Dissertation Presentation

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Dissertation Presentation

  1. 1. A WEB-BASED TUTORIAL SYSTEM FOR EUROCODE<br />STRUCTURAL FIRE ENGINEERING<br />Dissertation by<br />ANUJ RAMDAS<br />Supervised by<br />Prof. IAN BURGESS<br />
  2. 2. A WEB-BASED TUTORIAL SYSTEM FOR EUROCODE<br />STRUCTURAL FIRE ENGINEERING<br />INTRODUCTION<br /><ul><li>The possibility of an outbreak of fire in a building can never be neglected
  3. 3. Protection of all external steel members would be a costly affair
  4. 4. To assess whether fire protection is required on the external structural steel elements of the building or if they can remain unclad
  5. 5. Performance depending upon the position of the member with respect to the windows</li></li></ul><li>A WEB-BASED TUTORIAL SYSTEM FOR EUROCODE<br />STRUCTURAL FIRE ENGINEERING<br />INTRODUCTION<br />External steelwork of Hotel de lasArtes, Barcelona<br />
  6. 6. A WEB-BASED TUTORIAL SYSTEM FOR EUROCODE<br />STRUCTURAL FIRE ENGINEERING<br />AIMS<br /><ul><li>Increase the performance of external steel structures against fire
  7. 7. Develop a web-browser-based tutorial interface</li></li></ul><li>A WEB-BASED TUTORIAL SYSTEM FOR EUROCODE<br />STRUCTURAL FIRE ENGINEERING<br />OBJECTIVES<br />Understand behaviour of fire and various other mechanisms that govern heat transfer.<br />Fire engineering theory and its design.<br />To examine the fire design approach for external steel work based on BS EN 1991-1-2:2002 and BS EN 1993-1-2:2005.<br />Understand Adobe Dreamweaver CS4 and Adobe Fireworks CS4 software to develop the online external steelwork tutorial.<br />
  8. 8. A WEB-BASED TUTORIAL SYSTEM FOR EUROCODE<br />STRUCTURAL FIRE ENGINEERING<br />HEAT TRANSFER MODEL<br />
  9. 9. A WEB-BASED TUTORIAL SYSTEM FOR EUROCODE<br />STRUCTURAL FIRE ENGINEERING<br />HEAT TRANSFER<br />Main source of heat transfer <br />Convection and Radiation<br />Highest temperature on the external steel members are at points near to the window top.<br />Department of Civil and Structural Engineering<br />
  10. 10. A WEB-BASED TUTORIAL SYSTEM FOR EUROCODE<br />STRUCTURAL FIRE ENGINEERING<br />HEAT TRANSFER<br /><ul><li>Heat Transfer to column not engulfed in flame
  11. 11. No forced draught</li></ul>column opposite window<br />column to side of window<br /><ul><li> Forced draught</li></ul>column opposite window<br /> column to side of window<br />Department of Civil and Structural Engineering<br />
  12. 12. A WEB-BASED TUTORIAL SYSTEM FOR EUROCODE<br />STRUCTURAL FIRE ENGINEERING<br />HEAT TRANSFER<br /><ul><li>Heat Transfer to column engulfed in flame
  13. 13. No forced draught
  14. 14. Forced draught
  15. 15. Engulfed column with protection</li></ul>Department of Civil and Structural Engineering<br />
  16. 16. A WEB-BASED TUTORIAL SYSTEM FOR EUROCODE<br />STRUCTURAL FIRE ENGINEERING<br />HEAT TRANSFER<br /><ul><li>Heat Transfer to spandrel beam not engulfed in flame</li></ul>Department of Civil and Structural Engineering<br />
  17. 17. A WEB-BASED TUTORIAL SYSTEM FOR EUROCODE<br />STRUCTURAL FIRE ENGINEERING<br />HEAT TRANSFER<br /><ul><li>Heat Transfer to spandrel beam fully or partially engulfed in flame
  18. 18. No forced draught</li></ul>Flame height > beam depth<br /> Flame height < beam depth<br /><ul><li> Forced draught</li></ul>Department of Civil and Structural Engineering<br />
  19. 19. A WEB-BASED TUTORIAL SYSTEM FOR EUROCODE<br />STRUCTURAL FIRE ENGINEERING<br />ASSUMPTIONS<br /><ul><li>Confined to a single storey fire compartment.
  20. 20. All openings such as windows in the fire compartment are designed to be rectangular in shape.
  21. 21. Parameters such as compartment fire temperature, size and temperature of flames coming out of the window, convection and radiation characteristics as per EN 1991-1-2 Annex B.
  22. 22. Elements must be distinguished as member engulfed or not engulfed in flame depending on the relative position with respect to the openings
  23. 23. Radiative heat transfer is assumed for an element which is not engulfed with flame projecting out from the windows.</li></ul>Department of Civil and Structural Engineering<br />
