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Effects of damping ratio on dynamic increase factor in progressive collapse

  • Mashhadi, Javad (Department of Civil Engineering, Shahid Bahonar University of Kerman) ;
  • Saffari, Hamed (Department of Civil Engineering, Shahid Bahonar University of Kerman)
  • 투고 : 2016.06.16
  • 심사 : 2016.10.23
  • 발행 : 2016.10.30

초록

In this paper, the effect of damping ratio on nonlinear dynamic analysis response and dynamic increase factor (DIF) in nonlinear static analysis of structures against column removal are investigated and a modified empirical DIF is presented. To this end, series of low and mid-rise moment frame structures with different span lengths and number of storeys are designed and the effect of damping ratio in DIF is investigated, performing several nonlinear static and dynamic analyses. For each damping ratio, a nonlinear dynamic analysis and a step by step nonlinear static analysis are carried out and the modified empirical DIF formulas are derived. The results of the analysis reveal that DIF is decreased with increasing damping ratio. Finally, an empirical formula is recommended that relates to damping ratio. Therefore, the new modified DIF can be used with nonlinear static analysis instead of nonlinear dynamic analysis to assess the progressive collapse potential of moment frame buildings with different damping ratios.

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참고문헌

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피인용 문헌

  1. Modification of dynamic increase factor to assess progressive collapse potential of structures vol.138, 2017, https://doi.org/10.1016/j.jcsr.2017.06.038
  2. Effects of Postelastic Stiffness Ratio on Dynamic Increase Factor in Progressive Collapse vol.31, pp.6, 2017, https://doi.org/10.1061/(ASCE)CF.1943-5509.0001109
  3. Free vibrations of precast modular steel-concrete composite railway track slabs vol.24, pp.1, 2016, https://doi.org/10.12989/scs.2017.24.1.113
  4. Effects of finite element modeling and analysis techniques on response of steel moment-resisting frame in dynamic column removal scenarios vol.19, pp.3, 2018, https://doi.org/10.1007/s42107-018-0027-2
  5. Evaluation of dynamic increase factor in progressive collapse analysis of steel frame structures considering catenary action vol.30, pp.3, 2019, https://doi.org/10.12989/scs.2019.30.3.253
  6. Progressive collapse analysis of stainless steel composite frames with beam-to-column endplate connections vol.36, pp.4, 2020, https://doi.org/10.12989/scs.2020.36.4.427
  7. Seismic progressive collapse mitigation of buildings using cylindrical friction damper vol.20, pp.1, 2021, https://doi.org/10.12989/eas.2021.20.1.001
  8. Evaluation of equivalent friction damping ratios at bearings of welded large-scale domes subjected to earthquakes vol.40, pp.4, 2021, https://doi.org/10.12989/scs.2021.40.4.517
  9. Machine learning applications for assessment of dynamic progressive collapse of steel moment frames vol.36, pp.None, 2022, https://doi.org/10.1016/j.istruc.2021.12.067