Diagnostic load testing of bridges - case studies
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This document summarizes diagnostic load testing performed on two new bridges in Ecuador: the Los Pajaros Bridge and ramps at the La Armenia Interchange. Load testing involved placing trucks weighing up to 2400kN (60% of design load) in various positions to model different load cases. Deflections were measured and compared to computational models. For both bridges, measured deflections closely matched predictions, validating the bridge designs and indicating they were ready for traffic. In conclusion, diagnostic load testing is an important way to verify bridge designs by comparing real responses to models.
Diagnostic load testing of bridges - case studies
- 1. Diagnostic Load Testing of New Bridges Santiago Zaruma, M.Sc. Structural Engineer ADSTREN Cía. Ltda.
- 2. Overview - Introduction - Load Testing of Los Pajaros Bridge - Load Testing of La Armenia Interchange - Conclusions
- 3. - Diagnostic testing: verification of design - Deflections - Load levels around 60% of design vehicular live load (AASHTO HL-93) Introduction - Load measurable responses + 9.36kN/m per lane
- 4. Los Pajaros Bridge Load Testing
- 5. Los Pajaros Bridge Simón Bolívar Ave., Quito, Ecuador Los Pájaros Bridge Carapungo Interchange
- 6. Project description: 3 spans @ 65m = 195m Los Pajaros Bridge Construction38m
- 7. Project description: Los Pajaros Bridge Construction 23.6 m 3 @ 2.8m 4 @ 2.8m 2.8m web
- 8. Other benefits of launching: • Safer • Faster • Cheaper • Easier to inspect Other bridge components can be constructed at the same time Incremental Launching Method Los Pajaros Bridge Construction
- 10. Los Pajaros Bridge – Diagnostic Load Testing Does this represent this?
- 11. Dump truck positions 300kN each Computational Model Los Pajaros Bridge – Diagnostic Load Testing
- 12. Computational Model Los Pajaros Bridge – Diagnostic Load Testing
- 13. Field Tests Los Pajaros Bridge – Diagnostic Load Testing Load Case 3 Load Case 4 - Eight trucks 2400kN (60% design load) - Seven positions (load cases)
- 14. Field Tests Los Pajaros Bridge – Diagnostic Load Testing
- 15. Field Tests Los Pajaros Bridge – Diagnostic Load Testing
- 16. Field Tests Los Pajaros Bridge – Diagnostic Load Testing
- 17. Field Test vs. Computer Model Predictions Los Pajaros Bridge – Diagnostic Load Testing Load Case 3 Load Case 4 - Analytical predictions ~ measured responses - Bridge behaves as designed - Ready for opening to traffic
- 19. La Armenia Interchange – Valle de los Chillos La Armenia Interchange – Diagnostic Load Testing - Five ramps Steel tub-girder bridges
- 20. La Armenia Interchange – Valle de los Chillos La Armenia Interchange – Diagnostic Load Testing
- 21. Diagnostic Load Testing of Ramp 15 La Armenia Interchange – Diagnostic Load Testing
- 22. Diagnostic Load Testing of Ramp 11 La Armenia Interchange – Diagnostic Load Testing
- 23. Diagnostic Load Testing of Ramp 11 La Armenia Interchange – Diagnostic Load Testing
- 24. La Armenia Interchange – Ramp 11, Load Case 7 La Armenia Interchange – Diagnostic Load Testing
- 25. Conclusions
- 26. - Diagnostic load testing: new bridges = design verification - Deflections - Different load cases - Test load ~ 60% the design vehicular load - Disagreement between field and model => further studies - Presented cases: close correspondence Conclusions