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From Large Scale Test Findings to Cost-Benefit Analysis of Base-Isolated Buildings

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Abstract

A NEES/EERI Research to Practice Webinar "From Large Scale Test Findings to Cost-Benefit Analysis of Base-Isolated Buildings" Presented by: Keri Ryan (M. EERI), University of Nevada, Reno; Anthony Giammona, Nabih Youssef & Associates; Gilberto Mosqueda (M. EERI), University of California, San Diego; Stephen A. Mahin (M. EERI), University of California, Berkeley. November 20, 2013 11:00 - 12:30 AM ET

Seismic isolation has long been regarded as an effective technique to enhance the seismic performance of structures, but applications to new buildings has been limited in the United States. The following reasons have often been given for the slow growth of application for seismic isolation systems: the high cost premium of isolation coupled with inability to convey the potential benefit to building owners; lack of field or laboratory data on full-scale, realistic buildings; and uncertainty about the response of isolated structures in extreme ground motions that exceed design levels. This NEES/EERI research-to-practice webinar will present findings from the recently completed NEES TIPS (Tools for Isolation and Protective Systems) project. The project was designed as a comprehensive research and education program to facilitate the wider adoption of seismic isolation systems for the superior protection of structures. This webinar will focus on three main topic areas. 1) Findings from a full-scale test program on isolated and conventional structures conducted at E-Defense. Among the highlights, new knowledge is presented about the influence of vertical excitation on the response of nonstructural components and contents in base-isolated and conventional buildings. Furthermore, the test results from the E-Defense tests are used to validate and make recommendations regarding modeling procedures applied by practitioners for the design of base-isolated buildings. 2) Findings from limit state tests on isolated buildings conducted at the University at Buffalo NEES facility. Based on calibrated results from the limit state tests, a FEMA P695 procedure is applied to assess the behavior and collapse capacity of isolated buildings considering pounding against a moat wall. 3) Results from comparative life cycle cost-benefit analysis of base-isolated buildings. These results are interpreted within a broader a FEMA P58 framework for practicing engineers to develop results to present to owners who are choosing between minimum code compliance and various enhanced performance designs.

Credits and References

Webinar co-produced by EERI and NEES

Cite this work

Researchers should cite this work as follows:

  • NEES EOT (2013), "From Large Scale Test Findings to Cost-Benefit Analysis of Base-Isolated Buildings," http://nees.org/resources/7282.

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