PART C (2x12=24 marks)

7. a) SVhat is the difference between retrofitting and repair? Explain one method each for
retrofitting and repair of structural members. (7 marks) b) Explain in detail, the procedure for

design of shear walls as per IS 13920. marks '

8. a) Discuss the significance of eanhquake disaster mitigation. (3 marks)

b) A circular column 300 mm diameter is reinforced with 8 bars of 20 mm diameter as
main reinforcement and 10 mm diameter stirrups at 100 mm spacing. Assuming M 25
concrete. 40 mm clear cover and Fe 415 grade steel, design the special confining

reinforcement and show the detailing for a floor height of 3.5 m. (9 marks)

9. An ൫.൦. beam 25 cm x 50 cm spanning 3 m between supporting columns is reinforced
with 3 bars of 16 mm diameter at the top and bottom throughout with a clear cover of
40 mm. Thickness of the floor slab is 10 cm. Suggest suitable shear reinforcement as per
IS
13920 and show the detailing if it is to carry a live load of 1.5 kN/m. Assume M20

concrete and Fe 415 grade steel. (12 ma,ks)