Earthquakes and Structures

  • 제12권5호
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  • Pages.515-527
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  • 2017
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  • 2092-7614(pISSN)
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  • 2092-7622(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

The effect of mainshock-aftershock on the residual displacement of buildings equipped with cylindrical frictional damper

  • Mirtaheri, Masoud (Civil Engineering Faculty, K. N. Toosi University of Technology) ;
  • Amini, Mehrshad (Civil Engineering Faculty, K. N. Toosi University of Technology) ;
  • Rad, Moosa Doosti (Civil Engineering Faculty, K. N. Toosi University of Technology)
  • 투고 : 2016.11.19
  • 심사 : 2017.04.25
  • 발행 : 2017.05.25
⟨ 이전 논문 다음 논문 ⟩

초록

Recently, Friction dampers become popular due to the desirable performance in the energy dissipation of lateral loads. A lot of research which has been conducted on these dampers results in developing friction dampers with low sensitivity to the number of cycles and temperature increases. Friction dampers impose high residual drifts to the buildings because of low post-yield stiffness of the damper which results from increasing lateral displacement and period of buildings. This issue can be more critical under strong aftershocks which results in increasing of structural damages. In this paper, in addition to the assessment of aftershock on steel buildings equipped with friction dampers, methods for controlling residual drifts and decreasing the costs of retrofitting are investigated. Utilizing rigid connections as a lateral dual system and activating lateral stiffness of gravity columns by adding elastic braces are as an example of effective methods investigated in this research. The results of nonlinear time history analyses on the low to medium rise steel frames equipped with friction dampers illustrate a rise in residual drifts as the result of aftershocks. In addition, the results show that different slip loads of friction damper can affect the residual drifts. Furthermore, elastic stories in comparison to rigid connections can reduce residual drifts of buildings in an effective fashion, when most slip loads of friction dampers are considered.

키워드

참고문헌

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피인용 문헌

  1. Effects of Aftershocks on the Potential Damage of FRP-Retrofitted Reinforced Concrete Structures vol.18, pp.11, 2017, https://doi.org/10.1007/s40999-020-00533-4
  2. Seismic retrofit of structures using rotational friction dampers with restoring force vol.23, pp.16, 2017, https://doi.org/10.1177/1369433220939213
  3. Evaluation of seismic performance of rotational-friction slip dampers in near-field and far-filed earthquakes vol.21, pp.2, 2017, https://doi.org/10.12989/eas.2021.21.2.147