Article Article
Application of 3D LIDAR Scan of a Bridge under Static Load Testing

The size and complexity of bridges make the analysis of such structures difficult. Load testing is a useful technique to test the performance of bridges and assess the presence of damage. Traditional techniques for measuring the response of bridges during load testing often necessitate physical contact with the bridge and thus restrict measurements to only the contact area. A 3D terrestrial light detection and ranging (LIDAR) scanner can provide highly accurate, noncontact measurements of bridge surface points. The scanner can obtain the geometric information of the entire bridge surface area within its scanning range, making it a powerful tool for bridge load test measurements. In this paper, the 3D scanner capability was demonstrated through the testing of a high-performance steel girder bridge in Iredell County, North Carolina. By comparing the changes of bridge surface scan data before and after a static load test, displacements of surface points were calculated. Also, the accuracy of the deflection measurement and a strain calculation technique using LIDAR scan data are discussed.

ASTM, G101–04: Standard Guide for Estimating the Atmospheric Corrosion Resistance of Low-alloy Steels, American Society for Testing of Materials, West Conshohocken, Pennsylvania, 2010. ASTM, A709/A709M Standard Specification for Structural Steels for Bridges, American Society for Testing and Materials, West Conshohocken, Pennsylvania, 2000. Alaylioglu, H. and A. Alaylioglu, “Dynamic Structural Assessment of a Highway Bridge via Hybrid FE Model and In-situ Testing.” Computers & Structures, Vol. 63, No. 3, 1997, pp. 439–453. Ataei, S., A. A. Aghakouchak, M. S. Marefat and S. Mohammadzadeh, “Sensor Fusion of a Railway Bridge Load Test Using Neural Network,” Expert Systems with Applications, Vol. 29, 2005, pp. 678–683. Au, T., Elementary Structural Mechanics, Prentice Hall, Englewood Cliffs, New Jersey, 1963, pp. 368–377. Bosch, T., S. Pavageau, D. D’Alessandro, N. Servagent, V. Annovazzi-Lodi and S. Donati, “A Low-cost, Optical Feedback Laser Range-finder with Chirp-Control,” Conference Proceedings of the 18th IEEE Instrumentation and Measurement Technology, May 2001, pp. 1070–1074. Chan, T. H. T., Z. X. Li and J. M. Ko, “Fatigue Analysis and Life Prediction of Bridges with Structural Health Monitoring Data – Part II: Application,” International Journal of Fatigue, Vol. 23, No. 1, 2001, pp. 55–64. Faber, M. H., D. V. Val and M.G. Stewart, “Proof Load Testing for Bridge Assessment and Upgrading,” Engineering Structures, Vol. 22, No. 12, 2000, pp. 1677–1689. Felkel, J. P., D. C. Rizos and P.H. Ziehl, “Structural Performance and Design Evaluation of HPS 70W Bridge Girders,” Journal of Constructional Steel Research, Vol. 63, No. 7, 2007, pp. 909–921. Frýba, L. and M. Pirner, “Load Tests and Modal Analysis of Bridges,” Engineering Structures, Vol. 23, No. 1, 2001, pp. 102–109. Fuchs, P. A., G. A. Washer, S. B. Chase and M. Moore, “Laser-based Instrumentation for Bridge Load Testing,” Journal of Performance of Constructed Facilities, Vol. 18, No. 4, 2004, pp. 213–219. Gentile, C. and N. Gallino, “Ambient Vibration Testing and Structural Evaluation of an Historic Suspension Footbridge,” Advances in Engineering Software, Vol. 39, No. 4, 2008, pp. 356–366. Hassan, M., O. Burdet and R. Favre, “Ultrasonic Measurements and Static Load Tests in Bridge Evaluation” NDT & E International, Vol. 28, No. 6, 1995, pp. 331–337. Idriss, R. L., K. R. Whit, C. B. Woodward and D. V. Jauregui, “Evaluation and Testing of a Fracture Critical Bridge,” NDT & E International, Vol. 28, No. 6, 1995, pp. 339–347. Jiang, R., D. V. Jáuregui and K. White, “Close-range Photogrammetry Applications in Bridge Measurement: Literature Review,” Measurement, Vol. 41, 2008, pp. 823–834. Klowak, C. S. and A. A. Mufti, “Behaviour of Bridge Deck Cantilever Overhangs Subjected to a Static and Fatigue Concentrated Load,” Construction and Building Materials, Vol. 23, No. 4, 2009, pp. 1653–1664. Klowak, C., A. Memon and A. Mufti, “Static and Fatigue Investigation of Second Generation Steel-free Bridge Decks,” Cement and Concrete Composites, Vol. 28, No. 10, 2006, pp. 890–897. Mertz, D. R., “Trends in Design and Construction of Steel Highway Bridges in the United States,” Progress in Structural Engineering and Materials, Vol. 3, No. 1, 2001, pp. 5–12. Mills, J. and D. Barber, “Geomatics Techniques for Structural Surveying,” Journal of Surveying Engineering, Vol. 130, No. 2, 2004, pp. 56–64. Nassif, H. H., M. Gindy and J. Davis, “Comparison of Laser Doppler Vibrometer with Contact Sensors for Monitoring Bridge Deflection and Vibration,” NDT & E International, Vol. 38, No. 3, 2005, pp. 213–218. NCHRP, Manual for Bridge Rating Through Load Testing, Research Result Digest No. 234, National Cooperative Highway Research Program – Transportation Research Board, Washington, DC, 1998. Nowak, A. S., S. Kim and P. R. Stankiewicz, “Analysis and Diagnostic Testing of a Bridge,” Computers & Structures, Vol. 77, No. 1, 2000, pp. 91–100. Orbán, Z. and M. Gutermann, “Assessment of Masonry Arch Railway Bridges Using Non-destructive In-situ Testing Methods,” Engineering Structures, Vol. 31, No. 10, 2009, pp. 2287–2298. Ryu, H. K., Y. J. Kim and S. P. Chang, “Crack Control of a Continuous Composite Two-girder Bridge with Prefabricated Slabs Under Static and Fatigue Loads,” Engineering Structures, Vol. 29, No. 6, 2007, pp. 851–864. Senthilvasan, J., D. P. Thambiratnam and G. H. Brameld, “Dynamic Response of a Curved Bridge Under Moving Truck Load,” Engineering Structures, Vol. 24, No. 10, 2002, pp. 1283–1293. Wang, M. L., G. Heo and D. Satpathi, “Dynamic Characterization of a Long Span Bridge: A Finite Element Based Approach,” Soil Dynamics and Earthquake Engineering, Vol. 16, Nos. 7–8, 1997, pp. 503–512. Wasserman, E. and H. Pate, “Tennessee’s Experience with High Performance Steel: An Owner’s Perspective,” Conference Proceedings, Steel Bridge Design and Construction for the New Millennium with Emphasis on High Performance Steel, Lincoln, Nebraska, National Bridge Research Organization, December 2000, pp. 138–145.
Usage Shares
Total Views
366 Page Views
Total Shares
0 Tweets
0 PDF Downloads
0 Facebook Shares
Total Usage