Earthquakes and Structures

Techno-Press (테크노프레스)
권호 표지
DOI QR코드

DOI QR Code

Direct displacement-based design accuracy prediction for single-column RC bridge bents

  • Tecchio, Giovanni (Department of Civil, Architectural and Environmental Engineering (DICEA), University of Padua) ;
  • Dona, Marco (Department of Civil, Architectural and Environmental Engineering (DICEA), University of Padua) ;
  • Modena, Claudio (Department of Civil, Architectural and Environmental Engineering (DICEA), University of Padua)
  • Received : 2014.04.01
  • Accepted : 2015.03.09
  • Published : 2015.09.25
⟨ Previous Next ⟩

Abstract

In the last decade, displacement-based (DB) methods have become established design procedures for reinforced concrete (RC) structures. They use strain and displacement measures as seismic performance control parameters. As for other simplified seismic design methods, it is of great interest to prove if they are usually conservative in respect to more refined, nonlinear, time history analyses, and can estimate design parameters with acceptable accuracy. In this paper, the current Direct Displacement-Based Design (DDBD) procedure is evaluated for designing simple single degree of freedom (SDOF) systems with specific reference to simply supported RC bridge piers. Using different formulations proposed in literature for the equivalent viscous damping and spectrum reduction factor, a parametric study is carried out on a comprehensive set of SDOF systems, and an average error chart of the method is derived allowing prediction of the expected error for an ample range of design cases. Following the chart, it can be observed that, for the design of actual RC bridge piers, underestimation errors of the DDBD method are very low, while the overestimation range of the simplified displacement-based procedure is strongly dependent on design ductility.

Keywords

References

  1. Ayala, G.A., Castellanos, H. and Lopez, S. (2012), "A displacement-based seismic design method with damage control for RC buildings", Earthq. Struct., 3(3), 413-434. https://doi.org/10.12989/eas.2012.3.3_4.413
  2. Chopra, A.K. (2001), "Direct displacement-based design: use of inelastic vs. elastic design spectra", Earthq. Spectra, 17(1), 47-64. https://doi.org/10.1193/1.1586166
  3. Comite Europeen de Normalisation, EN 1998-1 (2003), Eurocode 8, Design of Structures for Earthquake Resistance" - Part 1: "General Rules, Seismic Actions and Rules for Buildings, CEN, Brussels, Belgium.
  4. Comite Europeen de Normalisation, prEN 1998-1 (1998), Eurocode 8, Design of Structures for Earthquake Resistance" - Part 1: "General Rules, Seismic Actions and Rules for Buildings, CEN, Brussels, Belgium.
  5. Dwairi, H.M., Kowalsky, M.J. and Nau, J.M. (2007), "Equivalent damping in support of direct displacement-based design", J. Earthq. Eng., 11(4), 512-530. https://doi.org/10.1080/13632460601033884
  6. Faccioli, E. and Villani, M. (2009), "Seismic hazard mapping for Italy in terms of broadband Displacement Response Spectra", Earthq. Spectra, 25(3), 515-539. https://doi.org/10.1193/1.3159004
  7. Fajfar, P. and Krawinkler, H. (1997), "Seismic design methodologies for the next generation of codes", Workshop on Seismic Design Methodologies for the Next Generation of Codes, Bled, Slovenia.
  8. Grant, D.N., Blandon, C.A. and Priestley, M.J.N. (2005), Modelling Inelastic Response in Direct Displacement-Based Design, Report 2005/03, IUSS Press, Pavia, Italy.
  9. Grendene, M., Franchetti, P. and Modena, C. (2012), "Regularity criteria for RC and PRC multispan continuous bridges", J. Bridge Eng., 17(4), 671-681. https://doi.org/10.1061/(ASCE)BE.1943-5592.0000267
  10. Italian Ministry of Infrastructure, D.M. Infrastrutture 14 gennaio 2008, NTC'08, "Nuove Norme Tecniche per le Costruzioni", published on S.O. n. 30 in G.U. n. 29.
  11. Jacobsen, L.S. (1930), "Steady forced vibrations as influenced by damping", Transactione, ASME, 52(1), 169-181.
  12. Jacobsen, L.S. (1960), "Damping in composite structures", Proceedings of the 2nd World Conference on Earthquake Engineering, Tokyo and Kyoto, Japan.
  13. Newmark, N.M. and Hall, W.J. (1982), Earthquake Spectra and Design, Monograph, Earthquake Engineering Research Institute (EERI), Oakland, California, USA.
  14. Priestley, M.J.N. (1993), "Myths and fallacies in earthquake engineering-conflicts between design and reality", Bull. NZSEE, 26(3), 329-341.
  15. Priestley, M.J.N. (2000), "Performance based seismic design", Keynote Address, Proceedings of the 12th World Conference on Earthquake Engineering, Auckland, New Zealand.
  16. Priestley, M.J.N. (2005), "Viscous damping in seismic design and analysis", J. Earthq. Eng., 9(2), 229-255. https://doi.org/10.1142/S1363246905002365
  17. Priestley, M.J.N., Calvi, G.M. and Kowalsky, M.J. (2007), Displacement-Based Seismic Design of Structures, IUSS Press, Pavia, Italy.
  18. Shibata, A. and Sozen, M. (1976), "Substitute-structure method for seismic design in reinforced concrete", J. Struct. Div., ASCE, 102(1), 1-18.
  19. Sullivan, T.J., Priestley, M.J.N. and Calvi, G.M. (2012), A Model Code for the Displacement-Based Seismic Design of Structures, DBD 12, IUSS Press, Pavia, Italy.

Cited by

  1. Evaluation of a DDB design method for bridges isolated with triple pendulum bearings vol.59, pp.5, 2016, https://doi.org/10.12989/sem.2016.59.5.803
  2. Direct displacement based design of hybrid passive resistive truss girder frames vol.28, pp.6, 2018, https://doi.org/10.12989/scs.2018.28.6.691