STRUCTURES

STRUCTURES

1. TYPES OF STRUCTURES

   • NATURAL STRUCTURES
     • Natural structures are not made by man. They are in living berings, in their composition, or the result of a geological process, for example, the shell of a crab, a bird´s nest or a cave
   • MAN_MADE STRUCTURES
     • The man-made structures are made by people to satisfy a need.Some examples are the legs of a table or the case of a camera.

2. LOADS AND FORCES

   • LOADS
     • A load is a force that acts on a structure. It can be fixed or variable.
       • FIXED OR PERMANENT LOADS
         • They don´t vary over time. An example would be the weight of the structure of a bridge and its component parts (Columns, road surface, etc...
       • VARIABLE LOADS
         • Variable loads vary over time, like traffic going across a bridge or the wind hitting it.
   • FORCES
     • A force is anithing that can deform a body.( STATIC EFFECT) or make it move or stop (DYNAMIC EFFECT)
       • STATIC EFFECT
       • DYNAMIC EFFECT

3. A structure is the set of elements in a body that are made to resist the effects of the forces that act on it.

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