[Ths]2012 deter-indeter

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Lecture Number 1
Determinate and Indeterminate

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[Ths]2012 deter-indeter

  1. 1. STRUCTURAL ANALYSIS Definitions Concepts of Stability of 1 Structures Statically Determinate / 2 Indeterminate Structures Advantages & 3 disadvantages of indeterminate structures10/14/2011 Tharwat Sakr
  2. 2. STRUCTURES■ DefinitionStructure is defined as an assembly of connected parts(members) used to support loads.Buildings, bridges, tunnels, tanks and chimneys are example g , g , , y pstructures commonly encountered in practice. 10/14/2011 Tharwat Sakr
  3. 3. Civil Structures■ BUILDINGS 10/14/2011 Tharwat Sakr
  4. 4. Civil Structures■ BRIDGES 10/14/2011 Tharwat Sakr
  5. 5. Civil Structures■ LARGE HALLS 10/14/2011 Tharwat Sakr
  6. 6. Civil Structures■ STADIUMS 10/14/2011 Tharwat Sakr
  7. 7. Civil Structures■ WATER STRUCTURES 10/14/2011 Tharwat Sakr
  8. 8. Support Types■ Fixed Support pp Rx M Ry 10/14/2011 Tharwat Sakr
  9. 9. Support Types■ Hinged Support g pp Rx Ry 10/14/2011 Tharwat Sakr
  10. 10. Support Types■ Roller Support pp R R 10/14/2011 Tharwat Sakr
  11. 11. Statically Determinate / Indeterminate Structures■ CONDITIONS OF DETERMINATE STRUCTUREDeterminate if No. of Equilibrium Equations = No. of unknowns 2D Beams 3 + c r 2D Frames 3j + c r + 3m 2D Trusses 2j r + m 3D Beams 6 + c r 3D F Frames 6j + c r + 6 6m 3D Trusses 3j r + m 10/14/2011 Tharwat Sakr
  12. 12. Statically Determinate / Indeterminate Structures■ BEAM STRUCTURE2D Beams 3 + c > r Unstable 3 + c = r Determinate 3 + c < r Indeterminate 10/14/2011 Tharwat Sakr
  13. 13. Statically Determinate / Indeterminate Structures■ FRAME STRUCTURE2D Frames 3j + c > 3m + r Unstable 3j + c = 3m + r Determinate 3j + c < 3m + r Indeterminate 10/14/2011 Tharwat Sakr
  14. 14. Statically Determinate / Indeterminate Structures■ TRUSS STRUCTURE2D Trusses 2j > m+r Unstable 2j = m+r Determinate 2j < m+r Indeterminate 10/14/2011 Tharwat Sakr
  15. 15. Statically Determinate / Indeterminate Structures■ EXAMPLE FRAMES Fra M R J C 3M 3J Class. M R J C 3M 3J Class. me +R +C +R +C A 3 6 4 - 15 12 Indet. 3 B 4 4 5 - 16 15 Indet 1 10/14/2011 Tharwat Sakr
  16. 16. Statically Determinate / Indeterminate Structures■ EXAMPLE FRAMES M R J C 3M 3J+ Class. M R J C 3M 3J Class. +R C +R +CD 10 9 9 - 39 27 Indet 12 E 6 3 6 4 21 22 Unst. 10/14/2011 Tharwat Sakr
  17. 17. Statically Determinate / Indeterminate Structures■ EXAMPLE FRAMES Fra M R J C 3M 3J Class. Fra M R J C 3M 3J Class. me +R +C me +R +C F 8 6 9 3 30 30 Det. G 7 6 7 - 27 21 Indet. 6 10/14/2011 Tharwat Sakr
  18. 18. Statically Determinate / Indeterminate Structures■ TRUSSES M R J M+R 2J Class. M R J M 2J Class. + 25 3 14 28 28 Det. R 33 3 18 36 36 Unst. Unst (Parallel reactons) 10/14/2011 Tharwat Sakr
  19. 19. Statically Determinate / Indeterminate Structures■ TRUSSES M R J M 2J Class. M R J M 2J Class. + + R R 27 4 15 31 30 Indeterminate 1 16 3 10 19 20 Unstable 10/14/2011 Tharwat Sakr
  20. 20. Advantages / Disadvantages of Indeterminate Structures■ FORCES (ECONOMY) ( ) Determinate Indeterminate 20 10/14/2011 Tharwat Sakr
  21. 21. Advantages / Disadvantages of Indeterminate Structures■ DEFLECTIONS Determinate Indeterminate 4 1 10/14/2011 Tharwat Sakr
  22. 22. Advantages / Disadvantages of Indeterminate Structures■ REDUNDANCY Determinate Indeterminate 10/14/2011 Tharwat Sakr
  23. 23. Advantages / Disadvantages of Indeterminate Structures■ TEMPERATURE EFFECT Determinate Indeterminate 10/14/2011 Tharwat Sakr
  24. 24. Advantages / Disadvantages of Indeterminate Structures■ SUPPORT MOVEMENTS Determinate Indeterminate 10/14/2011 Tharwat Sakr
  25. 25. Problems10/14/2011 Tharwat Sakr
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