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이지훈,주석준,조지성,김홍진,Lee, Jee-Hoon,Joo, Seok-Jun,Jo, Ji-Seong,Kim, Hong-Jin 대한건축학회 2011 대한건축학회논문집 Vol.27 No.3
Increasing height of tall buildings often requires supplementary damping system such as tuned mass damper (TMD) for occupant comfort in wind condition. Since the guide rail type TMD has advantages of smaller space requirement and bidirectional controllability, it is often preferred in Korea to the pendulum type TMD. For the guide rail type TMD, it is important to reduce the friction force between a moving mass and guide rails. In this paper, laminated rubber bearing is used to reduce the friction force in the guide rail type TMD. This rubber bearing also provide an additional stiffness and thereby the number of required spring can be reduced significantly. The performance of TMD is tested in factory as well as in site. It was found that the use of laminated rubber bearing reduced the friction force dramatically while the control performance target was met.
남산 케이블카의 풍진동제어를 위한 진자형 TMD의 적용
김동우(Kim Dong-Woo),주석준(Joo Seok-Jun),권준엽(Kwon Jun-Youp) 대한건축학회 2010 大韓建築學會論文集 : 構造系 Vol.26 No.2
This study aims to show the optimal parameters of pendulum type TMD for pendulum type main system and describe the application of pendulum type TMD to Namsan cable car. The pendulum type TMD shows an optimal frequency ratio greater than 1, positive phase difference to the main system, and better performance as the distance between the main system mass and the TMD mass increases. These characteristics are different from those of a parallel 2-degree of freedom system. The performance of the pendulum type TMD was proved to be successful in reducing the wind induced response by more than 50%, and it enables the cable car to be served at a higher wind speed above the wind speed regulation of 9m/s.
김동우(Kim Dong-Woo),주석준(Joo Seok-Jun),류기철(Ryu Ki-Cheol) 대한건축학회 2008 대한건축학회논문집 Vol.24 No.4
This paper presents the research results for the enhancement of the wind environment at ground-level passageway (6.0m(W)×6.0m(H)×27.0m(L)) through A-building in Seoul. The passageway was aligned with the direction of the prevailing wind without any protection and created great discomfort level. In this study, site survey and wind environment test on pedestrian level were performed to find out reasonable solution fort his problem. The extension of the passageway using wall sand the reduction of the opening was proposed as are medial method to reduce the discomfort level. Its performance was identified through the field measurement of the wind velocity after temporary construction of the proposal. Although the result of this study was limited by are medial case of wind environment on a singular building, it could be done good references for plan of high-rise building or improvement of wind environment on existing building.
이지훈(Lee Jee-Hoon),주석준(Joo Seok-Jun),조지성(Jo Ji-Seong),김홍진(Kim Hong-Jin) 대한건축학회 2011 大韓建築學會論文集 : 構造系 Vol.27 No.3
Increasing height of tall buildings often requires supplementary damping system such as tuned mass damper (TMD) for occupant comfort in wind condition. Since the guide rail type TMD has advantages of smaller space requirement and bidirectional controllability, it is often preferred in Korea to the pendulum type TMD. For the guide rail type TMD, it is important to reduce the friction force between a moving mass and guide rails. In this paper, laminated rubber bearing is used to reduce the friction force in the guide rail type TMD. This rubber bearing also provide an additional stiffness and thereby the number of required spring can be reduced significantly. The performance of TMD is tested in factory as well as in site. It was found that the use of laminated rubber bearing reduced the friction force dramatically while the control performance target was met.
황재승 ( Hwang Jae-seung ),주석준 ( Joo Seok-jun ) 한국구조물진단유지관리공학회 2002 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.6 No.2
Modal mass of structure is essential to analyze structural response under disturbance and to design the vibration control devices used to enhance the serviceability of structure. Modal mass of real structure differs from that of analytic mathematical model due to the error generated from analytical assumption and construction. In this study, a method is proposed to calculate the modal mass of real structure based on the system identification. The method is verified thorough the two examples.
허재성,박은천,이성경,이상현,김홍진,조지성,조봉호,주석준,민경원,Heo, Jae-Sung,Park, Eun-Churn,Lee, Sung-Kyung,Lee, Sang-Hyun,Kim, Hong-Jin,Jo, Ji-Seong,Cho, Bong-Ho,Joo, Seok-Jun,Min, Kyung-Won 한국전산구조공학회 2008 한국전산구조공학회논문집 Vol.21 No.2
본 연구에서는 하나의 제어장치로 서로 직교하는 2방향의 건물응답을 동시에 제어할 수 있는 동조액체질량감쇠기(Tuned Liquid Mass Damper; TLMD)를 제안하고 제어성능을 실험적으로 검증하였다. 본 연구에서 제안된 TLMD는 한 방향으로는 동조액체기둥감쇠기(Tuned Liquid Column Damper; TLCD) 내부에 채워진 액체의 운동에너지를 이용하여 구조물의 응답을 제어하게 된다. 그리고, 다른 한 방향 즉 TLCD의 직각 방향으로는 LM guide(linear motion guide) 위에 놓인 TLCD 수조와 내부의 액체의 질량을 이용하여 동조질량감쇠기(Tuned Mass Damper; TMD)로 거동하게 함으로써 구조물의 응답을 감소시킨다. 이와 같은 TLMD의 양방향 독립거동 특성을 증명하기 위해 실물크기의 구조물에 설치하여 강제진동실험을 수행하였다. 실험결과, 양방향 모두 대상 구조물의 응답을 감소시키는 것을 확인하여 제안된 TLMD의 효용성을 검증하였다. In this paper, a tuned liquid mass damper(TLMD) was proposed and experimentally investigated on its control performance, which can control bi-axial responses of building structures by using only one device. The proposed TLMD controls the structural response in a specific one direction by using a liquid sloshing of TLCD. Also, the TLMD reduces the response of structures in the other orthogonal direction by behaving as a TMD that uses mass of the container itself and liquid within container of TLCD installed on linear motion guides. Force-vibration tests on a real-sized structure installed with the TLMD were performed to verify its independent behavior in two orthogonal directions. Test results showed that the responses of a structure were considerably reduced by using the proposed TLMD and its usefulness for structural control in two orthogonal directions.