last 3 digits= 888

Q3. A simply supported beam of length 12 m is subjected to a dead load (excluding self-weight) of 3+(W/600) (Last 3 digits of your id) kN/m and a live load of 5+(W/600) (Last 3 digits of your id) kN/m. The tendon is prestressed by a total force of P = 1550 kN with a constant eccentricity of 200 mm. The grade of concrete used is C-40, with a total loss at transfer as 25% of the jacking force. A T-section as shown in figure is used for the design and the structure has been designed for Class 2 criterion. Calculate the stresses at mid-span and support at transfer and serviceability limit state and comment on the results. Also find the number of 12.9 mm diameter strands (strength=1750 N/mm. Aps = 100 mm) required for the jacking force and if the strands are parabolic profiled, what would be the balanced load provided by the pre-stressing force. Calculate the flexural capacity of the member. 400 mm 250 600 mm 400 mm 800 mm