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Redundancy of Steel Twin Tub Girder Bridges: The Marquette ...

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Demand vs Supply from Continuity<br />

Lane Loading vs Truck Loading<br />

Mdeemand<br />

/ MLL orr<br />

Mdesign/MLLL<br />

10<br />

9<br />

8<br />

7<br />

6<br />

5<br />

4<br />

3<br />

2<br />

1<br />

Supply vs Demand at Fracture<br />

0<br />

0.25 0.3 0.35 0.4 0.45 0.5 0.55 0.6 0.65 0.7<br />

MDL/MLL<br />

Lane Loading Controls<br />

Design at over 100’<br />

MDEMAND/MLL<br />

MDESIGN/MLL<br />

MDesign/MLL (U/designed)<br />

Mdesign/MLL (More Lanes)<br />

Mdesign/MLL (Lane Load vs<br />

Truck)<br />

<strong>Redundancy</strong> <strong>of</strong> <strong>Steel</strong> <strong>Twin</strong> <strong>Tub</strong> <strong>Girder</strong> <strong>Bridges</strong>: <strong>The</strong> <strong>Marquette</strong> Interchange Approach

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