Earthquakes and Structures

  • 제18권1호
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  • Pages.27-44
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  • 2020
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  • 2092-7614(pISSN)
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  • 2092-7622(eISSN)
테크노프레스 (Techno-Press)
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A comparison of three performance-based seismic design methods for plane steel braced frames

  • Kalapodis, Nicos A. (Department of Engineering Science, University of Greenwich) ;
  • Papagiannopoulos, George A. (School of Science and Technology, Hellenic Open University) ;
  • Beskos, Dimitri E. (Department of Disaster Mitigation for Structures, College of Civil Engineering, Tongji University)
  • 투고 : 2019.08.01
  • 심사 : 2019.09.13
  • 발행 : 2020.01.25
⟨ 이전 논문 다음 논문 ⟩

초록

This work presents a comparison of three performance-based seismic design methods (PBSD) as applied to plane steel frames having eccentric braces (EBFs) and buckling restrained braces (BRBFs). The first method uses equivalent modal damping ratios (ξk), referring to an equivalent multi-degree-of-freedom (MDOF) linear system, which retains the mass, the elastic stiffness and responds in the same way as the original non-linear MDOF system. The second method employs modal strength reduction factors (${\bar{q}}_k$) resulting from the corresponding modal damping ratios. Contrary to the behavior factors of code based design methods, both ξk and ${\bar{q}}_k$ account for the first few modes of significance and incorporate target deformation metrics like inter-storey drift ratio (IDR) and local ductility as well as structural characteristics like structural natural period, and soil types. Explicit empirical expressions of ξk and ${\bar{q}}_k$, recently presented by the present authors elsewhere, are also provided here for reasons of completeness and easy reference. The third method, developed here by the authors, is based on a hybrid force/displacement (HFD) seismic design scheme, since it combines the force-base design (FBD) method with the displacement-based design (DBD) method. According to this method, seismic design is accomplished by using a behavior factor (qh), empirically expressed in terms of the global ductility of the frame, which takes into account both non-structural and structural deformation metrics. These expressions for qh are obtained through extensive parametric studies involving non-linear dynamic analysis (NLDA) of 98 frames, subjected to 100 far-fault ground motions that correspond to four soil types of Eurocode 8. Furthermore, these factors can be used in conjunction with an elastic acceleration design spectrum for seismic design purposes. Finally, a comparison among the above three seismic design methods and the Eurocode 8 method is conducted with the aid of non-linear dynamic analyses via representative numerical examples, involving plane steel EBFs and BRBFs.

