Performance-Based Retrofits of Long-Span Truss Bridges Based on the Alternate Load Path Redundancy Analysis
Publication: Journal of Bridge Engineering
Volume 28, Issue 2
Abstract
Existing long-span truss bridges typically undergo significant retrofits to improve their resistance against extreme load events, such as the seismic loads, for which the bridge may not have been designed or considered originally. However, the conventional seismic retrofit measures recommended in most existing codes and specifications may not be effective in providing sufficient alternative load path (ALP) redundancy to a bridge that is vulnerable to sudden member-loss scenarios because of the significantly different magnitude of demands. This paper proposed a performance-based retrofit (PBR) approach for long-span truss bridges that are vulnerable to sudden member-loss scenarios. The performance of the bridge has been evaluated by using the demand-to-capacity ratio (DCR) or strain ratio (SR) on the member/component level or the displacement factor on the bridge system level as indicators. Based on the analysis results, the argument is made that the proposed PBR approach allows bridge designers to meet the predetermined performance objectives for sudden member-loss loading conditions. Increase in weight of steel because of such the ALP retrofits is less than 10%. The retrofitted bridge would meet the desired performance levels in the event of sudden loss of any members on the primary trusses of the bridge.
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Acknowledgments
This material is based upon work supported by the Federal Highway Administration under contract number DTFH61-14-D-00010/0004, and the City University of New York High-Performance Computing Center at the College of Staten Island. Any opinions, findings, and conclusions or recommendations expressed in this publication are those of the authors and do not necessarily reflect the views of the Federal Highway Administration.
References
AASHTO. 2015. AASHTO LRFD seismic bridge design specifications. Washington, DC: AASHTO.
AASHTO. 2017. AASHTO LRFD bridge design specifications. 8th ed. Washington, DC: AASHTO.
AASHTO. 2018. Guide specifications for internal redundancy of mechanically-fastened built-up steel members. Washington, DC: AASHTO.
AASHTO. 2020. AASHTO LRFD bridge design specifications. 9th ed. Washington, DC: AASHTO.
Agrawal, A. K., and M. Amjadian. 2015. “Seismic component devices.” In Innovative bridge design handbook: Construction, rehabilitation and maintenance, edited by A. Pipinato, 637–662. Amsterdam, Netherlands: Butterworth-Heinemann.
Agrawal, A. K., E. Mohammed, X. Chen, H. H. Li, and H. F. Wang. 2020. Steel truss retrofits to provide alternate load paths for cut or blast-damaged or destroyed members. Rep. No. FHWA-HRT-20-055. McLean, VA: Federal Highway Administration.
Agrawal, A., P. Tan, S. Nagarajaiah, and J. Zhang. 2009. “Benchmark structural control problem for a seismically excited highway bridge-part I: Phase I problem definition.” Struct. Contr. Health Monit. 16 (5): 509–529. https://doi.org/10.1002/stc.301.
Buckle, I. G., I. Friedland, J. B. Mander, G. Martin, R. Nutt, and M. Power. 2006. Seismic retrofitting manual for highway structures: Part 1 – bridges. Publication No. FHWA-HRT-06-032. Washington, DC: Federal Highway Administration.
Chen, X. 2018. “Steel truss retrofits to provide alternative load paths for Cut or blast damaged/destroyed members.” Ph.D. thesis, Dept. of Civil Engineering, City College of New York, City Univ. of New York.
Chen, X., H. Ge, and T. Usami. 2011. “Seismic demand of buckling-restrained braces installed in steel arch bridges under repeated earthquakes.” J. Earthquake Tsunami 05 (2): 119–150. https://doi.org/10.1142/S1793431111000942.
Chen, X., H. Li, A. K. Agrawal, M. Ettouney, and H. Wang. 2022. “Alternate load paths redundancy analysis of steel truss bridges.” J. Bridge Eng. 27 (11): 04022106. https://doi.org/10.1061/(ASCE)BE.1943-5592.0001943.
El-Bahey, S., and M. Bruneau. 2011. “Buckling restrained braces as structural fuses for the seismic retrofit of reinforced concrete bridge bents.” Eng. Struct. 33 (3): 1052–1061. https://doi.org/10.1016/j.engstruct.2010.12.027.
Ettouney, M., and S. Alampalli. 2013. “Progressive collapse principles of bridge systems.” In Proc.,10th Int. Conf. on Shock and Impact Loads on Structures. Reston, VA: ASCE.
Ettouney, M., R. Smilowitz, M. Tang, and A. Hapij. 2006. “Global system considerations for progressive collapse with extensions to other natural and man-made hazards.” J. Perform. Constr. Facil. 4 (20): 403–417. https://doi.org/10.1061/(ASCE)0887-3828(2006)20:4(403).
Guo, Y.-L., J.-Z. Tong, X.-A. Wang, and P. Zhou. 2018. “Sub-assemblage tests and design of steel channels assembled buckling-restrained braces.” Bull. Earthquake Eng. 16 (9): 4191–4224. https://doi.org/10.1007/s10518-018-0337-5.
