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CHAPTER 12: COLUMNS
CONTENTS
Introduction to columns
Types of columns
Braced & Unbraced columns
Buckling in columns
Notes on columns
Des...
INTRODUCTION TO COLUMNS
Definition
Function
Dimensions
TYPES OF COLUMNS
According to shape
TYPES OF COLUMNS
According to material
TYPES OF COLUMNS
According lateral RFT
TYPES OF COLUMNS
According to side
bracing
TYPES OF COLUMNS
According to buckling
BRACED & UNBRACED COLUMNS
Bracing conditions
BRACED & UNBRACED COLUMNS
Bracing conditions
BUCKLING IN COLUMNS
Slenderness ratio
BUCKLING IN COLUMNS
Crushing & buckling
failure
BUCKLING IN COLUMNS
Crushing & buckling
failure
NOTES ON COLUMNS
Columns Dimensions
NOTES ON COLUMNS
Reinforcement Ratios
NOTES ON COLUMNS
Details of RFT
NOTES ON COLUMNS
Details of RFT
NOTES ON COLUMNS
Stirrups
NOTES ON COLUMNS
Stirrups
DESIGN OF SHORT COLUMNS
Working Stress Method
DESIGN OF SHORT COLUMNS
Ultimate Strength Method
ECCENTRIC LOADING ON SECTIONS
N = Compression
ECCENTRIC LOADING ON SECTIONS
N = Compression
(Big eccentricity)
ECCENTRIC LOADING ON SECTIONS
N = Compression
(Small eccentricity)
ECCENTRIC LOADING ON SECTIONS
N = Compression
(Small eccentricity)
ECCENTRIC LOADING ON SECTIONS
N = Tension
ECCENTRIC LOADING ON SECTIONS
N = Tension
(Big eccentricity)
ECCENTRIC LOADING ON SECTIONS
N = Tension
(Small eccentricity)
DESIGN OF LONG COLUMNS
Buckling effect
DESIGN OF LONG COLUMNS
Design Moments
(Braced)
DESIGN OF LONG COLUMNS
Design Moments
(Unbraced)
CHAPTER 12 PROBLEMS
1- Design a rectangular column subjected to working load = 300 ton.
Use Fcu = 250 Kg/cm2, Fy = 3600 Kg...
REFERENCES
Design of R.C. Structures, Eng. Ahmed Gamal Abdel Gawad.
Lectures in Reinforced Concrete, Eng. Yasser Elleath...
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الفصل الثاني عشر - الأعمدة - تصميم المنشآت الخرسانية المسلحة

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م. أحمد جمال عبد الجواد

الفصل الثاني عشر - الأعمدة - تصميم المنشآت الخرسانية المسلحة

  1. 1. CHAPTER 12: COLUMNS
  2. 2. CONTENTS Introduction to columns Types of columns Braced & Unbraced columns Buckling in columns Notes on columns Design of short columns Eccentric loading on sections Design of long columns Chapter 12 Problems
  3. 3. INTRODUCTION TO COLUMNS Definition Function Dimensions
  4. 4. TYPES OF COLUMNS According to shape
  5. 5. TYPES OF COLUMNS According to material
  6. 6. TYPES OF COLUMNS According lateral RFT
  7. 7. TYPES OF COLUMNS According to side bracing
  8. 8. TYPES OF COLUMNS According to buckling
  9. 9. BRACED & UNBRACED COLUMNS Bracing conditions
  10. 10. BRACED & UNBRACED COLUMNS Bracing conditions
  11. 11. BUCKLING IN COLUMNS Slenderness ratio
  12. 12. BUCKLING IN COLUMNS Crushing & buckling failure
  13. 13. BUCKLING IN COLUMNS Crushing & buckling failure
  14. 14. NOTES ON COLUMNS Columns Dimensions
  15. 15. NOTES ON COLUMNS Reinforcement Ratios
  16. 16. NOTES ON COLUMNS Details of RFT
  17. 17. NOTES ON COLUMNS Details of RFT
  18. 18. NOTES ON COLUMNS Stirrups
  19. 19. NOTES ON COLUMNS Stirrups
  20. 20. DESIGN OF SHORT COLUMNS Working Stress Method
  21. 21. DESIGN OF SHORT COLUMNS Ultimate Strength Method
  22. 22. ECCENTRIC LOADING ON SECTIONS N = Compression
  23. 23. ECCENTRIC LOADING ON SECTIONS N = Compression (Big eccentricity)
  24. 24. ECCENTRIC LOADING ON SECTIONS N = Compression (Small eccentricity)
  25. 25. ECCENTRIC LOADING ON SECTIONS N = Compression (Small eccentricity)
  26. 26. ECCENTRIC LOADING ON SECTIONS N = Tension
  27. 27. ECCENTRIC LOADING ON SECTIONS N = Tension (Big eccentricity)
  28. 28. ECCENTRIC LOADING ON SECTIONS N = Tension (Small eccentricity)
  29. 29. DESIGN OF LONG COLUMNS Buckling effect
  30. 30. DESIGN OF LONG COLUMNS Design Moments (Braced)
  31. 31. DESIGN OF LONG COLUMNS Design Moments (Unbraced)
  32. 32. CHAPTER 12 PROBLEMS 1- Design a rectangular column subjected to working load = 300 ton. Use Fcu = 250 Kg/cm2, Fy = 3600 Kg/cm2 by both working & ultimate methods. 2- Design the T-section shown in figure if it is subjected to ultimate loads M=450 KN.m, N(Comp.) = 600 KN. Use Fcu=25 N/mm2, Fy =360 N/mm2. 3- Design a braced column of 4.5 m height to resist an ultimate load of 220 ton and bending moments about the secondary axes of 10 and – 5 m.t. The column is partly fixes at both ends. Use Fcu=250 Kg/cm2, Fy =3600 Kg/cm2.
  33. 33. REFERENCES Design of R.C. Structures, Eng. Ahmed Gamal Abdel Gawad. Lectures in Reinforced Concrete, Eng. Yasser Elleathy. Design of Reinforced concrete, Dr. Magdy A. Tayel. Design of Reinforced Concrete Structure II, D. Mashhour A. Ghoneim. Reinforced Concrete, Dr. Nasr Younis.

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