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Structures

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Transcript

  • 1. STRUCTURES
  • 2. A structure is a group of elements somehow united to support a load with stability
    • There are 6 types of structures.
    • 3. Frame Structures
    • 4. Shell Structures
    • 5. Arch
    • 6. Mix and Match
    • 7. Mass Structures
    • 8. Suspension Structures
  • 9. FRAME STRUCTURES
    • Is the most common choice of structure.
    • 10. These structures are composed of long elements joined to each other at the ends.
  • 11. SHELL STRUCTURES
    • Shell structures are made out of a thin outer layer of material that surrounds a volume.
    • 12. That volume can be empty space or can be filled with something that has no structural relevance.
  • 13. ARCH
    • There are many types,but the semicircular Arch,which was the Roman arch,still remains the most used.
    • 14. In Roman times,they were made of stone.
    • 15. Romans invented it.
  • 16. MIX AND MATCH
    • The combination of structures make more complex structure,this structures are called Mix&Match structures.
  • 17. MASS STRUCTURES
    • They are made of clump material,filling the body completely.
    • 18. The structure is normally thick.
    • 19. They can be made by piling up materials into a shape or design.
  • 20. SUSPENSION STRUCTURES
    • A suspension structure holds an element(often a beam) by cables that are held from the top of a tall column.
    • 21. The distance between one column and the next is calld the span.
  • 22. Structural elements can be defined by “the simplest part of the whole”.
    • The foundation is an element joined to the ground by friction.The foundation is also joined to the column by friction.
    • 23. The column is another element joined to the foundation and to the primary beams.
    • The beams and the column are joined by welding if they are metallic.
    • 24. Is some cases the beam can be laid on the column (Held by gravity.)
  • 25. All structural elements must be somehow united to the other elements.
    • Permanent unions are meant for structures that will not need to be dissasembled.
    • 26. Examples : Rivets,welding,glue...
    • Non-Permanent Unions are those designed to assemble and dissasemble the elements of the structureas many times as necessary
    • 27. Examples : Nuts and bolts,clamps,friction...
  • 28. TENSIONAL AND COMPRESSION
    • Is the strain that causes an element to stretch.It can be due to forces that pull an element from its ends
    • They are those forces which cause an element to get squeezed or buckled.
  • 29. SHEAR AND TORSION
    • Shear forces act across a material in such a way that they can force one part of an element to slide over another.
    • If you 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.
  • 30. BENDING FORCES
    • Bending forces act at an angle
    • 31. to a member (AT 90º from the axis line),
    • 32. making it bend.
  • 33. THE END Laura Aparicio Recio & María Megías Teijón

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