Locations and Tensioning of ASTM A354 Grade BD Rods and Bolts ASTM A354 Grade BD Rods and Bolts on the San Francisco-Oakland Bay Bridge Self Anchored Suspension Span Self Anchored Suspension Span W - PDF Document

Presentation Transcript

  1. Locations and Tensioning of ASTM A354 Grade BD Rods and Bolts on the San Francisco-Oakland Bay Bridge Self‐Anchored Suspension Span Locations and Tensioning of ASTM A354 Grade BD Rods and Bolts ASTM A354 Grade BD Rods and Bolts on the San Francisco-Oakland Bay Bridge Self Anchored Suspension Span Self Anchored Suspension Span W d Wednesday February 26, 2014 d F b 26 2014 Bob Brignano Transportation Engineer - Civil p Caltrans g

  2. Locations and Tensioning of ASTM A354 Grade BD Rods and Bolts on the San Francisco-Oakland Bay Bridge Self‐Anchored Suspension Span A354 Gr BD Rods & Bolts Rods & Bolts SAS 96 Rods 320 Rods 224 Rods 96 Rods 192 Rods 336 Rods 336 Rods 274 Rods 274 Rods 108 Rods 108 Rods 25 Rods 25 Rods 4 Rods 36 Rods 388 Rods 90 Rods 18 Rods 43 Rods 32 Rods 24 Rods 2/26/2014 SFOBB SAS Contract 04-0120F4 Slide 2

  3. Locations and Tensioning of ASTM A354 Grade BD Rods and Bolts on the San Francisco-Oakland Bay Bridge Self‐Anchored Suspension Span 17 l 17 locations/types with 2,306 rods/bolts • Rods and Bolts (with head) • 1” to 4” diameter • 2 inches to 32 feet long • 0.1 Fu to 0.7 Fu Tension (minimum specified ultimate tensile strength) (minimum specified ultimate tensile strength) • Cut and Rolled Threads ti /t ith 2 306 d /b lt 2/26/2014 SFOBB SAS Contract 04-0120F4 Slide 3

  4. Locations and Tensioning of ASTM A354 Grade BD Rods and Bolts on the San Francisco-Oakland Bay Bridge Self‐Anchored Suspension Span 1. E2 Shear Key - Connect to Concrete - Above Column, Under OBG [S1, S2] y 2. E2 Shear Key - Connect to Concrete - Above Bent Cap, Under Crossbeam [S3, S4] E2 Bearing - Connect to Concrete - Under OBG [B1, B2, B3, B4] 3. E2 Shear Key - Connect to OBG [S1, S2] & Connect to Crossbeam [S3, S4] 4. E2 Bearing - Connect to OBG [B1, B2, B3, B4] g 5. E2 Bearing Assembly Bolts (Spherical Bushing Halves) 6. E2 Bearing Assembly Bolts (Retaining Rings) [ ] 2/26/2014 SFOBB SAS Contract 04-0120F4 Slide 4

  5. Locations and Tensioning of ASTM A354 Grade BD Rods and Bolts on the San Francisco-Oakland Bay Bridge Self‐Anchored Suspension Span 1 E2 Shear Key - Connect to Concrete - Above Column Under OBG [S1 S2] 1. E2 Shear Key Connect to Concrete Above Column, Under OBG [S1, S2] 96 Rods, 3” Diameter, Cut Threads, Tensioned to 0.70 Fu, “2008 Rods”, rods cast in concrete in 2008 but could not tension until 2013 after compression of deck from cable load transfer operation, 32 of 96 rods broke, tension lowered, and then rods replaced by Saddle Design 2/26/2014 SFOBB SAS Contract 04-0120F4 Slide 5

