풍하중 저감을 위한 공기역학적 형상변화와 성능기반내풍설계
Aerodynamic Treatments and Performance-Based Wind Design for Mitigation of Wind Load
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초록
본 연구에서는 공기역학적 형상변화의 풍하중 저감 측면에서의 효율성을 평가하기 위해 평면의 모서리 부분이 개선된 고층 건물에 대해 사례연구 기반의 비탄성 내풍설계를 수행하였다. 비선형 시간이력해석을 통해 다양한 설계풍속 및 항복 후 강성에 대한 구조물의 응답을 산정하였으며, 최근 국내 설계기준(KDS 41)에 도입된 성능기반내풍설계 개념을 토대로 구조물의 성능을 평가하였다. 해석 결과 공기역학적 형상변화를 갖는 구조물의 경우나 성능기반내풍설계를 적용했을 경우(또는 모두에 해당할 경우) 공진성분을 줄여 구조물의 응답이 크게 감소함을 확인하였다.
Abstract
In order to assess the effectiveness of aerodynamic treatments in mitigating wind load, this study used case study-based inelastic wind design on high-rise buildings with aerodynamically enhanced plane corners. The response of the structures to different design wind speeds and post yield stiffness were calculated through nonlinear time history analysis, and the structural performance was evaluated using performance-based wind design (PBWD) concept in the Korean design standard (KDS 41). The analysis revealed that when the resonance component can be lowered in the case of a structure with aerodynamic treatments and/or with the application of PBWD, the structural response dramatically decreased.
참고문헌 (15)
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