modification factors for residual drift assessment ‎of adjacent smrfs considering structural pounding

Maximum residual interstory drift ratio (mridr) is permanent lateral deformations at the end of the severeearthquake, even though the structure did not experience severe damage or total collapse. it was noted that reinforced concrete (rc) structures having members with stiffness-and-strength degrading features experience smaller residual drift (rd) than those steel structure having members with non-degrading features. due to record-to-record variability of rd, the estimation of this parameter is important during the performance-based assessment of existing structure. therefore, some researchers proposed approximate methods to estimate rd (ruiz-garcía and chora, 2015). yahyazadeh and yakhchalian (2018) evaluated the effects of using fluid viscous dampers on the mridr response of steel structures and concluded that linear dampers have better performance than nonlinear one. approximate estimation of rd isimportant especially for adjacent structures because pounding phenomenon can significantly influence the amount of rd. recently, kazemi et al. (2019) investigated the effects of pounding phenomenon on the seismic collapse capacity of the 2, 4-, 6- and 8-story adjacent structures, and proposed modification factors to estimate seismic collapse capacity of a structure considering pounding.