Suspension Bridges Suspension Bridges Efficient Structure bc Suspension Bridges Efficient Structure bc Most members in Tension Main Cable in Tension Suspenders in Tension Suspension Bridges Efficient Structure bc ID: 771414
Download Presentation The PPT/PDF document "Suspension Bridges Suspension Bridges" is the property of its rightful owner. Permission is granted to download and print the materials on this web site for personal, non-commercial use only, and to display it on your personal computer provided you do not modify the materials and that you retain all copyright notices contained in the materials. By downloading content from our website, you accept the terms of this agreement.
Suspension Bridges
Suspension Bridges Efficient Structure b/c:
Suspension Bridges Efficient Structure b/c: Most members in Tension Main Cable in Tension Suspenders in Tension
Suspension Bridges Efficient Structure b/c: Most members in Tension Few members in Compression
Suspension Bridges Efficient Structure b/c: Most members in Tension Few members in Compression Few members in Bending There are no bending members in this view
Suspension Bridges Bending Member: Girder Spans Between Suspender Ropes
Girder Fill Beams
Girder Fill Beams
Suspension Bridges Bending Member: Girder Spans Between Suspender Ropes
Suspension Bridges Bending Member: Girder Spans Between Suspender Ropes
Suspension Bridges Other Characteristics
Suspension Bridges Other Characteristics: Main Cable in Tension Suspenders in Tension
Suspension Bridges Other Characteristics: Demands HUGE Anchorage (Dead Weight) Main Cable in Tension Suspenders in Tension
Suspension Bridges Other Characteristics: Demands HUGE Anchorage (Dead Weight) Main Cable in Tension Suspenders in Tension W W
Suspension Bridges Other Characteristics: Demands HUGE Anchorage (Dead Weight) (Sliding Resistance Must Exceed Cable Force) Main Cable in Tension Suspenders in Tension W W N N f f
Other Characteristics The Suspended Structure is Unstable
Other Characteristics The Suspended Structure is Unstable Stiffening trusses needed for stability and lateral stiffness
Other Characteristics Otherwise…. Stiffening trusses needed for stability and lateral stiffness
Example 1: The Brooklyn Bridge, Determine Main Cable W Using Statics
Example 1: The Brooklyn Bridge, Determine Main Cable W Using Statics 2L = 1600’ h = 160’ Given: w = 9 kip/ft
Example 1: The Brooklyn Bridge, Determine Main Cable W Using Statics 2L = 1600’ h = 160’ Also Given: Main Cable Ultimate Strength F u = 160 ksi Cable A = 600 in 2 Given: w = 9 kip/ft
Example 1: The Brooklyn Bridge, Determine Main Cable W Using Statics 2L = 1600’ h = 160’ Also Given: Main Cable Ultimate Strength F u = 160 ksi Cable A = 600 in 2 Given: w = 9 kip/ft => P n = (160)(600) = 96000 kips