Transcript Permitting Long Key Bridge V-Pier Replacements - Tom Beitelman

Thomas Beitelman, MS PE SI
Florida Department of Transportation
State Bridge Evaluation Engineer
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13 Axles
16’-10” Wide
135’-0” Long
218,000 lbs
328 Roadway
Miles
•Route starts in Tampa
•Ends at Long Key Bridge
•Dozens of routes were evaluated
•Rejection - Dimensional
•Rejection – Overloaded structures
•Rejection – Construction,
coordination, etc.
•Eventually – Approved route
START
900098
END
•Oops! Last minute construction
•Oops! Bridge over Channel #5
900098
END
•900098 Over Channel Five
•“Problem” Structure
•Segmental Box
•Low Operating Rating
•Bridge would be 60% over
loaded
•Hauler had received prior
approval
•Options:
1 – Barge….not well received
2 – In-depth Engineering review
Local shear and moments
Wheel positions
•Factors in our favor:
1 – Segmental Box Girder internal strength
2 – Load testing performed by FDOT
Typical 3D Influence Surface - 84" Cantilever Wing
1000
00
42
-1000
84
-2000
-3000
-4000
126
168
210
252
294
336
24"
378
84"
-2500
180
144
162
180
198
126
108
90
72
54
36
18
3600
330
240
270
300
-2000
210
-1500
60
90
120
-1000
150
-500
30
0
Influence Coefficient
Typical 3D Influence Surface - Slab Between Webs
500
0
•Based on FDOT lab test
•Joints would not open
•Joints would not be over-stressed
•Based on In-Depth Analysis
•“Crawl” vehicle over the bridge (zero impact)
•Precise positioning of wheels (optimum stresses)
•10% under the maximum