To Flexural, shear, torsional resistance and design of Prestressed concrete section, Types of flexural failure, code procedures-shear and principal stresses, Prestressed concrete members in torsion, Analysis of end blocks: By Guyon’s method and Magnel’s method. To learn Composite sections, Analysis for stresses, differential shrinkage, general design considerations SYLLABUS: Introduction to Historic development- General principles of Pre-stressing- Pre-tensioning and Post tensioning- Advantages and limitations of Pre-stressing concrete- Materials- Methods and systems of Pres-stressing- Pre tensioning and Post tensioning methods- Different systems of Pre-stressing like Hoyer systems- Magnel systems, Freyssinet system and Gifford Udall system. Analysis of prestress and Bending stresses: Assumptions Analysis of prestress Resultant stress at a section pressure line concept – – – – – of load balancing stresses in tendons. – Losses of Pre-stressing- Loss of Pre-stress in pre-tensioned and post tensioned members due to various causes like elastic shortening of concrete, shrinkage of concrete, of concrete, Relaxation of steel, slip in anchorage. Deflections of pre-stressed concrete beams: Importance of control of deflections- factors influencing deflections- short term deflections of un cracked member prediction of long – term deflections Flexural, shear; tensional resistance and design of Prestressed concrete section. Types of flexural failure code procedures-shear and principal stresses Prestressed concrete – – members in torsion Design of sections for flexure, Axial Tension, Compression and – bending, shear. Analysis of end blocks: By Guyon’s method and Magnel’s method 6. Composite sections: Introduction-Analysis for stresses- differential shrinkage- general design considerations REFERENCES: Prestressed Concrete- N. Krishna Raju Prestressed Concrete- S. Ramamrutham Prestressed Concrete- P. Dayaratnam COMPOSITE MATERIALS (Elective-III)
To Flexural, shear, torsional resistance and design of Prestressed concrete section, Types of flexural failure, code procedures-shear and principal stresses, Prestressed concrete members in torsion, Analysis of end blocks: By Guyon’s method and Magnel’s method. To learn Composite sections, Analysis for stresses, differential shrinkage, general design considerations SYLLABUS: Introduction to Historic development- General principles of Pre-stressing- Pre-tensioning and Post tensioning- Advantages and limitations of Pre-stressing concrete- Materials- Methods and systems of Pres-stressing- Pre tensioning and Post tensioning methods- Different systems of Pre-stressing like Hoyer systems- Magnel systems, Freyssinet system and Gifford Udall system. Analysis of prestress and Bending stresses: Assumptions – Analysis of prestress – Resultant – stress at a section – pressure line – concept of load balancing – stresses in tendons. Losses of Pre-stressing- Loss of Pre-stress in pre-tensioned and post tensioned members due to various causes like elastic shortening of concrete, shrinkage of concrete, of concrete, Relaxation of steel, slip in anchorage. Deflections of pre-stressed concrete beams: Importance of control of deflections- factors influencing deflections- short term deflections of un cracked member – prediction of long term deflections Flexural, shear; tensional resistance and design of Prestressed concrete section. Types of flexural failure – code procedures-shear and principal stresses – Prestressed concrete members in torsion – Design of sections for flexure, Axial Tension, Compression and bending, shear. Analysis of end blocks: By Guyon’s method and Magnel’s method 6. Composite sections: Introduction-Analysis for stresses- differential shrinkage- general design considerations REFERENCES: Prestressed Concrete- N. Krishna Raju Prestressed Concrete- S. Ramamrutham Prestressed Concrete- P. Dayaratnam COMPOSITE MATERIALS (Elective-III)