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ASDIP Foundation 2.6.1 SPREAD FOOTING DESIGN www.asdipsoft.com

GEOMETRY

Footing Length (X-dir) .......

Footing Width (Z-dir) .........

Footing Thickness .............

Soil Cover .........................

Column Length (X-dir) ......

Column Width (Z-dir) ........

Offset (X-dir) .....................

Offset (Z-dir) .....................

Pedestal Height ................

2.50

2.00

75.0

0.30

16.0

16.0

0.0

0.0

0.91

m

m

cm

m

cm

cm

cm

cm

m

OK

OK

OK

APPLIED LOADS

Service Factored

Axial Force P ...........

Moment about X Mx

Moment about Z Mz

Shear Force Vx ........

Shear Force Vz ........

-36.0

36.0

0.0

-9.9

0.0

-36.0

36.0

0.0

-9.9

0.0

KN

KN-m

KN-m

KN

KN

SOIL PRESSURES (Comb: Service)

Gross Allow. Soil Pressure ..

Soil Pressure at Corner 1 ....

Soil Pressure at Corner 2 ....

Soil Pressure at Corner 3 ....

Soil Pressure at Corner 4 ....

Bearing Pressure Ratio ..........

Ftg. Area in Contact with Soil ...

X-eccentricity / Ftg. Length .......

Z-eccentricity / Ftg. Width .........

100.00

50.03

0.00

0.00

29.38

0.50

77.6

0.08

0.23

KPa

KPa

KPa

KPa

KPa

%

OK

OK

OK

MATERIALS

Column Concrete f'c ........

Column Dowels fy ............

Column Ties fy .................

Footing Concrete f'c .........

Footing Rebars fy .............

Soil Cover Density ............

32.0

460.0

460.0

32.0

460.0

17278.8

MPa

MPa

MPa

MPa

MPa

KN/m3

OVERTURNING CALCULATIONS (Comb: Service)

OVERTURNING

Force Arm Moment

KN m KN-m- About X-X

Moment Mx ...........

Shear Force Vz ....

Rh = OTM =

- About Z-Z

Moment Mz ...........

Shear Force Vx ....

Rh = OTM =

X-X Z-Z

Arm of Vertical Resultant =

Overturning Safety Factor =

--- --- 36.0

0.0 1.66 0.0

0.0 36.0

--- --- 0.0

-9.9 1.66 -16.4

-9.9 16.4

0.54 1.04 m

1.59 5.02 > 1.5 OK

RESISTING

Force Arm Moment

KN m KN-m- About X-X

Footing Weight ..

Column Weight ..

Soil Cover ..........

Axial Force P .....

Rv = RM =

88.4 1.00 88.4

0.5 1.00 0.5

25.8 1.00 25.8

-36.0 1.00 -36.0

78.7 78.7

- About Z-Z

Footing Weight ..

Column Weight ..

Soil Cover ..........

Axial Force P .....

Rv = RM =

88.4 1.25 110.5

0.5 1.25 0.7

25.8 1.25 32.2

-36.0 1.25 -45.0

78.7 98.4

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ASDIP Foundation 2.6.1 SPREAD FOOTING DESIGN www.asdipsoft.com

SLIDING (Comb. Service)

Footing-Soil Friction Coeff. .....

Friction Force at Base .............

Passive Pressure Coeff. Kp ....

X-X Z-Z

Passive Force @ Ftg ...

Horiz. Resisting Force

Horiz. Sliding Force .....

Sliding Safety Factor ...

0.45

35.4

2.77

48.5

46.3

-9.9

8.47

60.6

49.0

0.0

99.99 > 1.5 OK

KN

KN

KN

KN

UPLIFT CALCS (Comb: Service)

Uplift Force P ....................

Pedestal Selfweight ............

Footing Selfweight ..............

Soil Cover Weight ...............

Downward Force W ...........

Uplift Safety Factor .............

36.0

0.5

88.4

25.8

114.7

3.19

KN

KN

KN

KN

KN

> 1.0 OK

PUNCHING SHEAR (Comb: Factored)

Unbalanced Moment Factor Ɣvx ...

Unbalanced Moment Factor Ɣvz ...

Punching Shear due to Axial ....

Punching Shear due to Mx .......

Punching Shear due to Mz .......

Punching Shear Stress Vu ......

Effective Perimeter bo .............

Average Effective Depth d ......

Column Location Factor αs ....

Column Aspect Ratio β ...........

Punching Shear Strength ϕVc ..

Punching Shear Ratio Vu/ϕVc .....

0.40

0.40

10.0

21.4

9.8

41.1

326.0

65.5

40 (Interior)

1.00

1409.2

0.03

Pa

Pa

Pa

Pa

cm

cm

Pa

OK

2

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ONE-WAY SHEAR (Comb: Factored)

- Side + Side

One-way Shear Vux ...

One-way Shear Vuz ...

Under-strength ϕ Factor .............

One-way Shear Strength ϕVcx

One-way Shear Strength ϕVcz

Max. One-way Shear Ratio Vu/ϕVc ..

-13.7 -0.6

-16.5 8.1

0.75

936.3

1136.9

0.01

KN

KN

KN

KN

OK

OK

OK

LOAD TRANSFER (Comb: Factored)

Bearing Under-strength ϕ Factor .......

Compressive Stress Pu .............

Use 4 #6 x 0.91 m hooked dowels , As = 11.35 cm2

Column Bearing Strength ϕPn ...

Footing Bearing Strength ϕPn ...

Shear Force Transfer Vu ...........

Shear Friction Strength ϕVn ......

Min. Steel Area As = 0.005 A1 ...

Develop. Length Ratio at Column .....

Develop. Length Ratio at Footing .....

0.65

0.0

30.9

48.6

0.0

235.0

1.28

1.20

0.39

MPa

MPa

MPa

KN

KN

cm2

OK

OK

OK

OK

NG

OK

FLEXURE (Comb: Factored)

- Top Bars - - Side + Side

Bending Moment -Mux ...

Bending Moment -Muz ...

X-Bars Development Length Ratio ..

Z-Bars Development Length Ratio ..

Min. Top Steel Area Ratio ...............

Under-strength ϕ Factor ..................

Bending Strength -ϕMnx ........

Bending Strength -ϕMnz ........

Max. Bending Ratio -Mu/ϕMn ...........

-23.2 0.0

-17.1 -2.0

No Top Reinforcement Provided at the Footing

Use Plain Concrete Flexural Strength at Top

N.A.

N.A.

N.A.

0.55

302.8

242.2

0.08

KN-m

KN-m

KN-m

KN-m

OK

OK

OK

- Bottom Bars - - Side + Side

Bending Moment +Mux ...

Bending Moment +Muz ...

X-Bars Development Length Ratio ..

Z-Bars Development Length Ratio ..

Min. Bottom Steel Area Ratio ...........

Under-strength ϕ Factor ..................

Bending Strength +ϕMnx ........

Bending Strength +ϕMnz ........

Max. Bending Ratio +Mu/ϕMn ...........

0.0 8.7

0.0 0.0

Use 12 #6 Bars Parallel to X (Bot) , d = 66.4 cm

Use 12 #6 Bars Parallel to Z (Bot) , d = 64.5 cm

0.40

0.52

OK

OK

OK0.99

0.90

894.0

916.8

0.01

KN-m

KN-m

KN-m

KN-m

OK

OK

OK

3

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ASDIP Foundation 2.6.1 SPREAD FOOTING DESIGN www.asdipsoft.com

DESIGN CODES

Concrete Design ................

Load Combinations ............

ACI 318-08

ASCE 7-10

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