SK SARFARAJUDDIN 34701322040 [CE(PE)702A].pptx

b.tech ppt for ca-1

1. IMPORTANCE & FACTORS AFFECTING ON SHORT TERM & LONG TERM DEFLECTION Presented By Name: SK SARFARAJUDDIN Roll No: 34701322040 Paper Name: PRESTRESSED CONCRETE Paper Code: CE(PE)702A Semester: 7 TH Department: CIVIL ENGINEERING CA1 Examination For 7 TH Semester (2024-2025)

2. IMPORTANCE & FACTORS AFFECTING ON SHORT TERM & LONG TERM DEFLECTION

3. Deflection in prestressed concrete structures is a critical aspect of structural engineering, influencing both the serviceability and durability of these constructions. Understanding and controlling deflection is essential for ensuring that structures perform as intended over their lifespan. This report delves into the importance of deflection, distinguishing between short-term and long-term deflections, and explores the various factors that affect them.

4. Importance of Deflection Serviceability Structural Integrity Durability Aesthetics

5. Serviceability Impact of excessive deflection on functionality User comfort and damage to non-structural elements

6. Structural Integrity Importance of understanding deflection behavior Ensuring safety and performance

7. Durability Role of deflection control in preventing cracking Prevention of harmful substance ingress

8. Aesthetics Visible deflection and its impact on appearance Importance in architectural applications

9. Factors Affecting Short-Term Deflection Introduction to key factors Loading, prestressing force, geometry, material properties, support conditions

10. Loading Magnitude and distribution of applied loads Uniform vs. point loads

11. Prestressing Force Amount and distribution of prestressing force Effect on initial camber and deflection

12. Geometry Span length, cross-sectional dimensions, and shape Influence on deflection

13. Material Properties Elastic modulus and compressive strength Impact on immediate deflection behavior

14. Support Conditions Type and rigidity of supports Effect on structural deformation

15. Factors Affecting Long-Term Deflection Introduction to key factors Creep, shrinkage, relaxation of prestressing tendons, temperature effects, loading history

16. Creep Time-dependent deformation under sustained load Influence of concrete mix and environmental conditions

17. Shrinkage Concrete shrinkage due to moisture loss Impact on prestressed members

18. Relaxation of Prestressing Tendons Loss of initial tension over time Effect on long-term deflection

19. Temperature Effects Expansion and contraction due to temperature variations Contribution to long-term deflection changes

20. Loading History Sequence and duration of applied loads Cumulative effects on long-term deflection

21. Mitigation Strategies Introduction to strategies for minimizing deflection Proper design, quality materials, creep and shrinkage control, temperature control, monitoring and maintenance

22. Proper Design Adequate prestressing force, cross-sectional dimensions, and detailing Importance for minimizing deflections

23. Quality Materials High-quality concrete and prestressing steel High modulus of elasticity to reduce deflection

24. Creep and Shrinkage Control Low water-cement ratio, proper curing, admixtures Measures to manage long-term deflections

25. Temperature Control Designing for temperature effects Allowances for expansion and contraction

26. Monitoring and Maintenance Regular monitoring of deflection Timely interventions for long-term performance

27. Conclusion Recap of key points Importance of managing deflection in prestressed concrete

28. ACKNOWLEDGEMENT I would like to express my special thanks of gratitude to my Class teacher for their able guidance and support in completing my Project. I would also like to extend my gratitude to the Principal PROF. CHANDAN DATTA and HOD Sir Mr. SUMAN DUTTA for providing me with all the facility that was required.   SK SARFARAJUDDIN ROLL NO:- 34701322040

29. THANKYOU