  6. Locations and Tensioning of ASTM A354 Grade BD Rods and Bolts on the San Francisco-Oakland Bay Bridge Self‐Anchored Suspension Span 2 E2 Shear Key - Connect to Concrete - Above Bent Cap Under Crossbeam [S3 S4] 2. E2 Shear Key - Connect to Concrete - Above Bent Cap, Under Crossbeam [S3, S4] E2 Bearing - Connect to Concrete - Under OBG [B1, B2, B3, B4] 192 Rods, 3” Diameter, Cut Threads, Tensioned to 0.70 Fu, “2010 Rods”, manufactured differently than “2008 Rods” – vacuum degassed and MT inspected y g p 2/26/2014 SFOBB SAS Contract 04-0120F4 Slide 6

  7. Locations and Tensioning of ASTM A354 Grade BD Rods and Bolts on the San Francisco-Oakland Bay Bridge Self‐Anchored Suspension Span 3 E2 Shear Key - Connect to OBG [S1 S2] 3. E2 Shear Key - Connect to OBG [S1, S2] E2 Shear Key - Connect to Crossbeam [S3, S4] 320 Rods, 3” Diameter, Cut Threads, Fully Threaded, Tensioned to 0.70 Fu, Same Heat (material fabrication) as “2010 Rods” Same Heat (material fabrication) as 2010 Rods 2/26/2014 SFOBB SAS Contract 04-0120F4 Slide 7

  8. Locations and Tensioning of ASTM A354 Grade BD Rods and Bolts on the San Francisco-Oakland Bay Bridge Self‐Anchored Suspension Span 4 E2 Bearing Connect to OBG [B1 B2 B3 B4] 4. E2 Bearing - Connect to OBG [B1, B2, B3, B4] 224 Rods, 2” Diameter, Rolled Threads, Fully Threaded, Tensioned to 0.70 Fu 2/26/2014 SFOBB SAS Contract 04-0120F4 Slide 8

  9. Locations and Tensioning of ASTM A354 Grade BD Rods and Bolts on the San Francisco-Oakland Bay Bridge Self‐Anchored Suspension Span 5 E2 Bearing Assembly Bolts (Spherical Bushing Halves) 5. E2 Bearing Assembly Bolts (Spherical Bushing Halves) 96 Rods, 1” Diameter, Cut Threads, Tensioned to 0.7 Fy = 0.61 Fu, ASTM A143 IHE Test (48-hr. ASTM F606 wedge tensile test) Performed, Material Only Exposed in Shop Environment 2/26/2014 SFOBB SAS Contract 04-0120F4 Slide 9

  10. Locations and Tensioning of ASTM A354 Grade BD Rods and Bolts on the San Francisco-Oakland Bay Bridge Self‐Anchored Suspension Span 6 E2 Bearing Assembly Bolts (Retaining Rings) 6. E2 Bearing Assembly Bolts (Retaining Rings) 336 Socket Head Cap Screws, 1” Diameter, Cut Threads, Tightened to Snug + ¼ turn ~ 0.4 Fu, Mechanically Galvanized (not Hot Dip Galvanized) 2/26/2014 SFOBB SAS Contract 04-0120F4 Slide 10

  11. Locations and Tensioning of ASTM A354 Grade BD Rods and Bolts on the San Francisco-Oakland Bay Bridge Self‐Anchored Suspension Span 7 PWS Anchor Rods - PWS Socket to Anchorage 7. PWS Anchor Rods PWS Socket to Anchorage 2/26/2014 SFOBB SAS Contract 04-0120F4 Slide 11

  12. Locations and Tensioning of ASTM A354 Grade BD Rods and Bolts on the San Francisco-Oakland Bay Bridge Self‐Anchored Suspension Span 7. PWS Anchor Rods - PWS Socket to Anchorage S c o ods 274 Rods, 3½” Diameter, 20% Rods with Cut Threads & 80% Rods with Rolled Threads; installation involved only enough tension to align cable strands, then eventually reached 0.32 Fu Sustained load at bridge opening, and peak load of 0.35 Fu from Seismic; Dehumidified (<40% RH) S Soc et to c o age 2/26/2014 SFOBB SAS Contract 04-0120F4 Slide 12

