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Calculating a Bridge Assessment Dynamic Ratio Using a Bridge Weigh-In-Motion system

Young Researchers Seminar 2009 Torino, Italy, 3 to 5 June 2009. Calculating a Bridge Assessment Dynamic Ratio Using a Bridge Weigh-In-Motion system . Jason Dowling. Overview. 1. Bridge Weigh-In-Motion 2. Model Description 3. Assessment Dynamic Ratio

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Calculating a Bridge Assessment Dynamic Ratio Using a Bridge Weigh-In-Motion system

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  1. Young Researchers Seminar 2009 Torino, Italy, 3 to 5 June 2009 Calculating a Bridge Assessment Dynamic Ratio Using a Bridge Weigh-In-Motion system Jason Dowling

  2. Overview 1. Bridge Weigh-In-Motion 2. Model Description 3. Assessment Dynamic Ratio 4. Theoretical Simulations - New Algorithm 5. Conclusions Calculating a Bridge ADR Using a B-WIM system Jason Dowling

  3. Bridge Weigh-In-Motion Instrumented Bridges.... Calculating a Bridge ADR Using a B-WIM system Jason Dowling

  4. Bridge Weigh-In-Motion Moses Algorithm (1979) Calculating a Bridge ADR Using a B-WIM system Jason Dowling

  5. Bridge Weigh-In-Motion Typical ‘Measured’ Response, Mme... Calculating a Bridge ADR Using a B-WIM system Jason Dowling

  6. Bridge Weigh-In-Motion Mth... x Calculating a Bridge ADR Using a B-WIM system Jason Dowling

  7. Bridge Weigh-In-Motion Moses Algorithm (1979) Matrix solution technique: Calculating a Bridge ADR Using a B-WIM system Jason Dowling

  8. Model Description Truck Model... Calculating a Bridge ADR Using a B-WIM system Jason Dowling

  9. Model Description Road ‘Carpet’ Profile Calculating a Bridge ADR Using a B-WIM system Jason Dowling

  10. Model Description Statistical Data - GVW & Velocity - Axle Spacing & Axle Weights Calculating a Bridge ADR Using a B-WIM system Jason Dowling

  11. Assessment Dynamic Ratio (ADR) Definition: associated with a return period i.e. not a single event. Calculating a Bridge ADR Using a B-WIM system Jason Dowling

  12. Trends in ADR Source: SAMARIS (2006) Calculating a Bridge ADR Using a B-WIM system Jason Dowling

  13. Trends in ADR Source: OBrien et. al (2009) Calculating a Bridge ADR Using a B-WIM system Jason Dowling

  14. Theoretical Simulations - ADR 10 years... (500,000 trucks/year) 25m Bridge Class ‘A’ Calculating a Bridge ADR Using a B-WIM system Jason Dowling

  15. Theoretical Simulations - ADR 10 years... (500,000 trucks/year) 25m Bridge Class ‘A’ Calculating a Bridge ADR Using a B-WIM system Jason Dowling

  16. Theoretical Simulations - ADR 50 years 25m Bridge Class ‘A’ Calculating a Bridge ADR Using a B-WIM system Jason Dowling

  17. Theoretical Simulations - ADR 50 years 25m Bridge Class ‘A’ Calculating a Bridge ADR Using a B-WIM system Jason Dowling

  18. Theoretical Simulations - ADR Simulation Variability... Five 10 year simulations Calculating a Bridge ADR Using a B-WIM system Jason Dowling

  19. Theoretical Simulations - Errors... Tendency to under-weigh Steer Axle... Calculating a Bridge ADR Using a B-WIM system Jason Dowling

  20. Theoretical Simulations - Errors... Cause of under-estimation of ADR... Calculating a Bridge ADR Using a B-WIM system Jason Dowling

  21. Theoretical Simulations - New Algorithm Dynamic Response - Time & Freq. Domains Calculating a Bridge ADR Using a B-WIM system Jason Dowling

  22. Theoretical Simulations - New Algorithm 10 Responses represented in the Freq. Domain Calculating a Bridge ADR Using a B-WIM system Jason Dowling

  23. Theoretical Simulations - New Algorithm Filtered Response - Time & Freq Domains Calculating a Bridge ADR Using a B-WIM system Jason Dowling

  24. Theoretical Simulations - New Algorithm Incorporating filtering of dynamic signal... Calculating a Bridge ADR Using a B-WIM system Jason Dowling

  25. Theoretical Simulations - New Algorithm ‘Measured’ Influence Line Calculating a Bridge ADR Using a B-WIM system Jason Dowling

  26. Theoretical Simulations - New Algorithm New Mth... x Calculating a Bridge ADR Using a B-WIM system Jason Dowling

  27. Theoretical Simulations - New Algorithm Static BM using New Approach Calculating a Bridge ADR Using a B-WIM system Jason Dowling

  28. Theoretical Simulations - ADR Example 1: 10 years... Calculating a Bridge ADR Using a B-WIM system Jason Dowling

  29. Theoretical Simulations - ADR Example 2: 10 years... Calculating a Bridge ADR Using a B-WIM system Jason Dowling

  30. Theoretical Simulations - New Algorithm Max Static BM Errors using New Approach... Worst Case... Calculating a Bridge ADR Using a B-WIM system Jason Dowling

  31. Theoretical Simulations - New Algorithm Worst Case: Max Static BM Error... Calculating a Bridge ADR Using a B-WIM system Jason Dowling

  32. Theoretical Simulations - New Algorithm Worst Case: Max Static BM Error... Calculating a Bridge ADR Using a B-WIM system Jason Dowling

  33. Conclusions In Summary: General ADR trends in keeping with recent findings... The Classic Moses Algorithm over-estimates Maximum Static Strain... Incorporating Filtering of the dynamic signal improves predictions... Calculating a Bridge ADR Using a B-WIM system Jason Dowling

  34. My Thanks to the 6th European Framework Project ARCHES for funding my work. Thank you for listening. Calculating a Bridge ADR Using a B-WIM system Jason Dowling

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