Prestressed ConcreteR16 semester 4-2 lecture notes

Course Studying Goals:
The target of this course is:
• Familiarize College students with ideas of prestressing
• Equip pupil with completely different techniques and units utilized in prestressing
• Perceive the completely different losses of prestress together with quick and long run losses
• Familiarize college students with the evaluation and design of prestressed concrete members
below flexure, shear and torsion
Course Outcomes:
On the finish of this course the coed will have the ability to
• Perceive the completely different strategies of prestressing
• Estimate efficient prestress together with the quick and long run losses
• Analyze and design prestressed concrete beams below flexure and shear
• Perceive the related IS Codal provisions for prestressed concrete
SYLLABUS:
UNIT-I Fundamental ideas of Prestressing- Benefits and Functions of Prestressed
Concretes, Excessive Power Concrete- Permissible Stresses, Shrinkage, Creep, Deformation
Traits, Excessive power Metal- Sorts, Power- Permissible Stresses- Rest of
Stress, Cowl Necessities.
UNIT-II Prestressing Methods- Introduction, Tensioning units, Pre-tensioning Methods,
Put up tensioning Methods, Fundamental Assumptions in Evaluation of prestress and design, Evaluation of
prestress, Resultant Stresses at a section- strain line- Ideas of load balancing- Stresses
in Tendons, Cracking second.
UNIT-III Losses of Pre-stressing- Lack of Pre-stress in pre-tensioned and publish tensioned
members resulting from varied causes -Elastic shortening of concrete, shrinkage of concrete, creep
of concrete, Rest stress in metal, slip in anchorage, differential shrinkage- bending of
members and frictional losses- Complete losses allowed for design
UNIT-IV Design for Flexural resistance- Kinds of flexural failure – Code proceduresDesign of sections for flexure- Management of deflections- Components influencing DeflectionPrediction of quick time period and long run deflections.
UNIT-V Design for Shear and Torsion- Shear and Principal Stresses- Design of Shear
reinforcements- Codal Provisions- Design for Torsion, Design for Mixed bending, shear
and torsion.
IV 12 months – II Semester
L T P C
four zero zero 3
PRESTRESSED CONCRETE
UNIT-VI Switch of Prestress in pre tensioned members- Transmission length- Bond
stresses- finish zone reinforcement- Codal provisions- Anchorage zone Stresses in Put up
tensioned members- Stress distribution in finish block- Anchorage Zone reinforcement.
Textual content Books
1. Prestressed Concrete, N. Krishna Raju, Tata McGraw hill
2. Prestressed Concrete, S. Ramamrutham
References:
1. Prestressed Concrete, P. Dayaratnam
2. Prestressed Concrete, T. Y. Lin & Burns, Wiley Publications