ASSIGNMENT II
NOTE:
- Viva will be taken during the submission of the assignment. So please study thoroughly while making/copying it.
- Submit the assignment until 15 Jul'13.
Q1. State the different assumptions in Limit State Analysis of Prestressed Concrete as per Clause 22.1.1 of
IS1343:1980.
Q2. Derive W (Load) with the help of Load Balancing Method for the following profiles of cables:
- Parabolic
- Sharp Change/ Single Harp
- Double Harp
Q3. Derive the different conditions for the Design of Prestressed Concrete of a rectangular section (bXd). (Ch-12, N.K. Raju)
Q4. A prestressed road bridge of span 10m consists of a concrete slab 380mm thick with parallel post-tensioned cables, in each of which the force at transfer is 360kN. If the bridge is required to support an udl of 25 kN/m2, with the tensile stress in the concrete not exceeding 0.7 N/mm2 at anu time, calculate the max. horizontal spacing of the cables, their distance from the soffit of the slab at mid-span & lowest possible position at the supports. Assume 20% loss of prestress after the transfer.
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