tecnología: structures
TRANSCRIPT
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STRUCTURESAND
FORCES
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TYPES OF STRUCTURES
• Frame Structures
• Shell Structures
• Arch Structures
• Mix and Match
• Mass Structures
• Suspension Structures
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FRAME STRUCTURES
Is the most common choice of structures.
These structures are composed of long elements.
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SHELL STRUCTURES
Are made of a thin outer layer.
They are like a strong and hard coat that maintains the require shape
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ARCH STRUCTURES
The Romans invented the arch.
The stone at the very top is called the keystone
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MIX AND MATCH
Different types of structures are combined
The combination is a moree complex structure.
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MASS STRUCTURES
They are made of low quality of materials.
The structure is normally thick.
Advantage: Held in place by its own weight.
Disadvantage: Heavy need much material.
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SUSPENSION STRUCTURES
A suspension structure holds an element.
Are often best for bridges.
Good for covering a very large span.
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TYPES OF UNIONS
PERMANENT UNIONS:
They are meant for structures that will not needed to be disassembled.
Welding, rivets, glue...
NON-PERMANENT UNIONS:
Are those designed to assemble and disassemble the element of structures .
Nuts, bolts, clamps, friction...
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FORCES ON STRUCTURAL ELEMENTS
Tensional strain
Compression forces
Shear strain
Torsion forces
Bending forces
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TENSIONAL STRAIN
Is the strain that causes an element to stretch
It can be due to forces
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COMPRESSION FORCES
They are those forces which causes an element to get squeezed or buckled
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SHEAR STRAIN
Shear forces act across a material in such a way they can force.
A good example are when we cut with the scissors
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TORSION FORCES
If we apply a turning force called torque at one end of an element and, if the element is fixed to a support at the other end the element twists
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BENDING FORCES
Act at an angle to a member making it bend
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BY:
Manuel Folgado and Ramón Barrabés