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Seismic fragility curves for California concrete bridges with flared two-column bents

  • Jong-Su Jeon
  • Sujith MangalathuEmail author
  • Sang-Youl Lee
Original Research

Abstract

The increased aesthetic appeal of columns with flares resulted in bridge configurations with flared columns during the 1970–1990 design periods in California. Earthquake reconnaissance reports indicated that the flare is detrimental on the structural functionality of the bridge with some geometric configurations. This research examines the relative vulnerability of bridge configurations with flared and non-flared columns for three-span two-column bent bridges with oblong cross-sections. The numerical model of the columns with and without flare is calibrated with existing experimental results. The calibrated models are used to develop the fragility curves for California bridges. Fragility curves for each bridge class are generated by accounting for the material, geometric, and structural uncertainties, and the effects of column flare on the seismic demand and fragility of bridges are investigated in detail in this paper. Results reveal that the presence of column flare for the case study bridges increases the stiffness and strength of columns because of a low potential of column shear failure, resulting in the reduction of bridge vulnerability and have beneficial effects on the structural functionality. Thus, the flare does not necessarily reduce the seismic performance for all bridge cases and depends on the failure mode associated with the bridge configuration. The fragility curves suggested in this research can be used by stakeholders in deciding the retrofitting and maintenance strategies of bridges with architectural flares.

Keywords

Flared columns Fragility curves Model validation Oblong column cross-section 

Notes

Acknowledgements

The research was supported by a Grant (18CTAP-C130227-02) from Technology Advancement Research Program (TARP) funded by Ministry of Land, Infrastructure and Transport of Korean government. This work is also financially supported by Ministry of Public Administration and Security as Disaster Prevention Safety Human Resource Development Project.

