A wasp-waisted and irregular overrun building is in consideration. When a pure frame structure is selected, the torsional period ratio and the inter-story drift do not satisfy the requirements in the standards. In view of the external elevation appearance, the arrangement of shear walls on the front plane is not allowed. And there is no suitable position for laying all steel bracing. After a comparison of various schemes, the seismic control plan is designed by using fluid viscous dampers and buckling-restrained braces. In this paper, a three-dimensional finite element model of the structure is established by the ETABS for the calculations of the uncontrolled structure, the structure installed with fluid viscous damper and the structure installed with fluid viscous damper and buckling-restrained brace by the modal shape decomposition response spectrum method. Then, the comparison and analysis of the dynamic characteristics and the seismic response of the three structures are made. Finally, the time-history analysis is carried out. The results show that the fluid viscous damper and the buckling-restrained brace can all reduce the seismic responses effectively. Besides that, the buckling-restrained braces can control the torsion effectively.

fluid viscous damper  /  buckling-restrained brace  /  inter-story drift  /  floor shear  /  mode-shape decomposition response spectrum method