MAXIMUM RESPONSE OF ASYMMETRIC STRUCTURES SUBJECT TO A MULTICOMPONENTEARTHQUAKE

A simple and general technique to obtain a six-component earthquake in put motion of a rigid foundation using three-linear-components earthqu ake record is presented. Using the multicomponent input, the maximum s tructural response to an arbitrarily oriented earthquake is derived. T he method is applied to determine the response spectrum for a two-d.o. f. laterally and torsionally coupled linear system. The effects of fou ndation geometry, structural properties and apparent wave velocity on the structural response are investigated. It is found that increasing the foundation size reduces the peak values of the input motion; this reduction is more pronounced for a square foundation than for a circul ar one.