmmmmmmmmm

(1-max.compressed edge; 2-min.compressed edge)

Settlement and rotation of foundation - results

Foundation stiffness:Computed weighted average modulus of deformation Edef = 21.00 MPaFoundation in the longitudinal direction is rigid (k=24.38)Foundation in the direction of width is rigid (k=24.38)

Overall settlement and rotation of foundation:Foundation settlementDepth of influence zone

==

6.52.86

mmm

Rotation in direction of x = 0.961 (tan*1000)Rotation in direction of y = 2.285 (tan*1000)




Name : Settlement Stage : 1; Analysis : 1

OG

FG

2.86

0.40

1.20

2.00

mSigma,orSigma,orSigma,z

Dimensioning No. 1Analysis carried out with an automatic selection of the most unfavorable load cases.

Verification of longitudinal reinforcement of foundation in the direction of xBar diameterNumber of barsReinforcement coverCross-section width

====

22.010.0035.01.50

mm

mmm




Cross-section depth = 0.40 m

Reinforcement ratioPosition of neutral axisUltimate moment

mstxuMu

===

0.630.04

229.87

%mkNm

><>

0.160.19

132.76

%mkNm

===

mst,minxu,limMd

Cross-section is SATISFACTORY.

Verification of longitudinal reinforcement of foundation in the direction of yBar diameterNumber of barsReinforcement coverCross-section widthCross-section depth

=====

22.08.0035.01.500.40

mm

mmmm

Reinforcement ratioPosition of neutral axisUltimate moment

mstxuMu

===

0.510.03

186.20

%mkNm

><>

0.160.19

121.09

%mkNm

===

mst,minxu,limMd

Cross-section is SATISFACTORY.

Spread footing for punching shear failure checkColumn normal forceForce transmitted into found.soilForce transmitted by shear strength of SRC

===

820.00524.80295.20

kNkNkN

Maximum shear forceOutline of critical cross-sectionShear force transmitted by concrete

Qd

Qbu

=

=

136.373.20

194.25

kN/mmkN/m

Qd < Qbu => Reinforcement is not required

Spread footing for punching shear is SATISFACTORY

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Temelj - Spread Footing