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B-WIM for Bridge Enforcement and Structural Safety. Department of Civil, Construction, and Environmental Engineering. UTCA. Objectives. B-WIM system to control heavy vehicle overloads , to elaborate the suitable bridge types, and how to design instrumentation.

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b wim for bridge enforcement and structural safety

B-WIM for Bridge Enforcement and Structural Safety

Department of Civil, Construction, and Environmental Engineering

UTCA

objectives
Objectives
  • B-WIM system to control heavy vehicle overloads, to elaborate the suitable bridge types, and how to design instrumentation.
  • B-WIM can reduce uncertainties in the traffic load assessment and optimize the allocation of available funding for bridge maintenance
  • Freight planning purposes
slide3

where:

Q: predicted maximum live load effect, a-deterministic value relating the load effect to a reference loading scheme; W.95- characteristic vehicle weight; H-headway factor; m-factor reflecting the variations of load effects; I-impact factor; g-lateral distribution factor

the potential benefits
The potential benefits …

Improved:

  • delivery of enforcement services by enhancing effectiveness and efficiency;
  • reduction in the total number of vehicle required to stop for enforcement purposes;
  • emissions by reducingunnecessary deceleration, idling
  • controlling of the operation of non-permitted, non-compliant (i.e., overweight or oversized) vehicles; and
  • ongoing performance monitoring and evaluation of vehicle size and weight.
  • freight planning
bwim shema
BWIM shema

SiWIM Bridge

Weigh-in-motion

system

advantages
Advantages

Mobile

Very good accuracy

Quick installation

Reliable

No influence in the pavement

No road block

Low rate for maintenance

Price efficient

Specifications and traffic volume do not give satisfactory traffic loads results

Bridge safety can be calculated more efficiently with SiWIM system

test plan
Test Plan
  • select the bridge
  • install the system
  • create the influence line
  • calibration
  • data processing for reports
  • de-install the system
results for each vehicle
Results for each vehicle
  • Axle load for individual axle
  • Gross vehicle weight
  • Axle distance
  • Speed
  • Class
  • Exact time (2/1000 s)
  • Temperature
data can be used for
Data can be used for
  • traffic analyses and freight planning
  • maintenance planning
  • pre-selection for static weighing
  • monitoring of overload vehicles tryingto avoid static weighing session
  • bridge applications (max. load...)
maintenance sector and law enforcement
Maintenance sector and law enforcement

1. For critical road sections where overloading is a SERIOUS problem (quarries, sections under construction....)

bridge applications
Bridge applications
  • safety assessment of existing bridges
  • assessment of dynamic effects
  • aplication for special transport
evaluate bridge maintenance issues with the proposed bridge wim system
Evaluate bridge maintenance issues with the proposed bridge WIM system:
  • Investigated to provide synchronized data on the traffic load effects and the induced stresses and strains, and therefore become a part of “Intelligent Bridge Monitoring Systems” to optimize the allocation of funds for bridge repair or replacement and to reduce the corresponding traffic disruption.
  • Bridge WIM gives the essential information to calculate the realistic traffic loading Q, and allows for reducing the live load safety factor γQ, which both increase the safety of the structure.
slide22

*Process of collaboration is started with a French group of researchers who are working on multi-span and multilane bridge structures

**The information on the project including final report will be posted at (http://www.eng.uab.edu/cee/faculty/bwim/)

bridge weigh in motion b wim system testing and evaluation

Eighteen Month Project

  • Multi-Campus Research Team
  • Diverse Project Advisory Group
  • PI: Dr. Wilbur (Bill) Hitchcock (UAB)
  • Co-PIs:
    • Dr. Nasim Uddin (UAB)
    • Dr. Virginia Sisiopiku (UAB)
    • Dr. Jason Kirby (UAB)
    • Dr. Talat Abu-Amra (UAB)
    • Dr. Jim Richardson (UA)
    • Dr. Houssam Toutanji (UAH)

Bridge Weigh-in-Motion (B-WIM) System Testing and Evaluation