철근 콘크리트 슬래브의 디자인이 동적 거동에 미치는 영향
Effects of Design on the Dynamic Response of Reinforced Concrete Slabs
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초록
본 연구의 목적은 주변고정 철근 콘크리트 슬래브의 디자인에 따른 동적거동 특성을 규명하기 위한 것으로 이를 위하여 해석방법으로는 유한요소법이 사용되었다. 철근 콘크리트 슬래브의 이산화에는 분산 철근층을 갖는 20 절점 비선형 입체 유한요소모델이 채용되었다. 몇 가지의 수치 예를 통하여 철근의 배근깊이, 철근의 배치 방법, 철근층의 두께 및 배근각도, 슬래브 두께 및 슬래브 지간비 등에 따른 철근콘크리트 슬래브의 처짐의 동적 거동 특성을 알아보았다.본 연구에서 얻어진 주요한 결론은 다음과 같다.
Abstract
This paper is on the research of the special character of the dynamic response according to a design of the clamped reinforced concrete slab. In this study, the 20-node solid element has been used to analyze the dynamic characteristics of RC slabs with clamped edges. The elasto-visco plastic model for material non-linearity and the smeared crack model have been adopted in the finite element formulation. The design factor, which affect the dynamic response of the reinforced concrete slab, are the steel layer thickness, steel layer depth, steel layout method, steel layout angle and the slab thickness and span ratio. The main purpose of this study was to find out the dynamic response of the reinforced concrete slab according to above variables. The reduction of deflection/thickness ratio appeared less than 2% when the slab thickness between 20 and 21cm. It is desirable that the slab thickness must be above 20-21cm. The reduction ratio of deflection is appeared greatly when the value of the span/thickness ratio is between 25 and 30. In conclusion, the steel layer depth and thickness had a little effect on deflection of the dynamic response, but had no effect on the steel layout angle.
참고문헌 (10)
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