In this study, a rocking behavior experiment using a guide plate and a guide channel to prevent lateral deformation of a steel damper was planned. For this purpose, strut I-type specimen I-1 and strut S-type specimen S-1 were prepared. The experimental results were compared with the existing experimental results of SI-260 and SS-260 under the same conditions without the details of lateral deformation prevention in order to evaluate the effect of preventing lateral deformation. The damper with lateral deformation prevention detail was evaluated to have superior strength capacity, deformation capacity, and energy dissipation capacity than the damper without it. Therefore, the lateral deformation prevention detail was evaluated to have a good effect in improving the design capability of the steel damper.

The performance enhancement of various damping systems from natural hazards has become an highly important issue in engineering field. In this paper, ENTA hysteretic dampers were tested under cyclic loadings to evaluate their performance in terms of ductility and energy dissipation. The test results showed that the hysteretic dampers are effective damping systems to enhance the buildings performance for remodeling and retrofit of buildings. Also, the hysteretic dampers were modeled in FEM(Finite Element Method) structural analysis program. As comparing the computer modeling and the experiment, this study model reflects the nonlinear behavior of steel and derives the hysteresis loop.

This study aims at developing a new shape damper and suggestion for seismic silo structure, which contribute to increase significantly seismic performance and constructional efficiency. The suggested N.B.B.D system is more likely to adoptable because it remarkably contribute to save inter-story drift also to have many advantages compared with conventional X or K type braced frame.

In this paper, various dynamic model of magnetorheological (MR) damper, is required for describing the hysteresis of MR damper and for their application are investigated to structural control. The dynamic characteristics and control effects of the modeling methods for MR dampers such as Bingham, biviscous, hysteretic biviscous, simple Bouc-Wen, Bouc-Wen with mass element, and phenomenological models are studied. Of these models, hysteretic biviscous model which is simple and describes the hysteretic characteristics, is chosen for numerical studies. The capacity of MR damper is determined as a portion of not the building weight but the lateral restoring force.

기존 골조구조물의 횡 변위 조절이 가능한 댐퍼 시스템을 개발하기 위한 목적으로 상세개발 및 성능실험을 실시하였다. 개발 상세는 기둥간 보의 변형을 방지하기 위하여 고안된 ALD및 층간변위를 제어하기 위하여 고안된 AWD로 구분되며, 기존 연구결과의 비보강 BF를 비교대상으로 사용하였다. 파괴양상, 하중-변위 곡선, 포락선, 최대강도, 강성저하 및 에너지 소산능력 등을 비교 평가하였으며, ALD 및 AWD 의 내진보강효과를 확인할 수 있었다. 또한 아라미드 시트로 기둥을 구속하는 공법이 내진성능 향상에 매우 우수함을 확인하였다.

To evaluate the displacement dependency of metallic damper which has straight type steel strut, cyclic tests are conducted with the target displacement variables on constant velocity. Form this, width to height ratio of strut is 0.079. From the strength and energy dissipation capacity comparison, cyclic test results are short of the static test results. Therefore more detailed design which are considering target structure period and dynamic characteristics is needed.

In order to reduce the carbon dioxide exhaust quantity and the energy amount and the waste which becomes the global warming primary reason recently, the most efficient method was focused on the long-life building in Structural field. So in order to improve seismic capacity, new shape steel damper may be used in bolted connection, which made reuse of member impossible owing to serious brittle fracture of main member such as beam and column. To solve above problem, new type connection was developed and tested. As result of test, new type connection was shown good seismic capacity and main member such as beam and column were stable behavior.

To evaluate the strength and energy dissipation capacity of straight type metallic damper, cyclic tests are conducted with the target displacement variables on constant velocity. From the strength and energy dissipation capacity comparison, cyclic test results are short of the static test result. Therefore more detailed cyclic tests and researches are needed.