manitoba infrastructure and transportation radbug - august 2014 water management and structures
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Manitoba Infrastructure and Transportation RADBUG - August 2014Water Management and Structures
Innovative Overload Permitting in ManitobaAllowing a 363 250 Kg (800,830 LB) G.V.M.
“Superload”
Presented by:Geoffrey C. Oramasionwu, M.Eng., P.Eng.
Manitoba Infrastructure and Transportation RADBUG - August 2014Water Management and Structures
Manitoba Infrastructure and Transportation RADBUG - August 2014Water Management and Structures
INTRODUCTION Increased demand to haul heavier loadsMany structures nearing the end of their Service LifeIncreasing number of overload permit applicationsMIT uses the AASHTO LRFD and LRFR Specifications for Design and Load RatingAASHTOware Bridge Rating Program uses a refined rating methodThis AASHTOWare Bridge Rating enabled MIT to review and approve a 363, 250 Kg (800830 LB) overload
Manitoba Infrastructure and Transportation RADBUG - August 2014Water Management and Structures
THREE TRANSFORMERS, EACH WEIGHED IN AT GVM =175,450 kg (386,800 lbs)
The Overload Permit
Manitoba Infrastructure and Transportation RADBUG - August 2014Water Management and Structures
• Two self propelled units• Dual 20-line hydraulic trailer units• 16 tires per axle• GVM = 363,250 kg (800,830 lbs)• Total length = 34 m (110ft Approx.)•Total height = 7.435 m (24ft)• Total width = 7.55 m (24.77ft)
Manitoba Infrastructure and Transportation RADBUG - August 2014Water Management and Structures
Water Management and Structures reviewed three different truck configurations and three different routes before approving the permit application.
ROUTE OPTIONS
Precast Prestressed Concrete I GirderDesigned and built id 1975 for AASHTO HS25 Truck Live LoadIn composite action with a 200 mm (8 in) reinforced concrete deckSeven simply supported spans. Span length = 36.576 m (120 ft)
Manitoba Infrastructure and Transportation RADBUG - August 2014Water Management and Structures
Red River Bridge
12 m (40 ft) Precast Pre stressed Concrete Channel Girder100 mm (4 in) thick asphalt overlay wearing surface Five simply supported spans. Span length = 11.8 m (38.74 ft)
Manitoba Infrastructure and Transportation RADBUG - August 2014Water Management and Structures
ST ADOLPHE COULEE BRIDGE
BRIDGE LOAD RATING Manitoba Infrastructure and Transportation RADBUG - August 2014Water Management and Structures
NUMBER OF AXLES = 20AXLE SPACING = 1.5 m
LONGITUDINAL CONFIGURATION DEFINITION
Manitoba Infrastructure and Transportation RADBUG - August 2014Water Management and Structures
TRANSVERSE CONFIGURATION OF A NON-STANDARD GAGE
8 WHEELS PER AXLEVARIABLE WHEEL SPACING
Manitoba Infrastructure and Transportation RADBUG - August 2014Water Management and Structures
LONGITUDINAL FOOTPRINT OF TRUCK
OUTPUT OF VEHICLE PLAN
Manitoba Infrastructure and Transportation RADBUG - August 2014Water Management and Structures
OUTPUT OF VEHICLE AXLE PLAN (AXLE 1)
Manitoba Infrastructure and Transportation RADBUG - August 2014Water Management and Structures
ACTUAL CROSS-SECTION OF THE BRIDGE
BRIDGE DECK IS MODELED AS SHELL ELEMENTS WITH MATERIAL PROPERTIES BEING THE SAME AS THE BRIDGE DECK
Manitoba Infrastructure and Transportation RADBUG - August 2014Water Management and Structures
FINITE ELEMENT MODELING
CORE ELEMENT DATA CREATED IN “BrRAT” BRIDGE WORKSPACE WERE EXPORTED TO THE STAAD ENGINESTAAD USES THE INFORMATION TO CREATE THE FINITE ELEMENT MODEL FOR THAT STRUCTUREDECK SLAB SHELL ELEMENTSBEAM INFINETELY STIFF MEMBERS
Manitoba Infrastructure and Transportation RADBUG - August 2014Water Management and Structures
A UNIT LOAD IS APPLIED AT EACH NODE OF THE SHELL ELEMENTS
Bending Moment, Shear Force and Displacement Envelopes are generated for the Unit Load placed on at each element nodes.
