Water Tank Design ( Aci 318-05 & 350-01)

Made

Date

AMY

29-Oct-14

1

Check

Date

Rev.

MMA

29-Oct-14

0

Sheet

PROJECT TITLE: PRINCE MAJED PALACE DESIGN OF UNDERGROUND WATER TANK

Material Properties

Geometrical Properties

Weight of reinforced concrete "γrc"

24

kN/m3

Thickness of bottom slab " ts "

400

mm

Weight of soil "γsoil"

18

kN/m3

Thickness of wall " twall "

400

mm

Weight of water "γwater"

10

kN/m3

Hight of tank " h "

4.4

m

Diameter of stirrups

10

mm

Active pressure ' Ka'

Strength of concrete " f 'c "

20

N/mm2

0.2948 1

Strength of steel "fy"

415

N/mm2

Clear cover to concrete

50

mm

Angle of friction "j "

33

Degree

Shrinkage &Temp. Steel Dia

10

mm

Active pressure ' Ka' For Water

Load Surcharge " q "

10

CASE 1 : SOIL

+

Moment

Earth Pressure

Surcharge

1) Negative moment at abase : 𝑲𝒂 × 𝜸𝒔𝒐𝒊𝒍 × 𝒉𝟑 𝑲𝒂 × 𝒒 × 𝒉𝟐 + 𝟏𝟓 𝟖

−

𝑴𝒔𝒆𝒓𝒗𝒊𝒄 =

Multimate = Mservic x 1.6

=37

kN.m

=60

kN.m

2) Negative moment Steel (vertical wall) : Diameter of bar

16

mm

d

=332

𝑹𝒖 =

𝑴𝒖− 𝒃𝒅𝟐

PLEASE CHOOSE DIAMETER OF BAR

mm

=.541

% of seel (ρ)

=.00132

% of seel (ρ) minmum

=.00300

Area of steel = ρ x b x h

=1200

mm

ACI 350-01 section 14.3.2 Minimum ratio of vertical reinforcement area to gross concrete area shall be 0.003 2

=6

Bar's

Area of steel Provided

=1206

mm2

Space Between Two Bar's " S "

=167

mm

Provided " S "

=150

mm

=37

kN.m

No. of bar =( As/Abar)

Use

T16 -150

mm c/c

3)Crack widht check : Mservice dc

=

=58

mm

A= 2x dc x Space

=17400

mm2

FS= (Mu/As x d)

=93

N/mm2

=.10272

mm

W=0.011 x Fs x (dc +A)^1/3/1000

OK

ACI 350-01, R10.6.4 GERGELY LUTZ EXPRSSION

2

kN/m

Made

Date

AMY

29-Oct-14

1

Check

Date

Rev.

MMA

29-Oct-14

0

Sheet

PROJECT TITLE: PRINCE MAJED PALACE DESIGN OF UNDERGROUND WATER TANK

4) Positive moment in R.C wall : 𝑴𝒔𝒆𝒓𝒗𝒊𝒄 + =

𝑲𝒂 × 𝒒 × 𝒉𝟐 × 𝜸𝒔𝒐𝒊𝒍 𝑲𝒂 × 𝜸𝒔𝒐𝒊𝒍 × 𝒉𝟑 + 𝟏𝟔. 𝟔𝟕 𝟏𝟐𝟖

Multimate = Mservic x1.6 5) Positve moment Steel : Diameter of bar

16 d

=35

kN.m

=56

kN.m

mm

PLEASE CHOOSE DIAMETER OF BAR

=342

𝑴− 𝒖 𝑹𝒖 = 𝒃𝒅𝟐

mm

=.481

% of seel (ρ)

=.00117

% of seel (ρ) minmum

=.00300

Area of steel = ρ x b x h

ACI 350-01 section 14.3.2 Minimum ratio of vertical reinforcement area to gross concrete area shall be 0.003

=1200

No. of bar =( As/Abar)

=6 =1200

Area of steel Provided

Space Between Two Bar's " S "

=167

Provided " S "

=150

Use

T16 -150

mm c/c

6) Horizontal moment Steel :

Diameter of bar

12

d Area of steel =0.003x b x h For one face

mm

PLEASE CHOOSE DIAMETER OF BAR

=344

mm

=1200

mm2 2

=600

mm

=5

Bar's

Space Between Two Bar's " S "

=188

mm

Provided " S "

=175

mm

No. of bar =( As/Abar)

ACI 350-01 section 14.3.2 Minimum ratio of horizontal reinforcement area to groos concrete area shall be 0.003

Use

T12 -175

mm c/c

7) Base slab : Diameter of bar

20 d

Area of steel =0.0018x b x h No. of bar =( As/Abar) Provided " S "

mm

PLEASE CHOOSE DIAMETER OF BAR

=340

mm

=720

mm2

=2

Bar's

=436

mm

water pressure on the base slab and weight of the base will directly counteracted by the ground pressure .The pressure of water can be safely resisted by the soil under the floor . Hence : The floor slab or base slab will only requier normal rienforcement ,so as the enable if to span over any possible weak pathes at ground .

