Earthquakes and Structures

  • 제2권1호
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  • Pages.65-88
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  • 2011
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  • 2092-7614(pISSN)
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  • 2092-7622(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Modal strength reduction factors for seismic design of plane steel frames

  • Papagiannopoulos, George A. (Department of Civil Engineering, University of Patras) ;
  • Beskos, Dimitri E. (Department of Civil Engineering, University of Patras)
  • 투고 : 2010.09.15
  • 심사 : 2010.11.15
  • 발행 : 2011.03.25
⟨ 이전 논문 다음 논문 ⟩

초록

A new method for the seismic design of plane steel moment resisting frames is developed. This method determines the design base shear of a plane steel frame through modal synthesis and spectrum analysis utilizing different values of the strength reduction (behavior) factor for the modes considered instead of a single common value of that factor for all these modes as it is the case with current seismic codes. The values of these modal strength reduction factors are derived with the aid of a) design equations that provide equivalent linear modal damping ratios for steel moment resisting frames as functions of period, allowable interstorey drift and damage levels and b) the damping reduction factor that modifies elastic acceleration spectra for high levels of damping. Thus, a new performance-based design method is established. The direct dependence of the modal strength reduction factor on desired interstorey drift and damage levels permits the control of deformations without their determination and secures that deformations will not exceed these levels. By means of certain seismic design examples presented herein, it is demonstrated that the use of different values for the strength reduction factor per mode instead of a single common value for all modes, leads to more accurate results in a more rational way than the code-based ones.

키워드

참고문헌

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피인용 문헌

  1. Modal strength reduction factors for seismic design of steel moment resisting frames vol.154, 2018, https://doi.org/10.1016/j.engstruct.2017.10.071
  2. 13.15: Seismic design of steel moment resisting frames: Modal strength reduction factors including strength deterioration and panel zone effects vol.1, pp.2-3, 2017, https://doi.org/10.1002/cepa.438
  3. Degradation and damage behaviors of steel frame welded connections vol.15, pp.4, 2013, https://doi.org/10.12989/scs.2013.15.4.357
  4. Stochastic-based damping reduction factors vol.80, 2016, https://doi.org/10.1016/j.soildyn.2015.09.014
  5. Recovery of spectral absolute acceleration and spectral relative velocity from their pseudo-spectral counterparts vol.4, pp.5, 2013, https://doi.org/10.12989/eas.2013.4.5.489
  6. A seismic design method for reinforced concrete moment resisting frames using modal strength reduction factors pp.1573-1456, 2018, https://doi.org/10.1007/s10518-018-0436-3
  7. A comparison of three performance-based seismic design methods for plane steel braced frames vol.18, pp.1, 2011, https://doi.org/10.12989/eas.2020.18.1.027
  8. Seismic assessment of thin steel plate shear walls with outrigger system vol.74, pp.2, 2011, https://doi.org/10.12989/sem.2020.74.2.267
  9. Relationship of strength reduction factor and maximum ductility factor for seismic design of one-storey industrial steel frames vol.21, pp.5, 2020, https://doi.org/10.1007/s42107-020-00244-0
  10. State-of-the-art review: Reduction factor of traditional steel moment resisting, braced or eccentrically braced systems vol.35, pp.None, 2011, https://doi.org/10.1016/j.istruc.2021.11.028