ºÝºÝߣ

ºÝºÝߣShare a Scribd company logo

IABSE Keynote abridged.pptx

?Download as PPTX, PDF?
?
David Collings
David Collings

This is an abridged presentation of a keynote talk delivered at IABSE conference, Istanbul, April 2023. My involvement in proposals for cutting edge, innovative structures and the need to regularly keep up to date and relevant for teaching and research means I am constantly looking at what is happening with major bridges worldwide. This has led to some thoughts on the future of major long span bridges, and asking the question ¡®where next with long span bridges?¡¯ This keynote paper condenses some past data on suspension and cables stay bridges, current influential bridges, and relevant data on other similar or relevant types of structure to start to answer this question from a practical viewpoint. It reviews the materials we use and looks at some recently proposed spans, it then looks at theoretical limits to spans and the forms these give to develop an answer to the question from an academic point of view. The consideration of long span bridges would not be complete without examining the effects of aerodynamics so some data is outlined with likely limits for future bridges. New considerations such as sustainability and carbon footprints are also considered to attempt to answer the question.

1 of 61
Download to read offline
10 May 2023 ? Arcadis 2020 1 Dr David Collings ARCADIS University of Surrey
10 May 2023 ? Arcadis 2020 2 Where next with long span bridges? Dr David Collings ARCADIS University of Surrey
10 May 2023 ? Arcadis 2020 3 Where next with long span bridges? 1.Past & Current Bridge data 2.Other Structures 3.Proposed Bridges 4.Theoretical Data 5.Aerodynamic Data 6.Carbon Emissions 7.Summary & Discussion
1.Past & Current Data
Suspension bridges
10 May 2023 ? Arcadis 2020 6 Akashi Kaikyo Bridge 2005 1991m Ã÷ʯº£Ï¿´ó˜ò
10 May 2023 ? Arcadis 2020 7 1915?anakkale Bridge 2022 2023m Currently the longest bridge span in the world
The growth is not smooth but jumps up in steps and is related to: Technology, Failure, Affordability, Politics.
IABSE Keynote abridged.pptx
Cable stay bridges
10 May 2023 ? Arcadis 2020 11 Russky Bridge 2012 1104m
10 May 2023 ? Arcadis 2020 12 Changtai Yangtze Bridge 2021 1176m ³¤Ì©³¤½­´óÇÅ
10 May 2023 ? Arcadis 2020 13 Currently the longest cable stay bridge span
IABSE Keynote abridged.pptx
By 2100 cable stay and suspension bridges could be similar spans
10 May 2023 ? Arcadis 2020 16 Brooklyn Bridge 1883 486m Uses stays
10 May 2023 ? Arcadis 2020 17 Yavuz Sultan Selim Bridge 2016 1408m Uses stays
10 May 2023 ? Arcadis 2020 18 This hybrid cable stay-suspension form may be a possible way forward for increased spans.
10 May 2023 ? Arcadis 2020 19 Oakland Bay Bridge, 1933 3x700m Multi span bridges
? Arcadis 2015 Rion Antirion Bridge 2004 3x560m
? Arcadis 2015 Tai Zhou Bridge ̨ÖÝ´ó˜ò 2012 2x1080m
? Arcadis 2015 The multiple span bridges also show a possible direction for long span bridges.
10 May 2023 ? Arcadis 2020 23 2.Other Data
10 May 2023 ? Arcadis 2020 24 Skyline 721 Longest Footbridge
10 May 2023 ? Arcadis 2020 25 Jais Flight - the longest zipline at 2,83km
10 May 2023 ? Arcadis 2020 26 Ameralik Fjord Powerline, 5.4km span
10 May 2023 ? Arcadis 2020 27 These other cable structures indicate possible practical limits for long span bridges.
10 May 2023 ? Arcadis 2020 28 1915?anakkale Bridge Caisson
