Ahsanullah University of Science and Technology Department of Civil Engineering

CE-416Prestress Concrete Design Sessional

Presentation on

Axis System

Presented byMashrekur Rahman

Student ID: 10.01.03.001

Let us draw a line!

Engineers Use Axes!

What is an Axis?

An unlimited line, half-line, or line segment serving to orient a space or a geometric object, especially a line about which the object is symmetric.

2D and 3D Axes

Uses in Structural Analysis

1

• Represent the direction of internal and external forces

2

• Denote the relative position of structural members

Consider a Simply Supported Beam

External Forces

Local & Global Axes

Axial Force in a Beam

Rotational Axis

Torsional Action in Structural Members

Movement about Rotational Axis in a Prestressed I-beam

Axis System to analyze I-beam

Major Axis gives the algebraically larger moment of inertia.Minor Axis gives the relatively smaller moment of inertia.

Axis System and Prestressed Concrete

Axis system is the cradle of design and analysis of Prestressed Concrete members.

Feel Free To Ask Questions