tftg1 1.0 mtftg2 0.5 mdsoil 1.0 m (depth of soil)

Lftg 2.2 m (latudinal dimension)

Wftg 2.2 m (longitudinal dimension)

aw 0.63m (pedestal short dimension)

aL 0.63m (pedestal long dimension)

30 (soil angle of friction)

Mload 85.15kN m conc 24kN

m3

Hload 0.46 kNVload1 28.27 kN soil 19

kN

m3

Vload2 25.32kN

OVERTURNING MOMENT, MO

MO Mload Hload tftg1 tftg2 MO 85.84 kN m

RESISTING MOMENT, MR

Wtftg conc Lftg Wftg tftg2 aw aL tftg1 Wtftg 67.606 kN

MR Vload1 Wtftg soil Wftg Lftg aw aL dsoil Wftg2MR 136.13 kN m

OVERTUNING MOMENT FACTOR OF SAFETY, FOSOT

FOSOTMRMO

1.586 > 1.5; OK

SLIDING FORCE, HSL

soil 31.5 (angle of internal friction)

soil tan soil 0.613 (soil coefficient)HSL Hload 0.46 kN (craine sliding force)

SLIDING RESISING FORCE, HRF

HRF Vload1 Wtftg soil (sliding resisting force)HRF 24.105 kN

SLIDING FACTOR OF SAFETY, FOSSL

FOSSLHRFHSL

52.402 ; OK

SOIL BEARING

soil1Vload1 Wtftg soil Wftg Lftg aw aL dsoil

Lftg WftgMO

Wftg2

Lftg Wftg3

12

soil2Vload1 Wtftg soil Wftg Lftg aw aL dsoil

Lftg WftgMO

Wftg2

Lftg Wftg3

12

soil1 73.939 kPa

soil2 22.801 kPa ;Negative soil pressure is rejected. Use another approach

ECCENTRICITY OF VERTICAL FORCE

eOMO

Vload1 Wtftg soil Wftg Lftg aw aL dsoileO 0.694 m

rWftg2

eO

r 0.406 m

SOIL BEARING

f 2( )Vload1 Wtftg soil Wftg Lftg aw aL dsoil

3r Lftg

f 92.284 kPa < 200 KPa; OK

PUNCHING

dbar 16 mmcon 0.65d tftg2 75 mm dbar2 0.417 mfc 23 MPa

Bo aw 2 aL 2d28

min aL aw max aL aw

1Bo 4.188 m 1s 40Vult1 39.58 kN Vult2 35.45 kN

Shear 1.2 conc aw aL tftg1 Vult2Shear 46.881 kNfcmax min fc 70 MPa( ) 23 MPa ACI 318M-08 Sec.11.1.2

Vc1 0.17 12

fcMPa

MPa Bo d ACI 318M-08 Sec.11.11.2.1 Eq. 11-31

Vc1 4271.465 kN

Vc2 0.083s dBo

2

fcMPa

MPa Bo d ACI 318M-08 Sec.11.11.2.1 Eq. 11-32

Vc2 4159.008 kN

Vc3 0.33 fc

MPa MPa Bo d ACI 318M-08 Sec.11.11.2.1 Eq. 11-33

Vc3 2763.889 kNVc con min Vc1 Vc2 Vc3 1796.528 kN > Shear 46.881 kN ;OKONEWAY SHEAR

Shear 46.881 kN

Vsc con 0.17 fc

MPa MPa min Lftg Wftg d

Vsc 486.166 kN > Shear 46.881 kN ;OK

BENDING REINFORCEMENT

xwWftg aw

2

xw 0.785 m

SOIL STRESS AT PEDESTAL EDGE

fxf xw3 r

fx 59.423 kPa

FOOTING MOMENT

Mftg 1.6 Lftg fxxw

2

2 f fx xw

2

3

Mftg 88.207 kN m