Download Visvesvaraya Technological University (VTU) BE ( Bachelor of Engineering) Civil Engineering 17 Scheme 2020 January Previous Question Paper 5th Sem 7CVCT51 Design of RC structural Elements
I 7CV/CT51
ce-
f
an.2020
USN
Design of RC structural Elements
Time: 3 hrs. Max. Marks: 100
Note: Answer FIVE full questions, choosing ONE full question from each module.
Module-1
--.-
1 a. Define characteristic strength of materials and characteristic loads with sketches. (04 Marks)
,- ,-
b. Distinguish between : (i) Balanced section, (ii) Under -reinforced section and (iii) Over
-7)
reinforced section with sketches. Which section is preferable and why? (10 Marks)
1'
)
2
c.
Derive an expression for y , the depth of centre of compressive force from the extreme
.
L,:. ,,
n
compressive fiber for a singly reinforced rectangular beam section. (06 Marks)
c...7
--
.-.A d
OR
II
+
. 2 a. What are the assumption made in the limit state of design for collapse in flexure in singly
reinforced beam section. (04 Marks)
ti)
9-
,
1,
b. A simply supported beam has a rectangular section of size 300mm x 650n
-
un and carries a
. _-.
uniformly distributed load of 15 kl\f/m over a clear span of 5.5 m. It is reinforced with 4 bars
.,,, =
o of 25 mm diameter bar. Use M25 concrete and Fe 500 grade HYSD bars. Compute short and
a.)
o
,I,
0
long term deflections of the beam: (16 Marks)
tt,
v
u 1) Module-2 ..
r.
3 a. A reinforced concrete Cantilever beam 2 m long and having cross section of size
, 5
,.. ,.. 240mm x 400min is reinforced with 4 bars of 16 mm diameter at top on tension side. The
,... - beam is designed to support a concentrated load of 3 kN at the free end in addition to
.... 74
uniformly distributed load on it. Determine the permissible uniformly distributed load, the
?, >
_ .
beam can carry on it. Use M20 grade concrete and Fe 415 grade steel. (10 Marks)
.-.
.z.,
,
:7-.
b. A doubly reinforced beam section is 300 mm wide and 500 mm deep to the centre of tensile
-,.;
.
,--. 1)
,
E
.
: reinforcement. It is reinforced with compression reinforcement of 300 mm
2
at an effective
,,-,
-
0
,,,
cover of 50 mm and tension reinforcement of 1800 min
2
. Determine the safe moment of
=-
._
. .. .?,
resistance of the section. M20 grade concrete and Fe 500 grade steel is used (10 Marks)
-- >- u
cz
E
OR
..:- _, -,,,
._
?-, ,-,
4 A singly reinforced concrete slab 150 mm thick is reinforced with 10 mm diameter bars at
tx 0
.
- =
tt
200 mm centres located at an effective depth of 125 mm. M20 grade concrete and Fe415
t =
71 8 grade HYSD bars are used. Estimate the ultimate moment of resistance of the section.
>
P
c.) ?
(04 Marks)
>,
=
b.
A rectangular RC section of size 300 x 600mm effective is reinforced with 4 bars of 25 mm
D ?
.__: ,-.; diameter HYSD bar of grade Fe 415. Two of the tension bars are bent at 45? near the
support section. The bearri is provided with double legged vertical links of 8 mm diameter at
z 150 mm centres near supports. Using M-25 grade concrete, compute the ultimate shear
strength of the support section. (08 Marks)
et
c. A simply supported T-beam of depth of 450 mm has a flange width of 1000 mm and depth
of 120 mm. It is reinforced with 6 - 20 mm diameter bars on tension side with a clear cover
of 30 mm. M20 grade concrete and Fe415 grade steel are used. Calculate moment of
resistance of beam. Take, b,. = 300 mm. (08 Marks)
1 oft
FirstRanker.com - FirstRanker's Choice
Fifth Semester B.E. Degree Examination, Dec.
I 7CV/CT51
ce-
f
an.2020
USN
Design of RC structural Elements
Time: 3 hrs. Max. Marks: 100
Note: Answer FIVE full questions, choosing ONE full question from each module.
Module-1
--.-
1 a. Define characteristic strength of materials and characteristic loads with sketches. (04 Marks)
,- ,-
b. Distinguish between : (i) Balanced section, (ii) Under -reinforced section and (iii) Over
-7)
reinforced section with sketches. Which section is preferable and why? (10 Marks)
1'
)
2
c.
Derive an expression for y , the depth of centre of compressive force from the extreme
.
L,:. ,,
n
compressive fiber for a singly reinforced rectangular beam section. (06 Marks)
c...7
--
.-.A d
OR
II
+
. 2 a. What are the assumption made in the limit state of design for collapse in flexure in singly
reinforced beam section. (04 Marks)
ti)
9-
,
1,
b. A simply supported beam has a rectangular section of size 300mm x 650n
-
un and carries a
. _-.
uniformly distributed load of 15 kl\f/m over a clear span of 5.5 m. It is reinforced with 4 bars
.,,, =
o of 25 mm diameter bar. Use M25 concrete and Fe 500 grade HYSD bars. Compute short and
a.)
o
,I,
0
long term deflections of the beam: (16 Marks)
tt,
v
u 1) Module-2 ..
r.
