Module 1: Introduction, Prestressing Systems and Material Properties (7 Hours)
Topic
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Hours
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Basic Concept Early Attempts of Prestressing Brief History Development of Building Materials |
1
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Definitions Advantages of Prestressing Limitations of Prestressing Types of Prestressing • Source of prestressing force • External or internal prestressing • Pre-tensioning or post-tensioning • Linear or circular prestressing • Full, limited or partial prestressing • Uniaxial, biaxial or multiaxial prestressing |
1
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Prestressing Systems and Devices Pre-tensioning • Introduction • Stages Advantages Disadvantages Devices • Jacks • Anchoring devices • Harping devices |
1
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Post-tensioning • Introduction • Stages Advantages Disadvantages Devices • Anchoring devices • Sequence of anchoring • Jacks • Couplers • Grouting |
1
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Constituents of Concrete • Introduction • Aggregate • Cement • Water • Admixtures Hardened Concrete • Strength of concrete • Stiffness of concrete • Durability of concrete • High performance concrete • Allowable stresses in concrete |
1
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Hardened Concrete • Stress-strain curves for concrete • Creep of concrete • Shrinkage of concrete Properties of Grout Codal Provisions |
1
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Prestressing Steel • Introduction • Forms of prestressing steel • Types of prestressing steel • Properties of prestressing steel • Stress-strain curves for prestressing steel • Relaxation of steel • Durability • Fatigue Codal Provisions |
1
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Module 2: Losses in Prestress (3 Hours)
Topic
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Hours
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Notations • Geometric properties • Load variables Losses in Prestress • Elastic shortening • Pre-tensioned axial members • Pre-tensioned bending members • Post-tensioned axial members • Post-tensioned bending members |
1
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Losses in Prestress (Part I) • Friction • Anchorage slip Force Variation Diagram |
1
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Losses in Prestress (Part II) • Creep of concrete • Shrinkage of concrete • Relaxation of steel Total Time-dependent Loss |
1
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Module 3: Analysis of Members (6 Hours)
Topic
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Hours
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Analysis of Members Under Axial Load • Introduction • Analysis at transfer • Analysis at services loads • Analysis of ultimate strength • Analysis of behavior |
1
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Analysis of Member Under Flexure (Part I) • Introduction Analysis at Service Loads • Based on stress concept • Based on force concept • Based on load balancing concept |
1
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Analysis of Member Under Flexure (Part II) • Cracking moment • Kern point • Pressure line |
1
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Analysis of Member Under Flexure (Part III) Analysis for Ultimate Strength • Variation of stress in steel • Condition at ultimate limit state Analysis of Rectangular Sections |
1
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Analysis of Flanged Sections |
1
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Analysis of Partially Prestressed Sections Analysis of Un-bonded Post-tensioned Beams Analysis of Behaviour |
1
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Module 4: Design of Members (6 Hours)
Topic
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Hours
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Design of Members • Calculation of demand Design of members for Axial Tension • Design of prestressing force • Analysis of ultimate strength Design of Member for Flexure • Calculation of moment demand. • Preliminary design |
1
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Design of Sections for Flexure (Part I) • Final design • Final design for type 1 members • Special case |
1
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Design of Sections for Flexure (Part II) • Final design of type 2 members |
1
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Design of Sections for Flexure (Part III) • Choice of sections • Determination of limiting zone • Post-tensioning in stages |
1
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Design of sections for Flexure (Part IV) • Magnel’s graphical method |
1
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Detailing Requirements for Flexure Detailing Requirements for Shear Detailing Requirements for Torsion |
1
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Module 5: Analysis and Design for Shear and Torsion (6 Hours)
Topic
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Hours
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Analysis for Shear • Introduction • Stress in an uncracked beam • Types of cracks • Components of shear resistance • Modes of failure • Effect of prestressing force |
1
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Design for Shear (Part I) • Limit state of collapse for shear • Maximum permissible shear stress • Design of transverse reinforcement • Detailing requirement for shear |
1
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Design for Shear (Part II) • General comments • Design steps • Design of stirrups for flange |
1
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Analysis for Torsion • Introduction • Stresses in an uncracked beam • Crack pattern under pure torsion • Components of resistance for pure torsion • Modes of failure • Effect of prestressing force |
1
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Design for Torsion (Part I) • Limit state of collapse for torsion • Design of longitudinal reinforcement • Design of transverse reinforcement |
1
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Design for Torsion (Part II) • Detailing requirements • General comments • Design steps |
1
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Module 6: Calculations of Deflection and Crack Width (1 Hour)
Topic
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Hours
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Calculation of Deflection • Deflection due to gravity loads • Deflection due to prestressing force • Total deflection • Limits of deflection • Determination moment of inertia • Limits of span-to-effective depth ratio Calculation of Crack Width • Method of calculation • Limits of crack width |
1
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Module 7: Transmission of Prestress (2 Hours)
Topic
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Hours
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Transmission of Prestress (Part I) • Introduction • Pre-tensioned members Transmission length Development length End zone reinforcement |
1
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Transmission of Prestress (Part II) • Post-tensioned members End zone reinforcement Bearing plate |
1
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Module 8: Cantilever and Continuous Beams (3 Hours)
Topic
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Hours
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Cantilever Beams • Introduction • Analysis • Determination of limiting zone • Cable profile |
1
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Continuous Beams (Part I) • Introduction • Analysis • Incorporation of moment due to reactions • Pressure line due to prestressing force |
1
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Continuous Beams (Part II) • Concordant cable profile • Cable profiles • Partially continuous beams • Analysis at ultimate limit state • Moment redistribution |
1
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Module 9: Special Topics (6 Hours)
Topic
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Hours
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Composite Sections • Introduction • Analysis of composite sections • Design of composite sections • Analysis for horizontal shear transfer |
1
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One-way Slabs • Introduction • Analysis and design |
1
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Two-way Slabs (Part I) • Introduction • Analysis • Features in modeling and analysis • Distribution of moments to strips |
1
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Two-way Slabs (Part II) • Checking for shear capacity • Spandrel beams • Anchorage devices • Additional aspects |
1
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Compression Members • Introduction • Analysis • Development of interaction diagram • Effect of prestressing force |
1
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Circular Prestressing • Introduction • General analysis and design • Prestressed concrete pipes • Liquid storage tanks • Ring beams Conclusion |
1
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