10 May 2023 ? Arcadis 2020 29 Changtai Bridge 45m ³¤Ì©³¤½­´óÇÅ 1915?anakkale Bridge 45m Akashi Kaikyo Bridge 60m Ã÷ʯº£Ï¿´ó˜ò Rion Antirion Bridge 65m Oakland Bay Bridge 74m Tai Zhou Bridge 76m ̨ÖÝ´ó˜ò Other Bridge Caissons
10 May 2023 ? Arcadis 2020 30 Troll A Platform 2014 300m
? Arcadis 2015 300m ¡­¡­¡­¡­. 800m¡­¡­.. 1400m ¡­¡­.. These deep-water structures show the depth possible for the foundations of long span bridges.
10 May 2023 ? Arcadis 2020 32 Burj Khalifa 830m ¹þÀï·¢Ëþ Towers
? Arcadis 2015 Buildings ¸ßËþ Bridges ÇÅËþ
? Arcadis 2015 These tower structures indicate possible practical limits for long span bridge towers.
? Arcadis 2015 3. Proposed Spans Ä⽨´óÇÅÁº
? Arcadis 2015 Zhang Gao ÕżҸ۴ó˜ò 2.3km span
10 May 2023 ? Arcadis 2020 37 Messina Straights 3.3km span Ä«Î÷Äú£Ï¿´ó˜ò
10 May 2023 ? Arcadis 2020 38 Vartdalsfjorden, Sulafjorden and Sognefjord Fjords 2.2 to 3.7km span
? Arcadis 2015 Caspian crossing multiple 1.75km spans Àﺣ´ó˜ò
? Arcadis 2015 These proposed bridges indicate possibilities for long span bridges in the next decades.
? Arcadis 2015 4.Theoretical Data ÀíÂÛÇÅÁº½á¹¹
? Arcadis 2015 Radial ¾¶Ïò½á¹¹ Cable stay бÀ­ÇÅ Suspension ÐüË÷ÇÅ
? Arcadis 2015 Theoretical span limits: Span to height ratio Radial 20km 2:1 Suspension 18km Tower height Cable stay 15km 10km !
? Arcadis 2015 There are many assumptions used in the theoretical calculations.
? Arcadis 2015 In practice many of the assumptions are not fully met which can significantly affect the optimum structural form and the span to height ratio.
Material quantities standard assumptions
? Arcadis 2015 Material quantities revised assumptions
? Arcadis 2015 The theoretical studies show possible directions and limits for long span bridges
? Arcadis 2015 5.Aerodynamic Data ¿ÕÆø¶¯Á¦Ñ§
? Arcadis 2015 Truss or Box? èì¼ÜÇÅ»¹ÊÇÏäÁºÇÅ£¿
? Arcadis 2015 Span to width ratio important Aerodynamically unstable Aerodynamically stable
10 May 2023 ? Arcadis 2020 52 The effects of aerodynamics and in particular the bridge width will remain a key influence on the future development of long span bridges.
? Arcadis 2015 6.Carbon Emissions Data ̼×ãÓ¡
? Arcadis 2015 54 Data for normal bridges
? Arcadis 2015 The carbon content of a bridge increases significantly as span increases. Data for long span bridges
? Arcadis 2015 The carbon content of major bridges is likely to be an important parameter for future bridges.
? Arcadis 2015 The hybrid cable stay-suspension form may be a possible way forward for increased spans. The multiple span bridges also show a possible direction for long span bridges. Truss or Box? In Summary
? Arcadis 2015 Other cable structures indicate possible practical limits for long span bridges. . Deep-water structures show the depth possible for the foundations of long span bridges. Tower structures indicate possible practical limits for long span bridges. The effects of aerodynamics and in particular the bridge width will remain a key influence on the future development of long span bridges. In Summary
? Arcadis 2015 Theoretical studies show possible directions and limits for long span bridges The carbon content of major bridges is likely to be an important parameter for future bridges. These proposed bridges indicate possibilities for long span bridges in the next decades. In Summary
10 May 2023 ? Arcadis 2020 60 My thoughts based on this data? Cable stay and Suspension bridges similar spans before 2100. Multi span bridges on deepwater foundations rather than extreme spans.
10 May 2023 ? Arcadis 2020 61 What are your thoughts?

