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박창현,안희재,최동훈,정철규,Park, Chang-Hyun,Ahn, Hee-Jae,Choi, Dong-Hoon,Jung, Cheul-Kyu 한국전산구조공학회 2010 한국전산구조공학회논문집 Vol.23 No.5
본 논문에서는 중력하중 및 풍하중, 지진하중을 받는 지상 8층, 지하 3층의 RC(Reinforced Concrete) 빌딩 시공에 필요한 부재의 재료비를 줄이기 위해 중량을 감소시키는 구조 최적설계를 수행한다. 이를 위해 설계요구사항을 바탕으로 부재의 부피를 최소화하는 설계변수값을 찾기 위한 설계문제를 정식화한다. 최적설계 수행을 위해 상용 PIDO(Process Integration and Design Optimization) 툴인 PIAnO(Process Integration, Automation and Optimization)에서 제공하는 다양한 설계기법들을 이용한다. 먼저 실험계획법(Design of Experiments; DOE)을 이용하여 실험계획을 세우고, 실험점에 따라 건축분야 범용 구조해석 프로그램인 MIDAS Gen을 사용하여 구조해석을 수행한다. 그리고 해석결과를 바탕으로 각 응답에 대한 근사모델을 생성한 후 근사모델의 예측성능을 평가한다. 예측성능이 검증된 근사모델과 최적화기법을 이용하여 최적설계를 수행하고, 설계조건을 만족하면서 부재의 부피를 최소화하는 최적 설계변수값을 도출함으로서 본 논문에서 제안된 설계방법의 유효성을 보이고자 한다. Structural optimization is performed to minimize the weight of a RC building structure, which has eight floors above ground and three underground, under gravity, wind, and seismic loads. Design optimization problem is formulated to find the values of the design variables that minimize the volume while satisfying various design and side constraints. To solved the optimization problem posed, several design techniques equipped in PIAnO, a commercial PIDO tool, are used. DOE is used to generate training points and structural analysis is performed using MIADS Gen, a general-purpose structural analysis CAE tool. Then, meta-models are generated from structural analysis results and accuracies of meta-models are evaluated. Next, design optimization is performed by using the verified meta-models and optimization technique equipped in PIAnO. Finally, we obtained optimal results, which could demonstrate the effectiveness of our design method.
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이유미(Yi Yu-Mi),정철규(Jung Cheul-Kyu),유석형(Yoo Suk-Hyeong),신성우(Shin Sung-Woo) 대한건축학회 2007 大韓建築學會論文集 : 構造系 Vol.23 No.10
Shear wall system with outrigger is most popular structural system for controlling lateral displacement of tall buildings. This system have core wall, outriggers, external walls, internal walls, and partition walls called structural elements. For the control of top drift in tall building structure under lateral loads is the right way that increase thickness of core wall and a number of outrigger. However, numbers of outrigger require excessive construction duration and quantity of resource and using area is on the decrease owing to thick core wall. Also, there is no practical and economic guidelines for adequate design of structural elements to resist lateral loads, except outrigger and core wall. On this account, it is necessary to investigate the effects of structural elements and interaction of each wall element to lateral displacement. In this study, thickness of structural wall as well as core wall, outrigger, interaction of each wall, and design strength are used as design variables. Analysis of example structures which are a plane figure on Y type and 60 stories shear wall-outrigger system were performed and compared top drift along design variables. As results, structural elements are effective factors to control lateral displacement and core wall-external wall integration is optimum system.
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바닥 브레이스를 이용한 초고층건축물의 횡변위 제어에 관한 연구
이현지(Lee Hyun-Jee),정철규(Jung Cheul-Kyu),신성우(Shin Sung-Woo),이광수(Lee Kwang-Soo) 대한건축학회 2011 大韓建築學會論文集 : 構造系 Vol.27 No.9
Present control system of lateral displacement for super tall building has problems as follows, stress concentrate on some floor, shear lag, restriction on architectural design, etc. Thus in spite of superior structural ability the efficiency of system is so lessened. This study is about the system that using X type floor brace, for the purpose of lateral displacement control. This system is a method that distribute lateral loads equally inner wall. According to analysis result, floor brace system have equal lateral displacement control ability of outrigger system, by control of floor brace shape, arrangement, stiffness.
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박창현,안희재,최동훈,정철규,Park, Chang-Hyun,Ahn, Hee-Jae,Choi, Dong-Hoon,Jung, Cheul-Kyu 한국전산구조공학회 2011 한국전산구조공학회논문집 Vol.24 No.2
본 논문에서는 수직하중, 풍하중 및 지진하중에 의해 발생하는 변위 관련 구속조건을 만족하면서 RC(Reinforced Concrete) 빌딩 구조의 부피를 최소화하기 위한 설계문제를 정식화하였다. 구조해석 절차 자동화의 어려움으로 인해 실험 계획법과 근사화기법, 최적화기법을 이용한 근사모델기반 최적설계를 수행하였다. 특히, 만족할 만한 설계 결과를 얻을 때까지 설계변수의 범위와 구속조건의 허용값을 조정하는 단계적 최적설계 방법을 제안하였다. 제안된 단계적 최적설계 방법을 통해 주어진 구속조건을 모두 만족하면서 RC 빌딩 구조의 부피를 초기 설계 대비 53.3% 감소시키는 결과를 얻음으로 써 본 논문에서 보인 단계적 최적설계 방법의 타당성을 보였다. A design optimization problem was formulated to minimize the volume of an RC building structure while satisfying design constraints on structural displacements under vertical, wind and seismic loads. We employed metamodel-based design optimization using design of experiments, metamodeling and optimization algorithm to circumvent the difficulty of the automation of structural analysis procedure. Especially, we proposed a design approach of repetitive design optimizations by stages with changing the side constraint values on design variables and limit values on design constraints until a satisfactory design result was obtained. Using the proposed design approach, the volume of the RC building structure has been reduced by 53.3 % compared to the initial one while satisfying all the design constraints. This design result clearly shows the validity of the proposed design approach.
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이유미(Yi Yu-Mi),정재형(Jung Jae-Hyung),정철규(Jung Cheul-Kyu),유석형(Yoo Suk-Hyeong),신성우(Shin Sung-Woo) 대한건축학회 2007 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.27 No.1
Shear wall system with outrigger, most popular structural system for controlling lateral displacement of tall buildings, is core wall, outriggers, external walls, internal walls, and partition walls called structural elements. The studies on the capacities of outrigger and core wall have been advanced. However structural elements except for that have no practical and economic guidelines for adequate design to resist lateral loads. On this account, it is necessary to investigate the effects of interaction of each wall element to lateral displacement. In this study, thickness of structural wall as well as core wall, outrigger, interaction of each wall, and design strength are used as design variables. Analysis of example structures which are a plane figure on Y type and 60 stories shear wall-outrigger system were performed and compared top drift along design variables. As results, structural elements are effective factors to control lateral displacement and core wall-external wall integration is optimum system.
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