The Penn State Research Foundation - University Park PA,
Shannon K. Sweeney - Erie PA,
Ernest B. Ferro - Corry PA,
Richard Sause, JR. - Hellertown PA,
James M. Ricles - Bethlehem PA,
Jeffrey A. Ferro - Corry PA,
THE PENN STATE RESEARCH FOUNDATION - University Park PA
A passive damper for earthquake hazard reduction includes an inner member received in an outer member, with an elastomeric material disposed in the gaps between the inner and outer member. The elastomeric material has at least a first and a second portion. The first portion is bonded or connected to both the inner member and outer member such that no slippage occurs between the members and the material. The second portion is not bonded or connected to at least one of the inner and outer members such that slippage may occur.