by Jaime R. Rico

Are these structures?

So, what is a structure?

Something that protects someone or something

Something that supports s.o. or s.t.Something that contains s.o. or s.tSomething that…

Some conceptsA force is a push or pull that tends to cause

an object to change its movement or shape

A load is an external force which acts on a structure. (e.g. weight)

An stress is an internal force which acts on a structure.

DEFINITION OF STRUCTURE

A structure is an arrangement of elements that resists loads.

A structure is an element or a set (group) of elements that withstand (support) loads without breaking or distorting (disforming) excessively (too much).

What does it mean to withstand a load?

Structures withstand loads if they can support all the forces acting on them without collapsing or breaking.

TYPES OF LOADSRemember that a load is an external force

which acts on a structure.Loads are classified in:Static (or Death) load: is a permanent force,

acting on a structure. This includes the weight of the structure itself and

the non-moving parts it supports.

Dynamic (or Live) load: is a changing, or non-permanent force acting on a structure.

This includes the force of the wind and the weight of things that are in, or on a structure.

TYPES OF STRUCTURESWe can classified them attending to their

origin.

Natural structures: exist in the Nature.

Manufactured structures: are built by people.

NATURAL STRUCTURESAre not made by people.Occur naturally in the environment.Examples:

SkeletonNestEgg shell

MANUFACTURED STRUCTURESAre built by people.

Are classified in:Mass structuresFrame structuresShell structures

MASS STRUCTURESAre made piling up materialExamples:

PyramidDamWallCastle

PYRAMIDS

DAMS

WALLS

CASTLES

FRAME STRUCTURESAre made from bars joined together to form a

'framework‘

Most of the inside part of the structure is empty space

Are the most common construction choice. Why?

SHELL STRUCTURESUse a thin, carefully shaped, outer layer of

material, to provide their strength and rigidity

The shape of a shell structure spreads forces throughout the whole structure

Every part of the structure supports only a small part of the load, giving it its strength.

BODYWORK WII CONSOLE SHELL

SHELL-HOUSE

MIX STRUCTURES