Estimation of Aseismatic Performance of Laminated Rubber Bearing Through Shaking Table Tests

진동대 실험을 통한 적층고무받침의 내진성능 평가

  • 박성규 (대구대학교 토목공학과)
  • Received : 2010.03.17
  • Accepted : 2010.07.05
  • Published : 2010.08.26

Abstract

This paper was investigated on the laminated rubber bearing, which mitigates damages of bridges from threat of earthquakes. Laminated rubber bearing can bear large loads for long periods of time and be capable of large deformations during an earthquake. To evaluate seismic isolation with laminated rubber bearing on several earthquake waves, we performed a shaking table test. In this test, deck acceleration was measured by accelerometers and shear force on piers was surveyed by load cells. Furthermore, seismic capacity of isolated systems with laminated rubber bearing was compared with non-isolated systems through shaking table test. The results show that deck acceleration and shear force were relatively reduced by laminated rubber bearing.

본 논문은 적층고무받침을 이용하여 지진으로부터 교량의 손상피해를 줄이기 위한 연구이다. 적층고무 받침은 지진 발생시 변위를 증가시키고, 주기를 길게하여 하중을 전환시킨다. 적층고무받침과 같은 면진장치에 몇 가지 지진파를 가진하여 진동대 실험을 하였다. 이 실험에서는 가속도계와 하중계, 변위계를 설치하여 상판의 가속도 및 전단력 등을 측정하였다. 더구나 적층고무받침을 설치한 경우와 지진격리장치를 설치하지 않은 경우로 구분하여 진동대 실험하여 그 성능을 비교 평가하였다. 실험결과 상판의 가속도 및 전단력은 적층고무받침을 사용할 경우 응답이 감소하였다.

Keywords

References

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