Advances in Computational Design

  • 제2권1호
  • /
  • Pages.15-28
  • /
  • 2017
  • /
  • 2383-8477(pISSN)
  • /
  • 2466-0523(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Can irregular bridges designed as per the Indian standards achieve seismic regularity?

  • Thomas, Abey E. (Department of Civil Engineering, National Institute of Technology Calicut) ;
  • Somasundaran, T.P. (Department of Civil Engineering, National Institute of Technology Calicut) ;
  • Sajith, A.S. (Department of Civil Engineering, National Institute of Technology Calicut)
  • 투고 : 2016.06.13
  • 심사 : 2016.10.24
  • 발행 : 2017.01.25
⟨ 이전 논문 다음 논문 ⟩

초록

One of the major developments in seismic design over the past few decades is the increased emphasis for limit states design now generally termed as Performance Based Engineering. Performance Based Seismic Design (PBSD) uses Displacement Based Design (DBD) methodology wherein structures are designed for a target level of displacement rather than Force Based Design (FBD) methodology where force or strength aspect is being used. Indian codes still follow FBD methodology compared to other modern codes like CalTrans, which follow DBD methodology. Hence in the present study, a detailed review of the two most common design methodologies i.e., FBD and DBD is presented. A critical evaluation of both these methodologies by comparing the seismic performance of bridge models designed using them highlight the importance of adopting DBD techniques in Indian Standards also. The inherent discrepancy associated with FBD in achieving 'seismic regularity' is highlighted by assessing the seismic performance of bridges with varied relative height ratios. The study also encompasses a brief comparison of the seismic design and detailing provisions of IRC 112 (2011), IRC 21 (2000), AASHTO LRFD (2012) and CalTrans (2013) to evaluate the discrepancies on the same in the Indian Standards. Based on the seismic performance evaluation and literature review a need for increasing the minimum longitudinal reinforcement percentage stipulated by IRC 112 (2011) for bridge columns is found necessary.

키워드

참고문헌

  1. AASHTO LRFD (2012), American Association of State and Highway Transportation Officials LRFD Bridge Design Specifications, Washington DC.
  2. Akbari, R. (2010), "Cyclic response of RC continuous span bridges with irregular configuration in longitudinal direction", Structure and Infrastructure Engineering.
  3. Bhowmick, A. (2014), "Detailing provisions of IRC:112-2011 compared with Previous codes (i.e., IRC:21 & IRC:18)", J. Indian Roads Cong., 75(1), 610.
  4. Boys, A., Bull, D. and Pampanin, S. (2008), "Seismic performance assessment of inadequately detailed reinforced concrete columns", New Zealand Society of Earthquake Engineering (NZSEE) Conference, Wairakei, New Zealand.
  5. Guirguis, J.E.B. and Mehanny, S.S.F. (2012), "Evaluating codes criteria for regular seismic behavior of continuous concrete box girder bridges with unequal height piers", J. Bridge Eng., 18(6), 486-498. https://doi.org/10.1061/(ASCE)BE.1943-5592.0000383
  6. Ishac, M.G. and Mehanny, S.S.F. (2016), "Do mixed pier-to-deck connections alleviate irregularity of seismic response of bridges with unequal height piers?", Bull. Earthq. Eng., 1-25.
  7. Johnson, N., Ranf, R.T., Saiidi, M.S., Sanders, D. and Eberhard, M. (2008), "Seismic testing of a two-span reinforced concrete bridge", J. Bridge Eng., 13(2), 173-182. https://doi.org/10.1061/(ASCE)1084-0702(2008)13:2(173)
  8. Kowalsky, M.J. (2002), "A displacement based approach for the seismic design of continuous concrete bridges", Earthq. Eng. Struct. D., 31(3), 719-747. https://doi.org/10.1002/eqe.150
  9. Ortiz, J. (2006), "Displacement-based design of continuous concrete bridges under transverse seismic excitation", European School for Advanced Studies in Reduction of Seismic Risk (ROSE School).
  10. Papanikolaou, V.K. and Kappos, A.J. (2009), "Numerical study of confinement effectiveness in solid and hollow reinforced concrete bridge piers: Methodology", Comput. Struct., 87(21), 1427-1439. https://doi.org/10.1016/j.compstruc.2009.05.004
  11. Priestley, M.J.N. (2000), "Performance based seismic design", Proceedings of the 12th World Conference on Earthquake Engineering, New Zealand.
  12. Priestley, M.J.N., Calvi, G.M. and Kowalsky, M.J. (2007), Displacement-based seismic design of structures, IUSS Press, Pavia, Italy, ISBN:978-88-6198-000-6
  13. Suarez, V. and Kowalsky, M. (2006), "Implementation of displacement based design for highway bridges", Proceedings of the fifth National Seismic Conference on Bridges & Highways, San Francisco, Canada.
  14. Tamanani, M., Gian, Y. and Ayoub, A. (2016), "Evaluation of code criteria for bridges with unequal pier heights", Bull. Earthq. Eng., 1-24.
  15. Zhu, L., Elwood, K.J. and Haukaas, T. (2007), "Classification and seismic safety evaluation of existing reinforced concrete columns", J. Struct. Eng., 133(9), 1316-1330. https://doi.org/10.1061/(ASCE)0733-9445(2007)133:9(1316)
  16. Ziehl, P.H., Cloyd, J.E. and Kreger, M.E. (1998), "Evaluation of minimum longitudinal reinforcement requirements for reinforced concrete columns", Report No. FHWA/TX-02/1473-S, Center for Transportation Research The University of Texas at Austin.