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5.2 Estimate the deflection of a simply supported prestressed concrete beam at the prestress transfer. The beam span is
Posted: Mon May 16, 2022 7:52 am
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- 5 2 Estimate The Deflection Of A Simply Supported Prestressed Concrete Beam At The Prestress Transfer The Beam Span Is 1 (37.53 KiB) Viewed 27 times
5.2 Estimate the deflection of a simply supported prestressed concrete beam at the prestress transfer. The beam span is 12 m and has the rectangular cross-section of 200 (b) x 450 (h) mm. The unit weight of concrete is 25 kN/m². The tendon is in a parabolic shape. The eccentricity at the mid-span and the two ends is 120 mm and 50 mm below the sectional centroid, respectively. The tendon force after transfer is 600 kN. At the prestress transfer state, the elastic modulus of concrete E. = 20 kN/mm². (10 marks) Hint: The mid-span deflection due to UDL w is: 5 w y= 384 EI ML The mid-span deflection due to constant moment Mis: y = SEI