Comparison of Dynamic Characteristics and Response Analysis of Building Structures Incorporating Viscous Fluid Dampers and Buckling Restrained Braces

摘要

The use of viscous fluid dampers (VFDs) and buckling restrained braces (BRBs) are common in seismic regions. These devices are very successful in robust energy dissipation and they use different mechanism in preventing damage to structural systems. These devices are not used together very often but a hybrid system may act more efficiently for a wider range of earthquake magnitudes. The building benefits more from VFDs at low magnitude earthquake, for a moderate event both VFDs and BRBs come into action, and for extreme events VFDs may help when BRBs tend to exhibit large maximum and residual drift. This paper presents a study using varying configuration of VFD and BRB in a reference test model. These devices are employed in alternate-diagonal configuration at each story and the number of these devices is varied. A series of nonlinear time history analysis is performed and various analysis responses are captured. The results from the study are used to understand dynamic characteristics and response analysis of such a hybrid system and how it may be employed to get the optimum response.