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NTIS 바로가기한국지진공학회논문집 = Journal of the Earthquake Engineering Society of Korea, v.22 no.5, 2018년, pp.281 - 289
신지욱 (한국건설기술연구원 국민생활연구본부)
Existing reinforced concrete building structures have seismic vulnerabilities due to their seismically-deficient details resulting in non-ductile behavior. The seismic vulnerabilities can be mitigated by retrofitting the buildings using a fiber-reinforced polymer column jacketing system, which can p...
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핵심어 | 질문 | 논문에서 추출한 답변 |
---|---|---|
FRP재료의 역할은? | 는 것을 구속함에 따라 추가적인 구속력 (confining pressure, σR)을 기둥에 부여하는 역할을 한다. FRP에 의한 추가 구속력은 콘크리트 구속 압축 강도 (fcc′)와 극한 변형률 (εcu)을 증가시켜 부재의 연성 능력을 확보 할 수 있다 [9-11]. | |
과거 응답 특성과 지진 응답 조사의 한계는 무엇인가? | 철근콘크리트 건축물의 동적 응답 특성과 지진 응답을 조사하기 위한 다양한 진동대 실험이 과거에 수행되었다 [19-22]. 그러나, 대다수에 과거에 수행된 동적실험은 진동대 재원의 한계 때문에 실험체의 크기, 중량 등을 축소하여 제한적으로 실시하였다 . 또한 실제 건물의 동적 특성을 측정하여 해석모델의 보정 (calibration)을 위해 과거 연구자는 상시 미진동 및 낮은 수준의 강제 진동 (ambient and low-level forced vibration)에 대한 실물 크기의 현장 실험을 실시하였다 [23, 24]. 이러한 동적 실험의 한계를 극복하기 위한 목적으로 미국 NSF (National Science Foundation)의 NEES (George E. | |
FRP에 의한 추가 구속력은 어떻게 부재의 연성 능력을 확보하는가? | 는 것을 구속함에 따라 추가적인 구속력 (confining pressure, σR)을 기둥에 부여하는 역할을 한다. FRP에 의한 추가 구속력은 콘크리트 구속 압축 강도 (fcc′)와 극한 변형률 (εcu)을 증가시켜 부재의 연성 능력을 확보 할 수 있다 [9-11]. FRP자켓팅 시스템 (FRP column jacketing system)에서 그라 우팅 재료는 단면 형상을 정사각형/직사각형에서 원형/타원형으로 전환하는 기능을 하는데 이는 FRP에 의해 발생되는 구속 효과를 극대화하기 위함 이다 [12-14]. |
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