Structure treillis

1,253 views
977 views

Published on

Published in: Technology
0 Comments
1 Like
Statistics
Notes
  • Be the first to comment

No Downloads
Views
Total views
1,253
On SlideShare
0
From Embeds
0
Number of Embeds
2
Actions
Shares
0
Downloads
60
Comments
0
Likes
1
Embeds 0
No embeds

No notes for slide

Structure treillis

  1. 1. STRUCTURE TREILLISSTRUCTURE TREILLISARCHITECTURE & GENIECIVIL
  2. 2.  Ohio River Bridge. Typical cantilever and suspended span bridge, showing thetruss geometry in the end span and cantilevered portion of the main span.(Madison, Indiana) STRUCTURE TREILLIS
  3. 3.  Modern parallel-chord truss consisting of three square panels cantilevered fromthe left end. Made of flexible spines, all joints rigid. Single diagonal in eachpanel. STRUCTURE TREILLIS
  4. 4.  Effect of vertical upward end load. Compression members can be seen by theirtendency to buckle. Long diagonals in tension, short verticals in compressiondue to shear direction. Truss buckles as a system due to rigid joints and jointrotation. STRUCTURE TREILLIS
  5. 5.  Effect of vertical downward end load. Lower buckling load as due to thedirection of shear the long diagonals are now in compression and shorterverticals in tension. Lower chord also in compression. Again truss buckles as acomplete system. STRUCTURE TREILLIS
  6. 6.  Simple Pratt truss in exhibition hall. Direction of diagonals such thatall are in tension due to a UD load on the truss. (Las Vegas, Nevada) STRUCTURE TREILLIS
  7. 7.  Detail of pin-jointed truss connection, approach span to San Francisco-OaklandBay Bridge. Pin joints are used in older bridges or situations where rotation hasto be allowed for due to settlement, or for construction purposes. (San FranciscoBay Area) STRUCTURE TREILLIS
  8. 8.  Crumlin Viaduct. Designed by Brunel (1806-59), this early railway viaduct isinteresting in that it is constructed entirely from pin-connected iron members.(Ebbw Vale, Wales) STRUCTURE TREILLIS
  9. 9.  Lift bridge, Sacramento River Delta. This simple bridge is used to introducemany aspects of truss bridge design. Details are shown in GoddenD9-D17. AWarren truss with verticals is used throughout. Lift span is simply supported.The double spans on each side are determinate due to internal pins. (Near RioVista, California) STRUCTURE TREILLIS
  10. 10.  Lift bridge, Sacramento River Delta. Lift span shown partially raised. Note thecounterweights that balance the lift span have dropped to the mid-height of thetowers. (Near Rio Vista, California) STRUCTURE TREILLIS
  11. 11.  Close-up of the towers. In a direction parallel with the bridge axis the bracingconsists of a Warren truss, and in the other direction it is a K-truss. (Near RioVista, California) STRUCTURE TREILLIS
  12. 12.  Ohio River Bridge. Typical cantilever and suspended span bridge, showing thetruss geometry in the end span and cantilevered portion of the main span.(Madison, Indiana) STRUCTURE TREILLIS
  13. 13.  Ohio River Bridge. Typical cantilever and suspended span bridge, showing thetruss geometry in the end span and cantilevered portion of the main span.(Madison, Indiana) STRUCTURE TREILLIS
  14. 14.  Ohio River Bridge. Typical cantilever and suspended span bridge, showing thetruss geometry in the end span and cantilevered portion of the main span.(Madison, Indiana) STRUCTURE TREILLIS
  15. 15.  Ohio River Bridge. Typical cantilever and suspended span bridge, showing thetruss geometry in the end span and cantilevered portion of the main span.(Madison, Indiana) STRUCTURE TREILLIS
  16. 16.  Ohio River Bridge. Typical cantilever and suspended span bridge, showing thetruss geometry in the end span and cantilevered portion of the main span.(Madison, Indiana) STRUCTURE TREILLIS

×