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Fiber Optic Weigh-in-Motion (WIM) sensor for Bridges

Fiber Optic Weigh-in-Motion (WIM) sensor for Bridges. Luisa Degiovanni and Farhad Ansari , Civil and Materials Engineering, University of Illinois at Chicago .

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Fiber Optic Weigh-in-Motion (WIM) sensor for Bridges

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  1. Fiber Optic Weigh-in-Motion (WIM) sensor for Bridges Luisa Degiovanni and FarhadAnsari, Civil and Materials Engineering, University of Illinois at Chicago • The measure of static axle load of heavy vehicles as they drive at highway speed is an effective tool for condition assessment of in-service structures. • Results can be used for improvement of pavement managing systems, road transport analysis, detection of overloaded vehicles, enforcement of weight limits. 110 105 100 • WIM systems may provide reliable information about the actual dynamic load and calculate the fatigue cycles experienced by the structures. 95 90 INFLUENCE LINE 85 strain 80 75 70 65 60 150 160 170 180 190 200 210 220 230 240 250 load location • INVERSE PROBLEM: use the response of a highway bridge to weigh trucks. • Application of fiber optic sensor technology (accuracy, low cost, light weight, Immune to interference, non-intrusive). • Placement of sensors under the bridge deck (no need for new construction or weigh station). • Use of influence lines as a tool for the detection of the truck weight through the bridge deck responses to loading. • Development of sensors and data processing system for the detection of speed and static axle loads of heavy vehicles. • Evaluations of errors due to the dynamics of the problem, due to vehicles speed, change in tires pressure, spring types, pavement roughness. • Study of WIM systems (sensors number and placement to improve the accuracy).

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