중심가새골조의 내진성능향상을 위한 전단항복댐퍼의 개발
Development of a Shear Yielding Steel Damper for Concentrically Braced Frames
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초록
본 논문에서는 중심가새골조의 내진성능 향상을 위한 전단항복 댐퍼의 개발을 수행하였다. 실용성이 높은 댐퍼의 개발을 위해서구조적 간결성과 내진성능의 신뢰도에 중점을 둔 상세를 제시하기 위해 노력하였다. 지진 발생 시 에너지 소산 메커니즘에 대한 신뢰도가 높고, 지진 발생 후 항복 부위의 교체가 쉬운 형태로 고안되었다. 댐퍼의 끼움강판 치수를 변경함으로써 전단, 휨-전단, 휨 메커니즘을 조절하여 설계할 수 있다. 비선형 유한요소해석을 통해서 댐퍼의 항복 메커니즘에 따른 구조적 거동을 분석하였고, 전단항복 메커니즘 댐퍼가 휨항복 메커니즘 댐퍼에 비해 강성, 강도, 에너지 소산 측면에서 우수한 성능을 가지고 있음을 확인하였다.
Abstract
In this study, the use of a steel yielding damper is considered as an appropriate method to enhance the behavior of CBFs and a steel damperwhich is economical and straightforward to construct and replace after a severe earthquake is developed. The proposed damper wasinvestigated experimentally and numerically. In addition, a parametric study was performed to evaluate the effect of the three types of dampermechanisms (shear, shear-flexural, and flexural) on the behavior of the proposed damper. The experimental results, as well as the numericalresults, indicate that the shear damper exhibits better performance than the other dampers in terms of strength and stiffness.
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