Structural Engineering and Mechanics

  • 제28권1호
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  • Pages.89-105
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  • 2008
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  • 1225-4568(pISSN)
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  • 1598-6217(eISSN)
테크노프레스 (Techno-Press)
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DOI QR코드

DOI QR Code

Soil interaction effects on the performance of compliant liquid column damper for seismic vibration control of short period structures

  • Ghosh, Ratan Kumar (Department of Civil Engineering, Bengal Engineering & Science University) ;
  • Ghosh, Aparna Dey (Department of Civil Engineering, Bengal Engineering & Science University)
  • 투고 : 2006.04.25
  • 심사 : 2007.09.18
  • 발행 : 2008.01.10
⟨ 이전 논문 다음 논문 ⟩

초록

The paper presents a study on the effects of soil-structure-interaction (SSI) on the performance of the compliant liquid column damper (CLCD) for the seismic vibration control of short period structures. The frequency-domain formulation for the input-output relation of a flexible-base structure with CLCD has been derived. The superstructure has been modeled as a linear, single degreeof-freedom (SDOF) system. The foundation has been considered to be attached to the underlying soil medium through linear springs and viscous dashpots, the properties of which have been represented by complex valued impedance functions. By using a standard equivalent linearization technique, the nonlinear orifice damping of the CLCD has been replaced by equivalent linear viscous damping. A numerical stochastic study has been carried out to study the functioning of the CLCD for varying degrees of SSI. Comparison of the damper performance when it is tuned to the fixed-base structural frequency and when tuned to the flexible-base structural frequency has been made. The effects of SSI on the optimal value of the orifice damping coefficient of the damper has also been studied. A more convenient approach for designing the damper while considering SSI, by using an established model of a replacement oscillator for the structure-soil system has also been presented. Finally, a simulation study, using a recorded accelerogram, has been carried out on the CLCD performance for the flexible-base structure.

키워드

참고문헌

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  2. Inelastic design of high-axially loaded concrete columns in moderate seismicity regions vol.39, pp.4, 2008, https://doi.org/10.12989/sem.2011.39.4.559
  3. Concurrent flexural strength and deformability design of high-performance concrete beams vol.40, pp.4, 2008, https://doi.org/10.12989/sem.2011.40.4.541