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14. A concrete girder of unsymmetrical I-section used for a bridge spans over 30 m and its self weight is 10.8kN/m. The
Posted: Thu Jul 14, 2022 2:54 pm
by answerhappygod
- 14 A Concrete Girder Of Unsymmetrical I Section Used For A Bridge Spans Over 30 M And Its Self Weight Is 10 8kn M The 1 (68.25 KiB) Viewed 44 times
14. A concrete girder of unsymmetrical I-section used for a bridge spans over 30 m and its self weight is 10.8kN/m. The girder is prestressed by a parabolic cable having an eccentricity of 580 mm at centre of span and 170 mm at supports towards the soffit of the girder. The initial force in the cable is 3200kN. If loss ratio is 0.85 and the creep coefficient is 1.6, modulus of elasticity of concrete is 34kN/mm2, estimate the long term deflection of the bridge girder and compare it with the permissible deflection as per IS:1343 code specifications. Assume second moment of area as 72490×106 mm4 and live load is 9kN/m.