  13. Locations and Tensioning of ASTM A354 Grade BD Rods and Bolts on the San Francisco-Oakland Bay Bridge Self‐Anchored Suspension Span 8 8. Tower Saddle Tie Rods 9. Turned Rods at Tower Saddle Segment Splices 10. Tower Saddle to Grillage Anchor Bolts 11. Tower Outrigger Boom (for Maintenance) at Top of Tower Tower Saddle Tie Rods 2/26/2014 SFOBB SAS Contract 04-0120F4 Slide 13

  14. Locations and Tensioning of ASTM A354 Grade BD Rods and Bolts on the San Francisco-Oakland Bay Bridge Self‐Anchored Suspension Span 8. Tower Saddle Tie Rods 8 o e Sadd e 25 Rods, 4” Diameter, Rolled Threads, Fully Threaded, Tensioned to 0.5 Fy = 0.41 Fu, then reach 0.68 Fu Sustained load at bridge opening, Dehumidified (<40% RH) e ods 2/26/2014 SFOBB SAS Contract 04-0120F4 Slide 14

  15. Locations and Tensioning of ASTM A354 Grade BD Rods and Bolts on the San Francisco-Oakland Bay Bridge Self‐Anchored Suspension Span 9 Turned Rods at Tower Saddle Segment Splices 9. Turned Rods at Tower Saddle Segment Splices 108 Rods, 3” Diameter at Threads with 3-1/16” Diameter Shank, Cut Threads, 100 Rods Tensioned to 0.45 Fu & 8 Rods Snug Tightened to ~0.1 Fu (no tensioning access), 8 Rods have slightly larger shanks with tighter tolerances to be alignment pins and came g y g g from same heat as the tower saddle tie rods, Dehumidified (<40% RH) g p 2/26/2014 SFOBB SAS Contract 04-0120F4 Slide 15

  16. Locations and Tensioning of ASTM A354 Grade BD Rods and Bolts on the San Francisco-Oakland Bay Bridge Self‐Anchored Suspension Span 10 Tower Saddle to Grillage Anchor Bolts 10. Tower Saddle to Grillage Anchor Bolts 90 Hex Head Bolts, 3” Diameter, Cut Threads, Snug Tightened to ~0.1 Fu, Partially Dehumidified (heads in <40% RH dehumidified Tower Head, nuts inside non-dehumidified Tower Grillage) 2/26/2014 SFOBB SAS Contract 04-0120F4 Slide 16

  17. Locations and Tensioning of ASTM A354 Grade BD Rods and Bolts on the San Francisco-Oakland Bay Bridge Self‐Anchored Suspension Span 11 Tower Outrigger Boom (for Maintenance) at Top of Tower 11. Tower Outrigger Boom (for Maintenance) at Top of Tower 4 Hex Head Bolts, 3” Diameter, Cut Threads, 2 Snug Tightened to ~0.1 Fu and 2 currently under no tension and will be Snug Tightened to ~0.1 Fu in the future when swing out maintenance boom 2/26/2014 SFOBB SAS Contract 04-0120F4 Slide 17

  18. Locations and Tensioning of ASTM A354 Grade BD Rods and Bolts on the San Francisco-Oakland Bay Bridge Self‐Anchored Suspension Span 12 Tower Anchor Rods - Tower at Footing (3" Dia) 12. Tower Anchor Rods Tower at Footing (3 Dia) 13. Tower Anchor Rods - Tower at Footing (4" Dia) 2/26/2014 SFOBB SAS Contract 04-0120F4 Slide 18

  19. Locations and Tensioning of ASTM A354 Grade BD Rods and Bolts on the San Francisco-Oakland Bay Bridge Self‐Anchored Suspension Span 12. Tower Anchor Rods - Tower at Footing (3" Dia), 388 Rods, Tensioned to 0.48 Fu g ( 13. Tower Anchor Rods - Tower at Footing (4" Dia), 36 Rods, Tensioned to 0.37 Fu Manufactured by Vulcan Threaded Products, Cut Threads, Partially Dehumidified (top in <40% RH dehumidified Tower Skirt, bottom in grout & concrete inside steel footing box) ), , 2/26/2014 SFOBB SAS Contract 04-0120F4 Slide 19

