Download AKTU (Dr. A.P.J. Abdul Kalam Technical University (AKTU), formerly Uttar Pradesh Technical University (UPTU) B-Tech 6th Semester (Sixth Semester) 2014-2015 Design Of Concrete Structures II Question Paper
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(F ollowing Paper 1]) and Roll No. to be filled in yourAnswer Book)
PAPER ID : 100601
Roll No; ? I
B. Tech.
(SEM. VT) THEORY EXAMINATION, 2014-15
DESIGN OF CONCRETE STRUCTURES ? 11
Time: 3 Hours] [Total Marks : 100
Note : (l) Attempt all questions.
(2) IS-456z2000 is permitted.
(3) Show the structural details in all design
problems.
(4)- Assume any suitable data, if not given.
(5) 'Answer all questions.
1 Attempt any two parts of the 10><2=20
following :
(a) Design an interior panel of a ?at slab with
drop for a live load of 4 kN/m2. The slab is
provided with a ?oor ?nish of 1 kN/m2. The
siZe of panel is 6m X6m. Use M-20 grade
concrete and Fe-415 steel.
(b) Discuss the direct design method for the design
of ?at slab. Also discuss shear considerations.
100601] , 1 [Contd...
(c) A ?at slab is supported on 500 mm dia.
columns. Column spaced at 8m x 7m apart in
both directions. The column head has a dia.
of 1000 mm. Determine the moments in ?at
slab along its 8 m span for end panel, as well
as for interior panel for column and middle
strips. Take live load of 4.5 kN/m2. Use M-20
concrete and Fe-415 steel.
Attempt any two of the following : 10X2=20
(a) A curved beam is size 300 mm x 600 mm and
subjected to a bending moment 120 kN/m at
support and 80 kN/m at midspan twisting
moment of, 10 kN/m and max. SF of 100 KN
at collapse. Design the beam. Use M-20 grade
concrete and Fe-415 'grade steel.
(5) Design a footing for the 250 mm_X 500 mm
size RCC column transmitting a load of
300 kN. The bearing capacity of soil to be
taken as 90 kN/In2 at 1.0 m below GL. Use
M20 concrete and F9415 grade steel.
(c) A square column 450 mm X 450 mm-supports
an axial load 1600 kN. Design a square
footing for the column. The safe bearing
capacity of the soil in 250 kN/mz. Use M-25
concrete and Fe-4l5 grade steel.
100601] . 2 [Conan
Attempt any two parts of the 10x2=20
following :
(a) Design the RC cantilever retaining wall,
retaining levelled earth 5m above base slab.
Take the density of earth as 18 kN/m8 and
angle of repose of soil 'as 30 degree. Toe
projection 1.8 m, heel projection 1.7 m and
thickness of base slab as 450 mm.
(b) What are the various component of oounterfort
retaining wall ? Explain the concept of its
design.
(c) Design a slab culvert for a clear span of 4m
having a clear road way width of 7.5m between
kerbs for IRC class AA tracked loading,
wearing coat is 80 mm thick. Use M-25 concrete
and Fe-415 steel.
Attempt any two parts of the 10x2=20
following : ?
(a) Desian a square water tank 5m x 5m x 3m
(high) using any method. Tank is Open at top
and the ?xed to the ?at base which rests on
ground.
(b) Design a vertical wall and base of ?at base
circular water tank with ?exible joint with
base. The capacity of tank is 1000 kL. The
depth of water tank is restricted to 4.5 m, the
tank base is resting on ground. Use M-25
concrete and Fe-415 steel.
100601] ' 3. [Conn]...
(o)
What is intz tank ? What are its various
structural components ? Discuss how various
components of container are designed.
5 Attempt any twe parts of the lOXZ=20 .
following :
(a)
(b)
(0)
100601]
Explain with neat sketches the basic principles
of pre-stressed concrete subjected to (i) axial
prestressing (ii) eccentric prestressing. Discuss
the necessity of using high strength concrete
and high tensile steel in prestressed concrete
worls.
What are the various systems of prestressing ?
Explain the various mechanical anchoring
devices used in post tensioning work with neat
sketches.
A prestressed concrete beam of rectangular
section 120 mm wide 'and 300 mm deep is
prestressed by 6 wires of 6 mm dia provided
at an eccentricity of 55 mm. The initial stress
in the wires is 1150 N/mm2. Find the various
losses of stress. Take E8 = 2><105 Nimm2;
E0 = 3><104 N/rnm2 and weep coef?cient of
concrete = 1.5. M40 concrete has been used
in the beam.
4 t [11975]
This post was last modified on 29 January 2020