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Structural Design - III (April 2010)

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Total No. of Questions : 8] P1299 [Total No. of Pages : 5 [3764] - 104 B.E. (Civil) STRUCTURAL DESIGN - III (2003 Course) Time : 4 Hours] [Max. Marks : 100 Instructions to the candidates: 1) Answer Q.1 or Q2, Q.3 or Q4 in Section - I. 2) Answer Q.5 or Q6, Q.7 or Q8 in Section - II. 3) Answers to the two sections should be written in separate books. 4) Figures to the right indicate full marks. 5) Use of Is 1343, IS 456, IS 3370 & non programmable calculator is allowed. 6) Neat diagrams must be drawn wherever necessary. 7) Assume any other data if necessary & mention it at the starting of the answer. 8) Mere reproduction from IS code as answer, will not be given full credit. 9) Assume any other data if required. SECTION - I Q1) a) Explain in brief : [8] i) ii) b) Lumped mass system in building frames. Single degree freedom. A post tensioned prestressed concrete beam section has top flange 550 150, web 150 550 and bottom flange 350 350 mm, is simply supported over a effective span of 16 m and carries a super imposed load of 12 kN/m over entire span. Calculate extreme fiber stresses in concrete at midspan at initial and final stage. Initial prestressing force is 1060 kN at eccentricity 450 mm at midspan and zero at support. Take loss ratio as 0.85 and unit weight concrete as 25 kN/m3. [17] OR P.T.O.

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Additional Info : April 2010 Examination - Structural Design - III (2003 Course)
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