Soft story behavior

Six Story Building with Soft Story Behavior... 

The building is modeled as a 6 DOF shear type model with soft story behavior. This type of behavior is observed in most real buildings that usually have openings and shops at the first story. The mass is assumed uniform at all story levels and equal to m =3.2x1 (Fkg. The lateral stiffiiess is... 

The average dissipated energy by dampers (Jl) 1. A 6 story building with soft story behavior... 

The two load distributions are schematically shown in Figure 1. The applied lateral load distributions are increased and the response is plotted in terms of base shear V/, vs. top floor displacement D (for example center of mass of the top floor). This is the so-called pushover curve or capacity curve (also shown schematically in Figure 1). The above load patterns are supposed to reproduce static loads equivalent to the seismic action. The two load patterns correspond to a first-mode dominated behavior and to a bottom soft-story response. Other distributions can be used but are typically non considered. 

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