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WP 15 – Survey of Highway Structures

WP 15 – Survey of Highway Structures. Aleš Žnidarič Eugene O’Brien, Joan Casas, Alan O’Connor, Tomasz Wierzbicki. WP 15 – Survey Objective. T o provide an updated inventory and assessment of highway structures in selected EEA and CE countries. WP 15 – Survey Tasks. 15.1 Data collection

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WP 15 – Survey of Highway Structures

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  1. WP 15 – Survey of Highway Structures Aleš ŽnidaričEugene O’Brien, Joan Casas, Alan O’Connor, Tomasz Wierzbicki SAMARIS seminar Brussels

  2. WP 15 – SurveyObjective To provide an updated inventory and assessment of highway structures in selected EEA and CE countries. SAMARIS seminar Brussels

  3. WP 15 – SurveyTasks 15.1 Data collection 15.2 Condition assessment 15.3 Loading 15.4 Structural safety 15.5 Survey SAMARIS seminar Brussels

  4. WT 15.1 – Data collection SAMARIS seminar Brussels

  5. WT 15.2 – Condition Assessment • focus on procedures used for assessment of structural condition • compare of different CA methodologies • overview of the highway structures condition in selected countries SAMARIS seminar Brussels

  6. WT 15.2 – Condition Assessment • experience from the following countries has been covered in the SAMARIS: Czech Republic Austria Hungary Denmark Norway France Poland Germany Slovenia United Kingdom United States • links to COST 345, PIARC C11 SAMARIS seminar Brussels

  7. WT 15.2 – Condition Assessment Straightforward instructions on how to: • detect possible deterioration processes • indicate condition of structures and their elements • assess condition of the whole structure population • rank structures for urgent repair and maintenance strategies • optimise allocation of budget SAMARIS seminar Brussels

  8. WT 15.2 – Condition AssessmentHandbook of damages • purpose: to facilitate and improve identification of damages on structures: • during the training for bridge inspectors • to clarify ambiguous cases • based on COST 345 application • Internet application: • inspect and add new information • searching tool SAMARIS seminar Brussels

  9. WT 15.2 – Condition Assessment SAMARIS seminar Brussels

  10. WT 15.3 Loading • subtask 15.3.1: Dead Loads • subtask 15.3.2: True traffic loading • subtask 15.3.3: Live load modelling • subtask 15.3.4: Dynamic loading • subtask 15.3.5: Experiments SAMARIS seminar Brussels

  11. WT 15.3 LoadingDead Loads • evaluation of existing procedures • assessment of data • demonstration of dead load evaluation SAMARIS seminar Brussels

  12. WT 15.3 LoadingTrue Traffic Loading 15.3.2 True Traffic Loading WIM Data collected from 20 sites in Slovenia & 6 sites in the Netherlands (thanks to DWW) • Data analysed at UCD to determine characteristics of weight distribution by season/road type (inter-urban, etc.) SAMARIS seminar Brussels

  13. WT 15.3 Loading Dynamic Loading • Simple dynamic models of bridge-truck integration to identify critical combinations of speed and spacing SAMARIS seminar Brussels

  14. WP 15.3 – LoadingDynamic Loading • Full dynamic models of bridge-truck interaction for multiple trucks have also been developed • In process of being calibrated with experimentally recorded WIM data • Currently looking at influence of pavement roughness SAMARIS seminar Brussels

  15. WP 15.3 – LoadingExperimental Programme 2 experiments planned: • different structural forms and levels of deterioration, road profile and therefore dynamic characteristics • different geographic location and traffic characteristics • different durations of recording proposed • different loading scenarios govern extreme SAMARIS seminar Brussels

  16. WP 15 – LoadingExperiment 1 in Poland SAMARIS seminar Brussels

  17. WP 15 – LoadingExperiment 1 in Poland SAMARIS seminar Brussels

  18. WP 15 – LoadingExperiment 2 in Slovenia • to assess influence of pavement unevenness on bridge dynamics • to get statistically evaluated impact factors for 2-week population of vehiclesbeforeand afterrehabilitation • bridge WIM electronics upgraded for dynamicmeasurements SAMARIS seminar Brussels

  19. WP 15 – SurveyExperiments SAMARIS seminar Brussels

  20. WP 15 – LoadingExperiment 2 in Slovenia SAMARIS seminar Brussels

  21. WP 15 – Safety • surveyed work of BRIME (European Research Project), COST345, ISO, JCSS, PIARC (World Road Association) SAMARIS seminar Brussels

  22. WP 15 – Safety • countries having special guidelines for safety assessment of existing highway bridges, have been or will be analysed: • Canada • Czech Republic • Denmark • Norway • Slovenia • Switzerland • United Kingdom • USA SAMARIS seminar Brussels

  23. WP 15 – SafetyProvisional conclusions • in many countries no safety codes exist, benefits in assessment where they do • safety assessment should be based on LSF • 5 levels of analysis form the most efficient assessment process • resistance formulas for undamaged elements can not be the same as for the deteriorated ones • no consensus on how to do loading tests • different target reliability levels for design and assessment may be considered SAMARIS seminar Brussels

  24. Conclusion • work in WP 15 is well under way • expected benefits: explicit guidelines and recommendations how to improve and optimise assessment of existing highway structures using: • more modern assessment techniques • better load modelling • realistic dynamic loading • safety assessment procedures SAMARIS seminar Brussels

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