engineering recuitment UKPSC Polytechnic Lecturer Mock Test 2024 Reinforced Concrete Structures Prestress Concrete Losses in Prestress
An ordinary mild steel bar has been prestressed to a working stress of 200 MPa. If the Young’s modulus of steel is 200 GPa and permanent negative strain due to shrinkage and creep is 0.0008, what is the effective stress left in the steel?
1
190 MPa
2
170 MPa
3
85 MPa
4
40 MPa