ABSTRACT
Columnbasesarethemostimportantconnectionsinsteelstructuresbecausetheir mechanicalbehaviorcontrolsdecisivelythestrengthsandrigiditiesofframes. Especiallyinseismiczones,thequestionofhowtoensurethenecessaryrotational rigiditiesandultimatestrengthsofcolumnfootingsisaveryimportantproblemfor structuraldesigners.
