# Download VTU BE 2020 Jan ECE Question Paper 15 Scheme 5th Sem 15CV51 Design of RC Structural Elements

Download Visvesvaraya Technological University (VTU) BE ( Bachelor of Engineering) ECE (Electronic engineering) 2015 Scheme 2020 January Previous Question Paper 5th Sem 15CV51 Design of RC Structural Elements

Mg
15CV51
Fifth Semester B.E. Degree Examination, D
USN
Design of RC Structural Elements
Time: 3 hrs. Max. Marks: 80
Note:l. Answer any FIVE full questions, choosing ONE full question from each module.
2. Assume any missing data suitably
3. IS 456: 2000 and SP -16 are allowed.
Module-1
1 a. Explain the following with sketch.
(i) Characteristics load (ii) Characteristics strength (iii) Partial safety factors. (06 Marks)
b. Enumerate various limit states to be considered in design and explain briefly. (04 Marks)
c. With neat sketch of stress ? strain Diagram write the assumptions made in limit state
designing. (06 Marks)
OR
2 a. What is Stress block? Derive expression for stress block parameters. (06 Marks)
b. Explain briefly about balanced, under reinforced and over reinforced sections with strain
Diagram. (04 Marks)
c. Explain: i) Short term deflection ii) long-term deflection iii) Slenderness limits for beam
lateral stability. (06 Marks)
Module-2
3 a. Differentiate between singly reinforced and doubly reinforced beams, and list the situation
in which doubly reinforced section are used. (04 Marks)
b. A rectangular Reinforced concrete beam of size 300mm x 550mm is simply supported over
an effective span of 7mtr, is reinforced with 4 bars of 20mm diameter. Determine maximum
super imposed UDL which can be carried by beam apart from its self weight, and also find
area of tension steel to be modified to make section an balanced section. Use M20 grade
concert and Fe 415 steel. Assume effective cover for tension steel 50mm. Density of RCC
25kN/m
3
. (12 Marks)
OR
4 a. Write the expressions for moment resisting capacity of flanged sections for various cases of
Neutral axis depth with respect to Depth of Flange. (06 Marks)
b. A rectangular beam is 250mm wide and 500mm deep, is reinforced with 3 bars of 20mm dia
bars in compression zone. Determine the area of tension reinforcement needed to make the
section fully effective. Also find the moment of resistance of section. Assume M20 Grade
concrete and Fe 415 steel, cover for reinforcement is 50mm. (10 Marks)
Module-3
5 a. Brief about codal provisions made in providing longitudinal and lateral reinforcement in
beams. (04 Marks)
b. A simply supported rectangular beam is supported on 300mm wide walls, over a clear span
of 6mtrs. Design the beam by using M25 grade concrete and Fe 415 Grade steel.
Superimposed load on beam is 15kN/m and breadth of beam is 230mm. (12 Marks)
1 of 2
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Mg
15CV51
Fifth Semester B.E. Degree Examination, D
USN
Design of RC Structural Elements
Time: 3 hrs. Max. Marks: 80
Note:l. Answer any FIVE full questions, choosing ONE full question from each module.
2. Assume any missing data suitably
3. IS 456: 2000 and SP -16 are allowed.
Module-1
1 a. Explain the following with sketch.
(i) Characteristics load (ii) Characteristics strength (iii) Partial safety factors. (06 Marks)
b. Enumerate various limit states to be considered in design and explain briefly. (04 Marks)
c. With neat sketch of stress ? strain Diagram write the assumptions made in limit state
designing. (06 Marks)
OR
2 a. What is Stress block? Derive expression for stress block parameters. (06 Marks)
b. Explain briefly about balanced, under reinforced and over reinforced sections with strain
Diagram. (04 Marks)
c. Explain: i) Short term deflection ii) long-term deflection iii) Slenderness limits for beam
lateral stability. (06 Marks)
Module-2
3 a. Differentiate between singly reinforced and doubly reinforced beams, and list the situation
in which doubly reinforced section are used. (04 Marks)
b. A rectangular Reinforced concrete beam of size 300mm x 550mm is simply supported over
an effective span of 7mtr, is reinforced with 4 bars of 20mm diameter. Determine maximum
super imposed UDL which can be carried by beam apart from its self weight, and also find
area of tension steel to be modified to make section an balanced section. Use M20 grade
concert and Fe 415 steel. Assume effective cover for tension steel 50mm. Density of RCC
25kN/m
3
. (12 Marks)
OR
4 a. Write the expressions for moment resisting capacity of flanged sections for various cases of
Neutral axis depth with respect to Depth of Flange. (06 Marks)
b. A rectangular beam is 250mm wide and 500mm deep, is reinforced with 3 bars of 20mm dia
bars in compression zone. Determine the area of tension reinforcement needed to make the
section fully effective. Also find the moment of resistance of section. Assume M20 Grade
concrete and Fe 415 steel, cover for reinforcement is 50mm. (10 Marks)
Module-3
5 a. Brief about codal provisions made in providing longitudinal and lateral reinforcement in
beams. (04 Marks)
b. A simply supported rectangular beam is supported on 300mm wide walls, over a clear span
of 6mtrs. Design the beam by using M25 grade concrete and Fe 415 Grade steel.
Superimposed load on beam is 15kN/m and breadth of beam is 230mm. (12 Marks)
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15CV51
OR
6 a. What is Torsion? Write expression for equivalent bending moment and equivalent shear
force for members subjected to torsion. (03 Marks)
b. A T-beam slab floor has 125mm thick slab forming a part of T-beam. The end bearing are
450mm wide. Clear span is 8m. Spacing of T-beam is 3.5m clear. Live load on floor is
31cN/m
2
Design an intermediate beam. Use M20 Grade concrete and Fe 415 steel. (13 Marks)
Module-4
7 a. What is Development length? Write expression for Development length of MS and HYSD
bars. (04 Marks)
b. Design a cantilever balcony slab having projection of 1.25mtr from beam face. Consider live
2
and floor finish lkN/m
2
. Use M20 grade concrete and Fe 415 steel.
Calculate the development length of main steel to be embedded. (12 Marks)
OR
8 a. Differentiate between one way and two way slab, and mention codal provisions for steer_
reinforcement in slabs. (03 Marks)
b. Design two way slab for a room of size 4m x 5m. The slab is simply supported over 300mm
thick wall. Live load and floor finish on slab is 4kN/m
2
and 1 kN/m
2
respectively. Corners
are held Down. Use M20 Grade concrete and Fe 415 Grade steel. (13 Marks)
Module-5
9 a. What are the codal provision to design longitudinal and lateral reinforcement for columns.
(06 Marks)
b. A RC column of size 300mm x 400mm is 5 mtrs long is effectively held and restrained
against rotation at both ends subjected to an ultimate load of 1100kN and ultimate moment
of 150kN-m about major axis. Design column by using SP -16 for 2 side and 4 side
reinforcement arrangement. Use M25 Grade concrete and Fe415 steel. (10 Marks)
OR
10 Design a RC Footing for column size 400mm x 400mm, which carries a maximum load of
800kN. SBC of soil is 200kN/m
2
, If one side of footing is to be restricted to 1.50 mtr. Us