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SEISMIC BEHAVIOR OF
BEAM COLUMN JOINTS IN
REINFORCED CONCRETE
MOMENT RESISTING
FRAMES
PAVANKUMAR N
4BW13CSE08
2ND SEMESTER M.TECH
STRUCTURAL
ENGINEERING
GUIDE-
Mr. CHETHAN GOWDA R K
 Introduction to Beam-Column Joint
 Types & Importance of Beam-Column Joint
 Seismic Behaviour of Joints
 Reinforcing Beam-column Joints
 Provision for Horizontal ties in beams
 Anchorage of beam bars
 Exterior joint
 Interior Joints
 In RC buildings, portions of columns
that are common to beams at their
intersections are called beam-
column joints.
 Since their constituent materials have
limited strengths, the joints have limited
force carrying capacity.
 When forces larger than these are applied
during earthquakes, joints are severely
damaged.
 Repairing damaged joints is difficult, and so
damage must be avoided. Thus, beam-column
joints must be designed to resist
earthquake effects.
Under earthquake shaking, the beams adjoining
a joint are subjected to moments in the same
(clockwise or counter-clockwise) direction .
Under these moments, the top bars in the
beam-column joint are pulled in one direction
and the bottom ones in the opposite direction .
If the column is not wide enough or if the
strength of concrete in the joint is low,
there is insufficient grip of concrete on
the steel bars.
In such circumstances, the bar slips inside
the joint region, and beams loose their
capacity to carry load.
one diagonal length of the joint elongates and
the other compresses . If the column cross-
sectional size is insufficient, the concrete in
the joint develops diagonal cracks.
 Diagonal cracking & crushing of concrete can
be prevented in Joints.
Mostly, for this large column size is the most
effective.
 Another way is providing steel ties also
known as stirrups.
Reinforcing the beam column joint
Reference
Seismic Behavior of Beam Column Joints in
Reinforced Concrete Moment Resisting
Frames, Document No. :: IITK-GSDMA-EQ31-
V1.0 Final Report :: A - Earthquake Codes
IITK-GSDMA Project on Building Codes
How do beam-column joints in RC buildings
Resist Earthquakes? IITK-BMTPC Earthquake
tips20
Thank you

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Seismic Behavior of Beam-Column Joints

  • 1. SEISMIC BEHAVIOR OF BEAM COLUMN JOINTS IN REINFORCED CONCRETE MOMENT RESISTING FRAMES PAVANKUMAR N 4BW13CSE08 2ND SEMESTER M.TECH STRUCTURAL ENGINEERING GUIDE- Mr. CHETHAN GOWDA R K
  • 2.  Introduction to Beam-Column Joint  Types & Importance of Beam-Column Joint  Seismic Behaviour of Joints  Reinforcing Beam-column Joints  Provision for Horizontal ties in beams  Anchorage of beam bars  Exterior joint  Interior Joints
  • 3.  In RC buildings, portions of columns that are common to beams at their intersections are called beam- column joints.
  • 4.
  • 5.  Since their constituent materials have limited strengths, the joints have limited force carrying capacity.  When forces larger than these are applied during earthquakes, joints are severely damaged.  Repairing damaged joints is difficult, and so damage must be avoided. Thus, beam-column joints must be designed to resist earthquake effects.
  • 6. Under earthquake shaking, the beams adjoining a joint are subjected to moments in the same (clockwise or counter-clockwise) direction . Under these moments, the top bars in the beam-column joint are pulled in one direction and the bottom ones in the opposite direction .
  • 7. If the column is not wide enough or if the strength of concrete in the joint is low, there is insufficient grip of concrete on the steel bars. In such circumstances, the bar slips inside the joint region, and beams loose their capacity to carry load.
  • 8. one diagonal length of the joint elongates and the other compresses . If the column cross- sectional size is insufficient, the concrete in the joint develops diagonal cracks.
  • 9.  Diagonal cracking & crushing of concrete can be prevented in Joints. Mostly, for this large column size is the most effective.  Another way is providing steel ties also known as stirrups. Reinforcing the beam column joint
  • 10.
  • 11.
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  • 13.
  • 14.
  • 15. Reference Seismic Behavior of Beam Column Joints in Reinforced Concrete Moment Resisting Frames, Document No. :: IITK-GSDMA-EQ31- V1.0 Final Report :: A - Earthquake Codes IITK-GSDMA Project on Building Codes How do beam-column joints in RC buildings Resist Earthquakes? IITK-BMTPC Earthquake tips20