Seismic Zone Factor Seismic Zone Factor, ZZ 0.4 Seismic Map Zone FactorOthers 5 1 0.075Soil Profile Coefficient 2A 0.15S 2 2B 0.2Others 0 3 0.3Importance Factor 4 0.4I 1.5 Others 5

(Table 4(a) ACI 350.3)Response Modification FactorRwi 4 Soil Profile Coefficient, SRwc 1 Soil Type Coeff

A 1B 1.2C 1.5D 2Others 0(Table 4(b) ACI 350.3)

Importance Factor, I

1.5

1.25

All other tanks 1(Table 4(c) ACI 350.3)

Response Modification Factor, Rw

Type of Structure

(a) Anchored, flexible-base tanks(b) Fixed- or hinged-base tanks

(d) Elevated Tanks(Table 4(d) ACI 350.3)

Tanks containing hazardous materials

Tanks that are intended to remain

usable for emergency purposes after an

earthquake, or tanks that are part of lifeline systems

(c) Unanchored, contained, or uncontained tanks

1.51.25

1

Response Modification Factor, Rw

Type of StructureRwi

RwcAbove grade Buried

(a) Anchored, flexible-base tanks 4.5 4.5 1(b) Fixed- or hinged-base tanks 2.75 4 1

2 2.75 1

(d) Elevated Tanks 3 - 1

(c) Unanchored, contained, or uncontained

fig.1 - tank plan & section

DATALw 1.25 m 45.10 kNL 0.80 m 6.37 kNB 1.30 mLr 1.25 m

1.50 m 0.892

1.12 m

0.25 m 46.61 kN

0.12 m 11.50 kN

0.25 m

23.58

9.8111.4 kN

f'c 21 Mpa

21538.1 Mpa

10.2 kN2.2 kN

HW

HL

tw

tr

tf

ρc kN/m3

ρL kN/m3

Ec

EQ

8.84

3.910.49 m0.870.67 m0.75 m

281280.17

12.75

148.52 rad/s

λ 5.567

6.224 rad/s

0.042 s

1.010 s

I 1.5S 2

1.375

1.375

kN-s2/m4

kN-s2/m4

kN/m2

kN-s2/m4

ωi

ωc

Ti

Tc

Ci

Cc

1

Z 0.4

4

1

16.60 kN4.23 kN2.63 kN4.19 kN3.55 kN

23.69 kN

y 0 m2.82 kN/m2.62 kN/m

Cv

Rwi

Rwc

-1.07 kN/m6.24 kN/m

10.98720.2

2.19744

2.17

2.02

-0.82

kN/m2

kN/m2

kN/m2

kN/m2

kN/m2

0.75 m1.56 m0.49 m0.87 m0.50 m0.88 m

12.45 kN-m

4.10 kN-m

2.03 kN-m

3.10 kN-m

2.11 kN-m

3.12 kN-m

18.84 kN-m

18.92 kN-m

SEISMIC FORCES TO BE APPLIED IN THE DIRECTION OF THE SEISMIC FORCELEADING HALF @ y= 0 m & TRAILLING HALF @ y 0 m

2.17

/2 1.01

/2 -0.41

2.20 <-----lateral hydrodynamic force

Mw

Mr

Mi

Mc

Mi'

Mc'

Mb

Mo

kN/m2 dmax

kN/m2

kN/m2

kN/m2

0.66 m