Use of walls in controlling detrimental effects of stiffness irregularity in RC buildings on hill slopes
  Aditya B. Deshmukh and Rupen Goswami
  This paper discusses behaviour of archetypical reinforced concrete (RC) buildings on sloping ground with two possible types of column base fixity conditions. Twisting behaviour due to stiffness irregularity is a major concern for such buildings. This study demonstrates the use of RC walls to minimise torsional effects using results of modal analysis of building models. Based on building typology and ground slope, three configurations of RC walls are examined, and among them, the best configuration is identified. Also, earthquake behaviour of existing buildings in hilly regions is studied and compared with that of buildings designed using revised code provisions. Results of nonlinear time history analyses of buildings demonstrates poor behaviour of existing buildings, and corroborates the efficacy of RC walls towards ensuring seismic safety of buildings on hill-slope.