STAAD THREE DIMENTIONAL VIEW OF THE MODEL
Manitoba Infrastructure and Transportation RADBUG - August 2014Water Management and Structures
Manitoba Infrastructure and Transportation RADBUG - August 2014Water Management and Structures
Manitoba Infrastructure and Transportation RADBUG - August 2014Water Management and Structures
3D Stress Influence Surface for the unit Load Case No. 12, Placed at a Shell Node.
Manitoba Infrastructure and Transportation RADBUG - August 2014Water Management and Structures
Manitoba Infrastructure and Transportation RADBUG - August 2014Water Management and Structures
Manitoba Infrastructure and Transportation RADBUG - August 2014Water Management and Structures
STAAD THREE DIMENTIONAL VIEW OF THE MODEL
Manitoba Infrastructure and Transportation RADBUG - August 2014Water Management and Structures
3D Stress Influence Surface for the unit Load Case No. 6, Placed at a Shell Node.
Manitoba Infrastructure and Transportation RADBUG - August 2014Water Management and Structures
RED RIVER BRIDGE RATING FACTORS
GIRDER LIMIT STATE CHBDC
AASHTO STANDARD
Single/two or more Lanes
AASHTO LRFD Single/Multi-
Lanes
FINITE ELEMENT MODEL
1 Shear 0.614 0.390/0.390 0.468/0.429 0.131
Moment 0.567 0.390/0.390 0.468/0.429 0.131
2 Shear 0.614 0.98/1.24 0.633/0.731 0.207
Moment 0.525 0.98/1.24 0.436/0.622 0.207
3 Shear 0.614 0.98/1.24 0.633/0.731 0.221
Moment 0.525 0.98/1.24 0.436/0.622 0.221
4 Shear 0.614 0.98/1.24 0.633/0.731 0.231
Moment 0.525 0.98/1.24 0.436/0.622 0.231
5 Shear 0.614 0.85/0.85 0.582/0.619 0.223
Moment 0.567 0.85/0.85 0.582/0.619 0.223
Manitoba Infrastructure and Transportation RADBUG - August 2014Water Management and Structures
ST. ADOLPHE COULEE BRIDGE RATING FACTORS
GIRDER LIMIT STATE CHBDCAASHTO
STANDARD Single/two or more Lanes
AASHTO LRFD Single/Multi-
Lanes
FINITE ELEMENT MODEL
1 Shear 0.400 1.00/1.00 0.60/0.60 0.055Moment 0.339 1.00/1.00 0.60/0.60 0.055
2 Shear 0.400 0.56/0.72 0.60/0.60 0.172Moment 0.345 0.56/0.72 0.325/0.325 0.172
3 Shear 0.400 0.56/0.72 0.60/0.60 0.180Moment 0.345 0.56/0.72 0.325/0.325 0.180
4 Shear 0.400 0.56/0.72 0.60/0.60 0.089Moment 0.345 0.56/0.72 0.325/0.325 0.089
5 Shear 0.400 0.56/0.72 0.60/0.60 0.089Moment 0.345 0.56/0.72 0.325/.0325 0.089
6 Shear 0.400 0.56/0.72 0.60/0.60 0.180Moment 0.345 0.56/0.72 0.325/.0325 0.180
7 Shear 0.400 0.56/0.72 0.60/0.60 0.172Moment 0.345 0.56/0.72 0.325/.0325 0.172
8 Shear 0.400 1.00/1.00 0.60/0.60 0.055Moment 0.339 1.00/1.00 0.60/0.60 0.055
Manitoba Infrastructure and Transportation RADBUG - August 2014Water Management and Structures
CHBDC AASHTO Standard Sin-
gle Lane
AASHTO Standard
Multi Lane
AASHTO LRFD Single Lane
AASHTO LRFD Multi Lane
Finite Element Model
0
0.2
0.4
0.6
0.8
1
1.2
1.4
For Red River Bridge
Interior Girder Shear
Interior Girder Moment
Exterior Girder Shear
Exterior Girder Moment
Manitoba Infrastructure and Transportation RADBUG - August 2014Water Management and Structures
RATING FACTORS FROM DIFFERENT CODES
CHBDC AASHTO Standard Sin-
gle Lane
AASHTO Stan-dard Multi Lane
AASHTO LRFD Finite Element Model
0
0.2
0.4
0.6
0.8
1
1.2
St. Adolphe Coulee Bridge
Interior Girder ShearInterior Girder MomentExterior Girder ShearExterior Girder Moment
Manitoba Infrastructure and Transportation RADBUG - August 2014Water Management and Structures
RATING FACTORS FROM DIFFERENT CODES
LOAD RATING IS CARRIED OUT USING THE CONVENTIONAL BRIDGE RATING PROCEEDURES AS DESCRIBED EARIERIT CAN BE SEEN THAT THIS SUPERLOAD WOULD NOT HAVE BEEN APPROVED IF WE HAD USED THE CONVENTIONAL DISTRIBUTION FACTOR CALCULATION METHOD.