Use

T20 -200

mm c/c

Made

Date

AMY

29-Oct-14

1

Check

Date

Rev.

MMA

29-Oct-14

0

Sheet

PROJECT TITLE: PRINCE MAJED PALACE DESIGN OF UNDERGROUND WATER TANK

CASE 2 : WATER 1) Negative moment at abase : 𝑴𝒔𝒆𝒓𝒗𝒊𝒄− =

𝑲𝒂 × 𝜸𝑾𝒂𝒕𝒆𝒓 × 𝒉𝟑 𝟏𝟓

=57

kN.m

2) Negative moment Steel (vertical wall) : Ultimate Moment " Mu" = 1.6 x M service Diameter of bar

=91 16

d

mm

=342

𝑴− 𝒖 𝑹𝒖 = 𝒃𝒅𝟐

kN.m PLEASE CHOOSE DIAMETER OF BAR

mm

=.824

% of seel (ρ)

=.0020

% of seel (ρ) minmum

=.0030

Area of steel = ρ x b x h

=1200

No. of bar =( As/Abar)

mm2

=6

Bars

Area of steel Provided = NO.OF BAR x Area Of Bar

=1200

mm2

Space Between Two Bar's " S "

=167

mm

=150

mm

M service

=57

kN.m

dc

=58

mm

=21854

mm2

FS= (Mu/As x d)

=138

N/mm2

W=0.011 x Fs x (dc +A)^1/3/1000

=.165

mm

=25

kN.m

Provided " S "

ACI 350-01 section 14.3.2 Minimum ratio of vertical reinforcement area to groos concrete area shall be 0.003

Use

T16 -150

mm c/c

3)Crack widht check :

A= 2x dc x Space

ACI 350-01, R10.6.4 GERGELY LUTZ EXPRSSION

OK

4) Positive moment in R.C wall : 𝑴𝒔𝒆𝒓𝒗𝒊𝒄 − =

𝜸𝑾𝒂𝒕𝒆𝒓 × 𝒉𝟑 𝟑𝟑. 𝟓

5) Horizontal moment Steel : Diameter of bar

12

d

mm

PLEASE CHOOSE DIAMETER OF BAR

344

mm

Area of steel (As) minmum

=1200

mm2

For One Face

=600

mm2

No .Of Bar For One face

=5

Bars

Space Between Two Bar's " S "

=188

mm

Provided " S "

=175

mm

ACI 350-01 section 14.3.2 Minimum ratio of horizontal reinforcement area to groos concrete area shall be 0.003

Use

T12 -175

mm c/c

6) Base slab : Diameter of bar

20

mm

d

=340

Area of steel =0.0018x b x h

PLEASE CHOOSE DIAMETER OF BAR mm

=720

mm2

No. of bar =( As/Abar)

=2

Bar's

Area of steel Provided

=436

mm

water pressure on the base slab and weight of the base will directly counteracted by the ground pressure .The pressure of water can be safely resisted by the soil under the floor . Hence : The floor slab or base slab will only requier normal rienforcement ,so as the enable if to span over any possible weak pathes at ground .

Use

T20

-

425 mm c/c

Both 2- WAY

T12 -175 T16 -150

T16 -150

EMPTY WATER

TWO LAYERS OF APPROVED WATER PROOFING MEMBRANE WITH PROTECTION BOARD (TYP)

T20 -200

GRAVEL FILL (1"-6" SIZE) (TYP) 1000mm DEEP

50 THK. BLINDING CONCRETE (TYP)

50 THK. PROTECTION SCREED (TYP)

TWO LAYERS OF APPROVED WATERPROOFING MEMBERANE (TYP)

EMPTY TANK

Water Level

T16 -150

T12 -175

WATER IN SIDE

TWO LAYERS OF APPROVED WATER PROOFING MEMBRANE WITH PROTECTION BOARD (TYP)

T20 -425

GRAVEL FILL (1"-6" SIZE) (TYP) 1000mm DEEP

50 THK. BLINDING CONCRETE (TYP)

50 THK. PROTECTION SCREED (TYP)

TWO LAYERS OF APPROVED WATERPROOFING MEMBERANE (TYP)

HYDRAULIC TEST STAGE