• 제목/요약/키워드: Dynamic Displacement Sensitivity

검색결과 3건 처리시간 0.06초

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

  • 이한주;김호수
    • 한국공간구조학회논문집
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    • 제6권3호
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    • pp.103-110
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    • 2006
  • 본 연구에서는 지진하중을 받는 고층 RC 골조구조물의 횡변위를 정량적으로 제어할 수 있는 방안을 제시한다. 이를 위해 수학적인 일반성을 가지면서 큰 규모의 문제도 효율적으로 다룰 수 있는 근사화 개념을 도입하여 횡변위 구속조건식을 설정한다. 아울러 구조부재의 단면특성 관계식을 설정함으로써 설계변수의 수를 줄여주고, 초기에 주어진 단면형상이 최적설계 과정동안 계속 유지된다는 가정을 이용하여 최적설계결과에서 구해진 단면특성에 따라 부재단면크기를 산출하는 방안을 강구한다. 특히 근사화된 횡변위구속조건식을 정식화 하기 위해 동적 변위민감도해석 방안이 고려된다. 이와 같이 제시된 동적 강성최적설계 기법의 효용성을 검토하기 위해 10층과 50층 규모의 삼차원 RC 골조구조물 모델이 고려된다.

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골조-전단벽 구조물의 횡변위제어를 위한 동적 민감도 해석 (Dynamic Sensitivity Analysis For Lateral Drift Control Of Frame-Shear Wall Structures)

  • 이한주;김지연;한승백;남경연;김호수
    • 한국전산구조공학회:학술대회논문집
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    • 한국전산구조공학회 2007년도 정기 학술대회 논문집
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    • pp.571-576
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    • 2007
  • This study presents stiffness-based optimal design to control quantitatively lateral drift of frame-shear wall structures subject to seismic 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. The 12 story frame-shear wall structural models is considered to illustrate the features of dynamic stiffness-based optimal design technique proposed in this study.

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가진력과 단면형상 변화에 따른 외팔보 감쇠 진동의 민감도 해석 (Sensitivity Analysis of Dynamic Response by Change in Excitation Force and Cross-sectional Shape for Damped Vibration of Cantilever Beam)

  • 윤성호
    • 한국기계가공학회지
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    • 제20권8호
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    • pp.11-17
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    • 2021
  • This paper describes the time rate of change of dynamic response of a cantilever beam inserted with a damping element, such as bonding, which is excited under a general force at various locations. A sensitivity analysis was performed in a finite element model to show that two types of second-order algebraic governing equations were used to predict the rate of change of dynamic displacement: one is related to the modal coordinate linked to a physical coordinate, and the other to the design parameter of the time rate of change of displacement. The sensitivity differential equation formulation includes more complicated terms compared with that of the undamped cantilever beam. The sensitivities of the dynamic response were observed by changing the location of the excitation force, displacement extraction, and cross-sectional area of the beam. The analytical results obtained by this suggested theory showed a relatively good agreement when compared with those obtained using the commercial finite element program. The suggested analysis procedure enables the prediction of the response sensitivity for any finite element model of the dynamic system.