JNTU Kakinada B-Tech 4-2 ADVANCED STRUCTURAL ENGINEERING R13 April 2018 Question Paper

IV B.Tech II Semester Regular/Supplementary Examinations, April – 2018
ADVANCED STRUCTURAL ENGINEERING (Civil Engineering)Time: 3 hours Max. Marks: 70
Question paper consists of Part-A and Part-B
Answer ONE question from Part-A
Answer any THREE questions from Part-B
*****

PART ?A (1×28 Marks)1. Design a reinforced concrete raft foundation connecting the columns of a multi
storied building. The columns are arranged in square grid 16 m by 16 m with
their spac in g ?s 4 m apart. The safe bearing capacity of the soil at the site is 100
kN/m
2
. The total service load on all the columns is 4800 kN. The columns are
400 mm by 400 mm in section. Adopt M20 grade concrete and Fe 415 HYSD
bars. Sketch the details of reinforcements in the raft foundation.

[28]

2 A rectangular water tank is to be designed to store 2500 kl water. The tank is to
be made just above the ground level and the safe bearing capacity of the soil is
75 kN/m
2
. Design the water tank for safe bearing capacity of soil of 75 kN/m
2
.
The roof and bottom slabs and the columns are with M20 concrete and the walls
are with M20 concrete.

[28]

PART ?B (3×14 = 42 Marks)3. Design an Intze tank for a capacity of 250,000 liters. Assume height of tank
floor as 12 m above ground level. Take the bearing capacity of soil as100
kN/m
2
. Wind pressure can be taken as 1200 N/m
2
or as per IS 875.

[14]

4. Design a flat slab with drop panels for a large single storey warehouse flat slab
roof with a panel size of 6 m x 6 m supported by columns of size 500 mm x 500
mm. The height of the columns is 5 m. Take live load as 3.0 kN/m
2
and the
weight of finishes including waterproof treatment as 2.5 kN/m
2
. Use M25
concrete and Fe 415 steel. Assume mild environment.

[14]

5. Design side walls and hopper bottom of a rectangular bunker of capacity 300
kN to store coal using M20 concrete and Fe 415 steel. Use unit weight of coal is
8 kN/m
2
.

[14]

Code No: RT42012C
Set No. 1
R13
1 of 2

IV B.Tech II Semester Regular/Supplementary Examinations, April – 2018
ADVANCED STRUCTURAL ENGINEERING (Civil Engineering)Time: 3 hours Max. Marks: 70
Question paper consists of Part-A and Part-B
Answer ONE question from Part-A
Answer any THREE questions from Part-B
*****

PART ?A (1×28 Marks)1. Design a reinforced concrete raft foundation connecting the columns of a multi
storied building. The columns are arranged in square grid 16 m by 16 m with
their spac in g ?s 4 m apart. The safe bearing capacity of the soil at the site is 100
kN/m
2
. The total service load on all the columns is 4800 kN. The columns are
400 mm by 400 mm in section. Adopt M20 grade concrete and Fe 415 HYSD
bars. Sketch the details of reinforcements in the raft foundation.

[28]

2 A rectangular water tank is to be designed to store 2500 kl water. The tank is to
be made just above the ground level and the safe bearing capacity of the soil is
75 kN/m
2
. Design the water tank for safe bearing capacity of soil of 75 kN/m
2
.
The roof and bottom slabs and the columns are with M20 concrete and the walls
are with M20 concrete.

[28]

PART ?B (3×14 = 42 Marks)3. Design an Intze tank for a capacity of 250,000 liters. Assume height of tank
floor as 12 m above ground level. Take the bearing capacity of soil as100
kN/m
2
. Wind pressure can be taken as 1200 N/m
2
or as per IS 875.

[14]

4. Design a flat slab with drop panels for a large single storey warehouse flat slab
roof with a panel size of 6 m x 6 m supported by columns of size 500 mm x 500
mm. The height of the columns is 5 m. Take live load as 3.0 kN/m
2
and the
weight of finishes including waterproof treatment as 2.5 kN/m
2
. Use M25
concrete and Fe 415 steel. Assume mild environment.

[14]

5. Design side walls and hopper bottom of a rectangular bunker of capacity 300
kN to store coal using M20 concrete and Fe 415 steel. Use unit weight of coal is
8 kN/m
2
.

[14]

Code No: RT42012C
Set No. 1
R13
1 of 2

6. Design a R.C chimney using M25 concrete and Fe 415 steel for the following
requirement and check the stresses at a depth 50 m below the top:
Diameter of chimney:
External = 4.3 m
Internal = 4.0 m
Air gap = 100 mm
Thickness of fire brick lining = 100 mm
Temperature difference = 80
0
C.
Coefficient of thermal expansion = 11 x 10
-6
/C.
Es = 210 x 10
3
N/mm
2
.
Unit weight of brick lined = 20 kN/m
3

Use M25 concrete and Fe 415 steel.
Assume wind load as per IS 875.

[14]

7. Explain the following bracing systems used in transmission towers and sketch
them. (a) Single web system (b) warren system (c) Pratt system (d) Portal system. (e) Offset bracing system.

[14]

2 of 2
Code No: RT42012C
Set No. 1
R13