Download JNTUK (Jawaharlal Nehru Technological University Kakinada (JNTU kakinada)) M.Tech (ME is Master of Engineering) 2020 R19 Civil 1105 Design Of Reinforced Concrete Fndations Structural Engineering Model Previous Question Paper
I M. Tech I Semester (R19) Regular Examinations
DESIGN OF REINFORCED CONCRETE FNDATIONS
STRUCTURAL ENGINEERING
MODEL QUESTION PAPER
TIME: 3 Hrs. Max. Marks: 75 Marks
Answer ONE Question from EACH UNIT
All questions carry equal marks
*****
CO KL M
UNIT - I
1. a). Explain the design requirements of the fndation. CO1 K4 5
b). Design a concrete pedestal for supporting a steel column carrying a total factored
load of 1700kN. The size of the base plate is 300 mm square. Assume grade 25
concrete and Fe 415 steel.
CO2
K6
10
(OR)
2. a). Explain the general procedure for design of square or rectangular footing. CO2 K4 5
b). A solid footing has to transfer a dead load of 1000kN and an imposed load
400kN from a square footing 400 X 400 mm (with 16 mm bars). Assuming
f
y
= 415 N/mm
2
,f
ck
= 20 N/mm
2
,and safe bearing capacity to be 200 KN/m
2
.Design the footing.
CO2
K6
10
UNIT - II
3. a). Explain the types of fndations of partitions walls in grnd floors CO1 K4 5
b). A brick wall of 250mm thick of a two-storeyed building is to rest directly on a
R.C strip footing. Design the footing assuming the soil is sandy and its safe
bearing capacity to be 100kN/mm
2
.
CO2
K6
10
(OR)
4. a). Explain the different methods of analysis of continus strip footing for un
symmetric loading.
CO1 K4 5
b). A series of five columns is to be supported on a 20m x 2m strip fndation.
Determine the Shear force and Bending moment for design. Assume safe bearing
capacity as 100kN/m
2
.
The loads are 300,350,400,450 and 500kN at
2,7.5,11.5,15,18 m from one end.
CO2
K5
10
UNIT - III
5. a). Explain abt the rigid and Flexible Fndations. CO1 K4 7?
b). Explain abt the deflection requirements of beams and slabs in rafts. CO3 K4 7?
(OR)
6. a). Explain the different types of raft fndation. CO3 K4 5
b). Design a flat slab raft with edge beam for a layt of column loads by Direct
Design Method. Assume the safe bearing capacity from settlement considerations
as 50kN/m
2
.Assume columns are 300 x 300 mm enlarged to 600 x 600 mm as
capital
CO4
K6
10
UNIT - IV
7. a). Discuss abt the estimation of settlement of piles in detail CO3 K3 5
b). A bored pile of total length 13.2 m is with enlarged base has a shaft diameter of
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[M19 ST 1105]
I M. Tech I Semester (R19) Regular Examinations
DESIGN OF REINFORCED CONCRETE FNDATIONS
STRUCTURAL ENGINEERING
MODEL QUESTION PAPER
TIME: 3 Hrs. Max. Marks: 75 Marks
Answer ONE Question from EACH UNIT
All questions carry equal marks
*****
CO KL M
UNIT - I
1. a). Explain the design requirements of the fndation. CO1 K4 5
b). Design a concrete pedestal for supporting a steel column carrying a total factored
load of 1700kN. The size of the base plate is 300 mm square. Assume grade 25
concrete and Fe 415 steel.
CO2
K6
10
(OR)
2. a). Explain the general procedure for design of square or rectangular footing. CO2 K4 5
b). A solid footing has to transfer a dead load of 1000kN and an imposed load
400kN from a square footing 400 X 400 mm (with 16 mm bars). Assuming
f
y
= 415 N/mm
2
,f
ck
= 20 N/mm
2
,and safe bearing capacity to be 200 KN/m
2
.Design the footing.
CO2
K6
10
UNIT - II
3. a). Explain the types of fndations of partitions walls in grnd floors CO1 K4 5
b). A brick wall of 250mm thick of a two-storeyed building is to rest directly on a
R.C strip footing. Design the footing assuming the soil is sandy and its safe
bearing capacity to be 100kN/mm
2
.
CO2
K6
10
(OR)
4. a). Explain the different methods of analysis of continus strip footing for un
symmetric loading.
CO1 K4 5
b). A series of five columns is to be supported on a 20m x 2m strip fndation.
Determine the Shear force and Bending moment for design. Assume safe bearing
capacity as 100kN/m
2
.
The loads are 300,350,400,450 and 500kN at
2,7.5,11.5,15,18 m from one end.
CO2
K5
10
UNIT - III
5. a). Explain abt the rigid and Flexible Fndations. CO1 K4 7?
b). Explain abt the deflection requirements of beams and slabs in rafts. CO3 K4 7?
(OR)
6. a). Explain the different types of raft fndation. CO3 K4 5
b). Design a flat slab raft with edge beam for a layt of column loads by Direct
Design Method. Assume the safe bearing capacity from settlement considerations
as 50kN/m
2
.Assume columns are 300 x 300 mm enlarged to 600 x 600 mm as
capital
CO4
K6
10
UNIT - IV
7. a). Discuss abt the estimation of settlement of piles in detail CO3 K3 5
b). A bored pile of total length 13.2 m is with enlarged base has a shaft diameter of
600 mm and in the last 1.2m, it is enlarged to 1200 mm diameter. If the SPT (N)
value of clay in which the shaft is installed is 13 and that of the enlarged portion
is 15, estimate the settlement at the ultimate load of the pile.
CO3 K5 10
(OR)
8. a). Explain abt the conventional analysis of annular rafts. CO4 K4 5
b). The load from a circular water tank supported by six columns rests on a ring
beam, which in turn, rests on an annular raft. Assuming the mean radius of the
centres of column line is 8m and the total load from the tank is 30,000kN. Design
the ring beam.
CO2
K6
10
UNIT - V
9. a). Explain abt the significance of under -reamed piles for expansive soils. CO3 K4 5
b). The main brick wall of a room of a residential building is 225 mm thick and has a
loading of 40kN/m at the fndation level. Another cross wall of the same
thickness joins it and transmits a concentrated load of 35 kN. Design a layt of
under reamed piles and grade beam for the fndation of the main wall
CO3
K6
10
(OR)
10. a). Discuss abt the significance of Earth pressure on rigid walls CO1 K5 5
b). Design a cantilever retaining wall with level backfill to retain 4 m of earth
( ?=30?) of unit weight of 19 kN/m
2
CO2
K6 10
CO: Crse tcome
KL: Knowledge Level
M: Marks
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This post was last modified on 28 April 2020