study of effect of vertical components of earthquake on thin steel plate shear walls

damages due to northridge and kobe earthquakes were expressive of considerable effects of vertical components of earthquakes compared to the horizontal ones. on the other hand, thin steel plate shear wall is one of the newest resistant systems which until now it`s behavior haven’t been investigated under vertical component of earthquake. therefore, in this article, effects of vertical component on seismic responds such as displacement and stories shear and forces of columns and beams with usage of non-linear time history dynamic analysis under several ground motions of vertical and horizontal components of earthquakes in 3, 10 and 20 frames is studied. results of analysis show that vertical component of earthquake has considerable effect on seismic responds of steel shear walls.