• Title/Summary/Keyword: 근사화 개념

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A Study on Quantitative Lateral Drift Control of Tall Steel Braced Frames subject to Horizontal Loads (수평하중을 받는 고층철골가새골조의 정량적인 횡변위제어에 관한 연구)

  • Kim, Ho-Soo;Lee, Han-Joo
    • Journal of Korean Society of Steel Construction
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    • v.12 no.4 s.47
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    • pp.397-406
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    • 2000
  • This study presents an effective optimal technique to control quantitatively lateral drift for tall steel braced frames subject to horizontal loads. In this paper, the displacement sensitivity depending on behavior characteristics of steel braced frames is established, and also the approximation concept that has the generality of the mathematical programming and can efficiently solve large scale problems is introduced. Especially, the commercially available standard steel sections are used for the discrete selection of member sizes. Three types of 12-story braced frames and a 30-story braced framework are presented to illustrate the features of the quantitative lateral drift control technique proposed in this study.

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Quantitative Lateral Drift Control of RC Tall Frameworks using Dynamic Displacement Sensitivity Analysis (동적 변위민감도 해석을 이용한 고층 RC 골조구조물의 정량적인 횡변위 제어 방안)

  • Lee, Han-Joo;Kim, Ho-Soo
    • Journal of Korean Association for Spatial Structures
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    • v.6 no.3 s.21
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    • pp.103-110
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    • 2006
  • This study presents a technique to control quantitatively lateral drift of RC tall frameworks subject to lateral loads. To this end, lateral drift constraints are established by introducing approximation concept that preserves the generality of the mathematical programming and can efficiently solve large scale problems. Also the relationships of sectional properties are established to reduce the number of design variables and resizing technique of member is developed under the 'constant-shape' assumption. Specifically, the methodology of dynamic displacement sensitivity analysis is developed to formulate the approximated lateral displacement constraints. Three types of 10 and 50 story RC framework models are considered to illustrate the features of dynamic stiffness-based optimal design technique proposed in this study.

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Classification of Delirium Patients Using Local Covering Based Rule Acquisition Approach (로컬 커버링 규칙 획득기법을 활용한 섬망 환자의 분류)

  • Son, Chang-Sik;Kang, Won-Seok;Lee, Jong-Ha;Moon, Kyoung-Ja
    • Proceedings of the Korea Information Processing Society Conference
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    • 2019.10a
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    • pp.864-867
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    • 2019
  • 본 연구에서는 러프 근사화 개념을 활용하여 섬망 환자를 사전에 구별할 수 있는 임상적 지식을 유도할 수 있는 방법을 제안하였다. 실험 결과에서는 평균 섬망기간이 13일 이상 유지되는 6가지 임상적 분류기준을 유도하였고, 통계적 5겹 교차검정 실험을 통해 73%의 분류 성능을 제공함을 확인하였다.

Lateral Drift Control of 3-D Steel Structures Using Approximation Concept (근사화 개념을 이용한 삼차원 철골조 구조물의 횡변위 제어에 관한 연구)

  • Lee, Han-Joo;Lim, Young-Do;Kim, Ho-Soo
    • 한국공간정보시스템학회:학술대회논문집
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    • 2004.05a
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    • pp.96-102
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    • 2004
  • This study presents an effective stiffness-based optimal technique to control quantitatively lateral drift for 3-D steel frameworks subject to lateral loads. To this end, the displacement sensitivity depending on behavior characteristics of 3-D steel frameworks is established. Also, approximation concept that can preserve the generality of the mathematical programming and can efficiently solve large scale problems is introduced. Resizing sections in the stiffness-based optimal design are assumed to be uniformly varying in size. Two types of 30-story frames are presented to illustrate the features of the Quantitative lateral drift control technique proposed in this study.

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Structural Behavior Characteristics and Efficiency Evaluation of Outrigger System using Stiffness-Based Optimal Design Technique (강성최적설계법을 이용한 아웃리거 시스템의 거동특성 및 효율성 평가)

  • Kim, Ho-Soo;Lee, Han-Joo
    • Journal of Korean Association for Spatial Structures
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    • v.5 no.3 s.17
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    • pp.123-130
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    • 2005
  • This study presents an effective stiffness-based optimal technique to control quantitatively lateral drift and evaluate the structural behavior characteristics and efficiency for tall outrigger system subject to lateral loads. To this end, displacement sensitivity depending on behavior characteristics of outrigger system is established and approximation concept that preserves the generality of the mathematical programming and can efficiently solve large scale problems is introduced. Specifically, under the 'constant-shape' assumption, resizing technique of member is developed. Four types of 50 story frameworks are presented to illustrate the features of the quantitative lateral drift control technique proposed in this study.

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A Study on Stiffness-based Optimal Design of Tall Plane Frameworks using Composite Member (합성부재를 이용한 고층평면골조의 강성최적설계에 관한 연구)

  • Kim, Ho-Soo;Lee, Han-Joo
    • Journal of Korean Association for Spatial Structures
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    • v.4 no.3 s.13
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    • pp.77-84
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    • 2004
  • This study presents an effective stiffness-based optimal technique to control quantitatively lateral drift for tall frameworks using composit member subject to lateral loads. To this end, displacement sensitivity depending on behavior characteristics of tall frameworks is established and approximation concept that preserves the generality of the mathematical programming and can efficiently solve large scale problems is introduced. Specifically, under the 'constant-shape' assumption, resizing techniqe of composite member is developed. Two types of 50 story frameworks are presented to illustrate the features of the quantitative lateral drift control technique proposed in this study.

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