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1. Jimma Institute of Technology
Civil Engineering Department
Reinforced Concrete Structure II
By: Kefiyalew Z. (M.Eng.)
Chapter-2: Column (Part-I)

2. Chapter-2
Analysis and Design of Columns

3. ❖Introduction
❖Column Construction Procedures
❖Frame types: sway, non-sway
❖Behavior of RC Columns
✓Section Capacity: Interaction Diagrams
✓Member Buckling
❖Design of Short Columns
❖Design of Slender Columns
❖Rebar Detailing
Contents

4. Introduction
RC Building Super structural Parts
Beams Slabs Columns Structural walls
Flexure + Shear
Axial Compression
+
Flexure
Provide lateral
resistance

5. Column Definition:
❖ A column is a vertical structural member
transmitting axial compression loads with or
without moments.
❖ Column support mainly vertical loads from the
floors and roof, and transmit these loads to the
foundation.
✓ Axially loaded columns,
✓ Columns under uni-axial bending,
✓ Columns under biaxial bending.
Introduction

6. Introduction
❖ Under gravity
loading:
➢ Interior columns
Axially loaded
➢ Edge columns
Uniaxial loading
➢ Corner columns
Biaxial loading

7. Introduction
❖ Depending on level of loading or construction requirements;
concrete columns may have different x-sectional detailing.
➢ Reinforced Concrete Column
➢ Composite Column
➢ In-filled Column
Concrete + Rebars
Concrete + Structural steel
Steel case + Plain/slightly reinforced
concrete

8. Introduction
❖ Depending on the structural or architectural requirements;
columns may have different x-sectional shape.
➢ Rectangular,
➢ Square,
➢ Circular,
➢ L-shaped
➢ T-shaped, etc..

9. Introduction
❖ Depending on the shape of columns and workmanship;
longitudinal rebars of columns may be held in position by
either ties or spirals.
Tied columns Spiral columns

10. Column Construction Procedures

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39. Column Construction Procedures

40. Frame types: sway, non-sway
Will be continued!