This presentation discusses axial force. Axial force is a force that acts along the longitudinal axis of a structural member and tends to elongate or shorten it. It can be a stretching or compressive force depending on its direction. The presentation defines axial force, discusses its nature and considerations for design. It provides examples of axial force on different members like columns, beams, shafts and cylinders. Calculation steps and formulas for determining axial force are also outlined.

1. WELCOME
TO MY
PRESENTATION

2. AHSANULLAH UNIVERSITY OF
SCIENCE AND TECHNOLOGY
DEPERTMENT OF CIVIL ENGINEERING
CE-416, Prestress Concrete Design Sessional
Course Teacher- MD. Galib Muktadir
Presented byRamim Al-Akram
ID-10.01.03.120

3. Presentation onAxial Force

4. An axial force is any force that directly acts on the
center axis of an object. These forces are typically
stretching force or compression force, depending on
direction. In addition, when the force load is even
across the form’s geometric center, it is concentric,
and when it is uneven, it is eccentric. Unlike many
acting forces, an axial force is often its own counter;
an object pulled or pushed evenly in opposing
directions doesn’t move.

5. Figure of Axial Force

6.  Axial force is a force that tends to elongate or shorten a
member & is normally measured in pounds. It is a system of
internal forces whose resultant is force that is acting along
the longitudinal axis of a structural member or assembly.

7.  Nature of axial force:
 These forces are typically stretching force or
compression force, depending on direction.
 Shear forces occupies a similar position to axial
force, but operates perpendicular to the centre
axis of the object.
 When a force is acting directly on the central axis,
it is an axial force. These force will often compress
the axis from either end or stretch the axis in two
opposing directions; as a result the object typically
does not move.

8.  Considerations:
Understanding the theory
 It’s limitations,
 It’s supplications for design
Analysis of axial members

9.  Calculation Steps:
 Identify the components. Axial force is
determined by width, effective length, and
load and is measured in kilo pounds or kips
(1,000 pounds of force).
 Used to also solve statically
indeterminate problems by using
superposition of the forces acting on the
free-body diagram
 First, choose any one of the two
supports as “redundant” and remove its
effect on the bar

10.  Thus, the bar becomes statically
determinate
 Apply principle of superposition and
solve the equations simultaneously
 Use an axial load calculator. Draw the
axial force diagram (free-hand) taking note
of each point where a transition occurs
and labeling and measuring this section
and and solve for axial force.

11.  Calculation Formula :
Axial loading occurs when an
object is loaded so that the
force is normal to the axis
that is fixed, as seen in the
figure. Taking statics into
consideration the force at
the wall should be equal to
the force that is applied to
the part.

12.  Multiple Loading:
In some cases there could be multiple axial loads placed on an
object, in that case the load on each section would need to be
determined by using statics, as can be seen in the following
figure.

13.  Axial Force on different members:
 Column
 Beam

14.  Axial Force on different members:
 Shaft
 Cylinder