Using viscous damper distribution to reduce multiple seismic responses of asymmetric structures

The main contribution of this study is investigating the possibility of controlling both displacements and accelerations of asymmetric buildings simultaneously by using linear viscous dampers. The structures are single-storey systems with moment-resisting steel frames and one-way stiffness, strength and damping eccentricities. Linear non-classical modal and nonlinear time history analyses with different ground motions are performed on the models considering different values of eccentricities. Suitable distributions found using the Weak Torsional Balance concept which uses mean square values of lateral displacement or acceleration are compared with distributions found when considering maximum values. The results show that the changes in structural modal properties and different responses by damper distribution are considerable in some cases. Also some distributions are suggested to control lateral displacement, diaphragm torsion and lateral acceleration of the diaphragm.