Types of Structures
Things with a definite size and shape which serve a definite purpose.
What is a structure?
The measure of the amount of matter in an object
What is mass?
Concrete containing steel is an example of this.
What is a composite material
A device that can change the amount of force needed to move an object.
What is a lever?
The central stone in the top of the arch that directs the forces down the sides and to the ground
What is an arch?
Structures not made by people.
What are natural structures?
The force acting on an object that weighs 5 kilograms.
What is 50 Newtons? (5 kg times 10 N/kg)
This force resists, or works against the movement of two surfaces rubbing together.
What is friction?
All thin panels tend to bend and buckle when this happens.
What is they are compressed or a compression force is applied to them.
When balanced on its axle, this keeps pointing in the same direction, even if the structure on which it is spinning moves or turns.
What is a gyroscope?
These structures have a skeleton of very strong materials, which support the weight of the roof and covering materials with load-bearing walls.
What are frame structures?
A simple picture that uses arrows to show the strength and and direction of one or more forces.
What is a force diagram?
A measure of the largest tension force that a material can withstand before changing shape or breaking apart
What is tensile strength?
The wavelike shape in this type of cardboard gives it its strength.
What is corrugated?
Sometimes to support buildings or bridges, these large metal, concrete or wood cylinders are sunk through the loose soil until they rest on bedrock.
What is a piling?
These structures are completely empty and have a thin outside layer.
What are shell structures?
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This depends on the the masses and distance between two objects.
In a bent or twisted piece of metal the arrangement of particles is changed.
What is metal fatigue?
The strongest of these beams:
L-beam
Box beam
T- beam
Solid beam
What is a solid beam?
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This is a horizontal board or span, supported by a very strong column at one end.
A brick is an example of this kind of structure.
What is a mass structure?
A process in which pieces of metal or plastic are fused together by the application of heat
What is welding?
This is a changing or non-permanent force acting on a structure.
What is a live load?
These are the four considerations for a stable structure.
What are:
Firm foundation
Balance centre of gravity
Spread the load
Direct forces outward
Fasteners, ties, interlocking shapes, adhesives, and melted joints are five categories of this.
What are rigid joints?