The purpose of this paper is to search the optimal location of offset outrigger system in high-rise building after a structural schematic design of 80 stories building was conducted, making use of MIDAS-Gen. In this research, the key factors of analysis study were column stiffness, outrigger position in plan and outrigger location in height. For the aim of finding out the optimum position of offset outrigger system in tall building, we studied the lateral displacement in top floor which is the very essential variables in the structural design of high-rise building. The results of study showed that the column stiffness, the outrigger location in plan and outrigger location in height had an effect on the optimal position of outrigger system. Also, it is indicated that the research results can be useful in acquiring the structural design materials for seeking the optimum position of offset outrigger system in tall building.

In this study, it was modelled high-rise building applying outrigger damper system and analyzed by applying eccentric load. By controlling the variation of damping and stiffness of the damper, the seismic response control performance of outrigger damper system was analysed. An outrigger damper system is effective in controlling the top floor displacement response and torsional angle. Therefore, the damper should be selected the proper stiffness value because the variation of stiffness have an influence on the torsional angle.

This study intended to analyze an influence of the structure elements on the optimal location for one-outrigger system in tall building by using MIDAS-Gen. In this investigation, the analysis parameters were the outrigger position and the stiffness of main structure elements such as shear walls, outrigger systems, exterior columns connected in outrigger system and frames not to be connected in outrigger system. For the objective of finding out the optimal location for one-outrigger system in high-rise building, we studied the lateral displacement in top level of 80 stories building. The results of this study indicated that the outrigger location and the stiffness of main structure elements such as shear walls, outrigger systems, exterior columns connected in outrigger system and frames not to be connected in outrigger system had an influence on the optimal location of one-outrigger system. In addition, it is showed that the research results can be very useful in obtaining the structure design data for looking for the optimal location of one-outrigger system in high-rise building.

본 연구는 구조해석 프로그램 MIDAS-Gen을 사용하여 80층 건물의 구조분야에 대한 계획설계를 실시한 후에 캡 트러스가 설치된 초고층건물의 아웃리거 구조의 최적위치에 대하여 연구하는 것을 목적으로 하였다. 이 논문에서 구조해석의 주요한 변수는 아웃리거 위치와 주요한 구조요소 (아웃리거, 외곽기둥, 전단벽 등)의 강성이다. 캡 트러스가 설치된 초고층건물의 아웃리거 구조의 최적위치를 찾기 위하여초고층건물의 구조설계에서 가장 중요하게 고려해야하는 요소의 하나인 최상층의 수평변위를 분석하고 고찰하였다. 본 연구의 결과, 아웃리거 위치와 아웃리거, 외곽기둥, 전단벽과 같은 주요한 구조요소의 강성은 최적의 아웃리거 위치에 영향을 주는것으로 나타났다. 그리고 본 연구의 결과는 초고층건물의 수평변위를 최소화시키는 최적의 아웃리거 위치를 결정할 수 있는 기본적인 엔지니어링 자료를 제공하는 것으로 나타났다.