Manitoba Infrastructure and Transportation RADBUG - August 2014Water Management and Structures
RATING FACTORS FROM DIFFERENT CODES
Manitoba Hydro Transformers Nov 3/2012 8 scales linked together (KG) Nov 14/2012 separate weighing, 4 scales/side (KG) FEB 05/2013 separate weighing, 4 scales/side (KG)
axle drive side passenger side drive side passenger side Feb 05/20131 17,550 17,400 7,400 7,150 14,550 7950 7750 15,7002 16,750 17,400 7,450 7,350 14,800 7850 7850 15,7003 17,150 17,600 7,600 7,450 15,050 7900 7950 15,8504 17,600 18,000 7,600 7,300 14,900 7900 8050 15,9505 17,300 17,600 7,500 7,400 14,900 7800 8050 15,8506 17,900 18,400 7,400 7,300 14,700 8050 8150 16,2007 19,050 18,650 9,900 10,450 20,350 9400 9950 19,3508 18,900 18,600 9,800 10,250 20,050 9150 10000 19,1509 19,850 18,900 10,100 10,150 20,250 9250 10000 19,25010 18,800 18,650 10,050 10,200 20,250 8950 9800 18,75011 18,500 19,400 9,750 10,000 19,750 8900 9900 18,80012 18,700 18,900 9,900 9,800 19,700 8850 9750 18,60013 18,650 18,600 9,750 9,700 19,450 8900 9750 18,65014 17,950 19,050 9,850 9,600 19,450 8900 9800 18,70015 17,900 17,750 10,150 9,700 19,850 9050 9650 18,70016 16,250 17,900 9,050 9,150 18,200 9100 9550 18,65017 17,450 17,700 10,500 9,900 20,400 9150 9750 18,90018 17,600 17,550 8,850 9,400 18,250 8950 9500 18,45019 17,500 17,350 8,850 8,950 17,800 8900 9250 18,15020 15,500 17,000 10,500 10,100 20,600 8450 9200 17,650
total 356,850 362,400 181,950 181,300 363,250 total 173,350 183,650 357,000
* During the first weighing, the unit was on an angle, and the mover attempted to maintain levelness by adjusting hydraulics.** The second weighing was on a relatively flat surface, with no pitch adjustments.
0
5,000
10,000
15,000
20,000
25,000
0 5 10 15 20 25
AXL
E W
EIG
HT
AXLE NUMBER
MEASURED WEIGHT OF EACH AXLE
1 st* Nov 3/2012
2nd* Nov 3/2012
Non 14/2012
Feb 05/2013
PORTABLE SCALES
Manitoba Infrastructure and Transportation RADBUG - August 2014Water Management and Structures
WE ALSO NEEDED TO VERIFY THAT OUR MODEL IS CORRECT BY DOING SOME MEASUREMENTS DURING ONE OF MOVES.
RATING FACTORS FROM DIFFERENT CODES
Travel from 8:00 pm – 6:00 am 10 km/h maximum speed Traveling on centreline of bridge Police escort inside the city limits and Manitoba Compliance Officers for traffic control. Total move – three nights
Manitoba Infrastructure and Transportation RADBUG - August 2014Water Management and Structures
Permit Conditions
Instrumentation and Data Collection
Manitoba Infrastructure and Transportation RADBUG - August 2014Water Management and Structures
Instrumentation and Data Collection
Manitoba Infrastructure and Transportation RADBUG - August 2014Water Management and Structures
Manitoba Infrastructure and Transportation September 2013Water Management and Structures
Instrumentation and Data Collection
Manitoba Infrastructure and Transportation RADBUG - August 2014Water Management and Structures
Instrumentation and Data Collection