PLINT PLINTH H ANAL ANALYS YSIS IS
Design Loading
Tank Size= 12’ x 8’ x 4’ Equivalent to
= 3.6576m x 2.4384m x 1.2192m
Full tank a!ait" o# $ate% in volume& m 3
= 1'.8737m3
(en)it" o# $ate%
= 1'''k*+m3
,ei*-t o# $ate% in k*
= 1'873.7k*
,ei*-t o# $ate% in
= 1'667'.7 / 1'6.67'7k
0%o)) Setional %ea o# t-e tank
= 8.9187m 2
oain* !e% a%ea
= 11.96'4k+m2
%ea o# Ea- lint-
= 13’ x 1' = 3.9624m x '.254m = 1.''64m2
ni#o%ml" (i)t%iute oa o# Ea- linten*t- o# lint-
= oain* !e% %ea+no. o# lint- x
= 11.96'4k+m2 +3 x 3.9624m = 15.7973k+m a! et$een Ea- lint-
= 4’ / 1.2192m
Shear Force Diagram (Force Exerted on Each Plinth Exclusive Sel!"eight o "ater Tan#$ 15.7973k+m
3.9624m
Shear Force Diagram (Force Exerted on Each Plinth Inclusive Sel!"eight o "ater Tan#$ 15.7973k+m
3.9624m ))umin* Sel# ,ei*-t o# Tank i) equivalent to 25'k* :oain* !e% a%ea = '.275k+m2; ni#o%ml" (i)t%iute oa o# Ea- lint- :%e)i)tin* t-e loa o# t-e $ate% tank )el#< $ei*-t; = '.3632k+m
Total Design Load
% &')*)+#N,m - .+/+0#N,m % &/&/.'#N,m
Sla1 Anal2sis o the Particular Plinth Sitting
3ode o Practice DL LL 4S5&&.6&*5' &7. &/. Data o Sla1 8ar# 6
cu 0'
2 75'
cover 0.
FS&
oation < 1+ < 1+ < 2+ < 2+ (imen)ion)& > ? T-ikne))&T-k @m!o)eiveoa&@ @m!o)e(eaoa&@( 5''' mm 5''' mm 2'' mm 2.5' k+mA2
2.'' k+mA2
Total(eaoa = Sel#,ei*-t B @m!o)e(eaoa = T-kC0on%ete(en)it"+1''' B @( = 2''C 24+1''' B 2.'' = 6.8' Total #ato%e loa& ,u =1.4'C 6.8' B1.6'C 2.5' = 13.52 k+mA2 Fato%e )!an moment D ea% oment<>& %ea %equi%e D ea% oment
Fato%e Su!!o%t e*e moment E*e no. oment
%ea %equi%e a% !%ovie
<'.78
3''
0 7
<'.51
3''
0 7
<'.67
3''
0 7
<'.33
3''
0 7
DEFLE3TI9N 3HE3: 3AL3;LATI9N F<98 FINITE ELE8ENT ANALYSIS6 Equivalent )!an len*t- a))umin* all e*e) a%e )u!!o%te& l = 5''' mm aximum )!an eGetion = 17 mm at x = 25'' mm D " = 2425 mm aximum )!an ><oment = 39.46 km at x = 25'' mm D " = 225' mm aximum )!an ?<oment = 37.51 km at x = 25'' mm D " = 26'' mm
THE F9LL9"IN= 3AL3;LATI9N IS 4ASED 9N ASS;8PTI9N 9F ANY S;PP9
& 5''' ( ottom o# ottom:; %ea% i) )!annin* ?<i%etion So eIetive e!t-& = T-ikne)) < ove% < ?ea%+2 = 2''<2'<1'+2 = 175.' mm S!an+e!t-J) %atio& % = l+ = 5'''+175.' = 28.6 a)i S!an+e!t-J) %atio& % = 2'.' = 5#")&%eq +:8)&!%ov;
= 5C485C532+:8C628; = 256.9
= 12'C: '.9 B +:CA2; ; = 12'C:'.9B39.46C1'''+:175.'C175.';= 262.6 oiKation Fato%& F = '.55 B :477 < ;+ = '.55B:477<256.9;+262.6 = 1.39 Sla eGetion %atio = FC%+% = 1.39C2'.'+28.57 = '.97 %ea a#te% eGetion -ek = 655 = 5#")&%eq +:8)&!%ov;
= 5C485C532+:8C655; = 246.3
oiKation Fato%& F = '.55 B :477 < ;+ = '.55B:477<246.3;+262.6 = 1.43 Sla eGetion %atio = FC%+% = 1.43C2'.'+28.57 = 1.''
De>ection governs the design? consider o@tion to increase de@th ection chec# PASSED
