The Longest Bridges in the World…. The Longest Bridges in the World. Have something in common. Suspension Bridges. Suspension Bridges. Efficient Structure b/c:. Suspension Bridges. Efficient Structure b/c:. ID: 727335
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The Longest Bridges in the World...
Slide2The Longest Bridges in the World…
Slide3The Longest Bridges in the World
Have something in common
Slide4Suspension Bridges
Slide5Suspension Bridges
Efficient Structure b/c:
Slide6Suspension Bridges
Efficient Structure b/c:
Most members in Tension
Main Cable in Tension
Suspenders in Tension
Slide7Suspension Bridges
Efficient Structure b/c:
Most members in TensionFew members in Compression
Slide8Suspension Bridges
Efficient Structure b/c:
Most members in TensionFew members in CompressionFew members in Bending
There are no bending
members in this view
Slide9Suspension Bridges
Bending Member:
Girder Spans Between
Suspender Ropes
Slide10Girder
Fill Beams
Slide11Girder
Fill Beams
Slide12Suspension Bridges
Bending Member:
Girder Spans Between
Suspender Ropes
Slide13Suspension Bridges
Bending Member:
Girder Spans Between
Suspender Ropes
Slide14Suspension Bridges
Other Characteristics
Slide15Suspension Bridges
Other Characteristics:
Main Cable in Tension
Suspenders in Tension
Slide16Suspension Bridges
Other Characteristics:
Demands HUGE Anchorage (Dead Weight)
Main Cable in Tension
Suspenders in Tension
Slide17Suspension Bridges
Other Characteristics:
Demands HUGE Anchorage (Dead Weight)
Main Cable in Tension
Suspenders in Tension
W
W
Slide18Suspension 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
Slide19Other Characteristics
The Suspended Structure is Unstable
Slide20Other Characteristics
The Suspended Structure is Unstable
Stiffening trusses needed for stability and lateral stiffness
Slide21Other Characteristics
Otherwise….
Stiffening trusses needed for stability and lateral stiffness
Slide22Example
2:
The Brooklyn Bridge, Determine Main Cable Force Using Statics
Slide23Example 2: The Brooklyn Bridge, Determine Main Cable Force Using Statics
2L = 1600’
h = 160’
Given:
w
=
9 kip/ft
Slide24Slide25Today's Top Docs
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