Level: Bachelor Semester – Spring Programme: BE !ourse: "esign o# $!! Structure
Year : 2009 Full Marks: 00 Pass Marks: %& 'ime : (hrs)
Candidates are required to give their answers in their own words as far as practicable. The figures in the margin indicate full marks. Attempt all the questions.
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* rectangular +ea +eam se section is (2 (20 mm mm ,i ,i-e an an- &0 &00 mm mm -ee -eep ,i ,ith &0 &0 mm e##e e##ect ctiv ivee cove coverr) 'he 'he +eam +eam sect sectio ion n is to +e su+. su+.ec ecte te- to #act #actore oremoment o# /21m an- #actore- shear #orce o# 2/1) n a--ition to these3 the +eam section is also su+.ecte- to #actore- torsional moment o# (1m) "esign a +eam ,ith M20 mi4 an- Fe&00 gra-e steel)
20
2.
"esign a $!! sla+ supporte- on all its #our e-ges over a room o# si5e ()9&m 6 &)2&m ,hose t,o long e-ges are continuous an- corners are restraine restraine- at support) support) * #inishing #inishing sur#ace sur#ace o# cement cement concrete concrete o# 20mm is provi-e- over the sla+) 'he live loa- acting on the sla+ is %17m 2) 8se M20 mi4 an- Fe %& gra-e steel
20
3.
"esign a smmetricall rein#orce- +ia4iall eccentricall loa-e- +racecolumn o# si5e (00mm 6 %;0mm -e#orme- in single curvature ,ith #ollo,ing -ata)
20
E##ective length #or +en-ing parallel to larger -imension
&)%m
E##ective length #or +en-ing ing parallel lel to smaller -imension
%)2m
8nsupporte- length
&);m
Factore- a4ial loa-
02& 1
FactoreFactore- moment moment in the -irection -irection o# larger larger -imension -imension
Fac Factore tore- mome oment in the -ire irection tion o# short hortee- -ime imensio nsion n
0; 1m at top an- >( 1m at +ottom %2 1m at top an- 2; 1m at +ottom
!oncrete mi4
M20
$ein#orcement
Fe%&
'he column is +ent in single curvature) 4.
"esign the spherical top -ome o# an $! overhea- int5 tank ,ith million litre capacit) 8se M20 concrete an- Fe %& steel) Live loa- over it is )& 17m2) Provi-e height o# clin-rical ,all portion as ;m) Sho, -esign -ra,ing)
5.
?rite short notes on: (Any Four)
20
%6&
a= Limitation o# Plain !ement !oncrete += Factor o# sa#et an- partial sa#et #actor c= Basic re@uirements o# li@ui- retaining structure -= Factors in#luencing -e#lections o# +eam e= "esign steps o# ra#t #oun-ation
2