3 a. A reinforced concrete Cantilever beam 2 m long and having cross section of size
, 5
,.. ,.. 240mm x 400min is reinforced with 4 bars of 16 mm diameter at top on tension side. The
,... - beam is designed to support a concentrated load of 3 kN at the free end in addition to
.... 74
uniformly distributed load on it. Determine the permissible uniformly distributed load, the
?, >
_ .
beam can carry on it. Use M20 grade concrete and Fe 415 grade steel. (10 Marks)
.-.
.z.,
,
:7-.
b. A doubly reinforced beam section is 300 mm wide and 500 mm deep to the centre of tensile
-,.;
.
,--. 1)
,
E
.
: reinforcement. It is reinforced with compression reinforcement of 300 mm
2
at an effective
,,-,
-
0
,,,
cover of 50 mm and tension reinforcement of 1800 min
2
. Determine the safe moment of
=-
._
. .. .?,
resistance of the section. M20 grade concrete and Fe 500 grade steel is used (10 Marks)
-- >- u
cz
E
OR
..:- _, -,,,
._
?-, ,-,
4 A singly reinforced concrete slab 150 mm thick is reinforced with 10 mm diameter bars at
tx 0
.
- =
tt
200 mm centres located at an effective depth of 125 mm. M20 grade concrete and Fe415
t =
71 8 grade HYSD bars are used. Estimate the ultimate moment of resistance of the section.
>
P
c.) ?
(04 Marks)
>,
=
b.
A rectangular RC section of size 300 x 600mm effective is reinforced with 4 bars of 25 mm
D ?
.__: ,-.; diameter HYSD bar of grade Fe 415. Two of the tension bars are bent at 45? near the
support section. The bearri is provided with double legged vertical links of 8 mm diameter at
z 150 mm centres near supports. Using M-25 grade concrete, compute the ultimate shear
strength of the support section. (08 Marks)
et
c. A simply supported T-beam of depth of 450 mm has a flange width of 1000 mm and depth
of 120 mm. It is reinforced with 6 - 20 mm diameter bars on tension side with a clear cover
of 30 mm. M20 grade concrete and Fe415 grade steel are used. Calculate moment of
resistance of beam. Take, b,. = 300 mm. (08 Marks)
1 oft
Module-3
5 a. Design a singly reinforced beam simply supported at its two ends for flexural reinforcement.
The clear span of beam is 5.6 m, the intensity of uniformly distributed superimposed dead
and live loads are 18 kN/m and 26 kN/m. Use M-25 grade of concrete and HYSD steel of
Fe500 grade. The beam should meet the durability requirement for exposed conditions of
`Severe atmospheric and fire resistance of one and half hour. (08 Marks)
b. Design a doubly reinforced rectangular beam of size 300mm x 600mm simply supported at
both ends. Check for deflection need not be calculated. The effective span is 5.6 m. The
beam carries a service imposed load of 24 kN/m and super imposed dead load of 16 kN/m.
Use M20 grade of concrete and HYSD steel of Fe415 grade. (12 Marks)
OR
6 Design an intermediate T-beam for a hall measuring 6.5m xl2m (clear dimensions). Beams
are spaced at 3 m C/C. Depth of slab is 150 mm. Super imposed live load on slab is
4.0 kN/m
2
, finishes is 1.0 kN/m
2
. Check for deflection also. Use M20 grade concrete and
HYSD bar of Fe500 grade. Sketch the reinforcement details. (20 Marks)
Module-4
7 Design a slab for a class room of dimension 4m x 6m (supported on all the four edges) with
two adjacent edges discontinuous. Live load = 3 kN/m', Floor finish = 1 kN/m
2
;
Bearing = 300 mm. Use M20 grade concrete and Fe500 grade steel. Check for deflection
need not be done. (20 Marks)
OR
8 Design the two flight dog legged stair for a hall of dimension (clear) 3m x 5m between the
floors. The floor to floor height is 3.2 m and rise is 160 mm. Also check for deflection. Use
M20 grade concrete and Fe500 grade steel. Sketch the reinforcement details of one flight.
(20 Marks)
Module-5
9 a. Design the necessary reinforcement for RC column 450mm x 600mm to carry an axial load
of 2000 kN. The length of the column is 3.5 m. Use M25 grade concrete and Fe415 grade
steel. Sketch the reinforcement details. (10 Marks)
b. A rectangular column 300 mm wide and 500 mm :deep is subjected to an axial factored load
of 1200 kN and a factored moment of 200 kN-m. Calculate the necessary reinforcement.
distributing equally on all four sides. Sketch the reinforcement details. Adopt M25 and
Fe500 grade materials. (10 Marks)
OR
10 Design a square footing of flat type for a column of size 400mm x 400mm to carry an axial
dead load of 800 kN and a live load of 1000 kN without any moment. Safe bearing capacity
of soil is 180 kN/m
2
. Adopt M20 grade concrete and Fe 500 grade steel. Sketch the footing
showing the details of reinforcement. (20 Marks)
2 oft
FirstRanker.com - FirstRanker's Choice
This post was last modified on 02 March 2020