The Pacifi c Earthquake Engineering Research Center (PEER) is coordinating a major multidisciplinary programme,
the Tall Buildings Initiative (TBI), to address critical technical issues related to the design and analysis
of new tall buildings located in coastal California. The authors of this paper, listed alphabetically, are involved
in various research studies related to ground motion modelling, selection, modifi cation and simulation for analysis
of tall buildings. This paper summarizes the scope and progress of ongoing activities related to ground motion
issues for response history analysis of tall buildings