JNTUK R16 4-2 Prestressed Concrete Material/Notes PDF Download

JNTUK R16 4-2 Prestressed Concrete Material/Notes PDF Download

Students those who are studying JNTUK R16 Civil Branch, Can Download Unit wise R16 4-2 Prestressed Concrete Material/Notes PDFs below.

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JNTUK R16 4-2 Prestressed Concrete Material/Notes PDF Download

OBJECTIVES:

  • Familiarize Students with concepts of prestressing
  • Equip student with different systems and devices used in prestressing
  • Understand the different losses of prestress including short and long term losses
  • Familiarize students with the analysis and design of prestressed concrete members under flexure, shear and torsion

UNIT-1

Basic concepts of Prestressing- Advantages and Applications of Prestressed Concretes, High Strength Concrete- Permissible Stresses, Shrinkage, Creep, Deformation Characteristics, High strength Steel- Types, Strength- Permissible Stresses- Relaxation of Stress, Cover Requirements.

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UNIT-2

Prestressing Systems- Introduction, Tensioning devices, Pre-tensioning Systems, Post tensioning Systems, Basic Assumptions in Analysis of prestress and design, Analysis of prestress, Resultant Stresses at a section- pressure line- Concepts of load balancing- Stresses in Tendons, Cracking moment.

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UNIT-3

Losses of Pre-stressing- Loss of Pre-stress in pre-tensioned and post tensioned members due to various causes -Elastic shortening of concrete, shrinkage of concrete, creep of concrete, Relaxation stress in steel, slip in anchorage, differential shrinkage- bending of members and frictional losses- Total losses allowed for design

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UNIT-4

Design for Flexural resistance- Types of flexural failure – Code proceduresDesign of sections for flexure- Control of deflections- Factors influencing DeflectionPrediction of short term and long term deflections.

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UNIT-5

Design for Shear and Torsion- Shear and Principal Stresses- Design of Shear reinforcements- Codal Provisions- Design for Torsion, Design for Combined bending, shear and torsion.

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UNIT-6

Transfer of Prestress in pre tensioned members- Transmission length- Bond stresses- end zone reinforcement- Codal provisions- Anchorage zone Stresses in Post tensioned members- Stress distribution in end block- Anchorage Zone reinforcement.

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TEXT BOOKS:

  1. Prestressed Concrete, N. Krishna Raju, Tata McGraw hill
  2. Prestressed Concrete, S. Ramamrutham

REFERENCE BOOKS:

  1. Prestressed Concrete, P. Dayaratnam
  2. Prestressed Concrete, T. Y. Lin & Burns, Wiley Publications

OUTCOMES:

  • Understand the different methods of prestressing
  • Estimate effective prestress including the short and long term losses
  • Analyze and design prestressed concrete beams under flexure and shear
  • Understand the relevant IS Codal provisions for prestressed concrete

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