Tecnology project structures


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Tecnology project structures

  2. 2. INDEX <ul><li>Structures
  3. 3. Types of structures
  4. 4. Structural elements
  5. 5. Types of unions
  6. 6. Forces on structural elements. </li></ul>
  7. 7. STRUCTURES <ul><li>A structure is a group of elements somehow united to support a load with stability.
  8. 8. Everything has a structure, otherwise it would colapse under the force of gravity, the force of wind, or any other force.
  9. 9. Examples: Humans----->skeletons
  10. 10. Bicycles---->frame
  11. 11. Houses----->columns, beans and roof. </li></ul>
  12. 12. TYPES OF STRUCTURES: FRAME <ul><li>Is the common choice of structures.
  13. 13. Are compose of long elements, join to each other(bars and tubes).
  14. 14. Are made of strong materials.
  15. 15. They are easy to buy and build, they don't require much material, but they are expensive to manufacture. </li></ul>
  17. 17. TYPES OF STRUCTURES: SHELL <ul><li>Are made of a thin outer layer material.
  18. 18. They are like a strong and hard coat that maintains the required shape.
  19. 19. Examples: cardboard boxes, bottles, cars, eggs and airplanes. </li></ul>
  20. 20. TYPES OF STRUCTURES: ARCH <ul><li>There are many types, but the semicircular arch still remain the most used.
  21. 21. Free spaces is left under the arch, consequently rivers, streams or other obstacle can pass down it. </li></ul>
  22. 22. MIX AND MATCH <ul><li>Sometimes different types of structures are combined in one. </li></ul>
  23. 23. TYPES OF STRUCTURES: MASS <ul><li>They are simply made of clump material filling the body completly.
  24. 24. Low cuality material are used.
  25. 25. Natural examples: Mountains or coral reefs.
  26. 26. Manmade examples: Dams or load bearing walls. </li></ul>
  27. 27. TYPES OF STRUCTURES: SUSPENSION <ul><li>A suspension structures hold an element by cables that are held from the top of a tall comlumn.
  28. 28. The space between one colum and the next is call the spam. Suspension strctures have the longest spam of all strcutures. </li></ul>
  29. 29. STRUCTURAL ELEMENTS <ul><li>Element: The simplest part of the whole.
  30. 30. The forces for every element are calculated, and the elements is designed to withstand them.
  31. 31. The parts of an structural element are fundations, columns, beans and primary beans. </li></ul>
  32. 32. TYPES OF UNIONS <ul><li>They must be united.
  33. 33. Structural elements must be somehow united to the other elements of the structure.
  34. 34. Unions classified into::
  35. 35. Permanent unions :they dont need to be desassembled.
  36. 36. Non-permanent unions :they are designed to be assembled and disassembled when needed. </li></ul>
  37. 37. FORCES ON STRUCTURAL ELEMENTS <ul><li>Each of the elements in an structure will withstand a particular force which is a result fo the load that it is supporting.
  38. 38. There are five types of forces on structural elements:
  39. 39. Censional strain
  40. 40. Compression forces
  41. 41. Shear strain
  42. 42. Torsion forces
  43. 43. Bending forces </li></ul>
  44. 44. TENSIONAL STRAIN <ul><li>It is caused by forces that pull an element from its ends and starts. </li></ul>
  45. 45. COMPRESION FORCES <ul><li>Is caused by squeezed or buckled an element
  46. 46. When you squeeze an element it becomes shoter and thicker. </li></ul>
  47. 47. SHEAR STRAIN <ul><li>It is caused byact across a material in such a way that they can force one part of an element to slide over another. </li></ul>
  48. 48. TORSION FORCES <ul><li>It is caused by applying a force in one of the ends and suppot the other end, the element will twist. </li></ul>
  49. 49. BENDING FORCES <ul><li>It is caused by applying a force on the middle of the element an suppot the ends. </li></ul>
  50. 50. LOCAL STRUCTURES <ul>Meiac museum Espantaperros Tower </ul>
  51. 51. INTERNATIONAL STRUCTURES <ul>Giza piramids Kio towers </ul>