ACH 121 Lecture 05 (Structural Loads) Part 2

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ACH 121 Lecture 05 (Structural Loads) Part 2

  1. 1. STRUCTURES BUILDING SYSTEMS BUILDING LOADS STRUCTURAL FORCES STRUCTURAL MEMBERS
  2. 2. STRUCTURES & BUILDINGS STRUCTURAL MEMBERS CONCEPTS IN BUILDING
  3. 3. <ul><li>Columns </li></ul><ul><ul><li>Slender, rigid vertical element </li></ul></ul><ul><ul><li>Supports axial compressive loads applied at the ends </li></ul></ul><ul><ul><li>Longer the column, more likely to buckle under loading </li></ul></ul><ul><ul><li>Shorter the column, more likely to crush under loading </li></ul></ul><ul><ul><li>Distributes load from beams to foundation </li></ul></ul>Structural Members
  4. 4. <ul><li>Beams </li></ul><ul><ul><li>Rigid, horizontal element rests on columns </li></ul></ul><ul><ul><li>Subject to deflection under loading </li></ul></ul><ul><ul><li>Span of a beam is determined by material and depth. </li></ul></ul><ul><ul><li>Transfers loads to columns </li></ul></ul>Structural Members
  5. 5. <ul><li>Trusses </li></ul><ul><ul><li>Geometric frame based on triangles </li></ul></ul><ul><ul><li>Members are subject both tension and compressive forces </li></ul></ul>Structural Members
  6. 6. Structural Members <ul><li>Lateral Solutions </li></ul>
  7. 7. <ul><li>Lateral Solutions </li></ul>Structural Members
  8. 8. Structural Members <ul><li>Lateral Solutions </li></ul><ul><li>Post and Beam (rigid frame) </li></ul><ul><ul><li>Beam resting on column, but MUST be braced </li></ul></ul><ul><ul><li>Area filled in between post and beam becomes a loadbearing wall </li></ul></ul>
  9. 9. <ul><li>Slab (plate structure) </li></ul><ul><ul><li>Rigid, planar elements </li></ul></ul><ul><ul><li>Distributes loads in multiple directions </li></ul></ul><ul><ul><ul><li>Loads follow shortest and stiffest routes to underlying supports </li></ul></ul></ul>Structural Members
  10. 10. <ul><li>Lintels/Headers </li></ul><ul><ul><li>“ Beam/Header” Transfers load around an opening </li></ul></ul>Structural Members Header Lintel
  11. 11. <ul><li>Arches </li></ul><ul><ul><li>Arches are curved element for spanning large openings </li></ul></ul><ul><ul><li>Transfer the axial load to abutments on each side of the arch </li></ul></ul><ul><ul><li>The length of the opening is proportional to the height of the arch </li></ul></ul>Structural Members
  12. 12. <ul><li>Vaults </li></ul><ul><ul><li>Arched structure that forms a covering over a space </li></ul></ul><ul><ul><li>Behaves as an arch with a third-dimension </li></ul></ul><ul><ul><li>Two types </li></ul></ul><ul><ul><ul><li>Barrel </li></ul></ul></ul><ul><ul><ul><li>Groin (cross) </li></ul></ul></ul>Structural Members
  13. 13. Structural Connections & Joints
  14. 14. Structural Connections & Joints
  15. 15. STRUCTURES BUILDING SYSTEMS BUILDING LOADS STRUCTURAL FORCES STRUCTURAL MEMBERS

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