  24. 24. A WEB-BASED TUTORIAL SYSTEM FOR EUROCODE<br />STRUCTURAL FIRE ENGINEERING<br />CALCULATION PROCEDURE<br /><ul><li>Calculate compartment parameters
  25. 25. Decide if through draught conditions apply or not
  26. 26. Calculate flame trajectory and the fire and flame temperatures
  27. 27. Draw sketches of the flame trajectory and steel position
  28. 28. Modify the flame shape for flame deflection by wind in the ‘no forced draught’ case
  29. 29. Calculate heat transfer to steel. </li></ul>Department of Civil and Structural Engineering<br />
  30. 30. A WEB-BASED TUTORIAL SYSTEM FOR EUROCODE<br />STRUCTURAL FIRE ENGINEERING<br />HEAT BALANCE EQUATIONS<br />Average steel temperature Tm [K] is found by iterative solution of <br />σ Tm4 + α Tm = Iz + If + 293α<br />Where,<br />σ Stefan Boltzmann constant taken as 56.7x10-12 kW/m2K4<br />α Coefficient for heat transfer by convection [kW/m2K]<br />IzHeat flux by radiation from the flames [kW/m2]<br />If Heat flux by radiation from the opening [kW/m2]<br />Member not engulfed in flame<br />Department of Civil and Structural Engineering<br />
  31. 31. A WEB-BASED TUTORIAL SYSTEM FOR EUROCODE<br />STRUCTURAL FIRE ENGINEERING<br />HEAT BALANCE EQUATIONS<br />Average steel temperature Tm [K] is found by iterative solution of<br />σ Tm4 + α Tm = Iz + If + α Tz<br />Where,<br />Tz Temperature of flame [K]<br />IzHeat flux by radiation from the flames [kW/m2]<br />If Heat flux by radiation from the opening [kW/m2]<br />Member engulfed in flame<br />Department of Civil and Structural Engineering<br />
  32. 32. A WEB-BASED TUTORIAL SYSTEM FOR EUROCODE<br />STRUCTURAL FIRE ENGINEERING<br />FAILURE CRITERIA<br />The critical ‘failure’ temperature <br /> Columns - 550⁰C<br /> Beams - 620⁰C<br />Has no consideration for load intensity imposed over the element<br />Department of Civil and Structural Engineering<br />
  33. 33. A WEB-BASED TUTORIAL SYSTEM FOR EUROCODE<br />STRUCTURAL FIRE ENGINEERING<br />FIRE TEST ON REAL STRUCTURES<br />Steel plate placed outside the fire compartment opening (Wald et al, 2009)<br />Testing of a three-storey steel frame building by Wald et al (2009), in order to explore and compare the structural behaviour in a fire compartment as stated by the Eurocode. <br />Department of Civil and Structural Engineering<br />
  34. 34. A WEB-BASED TUTORIAL SYSTEM FOR EUROCODE<br />STRUCTURAL FIRE ENGINEERING<br />FIRE TEST ON REAL STRUCTURES<br />Comparison of measured and calculated temperatures (Wald et al, 2009)<br />The test concluded with the confirmation that the temperature prediction within the fire compartment and beam by the Eurocode was of good quality. <br />Department of Civil and Structural Engineering<br />
  35. 35. A WEB-BASED TUTORIAL SYSTEM FOR EUROCODE<br />STRUCTURAL FIRE ENGINEERING<br />WEB BASED TUTORIAL<br />About Adobe Dreamweaver CS4 and Adobe Fireworks CS4<br />Department of Civil and Structural Engineering<br />
  36. 36. A WEB-BASED TUTORIAL SYSTEM FOR EUROCODE<br />STRUCTURAL FIRE ENGINEERING<br />WEB BASED TUTORIAL<br />Department of Civil and Structural Engineering<br />
  37. 37. A WEB-BASED TUTORIAL SYSTEM FOR EUROCODE<br />STRUCTURAL FIRE ENGINEERING<br />WEB BASED TUTORIAL<br />Department of Civil and Structural Engineering<br />
  38. 38. A WEB-BASED TUTORIAL SYSTEM FOR EUROCODE<br />STRUCTURAL FIRE ENGINEERING<br />CONCLUSION<br />The web based online tutorial has an advantage of having access to teaching material on click to any user varying from students to engineers. <br />The online web tutorial is equipped with PowerPoint presentations giving brief idea on the overall design of external steelwork. <br />Three worked examples have also been included in order to understand the application of Eurocode based equations into real life situations. <br />Department of Civil and Structural Engineering<br />
  39. 39. A WEB-BASED TUTORIAL SYSTEM FOR EUROCODE<br />STRUCTURAL FIRE ENGINEERING<br />THANK<br />YOU<br />Department of Civil and Structural Engineering<br />

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