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10.3 Classifying Structures

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Clarissa Medrano

on 15 June 2015

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Transcript of 10.3 Classifying Structures

By Henry and Clarissa
By Henry and Clarissa
Solid Structures
By Clarissa
Frame Structures
By Clarissa
Shell Structures
By Henry
Combination Structures
By Henry
Definition: A structure that is made up of shell, frame and solid structures.
Definition: A hollow structure with a curved shape providing high strength and rigidity.
Definition: an object that uses solid construction to support loads.
10.3 Classifying Structures
We can classify structures based on their function, or form. The three basic forms are solid, frame or shell. They all can withstand different loads. As there are basic forms, there are also complex structural forms such as combination structures which are often combinations of the three. Also, we can classify them as man-made or natural structures. For example, the Eiffel tower is a man-made frame structure and a spider web is a natural frame structure.
A solid structure is a strong large structure, relying on solid construction materials to support loads. A strong put together solid structure can last a very long time.
For example, dams are a solid structure because it uses cement (solid construction material) to support the large forces of water .
Definition: A network of parts that support loads.
In order for a frame structure to resist forces , each part must support each other. A single part of a structure cannot support the mass of the whole structure. The individual parts of a frame structure are connected to one
another. These connections require special support so that they do not
bend and collapse.
For example a suspension bridge, which carries loads on a bridge deck which is supported by vertical suspenders that are supported by suspension cables attached between towers and fastened at both ends of the bridge. All these parts support each other in order to support loads.
For example: a house can be a combination structure because it has a solid foundation. Also, it contains frame wood or metal that supports a shell of brick, concrete, wood or metal. Other combination structures include cars ( metal frame and a shell of plastic or metal), some bridges (solid piers and steel frame girders) and domed stadiums (solid concrete walls, frame and shell roof).
This structure uses the combinations of shell, frame and solid structures which makes the combination structure support multiple loads and rely on the materials used for the type of structure.
Shell structures can keep their shape and support loads, even without a frame, or solid mass material inside. The shape of a shell structure spreads forces throughout the whole structure, which means every part of the structure supports only a small part of the load, giving it its strength.
For example: eggs, bike helmets, igloos, turtle shells, and so on.
These are the different types of structure forms that engineers consider when constructing. They must see which type of structure can withstand the load that will be experienced by solid, frame, shell and/or combination structures.
Advantages and Disadvantages of Structure Forms
resists compression forces
Strong/Lasts very long time
Expensive to build
Takes up a lot of space
by Clarissa
Easy/Fast Construction
Not as expensive as solid structures
Width span restricted up to 40ft as it may cause movement perpendicular to the axial plane of the expansion joint
Simple design
decorative appearance/aesthetically pleasing
low in cost
doesn't use a lot of material
one small imperfection when constructing may cause the whole structure to fail.
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