Topic -Connections -Typical Joints for Steel Structures (From Web)

7/26/2019 Topic -Connections -Typical Joints for Steel Structures (From Web)

1/56

Typical Steel

Connections

Dr. Seshu Adluri


2/56

Steel Connections -Dr. Seshu Adluri

Introduction

Steel ConnectionsMany configurations are used for force

transfer in connections. Theconfiguration depends upon the type ofconnecting elements, nature and

magnitude of the forces (and moments),available equipment, fabrication anderection considerations, cost, etc.


3/56


Rivets


4/56


Bolts


5/56


Connections

Many types based on function Beam-to-Beam Connections Beam-to-Column Connections

Column-to-Column Connections Column Base Plates

Pocket Beam

Gusset plate connections (truss type, frame type,bracings, )

Splices (cover plates, )


6/56Steel Connections -Dr. Seshu Adluri

Cover plates



Cover plates



Column splice



Gusset plateconnections



Force dispersion to gusset plates



Steel Framing Connections

Framed Connections Bolts only in web, not the flanges

Transmits only shear

Not bending moment

Accomplished with clip angles & bolts/welds

Moment Connections Transmit shear & moment

Flanges must be connected

Bolt/Weld Flanges

May require column stiffeners



Framedconnections

Only shear transfer

Equivalent to pinned

end for the beam

No moment at the

beam end

Rotation is freely (?)

allowed



Framedconnections

End reaction only

Web of the beam is

connected

No connection for

the flanges



Transfer

of shear

force in

frames



Beam-to-beam connections



Beam-to-beam

connections



Beam-to-column connections



Beam-to-column

connections



Beam tocolumn joints



Beam to column joints



Beamto

columnjoints


25/56




26/56




27/56


Beam-to-column

connections


28/56


Beam to Column Rigid Joints

Bending moment from the

beamColumn

Beam


29/56


Beam to Column Rigid Joints The bending

moment of thebeam is primarilytaken by the

flanges in the formof tension andcompressionforces


30/56


Beam to Column

Rigid Joints


31/56


Beam to ColumnRigid Joints


32/56




33/56


Beam to Column Rigid Joints Stiffener plates are

used to shore upthe column flangesagainst the forces

transmitted by thebeam flanges. Thestiffeners may be fulllength or may extend

only part of thecolumn web depth.


34/56


Beam plate buckling

Beam web crippling

Beam flange local buckling


35/56


Beam plate buckling

Beam web buckling (look closely)

Beam web local yielding


36/56


Concentrated forces on webs


37/56




38/56


Beam to Column Semi-Rigid

Joints


39/56


Beam to Column Rigid Joints Stiffener plates are

used to shore upthe column flangesagainst the forces

transmitted by thebeam flanges. Thestiffeners may be fulllength or may extend

only part of thecolumn web depth.


40/56




41/56


Beam to Column Rigid Joints The bending

moment of thebeam is primarily

taken by the

flanges in the formof tension and

compression forces

The bendingmoment of thecolumn is alsoresolved as a force

couple

Column

Beam


42/56


Beam to Column Rigid Joints Stiffeners help in

distributing the forces inthe connection zone andin avoiding local rupture,

crushing or buckling ofthe beam web. Column

Beam


43/56


Beam toColumn

RigidJoints


44/56


Beam Splices


45/56


Beam Splices


46/56


ColumnSplices


47/56


ColumnSplices


48/56


Connections forBents (Eves)


49/56


Connections forBents (Eves)


50/56


Connections

in frames


51/56


Bracing

Connections

in frames


52/56


Column Bases


53/56


Column Base Anchors


54/56


Beam-to-wall connections


55/56


Beam-to-wall connections


56/56

References

Many pictures in this file are taken fromvarious sources such as CISC, AISC, etc.The copyrights for those materials are with

the original sources. No copyright isclaimed or implied by Dr. Seshu Adluri forthings that are already under copyright

protection. This file is for teachingpurposes.

Documents

Topic -Connections -Typical Joints for Steel Structures (From Web)