Analytical Study on Optimum Placement and Sizing of X-Plate Metallic Dampers for Seismic Response Control of Multistoried RC Building Frame

Abstract

X-plate metallic damper (XPD) is one device that is capable of sustaining many cycles of stable yielding deformation resulting in a high level of energy dissipation or damping. For quantification of effectiveness of XPD, optimum placement and sizing of XPD are one of the practical interest. This paper investigates effect of placement and sizing of X-Plate damper on a G+3 square shaped building. The most optimal damper placement location pattern is selected from some fixed location patterns whereas the sizes of XPD are varied. The objective function, which is used to find optimal location pattern of damper is taken as a combination of the maximum base shear and maximum storey drift with dampers and their counterparts in structure without dampers. The analysis of controlled G+3 square shaped RC building is done under three earthquake ground motions. Nonlinear Time History analysis is performed using structural analysis package, SAP2000. Response parameters like storey displacement, storey drift, base shear, percentage energy dissipated (Ed) are calculated. The optimal placement of XPDs provides significant reduction in response compared with other location patterns of placement of XPD considered in the present study. In contrast storey displacement, storey drift, base shear, percentage energy dissipated (Ed) are crucial from a design point of view of the XPD.

Keywords: Non-Linear Time History Analysis, X-Plate Damper, Response control, Optimization, SAP2000