Stability of Elastomeric and Lead-Rubber Seismic Isolation Bearings Under Extreme Earthquake Loading (NEES-2011-1096)

<p><strong>Title</strong>: Stability of Elastomeric and Lead-Rubber Seismic Isolation Bearings Under Extreme Earthquake Loading (NEES-2011-1096)</p> <p><b>Year Of Curation: </b>2014</p> <p><b>Description: </b>The research objective of this project is to develop improved methods for modeling and predicting the stability limit of elastomeric and lead rubber seismic isolation bearings. Elastomeric and lead-rubber isolation bearings are used for seismic isolation of building and bridge structures to reduce the damaging effects of strong ground shaking. The Elastomeric bearings consist of alternating layers of rubber bonded to intermediate steel shim plates and the lead-rubber bearings have an additional lead plug inserted into a central hole. During severe earthquake ground shaking, these isolation bearings are likely to be subjected to simultaneous large lateral displacements and axial compressive loads that could cause bearing instability. This research will identify the fundamental mechanism(s) causing bearing instability through detailed nonlinear finite element analysis and component level testing. These studies will aid in the development of an improved macro-model capable of capturing bearing instability and the derivation of a mechanics-based closed-form expression for predicting the bearing stability limit state.</p> <p><b>Award: </b>http://www.nsf.gov/awardsearch/showAward?AWD_ID=1031362</p> <p><b>PIs & CoPIs: </b>Gordon Warn</p> <p><b>Dates: </b>January 09, 2010 - October 02, 2012</p> <p><b>Organizations: </b>Pennsylvania State University, PA, United States</p> <p><b>Facilities: </b>State University of New York at Buffalo, NY, United States</p> <p><b>Sponsor: </b>NSF - CMMI - 1031362</p> <p><b>Keywords: </b>Seismic Isolation,Elastomeric Bearings,Stability,Dynamic Response</p> <p><b>Publications: --</b></p> <nb:citations></nb:citations>