Analysis, Design & Performance

Single Abstract

339585 - Mapping engineering demand parameters in high-friction sliding isolated houses to determine target implementation locations in California

Friday, April 20
3:30 PM - 5:00 PM
Location: 204AB

Light frame houses are susceptible to costly damage to structural and nonstructural components, as well as contents damage, during even moderate intensity earthquakes. The authors have recently validated high-friction sliding seismic isolation as a low-cost method to nearly eliminate damage during intense MCE shaking through full-scale shake table tests of a two-story house. This paper compares deformations and accelerations in houses that are isolated with high-friction sliding systems and conventional low-friction sliding systems to fixed-base houses at numerous intensities around California. Statewide and major metropolitan area maps of deformation and acceleration ratios of isolated versus fixed-based houses highlight the near-fault locales where there is a substantial decrease in damage when one implements an isolation system. Results show that isolated houses have significantly reduced engineering demand parameters compared to fixed-base structures, however, conventional low-friction sliding systems do not substantially improve performance compared to high-friction sliding systems in regions where it is most beneficial to isolate a house. The high-friction systems substantially reduce isolation deformation demands compared to the low-friction systems. Results from this study provide practitioners with an easy way to determine if there is a substantial benefit to isolating a particular house or sub-development of houses, to quantify the decrease in structure deformations and accelerations, and to select a preliminary sliding isolation concept and properties based on the location and desired performance of the structure.

Ezra Jampole

Associate
Exponent

Dr. Jampole is an associate at Exponent. He specializes in seismic isolation, earthquake engineering, performance-based design, nonlinear structural analysis, and structural dynamics. He has experience designing steel, concrete, and wood framed buildings. His background in evaluating building damage includes laboratory testing and field investigations following adjacent construction, settlement, hurricanes, and earthquakes.

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339585 - Mapping engineering demand parameters in high-friction sliding isolated houses to determine target implementation locations in California



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