• 한국공간구조학회논문집
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• 제5권3호
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• pp.123-130
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• 2005

본 연구에서는 횡하중을 받는 아웃리거 시스템의 횡변위를 정량적으로 제어할 수 있는 효율적인 강성최적설계기법을 제시하고 이를 이용하여 아웃리거 시스템의 거동특성 및 효율성을 평가하고자 한다. 이를 위해 아웃리거를 이용한 고층 구조물의 거동특성을 고려한 민감도 해석을 수행하며 아울러 수학적계획법의 일반성을 유지하면서도, 큰 규모의 문제도 효율적으로 다룰 수 있는 근사화 개념을 도입하여 구속조건식을 설정한다. 특히 초기에 주어진 단면형상이 최적설계 과정동안 계속 유지된다는 가정을 이용하여 부재재설계 기법을 개발한다. 제시된 정량적인 횡변위 제어 방안의 효용성을 검토하기 위해 네 가지 형태의 50층 고층구조물 예제가 고려된다.

• 한국전산구조공학회:학술대회논문집
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• 한국전산구조공학회 2008년도 정기 학술대회
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• pp.499-504
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• 2008

Recently, the problem controlling lateral drift is important in tall buildings for improvement in economic efficiency and habitability. But, the Outrigger System, general used for tall building in Korea, has weak points with the occupancy of special space and the long duration of works. The dampers are applied to actively control building's response by earthquake and wind load in these days. Accordingly, we analyze the effect of the drift control using various dampers to substitute for the Outrigger System as the efficient system in tall buildings.

• Structural Engineering and Mechanics
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• 제40권1호
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• pp.65-84
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• 2011

In this paper a simple mathematical model for approximate static analysis of combined system of framed tube, shear core and two outrigger-belt truss structures subjected to lateral loads is presented. In the proposed methodology, framed tube is modeled as a cantilevered beam with a box section and interaction between shear core and outrigger-belt truss system with framed tube is modeled using torsional springs placed at location of outrigger-belt truss; these torsional springs act in a direction opposite to rotation generated by lateral loads. The effect of shear lag on axial deformation in flange is quadratic and in web it is a cubic function of geometry. Here the total energy of the combined system is minimized with respect to lateral deflection and rotation in plane section. Solution of the resulting equilibrium equations yields the unknown coefficients of shear lag along with the stress and displacement distributions. The results of a numerical example, 50 storey building subjected to three different types of lateral loading obtained from SAP2000 are compared to those of the proposed method and the differences are found to be reasonable. The proposed method can be used during the preliminary design stages of a tall building and can provide a better understanding of the effects of various parameters on the overall structural behavior.

• 국제초고층학회논문집
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• 제10권3호
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• pp.165-171
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• 2021

Core-outrigger-mega frame system is used in Suzhou IFS with 95-story, 450 m-tall, which is beyond Chinese code limit. Besides simple introduction on design principle, structure system and analysis, key techniques including performance based design criteria, frame shear ratio, capacity check of mega column, human comfort criteria under wind induced vibration and TSD design were presented in details for reference of similar super tall building design.

• 한국전산구조공학회논문집
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• 제21권3호
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• pp.265-273
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• 2008

최근 급속하게 증가하고 있는 초고층 건축물은 바람이나 지진에 의한 횡변위를 효율적으로 제어하는 기술이 매우 중요하다. 그러나 국내의 초고층 주거형 건축물에 주로 사용되는 횡력 저항 구조시스템인 아웃리거 시스템은 별도의 공간을 요구하여 시공이 어렵고 공사 기간이 오래 걸리는 등의 불리한 점들이 있다. 반면 근래에 사용되고 있는 제진 시스템은 동적 하중에 의한 진동에너지를 부가적인 제진장치에 집중시킴으로써 건물의 횡변위를 저감시키며, 댐퍼의 설치도 비교적 용이하다. 또한, 아웃리거 설치와 같은 횡변위 제어시스템은 강성증가로 인해 풍응답이 증가되어 거주자의 불편과 같은 사용성 문제가 발생하기도 하며 이는 다른 추가적인 제어방식을 요구하게 된다. 따라서 본 연구에서는 초고층 주거형 건축물에 대한 횡변위를 효과적으로 제어하면서 아웃리거시스템을 대체 또는 보완할 수 있는 새로운 방법으로써 다양한 제진장치를 적용하여 각각의 횡변위제어 성능을 검토해보았다.