More Related Content

IABSE Keynote abridged.pptx

  • 1. 10 May 2023 ? Arcadis 2020 1 Dr David Collings ARCADIS University of Surrey
  • 2. 10 May 2023 ? Arcadis 2020 2 Where next with long span bridges? Dr David Collings ARCADIS University of Surrey
  • 3. 10 May 2023 ? Arcadis 2020 3 Where next with long span bridges? 1.Past & Current Bridge data 2.Other Structures 3.Proposed Bridges 4.Theoretical Data 5.Aerodynamic Data 6.Carbon Emissions 7.Summary & Discussion
  • 6. 10 May 2023 ? Arcadis 2020 6 Akashi Kaikyo Bridge 2005 1991m Ã÷ʯº£Ï¿´ó˜ò
  • 7. 10 May 2023 ? Arcadis 2020 7 1915?anakkale Bridge 2022 2023m Currently the longest bridge span in the world
  • 8. The growth is not smooth but jumps up in steps and is related to: Technology, Failure, Affordability, Politics.
  • 11. 10 May 2023 ? Arcadis 2020 11 Russky Bridge 2012 1104m
  • 12. 10 May 2023 ? Arcadis 2020 12 Changtai Yangtze Bridge 2021 1176m ³¤Ì©³¤½­´óÇÅ
  • 13. 10 May 2023 ? Arcadis 2020 13 Currently the longest cable stay bridge span
  • 15. By 2100 cable stay and suspension bridges could be similar spans
  • 16. 10 May 2023 ? Arcadis 2020 16 Brooklyn Bridge 1883 486m Uses stays
  • 17. 10 May 2023 ? Arcadis 2020 17 Yavuz Sultan Selim Bridge 2016 1408m Uses stays
  • 18. 10 May 2023 ? Arcadis 2020 18 This hybrid cable stay-suspension form may be a possible way forward for increased spans.
  • 19. 10 May 2023 ? Arcadis 2020 19 Oakland Bay Bridge, 1933 3x700m Multi span bridges
  • 20. ? Arcadis 2015 Rion Antirion Bridge 2004 3x560m
  • 21. ? Arcadis 2015 Tai Zhou Bridge ̨ÖÝ´ó˜ò 2012 2x1080m
  • 22. ? Arcadis 2015 The multiple span bridges also show a possible direction for long span bridges.
  • 23. 10 May 2023 ? Arcadis 2020 23 2.Other Data
  • 24. 10 May 2023 ? Arcadis 2020 24 Skyline 721 Longest Footbridge
  • 25. 10 May 2023 ? Arcadis 2020 25 Jais Flight - the longest zipline at 2,83km
  • 26. 10 May 2023 ? Arcadis 2020 26 Ameralik Fjord Powerline, 5.4km span
  • 27. 10 May 2023 ? Arcadis 2020 27 These other cable structures indicate possible practical limits for long span bridges.
  • 28. 10 May 2023 ? Arcadis 2020 28 1915?anakkale Bridge Caisson
  • 29. 10 May 2023 ? Arcadis 2020 29 Changtai Bridge 45m ³¤Ì©³¤½­´óÇÅ 1915?anakkale Bridge 45m Akashi Kaikyo Bridge 60m Ã÷ʯº£Ï¿´ó˜ò Rion Antirion Bridge 65m Oakland Bay Bridge 74m Tai Zhou Bridge 76m ̨ÖÝ´ó˜ò Other Bridge Caissons
  • 30. 10 May 2023 ? Arcadis 2020 30 Troll A Platform 2014 300m
  • 31. ? Arcadis 2015 300m ¡­¡­¡­¡­. 800m¡­¡­.. 1400m ¡­¡­.. These deep-water structures show the depth possible for the foundations of long span bridges.
  • 32. 10 May 2023 ? Arcadis 2020 32 Burj Khalifa 830m ¹þÀï·¢Ëþ Towers
  • 33. ? Arcadis 2015 Buildings ¸ßËþ Bridges ÇÅËþ
  • 34. ? Arcadis 2015 These tower structures indicate possible practical limits for long span bridge towers.
  • 35. ? Arcadis 2015 3. Proposed Spans Ä⽨´óÇÅÁº
  • 36. ? Arcadis 2015 Zhang Gao ÕżҸ۴ó˜ò 2.3km span