키워드

참고문헌

  1. ASCE/SEI 7-16 (2017), Minimum Design Loads and Associated Criteria for Buildings and other Structures, American Society of Civil Engineers; Reston, Virginia, U.S.A.
  2. Bosco, M., Marino, E.M. and Rossi, P.P. (2015), "Design of steel frames equipped with BRBs in the framework of Eurocode 8", J. Constr. Steel Res., 113, 43-57. https://doi.org/10.1016/j.jcsr.2015.05.016.
  3. Caprili, S., Mussini, N. and Salvatore, W. (2018), "Experimental and numerical assessment of EBF structures with shear links", Steel Compos. Struct., 28(2), 123-138. http://doi.org/10.12989/scs.2018.28.2.123.
  4. Carr, A.J. (2007), RUAUMOKO 2D: User Manual for the 2-Dimensional Version, University of Canterbury, Canterbury, New Zealand.
  5. Eskandari, R. and Vafaei, D. (2015), "Effects of near-fault records characteristics on seismic performance of eccentrically braced frames", Struct. Eng. Mech., 56(5), 855-870. http://doi.org/10.12989/sem.2015.56.5.855
  6. Eurocode 3 (2005), Design of Steel Structures. Part 1.1: General Rules and Rules for Buildings, European Committee for Standardization, Brussels, Belgium.
  7. Eurocode 8 (2009), Design of Structures for Earthquake Resistance. Part 1.1: General Rules, Seismic Actions and Rules for Buildings, European Committee for Standardization, Brussels, Belgium.
  8. Gleize, J. and Koboevic, S. (2014), "Study of global seismic response of eccentrically braced frames with long links", Proceedings of the 9th International Conference on Structural Dynamics (EYRODYN), Porto, Portugal, June.
  9. Hatzigeorgiou, G.D. (2010), "Damping modification factors for SDOF systems subjected to near-fault, far-fault and artificial earthquakes", Earthq. Eng. Struct. Dyn., 39(11), 1239-1258. https://doi.org/10.1002/eqe.991.
  10. Hsiao, P.C., Lehman, D.E. and Roeder, C.W. (2012), "Improved analytical model for special concentrically braced frames", J. Constr. Steel Res., 73, 80-94. https://doi.org/10.1016/j.jcsr.2012.01.010.
  11. Kalapodis, N.A. (2017), "Seismic design of steel plane braced frames with the use of three new methods", Ph.D. Dissertation, University of Patras, Patras, Greece.
  12. Kalapodis, N.A. and Papagiannopoulos, G.A. (2020), "Seismic design of plane steel braced frames using equivalent modal damping ratios", Soil Dyn. Earthq. Eng., 129, 105947. https://doi.org/10.1016/j.soildyn.2019.105947.
  13. Kalapodis, N.A., Papagiannopoulos, G.A. and Beskos, D.E. (2018), "Modal strength reduction factors for seismic design of plane steel braced frames", J. Constr. Steel Res., 147, 549-563. https://doi.org/10.1016/j.jcsr.2018.05.004.
  14. Karavasilis, T.L., Bazeos, N. and Beskos, D.E. (2006), "A hybrid force/displacement seismic design method for plane steel frames", Proceedings of the 5th International Conference on Behavior of Steel Structures in Seismic Areas (STESSA), Yokohama, Japan, October.
  15. Kazemzadeh Azad, S. and Topkaya, C. (2017), "A review of research on steel eccentrically braced frames", J. Constr. Steel Res., 128, 53-73. https://doi.org/10.1016/j.jcsr.2016.07.032.
  16. Lee, C.H., Jeon, S.W., Kim, J.H. and Uang, C.M. (2005), "Effects of panel zone strength and beam web connection method on seismic performance of reduced beam section steel moment connections", J. Struct. Eng., 131(12), 1854-1865. https://doi.org/10.1061/(ASCE)0733-9445(2005)131:12(1854).
  17. Li, S., Tian, J.B. and Liu, Y.H. (2017), "Performance-based seismic design of eccentrically braced steel frames using target drift and failure mode", Earthq. Struct., 13(5), 443-454. http://doi.org/10.12989/eas.2017.13.5.443.
  18. Loulelis, D.G., Papagiannopoulos, G.A. and Beskos, D.E. (2018), "Modal strength reduction factors for seismic design of steel moment resisting frames", Eng. Struct., 154(1), 23-37. https://doi.org/10.1016/j.engstruct.2017.10.071.
  19. MATLAB (2015), Matlab Documentation; MathWorks Inc., Massachusetts, U.S.A. https://www.mathworks.com.
  20. Muho, E.V., Papagiannopoulos, G.A. and Beskos, D.E. (2019a), "A seismic design method for reinforced concrete moment resisting frames using modal strength reduction factors", Bull. Earthq. Eng., 17(1), 337-390. https://doi.org/10.1007/s10518-018-0436-3.
  21. Muho, E.V., Papagiannopoulos, G.A. and Beskos, D.E. (2019b), "Deformation dependent equivalent modal damping ratios for the performance-based seismic design of plane R/C structures", Soil Dyn. Earthq. Eng., 129. https://doi.org/10.1016/j.soildyn.2018.08.026
  22. Okazaki, T., Lignos, D.G., Hikino, T. and Kajiwara, K. (2013), "Dynamic response of a chevron concentrically braced frame", J. Struct. Eng., 139(4), 515-525. https://doi.org/10.1061/(ASCE)ST.1943-541X.0000679.
  23. Papagiannopoulos, G.A. (2018), "Jacobsen's equivalent damping concept revisited", Soil Dyn. Earthq. Eng., 115, 82-89. https://doi.org/10.1016/j.soildyn.2018.08.001.
  24. Papagiannopoulos, G.A. and Beskos, D.E. (2010), "Towards a seismic design method for plane steel frames using equivalent modal damping ratios", Soil Dyn. Earthq. Eng., 30(10), 1106-1118. https://doi.org/10.1016/j.soildyn.2010.04.021.
  25. Papagiannopoulos, G.A. and Beskos, D.E. (2011), "Modal strength reduction factors for seismic design of plane steel frames", Earthq. Struct., 2(1), 65-88. http://doi.org/10.12989/eas.2011.2.1.065.
  26. PEER (2013), https://ngawest2.berkeley.edu.
  27. Pian, C., Qian, J., Muho, E.V. and Beskos, D.E. (2019), "A hybrid force/displacement seismic design method for reinforced concrete moment resisting frames", Soil Dyn. Earthq. Eng., 129. https://doi.org/10.1016/j.soildyn.2018.09.002.
  28. Priestley, M.J.N., Calvi, G.M. and Kowalsky, M.J. (2007), Displacement-Based Seismic Design of Structures, IUSS Press, Pavia, Italy.
  29. Qi, Y., Li, W. and Feng, W. (2017), "Seismic collapse probability of eccentrically braced steel frames", Steel Compos. Struct., 24(1), 37-52. http://doi.org/10.12989/scs.2017.24.1.037.
  30. Salawdeh, S. and Goggins, J. (2011), "Direct displacement based seismic design for single storey steel concentrically braced frames", Earthq. Struct., 10(5), 1125-1141. http://dx.doi.org/10.12989/eas.2016.10.5.1125.
  31. SAP2000 (2016), Analysis Reference Manual, Computers and Structures Inc., Berkeley. https://www.csiamerica.com/
  32. SEAOC (1999), Recommended Lateral force Requirements and Commentary, Structural Engineers Association of California; Sacramento, California, U.S.A.
  33. Skalomenos, K.A., Hatzigeorgiou, G.D. and Beskos, D.E. (2015), "Application of the hybrid force/displacement (HFD) seismic design method to composite steel/concrete plane frames", J. Constr. Steel Res., 115, 179-190. https://doi.org/10.1016/j.jcsr.2015.08.007.
  34. Tzimas, A.S., Karavasilis, T.L., Bazeos, N. and Beskos, D.E. (2013), "A hybrid force/displacement seismic design method for steel building frames", Eng. Struct., 56, 1452-1463. https://doi.org/10.1016/j.engstruct.2013.07.014.