Tecnologia Manuel y Ramon
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Transcript

  • 1. STRUCTURES AND FORCES
  • 2. TYPES OF STRUCTURES • Frame Structures • Shell Structures • Arch Structures • Mix and Match • Mass Structures • Suspension Structures
  • 3. FRAME STRUCTURES
    • Is the most common choice of structures.
    • 4. These structures are composed of long elements.
  • 5. SHELL STRUCTURES
    • Are made of a thin outer layer.
    • 6. They are like a strong and hard coat that maintains the require shape
  • 7. ARCH STRUCTURES
    • The Romans invented the arch.
    • 8. The stone at the very top is called the keystone
  • 9. MIX AND MATCH
    • Different types of structures are combined
    • The combination is a moree complex structure.
  • 10. MASS STRUCTURES
    • They are made of low quality of materials.
    • 11. The structure is normally thick.
    • 12. Advantage: Held in place by its own weight.
    • 13. Disadvantage : Heavy need much material.
  • 14. SUSPENSION STRUCTURES
    • A suspension structure holds an element.
    • 15. Are often best for bridges.
    • 16. Good for covering a very large span.
  • 17. TYPES OF UNIONS
    • PERMANENT UNIONS :
    • 18. They are meant for structures that will not needed to be disassembled.
    • 19. Welding, rivets, glue...
    • NON-PERMANENT UNIONS :
    • 20. Are those designed to assemble and disassemble the element of structures .
    • 21. Nuts, bolts, clamps, friction...
  • 22. FORCES ON STRUCTURAL ELEMENTS
  • 27. TENSIONAL STRAIN
    • Is the strain that causes an element to stretch
    • 28. It can be due to forces
  • 29. COMPRESSION FORCES
    • They are those forces which causes an element to get squeezed or buckled
  • 30. SHEAR STRAIN
    • Shear forces act across a material in such a way they can force.
    • 31. A good example are when we cut with the scissors
  • 32. 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
  • 33. BENDING FORCES
    • Act at an angle to a member making it bend
  • 34. BY: Manuel Folgado and Ramón Barrabés