  20. Locations and Tensioning of ASTM A354 Grade BD Rods and Bolts on the San Francisco-Oakland Bay Bridge Self‐Anchored Suspension Span 14 East Saddle Anchor Rods 14. East Saddle Anchor Rods 15. East Saddle Tie Rods 2/26/2014 SFOBB SAS Contract 04-0120F4 Slide 20

  21. Locations and Tensioning of ASTM A354 Grade BD Rods and Bolts on the San Francisco-Oakland Bay Bridge Self‐Anchored Suspension Span 14 East Saddle Anchor Rods 14. East Saddle Anchor Rods 36 Rods, 2” Diameter, Cut Threads, Snug Tightened to ~0.1 Fu, Dehumidified (<40% RH) 2/26/2014 SFOBB SAS Contract 04-0120F4 Slide 21

  22. Locations and Tensioning of ASTM A354 Grade BD Rods and Bolts on the San Francisco-Oakland Bay Bridge Self‐Anchored Suspension Span 15. East Saddle Tie Rods 5 ast Sadd e 18 Hex Head Bolts, 3” Diameter, Cut Threads, Snug Tightened to ~0.1 Fu, then reach 0.2 Fu as load bridge, Dehumidified (<40% RH) e ods 2/26/2014 SFOBB SAS Contract 04-0120F4 Slide 22

  23. Locations and Tensioning of ASTM A354 Grade BD Rods and Bolts on the San Francisco-Oakland Bay Bridge Self‐Anchored Suspension Span 16 B14 Cable Bands - Cable Brackets (East End) - Strongback Anchor Rods 16. B14 Cable Bands Cable Brackets (East End) Strongback Anchor Rods 2/26/2014 SFOBB SAS Contract 04-0120F4 Slide 23

  24. Locations and Tensioning of ASTM A354 Grade BD Rods and Bolts on the San Francisco-Oakland Bay Bridge Self‐Anchored Suspension Span 16 B14 Cable Bands Cable Brackets (East End) Strongback Anchor Rods 16. B14 Cable Bands - Cable Brackets (East End) - Strongback Anchor Rods 24 Rods, 3” Diameter, Rolled Threads, Tensioned to 0.16 Fu, Pre-Compress Neoprene, Machined Down from Extra 3½” Diameter PWS Anchor Rods Material 2/26/2014 SFOBB SAS Contract 04-0120F4 Slide 24

  25. Locations and Tensioning of ASTM A354 Grade BD Rods and Bolts on the San Francisco-Oakland Bay Bridge Self‐Anchored Suspension Span 17 W2 Bikepath Anchor Rods 17. W2 Bikepath Anchor Rods 2/26/2014 SFOBB SAS Contract 04-0120F4 Slide 25

  26. Locations and Tensioning of ASTM A354 Grade BD Rods and Bolts on the San Francisco-Oakland Bay Bridge Self‐Anchored Suspension Span 17. W2 Bikepath Anchor Rods epat 43 Rods, Metric M30 (~1-1/4”), an architectural enhancement to the bikepath results in redesigned connections that abandon these rod c o ods 2/26/2014 SFOBB SAS Contract 04-0120F4 Slide 26

  27. Locations and Tensioning of ASTM A354 Grade BD Rods and Bolts on the San Francisco-Oakland Bay Bridge Self‐Anchored Suspension Span 17 locations/types with 2,306 rods/bolts 2/26/2014 SFOBB SAS Contract 04-0120F4 Slide 27

  28. Locations and Tensioning of ASTM A354 Grade BD Rods and Bolts on the San Francisco-Oakland Bay Bridge Self‐Anchored Suspension Span 2/26/2014 SFOBB SAS Contract 04-0120F4 Slide 28