Swe Swe Khaing, Nay Myo Kyaw Thu
This paper presents comparative analysis of fifteen-storeyed steel frame building with and without damper. In this study, the proposed building is located in seismic zone 3. It is a rectangular shape building and its occupancy is residential. All steel structural members are designed according to AISC 360-05 and reinforced concrete is designed according to ACI 318-08. Dampers are designed by FEMA-356. Load consideration is based on UBC-97 and ASCE 7-05. The structural frame type of proposed building is special steel moment resisting frame (SMRF). The analysis and design of structure is carried out by using STAAD-Pro software. Dynamic behavior of the structure for wind and earthquake loading with respect to response spectrum analysis is carried out. Dampers help in reducing the vibrations caused by wind and earthquake. By using dampers we can improve the resistance of building. In this study, fluid viscous dampers are studied in details. Base on damper force, the numbers of required dampers are 64. Fluid viscous dampers are provided at the X and Z-direction bracing in model M-I. The other models M-II is provided at the Z-direction and M-III is provided at the Z-direction. The results of the maximum storey displacement of the structures due to the added dampers can be reduced. But the results of base shear are increased. Changes in response of storey drift, displacement and base shear for the damped structure are demonstrated illustrating the efficiency of dampers.
Steel Frame Building, Viscous Damper, Storey Drift, Displacement, Base Shear