Imbsen, R., and W. Liu. 1993. “Seismic evaluation of Benicia-Martinez bridge.” In Proc., 1st US Seminar, Seismic Evaluation and Retrofit of Steel Bridges. Berkeley, CA: University of California.
Imbsen, R. A., and R. A. Schamber. 1999. “Seismic retrofit of the north approach viaduct of the Golden Gate Bridge.” Transp. Res. Rec. 1688: 154–162. https://doi.org/10.3141/1688-18.
Kandemir, E. C., T. Mazda, H. Nurui, and H. Miyamoto. 2011. “Seismic retrofit of an existing steel arch bridge using viscous damper.” Procedia Eng. 14: 2301–2306. https://doi.org/10.1016/j.proeng.2011.07.290.
Khandelwal, K., S. El-Tawil, and F. Sadek. 2009. “Progressive collapse analysis of seismically designed steel braced frames.” J. Constr. Steel Res. 65: 699–708. https://doi.org/10.1016/j.jcsr.2008.02.007.
Liu, W. D., F. S. Nobari, R. A. Schamber, and R. A. Imbsen. 1997. Performance based seismic retrofit of Benicia—Martinez Bridge. Washington, DC: The National Academies of Sciences, Engineering, and Medicine.
Li, H. H. 2021. “Alternate load paths and retrofits for long-span truss bridges under sudden member loss and blast loads.” Ph.D. thesis, Dept. of Civil Engineering, City College of New York, City Univ. of New York.
Li, H. H., A. K. Agrawal, X. Chen, M. Ettouney, and H. F. Wang. 2022. “A framework for identification of the critical members for truss bridges through nonlinear dynamic analysis.” J. Bridge Eng. 27 (8): 0402206.
Li, H., L. Li, W. Wu, and L. Xu. 2020a. “Seismic fragility assessment framework for highway bridges based on an improved uniform design-response surface model methodology.” Bull. Earthquake Eng. 18: 2329–2353. https://doi.org/10.1007/s10518-019-00783-1.
Li, H., L. Li, G. Zhou, and L. Xu. 2020b. “Effects of various modeling uncertainty parameters on the seismic response and seismic fragility estimates of the aging highway bridges.” Bull. Earthquake Eng. 18: 6337–6373. https://doi.org/10.1007/s10518-020-00934-9.
Li, H. H., L. F. Li, G. J. Zhou, and L. Xu. 2020c. “Time-dependent seismic fragility assessment for aging highway bridges subject to non-uniform chloride-induced corrosion.” J. Earthquake Eng. 24: 2020.
Matson, D. D., and P. G. Buckland. 1995. “Experience with seismic retrofit of major bridges.” In Proc., 1st National Seismic Conf., on Bridges and Highways. San Diego, CA: Caltrans and FHWA.
Nourzadeh, D., J. Humar, and A. Braimah. 2017. “Comparison of response of building structures to blast loading and seismic excitations.” Procedia Eng. 210: 320–325. https://doi.org/10.1016/j.proeng.2017.11.083.
Reno, M. L., and M. N. Pohll. 2010. “Seismic retrofit of California’s Auburn–Foresthill Bridge.” Transp. Res. Rec. 2201 (1): 83–94. https://doi.org/10.3141/2201-10.
Saravanan, M., R. Goswami, and G. S. Palani. 2018. “Replaceable fuses in earthquake resistant steel structures: A review.” Int. J. Steel Struct. 18 (3): 868–879. https://doi.org/10.1007/s13296-018-0035-9.
Uang, C.-M., and M. Bruneau. 2018. “State-of-the-art review on seismic design of steel structures.” J. Struct. Eng. 144 (4): 03118002. https://doi.org/10.1061/(ASCE)ST.1943-541X.0001973.
Usami, T., Z. Lu, and H. Ge. 2005. “A seismic upgrading method for steel arch bridges using buckling-restrained braces.” Earthquake Eng. Struct. Dyn. 34 (4-5): 471–496. https://doi.org/10.1002/eqe.442.
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© 2022 American Society of Civil Engineers.
History
Received: Jul 22, 2021
Accepted: Oct 12, 2022
Published online: Nov 22, 2022
Published in print: Feb 1, 2023
Discussion open until: Apr 22, 2023
ASCE Technical Topics:
- Bridge design
- Bridge engineering
- Bridges
- Bridges (by type)
- Buildings
- Construction engineering
- Construction methods
- Continuum mechanics
- Design (by type)
- Dynamic loads
- Dynamics (solid mechanics)
- Engineering fundamentals
- Engineering mechanics
- Existing buildings
- Load and resistance factor design
- Load factors
- Rehabilitation
- Seismic loads
- Solid mechanics
- Span bridges
- Structural design
- Structural dynamics
- Structural engineering
- Structural members
- Structural systems
- Structures (by type)
- Truss bridges
- Trusses
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