Module 1: Introduction – Theory, Behaviour and Materials
Introduction: Basic concept of pre-stressing (including advantages and disadvantages), Basic Definitions; Pre-stressing methods - Thermo elastic, chemical , Electrical; Material Properties - Concrete and Pre-stressing steel; Pre-stressing Systems - Pre-tensioning and Post-tension systems.
Module 2: Losses in Pre-stress
Purpose of calculating losses – Elastic loss, creep, shrinkage, relaxation and anchorage losses; Friction loss in pre-stress, Force variation diagram in friction loss.
Module 3: Analysis and Design For Flexure
Analysis of stresses by stress method, force method and load balancing method; Pre-Basic assumptions for calculating flexural stresses, permissible stresses in steel and concrete as per IS 1343 Code; Design of sections of Type II and Type III Post-tensioned (PT) Beams/slabs;Check for strength limit based on IS 1343; Layout of cables in PT -beams/slabs.
Module 4: Deflection and Design of Anchorage Zone
Factors influencing deflections – Short term deflections of un-cracked members; Prediction of long term deflections due to creep and shrinkage; Check for serviceability limit state of deflection, estimation of crack width. Determination of anchorage zone stresses in post-tensioned beams by Magnel’s method, Guyon’s method and IS 1343 method; design of anchorage zone reinforcement, Check for transfer bond length in pre-tensioned beams.
Module 5: Special Topics
Continuous beams - concepts; Composite Construction of Pre-stressed and in situ Concrete; Pre-stressed Concrete Poles Piles Sleepers –concepts; Construction of Pre-stressed Concrete Structures.