• Structural Engineering and Mechanics
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• 제42권5호
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• pp.715-728
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• 2012

This paper deals with determining the fundamental frequency of tall buildings that consist of framed tube, shear core, belt truss and outrigger systems in which the framed tube and shear core vary in size along the height of the structure. The effect of belt truss and outrigger system is modeled as a concentrated rotational linear spring at the belt truss and outrigger system location. Many cantilevered tall structures can be treated as cantilevered beams with variable cross-section in free vibration analysis. In this paper, the continuous approach, in which a tall building is replaced by an idealized cantilever continuum representing the structural characteristics, is employed and by using energy method and Hamilton's variational principle, the governing equation for free vibration of tall building with variable distributed mass and stiffness is obtained. The general solution of governing equation is obtained by making appropriate selection for mass and stiffness distribution functions. By applying the separation of variables method for time and space, the governing partial differential equation of motion is reduced to an ordinary differential equation with variable coefficients with the assumption that the transverse displacement is harmonic. A power-series solution representing the mode shape function of tall building is used. Applying boundary conditions yields the boundary value problem; the frequency equation is established and solved through a numerical process to determine the natural frequencies. Computer program has been developed in Matlab (R2009b, Version 7.9.0.529, Mathworks Inc., California, USA). A numerical example has been solved to demonstrate the reliability of this method. The results of the proposed mathematical model give a good understanding of the structure's dynamic characteristics; it is easy to use, yet reasonably accurate and suitable for quick evaluations during the preliminary design stages.

• 국제초고층학회논문집
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• 제11권3호
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• pp.189-196
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• 2022

The practical difficulties of construction will impose many restrictions on the structural design, and the construction method can also provide unexpected ideas for solving design problems. Through the discussion of three issues closely related to construction in the structural design of Wuhan Center, this paper illustrates the importance of in-depth consideration of the construction situations in the structural design stage. The topics of "Connection between Embedded Steel Plates in Steel Plate Composite Shear Wall" and "Connection Joint between Outrigger Truss and Core Wall" are about how to facilitate on-site construction by simplifying and optimizing detail design. The topic of "Adjusting Internal Force Distribution by Optimizing Construction Sequence" is about how to make the construction process a tool for structural design.

• 국제초고층학회논문집
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• 제5권1호
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• pp.43-50
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• 2016

The reinforced-concrete multi-story shear-wall structure, which can free a building from beams and columns to allow the planning of a vast room, has increasingly been used in Japan as a high-rise reinforced-concrete structure. Since this structural system concentrates the seismic force onto multi-story shear walls inside, the bending deformation of the walls may cause excessive deformation on the upper floors during an earthquake. However, it is possible to control the bending deformation to within a certain level by setting high-strength and rigid beams (outriggers) at the top of the multi-story shear walls; these outriggers restrain the bending behavior of the walls. Moreover, it is possible to achieve high energy dissipation by placing vibration control devices on the outriggers and thus restrain the bending behavior. This paper outlines the earthquake response analysis of a high-rise residential tower to demonstrate the effectiveness of the outrigger frame incorporating vibration control devices.

• 한국전산구조공학회논문집
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• 제35권1호
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• pp.35-44
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• 2022

초고층 건물에서 수평변위 제어와 수직부재에서 발생하는 부등축소에 대한 검토가 필수적이다. 수평변위 제어를 위해 근래에 아웃리거 구조시스템과 메가 구조시스템을 횡력저항시스템으로 사용한 초고층 건물이 증가하고 있다. 또한, 부등축소로 인한 구조적 문제를 해결하기 위해 부등축소량 예측과 예측결과를 통한 시공단계에서의 보정방법이 연구되어 왔으나 부등축소에 대한 횡력저항시스템의 영향 비교는 드문 편이다. 따라서, 본 논문에서는 수평변위 제어를 위해 아웃리거 구조시스템과 메가 구조시스템을 사용한 60층 규모의 철근콘크리트 주거용 초고층 건물에 대해 시공단계해석을 통한 부등축소를 비교하고 그 영향을 분석하고자 한다. 또한, 부등축소는 비구조요소의 파손 및 구조요소에 부가하중을 유발하기도 하며 부등축소가 야기한 문제는 초고층 건물에서 중요한 부재를 손상시킬 수 있으므로 각 횡력저항시스템별로 수직부재의 부등축소에 대한 영향을 분석하였다.

• 한국공간구조학회지
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• 제11권1호
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• pp.15-21
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• 2011