Author(s)

V. Shustov

Abstract

Seismic isolation: antifriction approach V. Shustov Seismic Risk Evaluation, 536 3/4 N. Genesee Ave., Los Angeles, CA 90036, USA ABSTRACT The objective of the work is a further development of engineer- ing concept of seismic isolation. Neglecting a transient stage of seismic loading results is a widespread misjudgement: a force of resistance associated with velocity is mostly conceived as a source of damping vibration, nobody pays attention that this can be an active force at the same time, during an earthquake type excitation. In consequence of this the existing concept of dam- ping-dependent isolation systems is inadequate, sometimes even jeopardizing the safety of structures thus discrediting the very idea of seismic isolation. There is a way out: it is necessary to break with the damping dependency. DAMPING: DUAL IDENTITY Concept of seismic isolation is based on the premise that the fundamental period of the superstructure as a rigid body rocking on isolators (

Keywords