In the design of pre-stressed concrete structures, which of the following limit states will come under the serviceability limit states?

Option 2 : Deflection and cracking

Explanation:

In the design of prestressed concrete structures,  the serviceability limit states consider deflection and cracking.

The acceptable limit for the safety and serviceability requirements before failure occurs is called a “limit state.

There are two limit states:

i) Limit state of collapse: The limit state of collapse of the structure or part of the structure could be assessed from rupture of one or more critical sections and from buckling due to elastic or plastic instability or overturning.

The resistance to bending, shear, torsion and axial load at every section shall not be less than the appropriate values at that section produced by the most unfavourable combination of loads on the structures using the appropriate partial safety factors.

ii) Limit state of serviceability: It consists of limit state of deflection and cracking.