Civil engineering perspective of moment of inertia

1. Shafkat Islam
ID: 10.01.03.061
Year: 4th Semester: 2nd
Department of Civil
Engineering
Ahsanullah University of
Science & Technology

2. Course No : CE 416
Course Title : Prestress
Concrete Design
Sessional
Course Teacher:
Munshi Galib Muktadir

3. Moment Of
Inertia

5. α

6. What is Torque or Moment?
Torque, moment or moment of force, is the tendency of a
force to rotate an object about an axis.
What is Angular acceleration?
Angular acceleration is the rate of change of angular
velocity and is usually denoted by the Greek letter alpha
(α).

10. Moment of Inertia
(Geometrical property of an area)
The moment of inertia of plane area or second moment
of inertia is a geometrical property of an area which
reflects how its points are distributed with regard to an
arbitrary axis.

13. Area Moment of Inertia
The Area Moment Of Inertia of a beams cross-sectional
area measures the beams ability to resist bending. The
larger the Moment of Inertia the less the beam will
bend.
The moment of inertia is a geometrical property of a
beam and depends on a reference axis. The smallest
Moment of Inertia about any axis passes through the
centroid.

18. Polar Moment Of Inertia
Moment of Inertia about the z axis
The Polar Area Moment Of Inertia of a beams
cross-sectional area measures the beams ability
to resist torsion. The larger the Polar Moment of
Inertia the less the beam will twist.

21. Thank You
for
Yours
Patience