Utilizing Visco-Elastic Dampers in the Seismic Retrofit of a Thirteen Story Steel Framed Building

by Patrick Crosby, The Crosby Group, Redwood City, United States,
James Kelly, The Crosby Group, Redwood City, United States,
J. P. Singh, The Crosby Group, Redwood City, United States,

Document Type: Proceeding Paper

Part of: Structures Congress XII


A 13 story steel framed building in Santa Clara Country, California exhibited strong beating effects (torsional coupling) and prolonged building response as result of various seismic events. A study was conducted to determine the reason why this structure performed differently from similar structure in the adjacent area. A lack of inherent damping was found to be the primary cause for poor dynamic behavior. Three 'seismic' dampers were studied for implementation into the structure to reduce the buildings response. The design approach and parameters are presented in this paper. The effectiveness of the chosen damper to various dynamic excitations is compared to the approximately 1% damped existing structure. The results show that the building response can be significantly reduced by the implementation of dampers.

Subject Headings: Damping | Earthquake resistant structures | Building design | Steel structures | Seismic tests | Steel frames | Seismic design | California | United States

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