Earthquakes and Structures

  • 제15권3호
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  • Pages.319-334
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  • 2018
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  • 2092-7614(pISSN)
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  • 2092-7622(eISSN)
테크노프레스 (Techno-Press)
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DOI QR코드

DOI QR Code

Effects of the isolation parameters on the seismic response of steel frames

  • Deringol, Ahmet H. (Department of Civil Engineering, Gaziantep University) ;
  • Bilgin, Huseyin (Department of Civil Engineering, Epoka University)
  • 투고 : 2017.06.21
  • 심사 : 2018.07.18
  • 발행 : 2018.09.25
⟨ 이전 논문 다음 논문 ⟩

초록

In this paper, an analytical study was carried out to propose an optimum base-isolated system for the design of steel structures equipped with lead rubber bearings (LRB). For this, 5 and 10-storey steel moment resisting frames (MRFs) were designed as Special Moment Frame (SMF). These two-dimensional and three-bay frames equipped with a set of isolation systems within a predefined range that minimizes the response of the base-isolated frames subjected to a series of earthquakes. In the design of LRB, two main parameters, namely, isolation period (T) and the ratio of strength to weight (Q/W) supported by isolators were considered as 2.25, 2.5, 2.75 and 3 s, 0.05, 0.10 and 0.15, respectively. The Force-deformation behavior of the isolators was modelled by the bi-linear behavior which could reflect the nonlinear characteristics of the lead-plug bearings. The base-isolated frames were modelled using a finite element program and those performances were evaluated in the light of the nonlinear time history analyses by six natural accelerograms compatible with seismic hazard levels of 2% probability of exceedance in 50 years. The performance of the isolated frames was assessed in terms of roof displacement, relative displacement, interstorey drift, absolute acceleration, base shear and hysteretic curve.

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피인용 문헌

  1. Seismic behavior of MSCSS based on story drift and failure path vol.18, pp.8, 2018, https://doi.org/10.1590/1679-78256787