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RECTANGULAR OVERHEAD WATER TANKS [ACNPUT PARAMETERS
9.810
25 24.500
Design depth of water tank = 3.250
6.100
6.1000.250
3.550
apacity of !erhead "ater tank = 120.000
2.49#
1.000
1.##5
1.219
11##.200
6#0.221
2.216
#.860
1.3#6
0.09##
%p&'si!e (i%e period is gi!en )y* = 56.369
pectra' ,%p'i-cation actor/period dependent for i%p&'si!e
co%ponent of horionta' %otion
0.085
3
(ype D
1.00
(ype D
3
1
nit weight of +tored 'i&id =i.e. "ater
w
nit wt. of Concrete c=i.e.
HL
nside c'ear 'ength of ect. (ank perpendic&'ar to 7 dir. B
=
nside c'ear 'ength of ect. (ank para'e'' to 7 dir. L ="a''
thickness of !erhead "ater tanks t
w=
nner C'ear "a'' height of !erhead "ater tank = Hw
ass density of Concrete !
"#=
ass density of stored 'i&id L!
w"#=
eight fro% )ase of wa'' to the C: of the tank +he'' $w=
t. a)o!e )ase of wa'' to the C: of i%p&'si!e 'atera' force
hi=
%p. ass of +tored 'i&id per &nit width of ect. (ank wa''
%&= ;"
i
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0.000 % fro% )ase = 31.883
0.323 % fro% )ase = 28.#140.646 % fro% )ase = 25.545
0.969 % fro% )ase = 22.3##
1.292 % fro% )ase = 19.208
1.615 % fro% )ase = 16.039
1.938 % fro% )ase = 12.8#1
2.261 % fro% )ase = 9.#02
2.584 % fro% )ase = 6.533
2.90# % fro% )ase = 3.3653.25 % fro% )ase = 0.000
F1.##5 % fro% )ase = 1.615
= 0.#16
.) CALCULATION O* H+DROSTATIC PRESSURE ,$-
ON WALSL O* TANK
ydrostatic press&re Ehy
F ht.=
ydrostatic press&re Ehy
F ht.=
ydrostatic press&re Ehy
F ht.=
ydrostatic press&re Ehy
F ht.=
ydrostatic press&re Ehy
F ht.=
ydrostatic press&re Ehy
F ht.=
ydrostatic press&re Ehy
F ht.=
ydrostatic press&re Ehy
F ht.=
ydrostatic press&re Ehy
F ht.=
ydrostatic press&re Ehy
F ht.=
ydrostatic press&re Ehy
F ht.=
.) CALCULATION O* INERTIAL PRESSURE /w-
ON WALLS O* TANK
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%p&'si!e orce is gi!en )y the 7>pression = = 11.39#
he $%p'&si!e press&re on the wa''s is gi!en )y the
fo''owing e>pression
%p&'si!e Eress&re on wa''s F 0.000 % fro% )ase =
3.068
%p&'si!e Eress&re on wa''s F 0.323 % fro% )ase =
2.80#
%p&'si!e Eress&re on wa''s F 0.646 % fro% )ase =
2.546
%p&'si!e Eress&re on wa''s F 0.969 % fro% )ase =
2.284
%p&'si!e Eress&re on wa''s F 1.292 % fro% )ase =
2.023
%p&'si!e Eress&re on wa''s F 1.615 % fro% )ase =
1.#62
%p&'si!e Eress&re on wa''s F 1.938 % fro% )ase =
1.500%p&'si!e Eress&re on wa''s F 2.261 % fro% )ase =
1.239
%p&'si!e Eress&re on wa''s F 2.584 % fro% )ase =
0.9##
%p&'si!e Eress&re on wa''s F 2.90# % fro% )ase =
0.#16
%p&'si!e Eress&re on wa''s F 3.25 % fro% )ase =
0.438
.) CALCULATION O* IMPULSIVE PRESSURE /&-ON WALLS O* TANK
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on!ecti!e orce is gi!en )y the 7>pression = = 231.904
= 536.1#2
on!ecti!e (i%e period is gi!en )y the e>pn = 2.885
"here = 5.3#9
pectra' ,%p'i-cation actor/period dependent for i%p&'si!e
co%ponent of horionta' %otion
= 0.#21
= 1.924
he $%p'&si!e press&re on the wa''s is gi!en )y the
fo''owing e>pression
%p&'si!e Eress&re on wa''s F 0.000 % fro% )ase =
15.965
%p&'si!e Eress&re on wa''s F 0.323 % fro% )ase =
19.883
%p&'si!e Eress&re on wa''s F 0.646 % fro% )ase =
23.801
%p&'si!e Eress&re on wa''s F 0.969 % fro% )ase =
2#.#20
%p&'si!e Eress&re on wa''s F 1.292 % fro% )ase =
31.638
%p&'si!e Eress&re on wa''s F 1.615 % fro% )ase =
35.556
%p&'si!e Eress&re on wa''s F 1.938 % fro% )ase =
39.4#4
%p&'si!e Eress&re on wa''s F 2.261 % fro% )ase =
43.393
%p&'si!e Eress&re on wa''s F 2.584 % fro% )ase =
4#.311
%p&'si!e Eress&re on wa''s F 2.90# % fro% )ase =
51.229
%p&'si!e Eress&re on wa''s F 3.25 % fro% )ase =
55.390
.) CALCULATION O* CONVECTIVE PRESSURE /-
ON WALLS O* TANK
&i!a'ent %ass of Con!ecti!e co%p. of stored 'i&id Wis
gi!en )y fo''owing e>pression
or Con!ecti!e (i%e period G 2.4 +ec
eight a)o!e the )ase of wa'' to C: of Con!ecti!e 'atera' orce
$is gi!en )y
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360.3]
%
%
%%
%
%
%
5.644
HI
HI
f water
HI
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HI
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HI
HI
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HI
HI
ec
f water
%
HI
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