  • 37. 10 May 2023 ? Arcadis 2020 37 Messina Straights 3.3km span Ä«Î÷Äú£Ï¿´ó˜ò
  • 38. 10 May 2023 ? Arcadis 2020 38 Vartdalsfjorden, Sulafjorden and Sognefjord Fjords 2.2 to 3.7km span
  • 39. ? Arcadis 2015 Caspian crossing multiple 1.75km spans Àﺣ´ó˜ò
  • 40. ? Arcadis 2015 These proposed bridges indicate possibilities for long span bridges in the next decades.
  • 41. ? Arcadis 2015 4.Theoretical Data ÀíÂÛÇÅÁº½á¹¹
  • 42. ? Arcadis 2015 Radial ¾¶Ïò½á¹¹ Cable stay бÀ­ÇÅ Suspension ÐüË÷ÇÅ
  • 43. ? Arcadis 2015 Theoretical span limits: Span to height ratio Radial 20km 2:1 Suspension 18km Tower height Cable stay 15km 10km !
  • 44. ? Arcadis 2015 There are many assumptions used in the theoretical calculations.
  • 45. ? Arcadis 2015 In practice many of the assumptions are not fully met which can significantly affect the optimum structural form and the span to height ratio.
  • 47. ? Arcadis 2015 Material quantities revised assumptions
  • 48. ? Arcadis 2015 The theoretical studies show possible directions and limits for long span bridges
  • 49. ? Arcadis 2015 5.Aerodynamic Data ¿ÕÆø¶¯Á¦Ñ§
  • 50. ? Arcadis 2015 Truss or Box? èì¼ÜÇÅ»¹ÊÇÏäÁºÇÅ£¿
  • 51. ? Arcadis 2015 Span to width ratio important Aerodynamically unstable Aerodynamically stable
  • 52. 10 May 2023 ? Arcadis 2020 52 The effects of aerodynamics and in particular the bridge width will remain a key influence on the future development of long span bridges.
  • 53. ? Arcadis 2015 6.Carbon Emissions Data ̼×ãÓ¡
  • 54. ? Arcadis 2015 54 Data for normal bridges
  • 55. ? Arcadis 2015 The carbon content of a bridge increases significantly as span increases. Data for long span bridges
  • 56. ? Arcadis 2015 The carbon content of major bridges is likely to be an important parameter for future bridges.
  • 57. ? Arcadis 2015 The hybrid cable stay-suspension form may be a possible way forward for increased spans. The multiple span bridges also show a possible direction for long span bridges. Truss or Box? In Summary
  • 58. ? Arcadis 2015 Other cable structures indicate possible practical limits for long span bridges. . Deep-water structures show the depth possible for the foundations of long span bridges. Tower structures indicate possible practical limits for long span bridges. The effects of aerodynamics and in particular the bridge width will remain a key influence on the future development of long span bridges. In Summary
  • 59. ? Arcadis 2015 Theoretical studies show possible directions and limits for long span bridges The carbon content of major bridges is likely to be an important parameter for future bridges. These proposed bridges indicate possibilities for long span bridges in the next decades. In Summary
  • 60. 10 May 2023 ? Arcadis 2020 60 My thoughts based on this data? Cable stay and Suspension bridges similar spans before 2100. Multi span bridges on deepwater foundations rather than extreme spans.
  • 61. 10 May 2023 ? Arcadis 2020 61 What are your thoughts?