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structures (types of structures (Frame structures (These structures have…
structures
types of structures
Frame structures
These structures have long elements (bars, tubes...) joined to each other at the ends.
The elements of frame structures are made of strong materials.
Shell structures
Shell structures are made of a thin outer layer of material around a volume. That volume can be empty space or contain something with no structural relevance. The shell keeps the shape and supports the loads.
Arch
There are many types, but the semicircular arch, which was the Roman arch, is the most common.In Roman times, arches were made of stones. The stone at the very top is called the “keystone”.
Mix and Match
Very often, we combine different types of structures into a more complex structure.
Mass structures
Mass structures are a thick lump of low-quality
material.
To make mass structures we pile up materials
into a shape or design
Suspension structures
A suspension structure holds an element (often a beam) by cables that are held from the top of a tall column.
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Structural elements
In a structure, we calculate the forces for every element and we design the
element (i.e. beam or column) to support them.
Applications
The design of the structure of an object (a beam for a house, the shell of a car, etc) helps
reduce the amount of material used. This reduces the price and the weight and improves safety
Analysis of structural behaviour, using
different models
We know the effects of forces on structural elements. We can predict a structure’s behaviour under the forces that it will with stand.
We need to know the magnitude of the forces that act on a structure. The magnitude and type of forces depend on the use of the structure.