Frames

What is a Frame?

A frame is primarily a two-dimensional structure consisting of horizontal and vertical members called chords and webs, respectively. These components create a rigid and stable framework that can withstand various types of forces and moments applied to it.

Chords, typically placed along the perimeter of the frame, resist axial forces and provide overall stability. Webs, on the other hand, are internal members that resist shear forces and help transfer loads between chords.

Types of Frames

Frames come in various types, each with its distinct characteristics. Here are some common types:

• Rigid Frames: These frames are fixed at their supports, meaning they cannot rotate or move at the joints.
• Simply Supported Frames: Unlike rigid frames, these frames are free to rotate at their supports, making them suitable for structures subjected to smaller loads.
• Continuous Frames: These frames consist of multiple spans interconnected at their supports, allowing for the distribution of loads over a larger area.
• Truss Frames: Truss frames are characterized by their triangular elements, which make them highly efficient in resisting bending moments.

Why Study Frames?

The study of frames is essential for structural engineers and architects involved in designing and analyzing load-bearing structures. Understanding frames enables them to: