B F1030 Pages: 2

Reg No.:_ Name:
APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
SIXTH SEMESTER B.TECH DEGREE EXAMINATION(R&S), MAY 2019

Course Code: CE304
Course Name: DESIGN OF CONCRETE STRUCTURES - II

Max. Marks: 100 Duration: 3 Hours
Use of IS 456, IS 875, IS 1343, IS 3370 , SP 16 and SP 34 are permitted.
Assume any missing data suitably
PARTA
Answer any two full questions, each carries 15 marks. Marks
1 a) Ashort column 300 mm x 600 mm is carrying an axial working load of 700 kN (10)
and a moment of 150 kNm at an axis bisecting the depth. Design the
reinforcement required if Fy = 250 N/mm? and fck 20 N/mm”, Also sketch the

reinforcement.
b) Explain the design procedure of a slender column (5)
2 a) Design and detail a column under biaxial bending with the following data: (15)

Size of column = 40 x 60cm
The column is effectively held in position at both ends but not restrained
against rotation. The unsupported length of column is 3.5m
Concrete grade = M20
Grade of Steel = Fe 415
Factored load Pu = 1900 kN
Factored Moment Mux = 150 kNm
Muy = 110kNm

3 ஐ Design and detail an isolated rectangular footing for a column 400 mm x 600 गा (15)
to carry ೩ load of 2000 kN. The SBC of the soil is 180 kN/m?.Use M20 concrete
and Fe 415 grade steel

PART 13
Answer any two full questions, each carries 15 marks.

4 a) Acantilever retaining wall is designed to retain earth for a height of 4.4 m. The (15)
safe bearing capacity of soil is 200 kN/m? and unit weight of soil is 17.5 10/೧.
Coefficient of friction between soil and concrete is 0.55. Proportion the retaining
wall and check for stability. Also design and detail the heel and toe slab of the
retaining wall.

5 ച Under what circumstances the counterfort retaining wall is preferred? Give (10)
briefly the design procedure of a counterfort retaining wall. Also sketch the
reinforcement detail

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