References

  1. ACI Committee 318 (2011) Building code requirements for reinforced concrete (ACI 318-11) and commentary. American Concrete Institute, Farmington HillsGoogle Scholar
  2. Baker JW, Lin T, Shahi SK, Jayaram N (2011) New ground motion selection procedures and selected motions for the PEER transportation research program. PEER report 2011/03, Pacific Earthquake Engineering Research Center, University of California, Berkeley, USAGoogle Scholar
  3. Banerjee S, Shinozuka M (2008) Mechanistic quantification of RC bridge damage states under earthquake through fragility analysis. Probab Eng Mech 23(1):12–22CrossRefGoogle Scholar
  4. Caltrans (2006) Seismic design criteria version 1.4. Office of Structures Design, California Department of Transportation, SacramentoGoogle Scholar
  5. Cornell C, Jalayer F, Hamburger R, Foutch D (2002) Probabilistic basis for 2000 SAC Federal Emergency Management Agency steel moment frame guidelines. J Struct Eng 128(4):526–533CrossRefGoogle Scholar
  6. Correal JF, Saiid S, Sanders D, El-Azazy S (2007) Shake table studies of bridge columns with double interlocking spirals. ACI Struct J 104(4):393–401Google Scholar
  7. Dimitrakopoulos EG, Paraskeva TS (2015) Dimensionless fragility curves for rocking response to near-fault excitations. Earthq Eng Struct Dyn 44(12):2015–2033CrossRefGoogle Scholar
  8. Huo YL, Zhang J (2013) Effects of pounding and skewness on seismic responses of typical multispan highway bridges using the fragility function method. J Bridge Eng 18(6):499–515CrossRefGoogle Scholar
  9. Jeon J-S, Mangalathu S, Song J, DesRoches R (2017) Parameterized seismic fragility curves for curved multi-frame concrete box-girder bridges using Bayesian parameter estimation. J Earthq Eng.  https://doi.org/10.1080/13632469.2017.1342291 Google Scholar
  10. Kowalsky MJ, Priestley MJN (2000) Improved analytical model for shear strength of circular reinforced concrete columns in seismic regions. ACI Struct J 97(3):388–396Google Scholar
  11. Leung HY, Burgoyne CJ (2005) Uniaxial stress-strain relationship of spirally confined concrete. ACI Mater J 102(6):445–453Google Scholar
  12. Mackie K, Stojadinovic B (2001) Probabilistic seismic demand model for California highway bridges. J Bridge Eng 6(6):468–481CrossRefGoogle Scholar
  13. Mander JB, Priestley MJN, Park R (1988) Theoretical stress–strain model for confined concrete. J Struct Eng 114(8):1804–1826CrossRefGoogle Scholar
  14. Mangalathu S (2017) Performance based grouping and fragility analysis of box-girder bridges in California. PhD dissertation, Georgia Institute of Technology, USAGoogle Scholar
  15. Mangalathu S, Jeon J-S, DesRoches R, Padgett JE (2016) ANCOVA-based grouping of bridge classes for seismic fragility assessment. Eng Struct 123:379–394CrossRefGoogle Scholar
  16. Mangalathu S, Jeon J-S, Padgett JE, DesRoches R (2017a) Performance-based grouping methods of bridge classes for regional seismic risk assessment: application of ANOVA, ANCOVA, and non-parametric approaches. Earthq Eng Struct Dyn 46(14):2587–2602CrossRefGoogle Scholar
  17. Mangalathu S, Soleimani F, Jeon J-S (2017b) Bridge classes for regional seismic risk assessment: improving HAZUS models. Eng Struct 148:755–766CrossRefGoogle Scholar
  18. Mangalathu S, Heo G, Jeon J-S (2018a) Artificial neural network based multi-dimensional fragility development of skewed concrete bridge classes. Eng Struct 162:166–176CrossRefGoogle Scholar
  19. Mangalathu S, Jeon J-S, DesRoches R (2018b) Critical uncertainty parameters influencing seismic performance of bridges using Lasso regression. Earthq Eng Struct Dyn 47(3):784–801CrossRefGoogle Scholar
  20. McKenna F (2011) OpenSees: a framework for earthquake engineering simulation. Comput Sci Eng 13(4):58–66CrossRefGoogle Scholar
  21. Monteiro R, Delgado R, Pinho R (2016) Probabilistic seismic assessment of RC bridges: part I—uncertainty models. Structures 5:258–273CrossRefGoogle Scholar
  22. Muthukumar S, DesRoches R (2006) A Hertz contact model with non-linear damping for pounding simulation. Earthq Eng Struct Dyn 35(7):811–828CrossRefGoogle Scholar
  23. Nada HM, Sanders DH, Saiidi MS (2003) Seismic performance of RC bridge frames with architectural-flared columns. CCEER 03-03, Center for Earthquake Engineering Research, University of Nevada, USAGoogle Scholar
  24. Nielson BG, DesRoches R (2007) Seismic fragility methodology for highway bridges using a component level approach. Earthq Eng Struct Dyn 36(6):823–839CrossRefGoogle Scholar
  25. Pan Y, Agrawal AK, Ghosn M (2007) Seismic fragility of continuous steel highway bridges in New York State. J Bridge Eng 12(6):689–699CrossRefGoogle Scholar
  26. Priestley MJN, Verma R, Xiao Y (1994) Seismic shear strength of reinforced concrete columns. J Struct Eng 120(8):2310–2329CrossRefGoogle Scholar
  27. Priestley MJN, Seible F, Calvi G (1996) Seismic design and retrofit of bridges. Wiley, New YorkCrossRefGoogle Scholar
  28. Ramanathan KN (2012) Next generation seismic fragility curves for California bridges incorporating the evolution in seismic design philosophy. PhD dissertation, Georgia Institute of Technology, USAGoogle Scholar
  29. Rogers LP, Seo J (2017) Vulnerability sensitivity of curved precast-concrete I-girder bridges with various configurations subjected to multiple ground motions. J Bridge Eng 22(2):04016118CrossRefGoogle Scholar
  30. Saiidi MS, Wehbe NI, Sanders DH, Caywood CJ (2001) Shear retrofit of flared RC bridge columns subjected to earthquakes. J Bridge Eng 6(3):189–197CrossRefGoogle Scholar
  31. Sanchez AV, Seible F, Priestley MJN (1997) Seismic performance of flared bridge columns. SSRP-97/06, Structural Systems Research Project, University of California, San Diego, USAGoogle Scholar
  32. Seo J, Linzell DG (2012) Horizontally curved steel bridge seismic vulnerability assessment. Eng Struct 34:21–32CrossRefGoogle Scholar
  33. Seo J, Rogers LP (2017) Comparison of curved prestressed concrete bridge population response between area and spine modeling approaches toward efficient seismic vulnerability analysis. Eng Struct 150:176–189CrossRefGoogle Scholar
  34. Sezen H, Moehle JP (2004) Shear strength model for lightly reinforced concrete columns. J Struct Eng 130(11):1692–1703CrossRefGoogle Scholar
  35. Shamsabadi A, Khalili-Tehrani P, Stewart JP, Taciroglu E (2010) Validated simulation models for lateral response of bridge abutments with typical backfills. J Bridge Eng 15(3):302–311CrossRefGoogle Scholar
  36. Silva PF, Megally S, Seible F (2009) Seismic performance of sacrificial exterior shear keys in bridge abutments. Earthq Spectra 25(3):643–664CrossRefGoogle Scholar
  37. Soleimani F, Mangalathu S, DesRoches R (2017) A comparative analytical study on the fragility assessment of box-girder bridges with various column shapes. Eng Struct 153:460–478CrossRefGoogle Scholar
  38. Tanaka H, Park R (1993) Seismic design and behavior of reinforced concrete columns with interlocking spirals. ACI Struct J 90(2):192–203Google Scholar

Copyright information

© Springer Nature B.V. 2019

Authors and Affiliations

  1. 1.Department of Civil and Environmental EngineeringHanyang UniversitySeoulRepublic of Korea
  2. 2.Department of Civil and Environmental EngineeringUniversity of CaliforniaLos AngelesUSA
  3. 3.Department of Civil EngineeringAndong National UniversityAndongRepublic of Korea

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