2. It always seems
impossible until its
done.
We have two ears and
one mouth so that we
can listen twice as
much as we speak.
Nelson Mandela Epictetus
3. Introduction
Connections are structural elements used for
joining different members in steel framed
structures.
Steel structure is assemblage of different members
such as “beams, columns” which are connected to
each other usually at member ends that shows one
composite unit.
9. Riveted connections
Used for very long time.
Made up of:
Round ductile steel bar called shank having
head at one end.
The length of the rivet should be sufficient to form
the second head.
10. Installation
Heating of the rivet.
Insert the rivet from one end.
Squeezing the plain end by pneumatic driver round
head.
11. Bolted connection
Fastened together primarily by bolts.
Bolts may be loaded in:
Tension
Shear
Both Tension and Shear
12. The bolting operation is
very silent.
Bolting is cold process
hence there is no risk of
fire.
Bolting operation is more
quicker than riveting.
Less man power is
required in making the
connections.
If subjected to vibratory
loads, results in
reduction in strength
get loosened.
Unfinished bolts have
lesser strength
because of non uniform
diameter.
Advantages Disadvantages
13. Welded connection
Whose composite are primarily joined by weld.
Welding Notations were developed by American
Welding Society AWS.
14. Types of weld
Groove weld(more reliable than others).
Fillet weld(mostly use weaker than groove and
others).
Plug(expensive-poor transmission of tensile forces).
Slot (expensive-poor transmission of tensile forces).
15. It’s economical.
Provide rigid joints.
Efficiency is 100 % as
compared to rivets.
No provision for
expansion and
contraction therefore
greater chances of
cracking.
Uneven heating and
cooling- member may
distort –may result in
additional stresses.
Advantages Disadvantages
