Prestressed Concrete UIT RGPV Previous Papers
Prestressed Concrete UIT RGPV Previous Papers
Prestressed Concrete UIT RGPV Previous Papers
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Prestressed Concrete 2014 02.jpg
Prestressed Concrete Prestressed Concrete CE 2014 01.jpg
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Prestressed Concrete 2012 02.jpg
Prestressed Concrete 2012 01 .jpg
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r.*e
Koll Numlxi
(D
CE-5203
Applied load
Load factors
'
5 KN/m
Permissible stresses
6.
Cy
>
to
1600
shear cracks.
- )
(ii)
(iii)
(iv)
'
(v>
'
. m su.is
I'imcr-Thrtse III.ura
Notes:- ( i/ Attempt any IIVI|u.
.i,
hi; All
(iv)
0. ( I )
- 2N
What is the neccssil) ol using hiffli strength concrete and high tensile steel in
prcstrcsscd concrete ?
(b) A simply supported preslressed concrete beam ol cross-section 400 mm \ mhi
mm covers a span of 10 m. Ii is subjected to an uniformi) distributed load ol 0
kN/m in addition to its self- weight and is prcstrcsscd with a force of 1 MO k\
with a prestressing cable ol parabolic prolile. Ihe cable is anchored at the
centre of gravity of the cross section at support scction and has a dip of 1 60 mm
at the middle cross section. Analyze the beam for the effects of prestressing and
the loads at mid cross section, using the philosophy of stress concept.
(a)
*
i* I N/irmi
vmk-*
-j
mm
with an initial stress ol 1000 N/inm2 are available for circumferential winding
and I reyssinct cables made up of 12 wires of 8 mm diameter stressed to 1200
N/mm are to be used for vertical prestressing. Design the tank walls assuming
the base us fixed. The cube strcng iof concrete is 40 N/mm .
Q. (4)
(a)
'
..
(h)
tv
ctkwater
(5)
<> I
d in |wct>i lion.r.i.
" U"'
mik
in the
'"
<b) The end block of a posj-usjsiaocd bridge girder u 600mm wide by 1 200 mm
deep. Two cables, each compn -to 97 high-tensile wires of 7 mm diameicr,
arc iDclmj uMug square aoch*/-pJac* of tide length 400 mm with their
centre* Ujicd J ffiiTi ma nn'imfcc iip nd hMm edges of Um Nan Ihr
racking tor in each cable w 4#0 IN lK*Mgn a suitable anchor aye /unc
reinforcement itinj! Ic-4I5 graoe IIYSII bun conforming o IS |M1 IWU)
code pruvisiom.
(J (6)
mm:.
Q. (7) A
concrete
picsucsxd
>
M (Xiraholk.
JDf) mm dccj* u
Hie cnble hni
term
/3')
77T
7i*w
,bc hcl*
bfTcctivc span * 20 m
Applied Uwd- 5 KN/m
Io*d lidflOL
Permissible stresses
fa
1600
What are different types of shear cracks? Discuss failure due to shear cracks.
))What are advantages of continuous member? Discuss methods of achieving
continuity
<y
<b) The end Nock of a post tensioned beam is 80 mm wide abd 160 mm deep. A
2 1 g pre-stressing wire. 7 mm in diameter, stressed to 1 200 N/mm2 has to be
1
anchored against the end block at the centre. The anchorage plate is 50 mm x 50
m. T he wire bears on the plate through a cone of 20 mm diameter. Given the
permissible stress in concrete at transfer, fa as 20 and the permissible shear in
steel as **4.5 N'mm2, Determine the thickness of the anchorage plate,
m:.
M. Icch-ll Scm
(Structural InKintfrlnR)
F.lectivc-I, Prcitreucd
Concrete
CE-5203 (B)
1 ""H1 3.00
lirs.
Maximum Marks-
2. Auim-
ii. ofr
11)11
mark*.
(IS:
A prestressed concrete beam, 200 mm wide and 300 mm deep, is prestressed with
wires (area * 320 mm ) located at a constant eccentricity of 50 mm and carrying an
initial stress of 1000 N/mml Hie span of the beam is 10 m Calculate the
q | Rerccntageioss
of stress in wires if (a) The beam is pretensioned, and (b) the beam
Q /'tCl*