Vibration Reduction of Constrained Viscoelastic Layer Dampers Installed in Floor System of Steel Buildings using Various Dynamic Loadings

철골조 바닥구조에 설치된 샌드위치형 점탄성 감쇠장치의 가진원별 진동저감 효과

Floor structure system with long span and lightweight material increases vibration response by people's jumping and heel drop, etc. To achieve comfortable serviceability of residents in a building, excessive vibration response is needed to be reduced by taking effective method, rather than increasing stiffness, which causes enlarging the size of structural members. Increasing stiffness method takes a lot of costs, so we need to find another method. The most effective method is increasing structural damping to reduce costs without increasing the size and stiffness of members. In this study, constrained viscoelastic layer damper was suggested to improve damping performance for reducing vibration response of slab in steel structure. After constrained viscoelastic layer damper was installed in the experimental structure, the vibration experiments were conducted using various loads; jumping, heel drop, impact hammer and force exciter. It was verified experimentally that the constrained layer damper was effective method for vibration response reduction to any dynamic load in building.