Journal of the Earthquake Engineering Society of Korea (한국지진공학회논문집)

Earthquake Engineering Society of Korea (한국지진공학회)
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Shaking Table Test for Analysis of Effect on Vibration Control of the Piping System by Steel Coil Damper

강재 코일 댐퍼의 배관시스템 진동제어 효과 분석을 위한 진동대시험

  • Received : 2021.11.05
  • Accepted : 2021.12.08
  • Published : 2022.01.01
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Abstract

Many piping systems installed in the power plant are directly related to the safety and operation of the plant. Various dampers have been applied to the piping system to reduce the damage caused by earthquakes. In order to reduce the vibration of the piping system, this study developed a steel coil damper (SCD) with a straightforward structure but excellent damping performance. SCD reduces the vibration of the objective structure by hysteretic damping. The new SCD damper can be applied to high-temperature environments since it consists of steel members. The paper introduces a design method for the elastoplastic coil spring, which is the critical element of SCD. The practical applicability of the design procedure was validated by comparing the nonlinear force-displacement curves calculated by design equations with the results obtained from nonlinear finite element analysis and repeated loading test. It was found that the designed SCD's have a damping ratio higher than 25%. In addition, this study performed a set of seismic tests using a shaking table with an existing piping system to verify the vibration control capacity on the piping system by SCD. Test results prove that the SCD can effectively control the displacement vibration of the piping system up to 80%.

Keywords

Acknowledgement

본 연구는 2018년도 산업통상자원부의 재원으로 한국에너지기술평가원(KETEP)의 원자력핵심기술개발사업의 지원(No. 20181520102780)을 받아 수행한 연구과제입니다.

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