CEE 200 Seminar: Lessons learned from 3-dimensional shake table testing of a full-scale seismically-isolated building

Speaker: Prof. Keri L. Ryan
Affiliation: University of Nevada Reno

UCLA Civil & Environmental Engineering Department
C&EE 200 Section 1 Seminar
Structural, Geotechnical and Civil Engineering Materials
Lessons learned from 3-dimensional shake table testing of a full-scale
seismically-isolated building
Keri L. Ryan
Associate Professor, University of Nevada Reno
klryan@unr.edu
This presentation synthesizes the lessons learned from a full-scale shaking table test of a 5-story
base-isolated building carried out at Japan’s Hyogo Earthquake Engineering Research Center (EDefense).
The building was tested with two different isolation systems (triple pendulum bearings and
a hybrid system of lead-rubber bearings and low-friction rolling cross-linear bearings) and in the
fixed-base configuration. The tested building had a realistic floor system, nonstructural components
(suspended ceilings, sprinkler piping and interior walls), and furnishings, and was subjected to strong
earthquake shaking. The tests served as a full-scale proof of the concept of seismic isolation to
protect the building from structural damage in very strong earthquake shaking; for instance, displacement
demands across the isolation system were more than twice what has been observed in
any previous earthquake event. However, the nonstructural components and furnishings were not
completely protected from damage, and the tests showed that these items were sensitive to the
vertical component of ground shaking, which is unaffected by the seismic isolation system. While
the overall performance of the isolation systems was very impressive when considered against other
available options for seismic protection, the tests highlight the challenge of designing a building to
remain immediately operational following a large earthquake. This presentation will summarize the
test program, present the major findings, and discuss future directions in research and design practice.
Where: Engineering VI 134A
When: 12:00 – 12:50 PM, Tuesday, February 18, 2020
Keri Ryan is an Associate Professor of Civil Engineering and a member
of the Center for Civil Engineering Earthquake Research at the University
of Nevada, Reno. She specializes in earthquake engineering and protective
systems for high seismic performance, with application to buildings
and bridges. She was the PI of the U.S. National Science Foundation
funded “Tools for Isolation and Protective Systems” (or TIPS) project to
address impediments to the wider application of seismic isolation systems,
and she led an international collaborative test program between
the U.S. and Japan that conducted earthquake testing of a full scale
building comparing conventional and alternative construction approaches.
Ongoing research examines ways to ensure that high seismic
performance objectives can be met. She has authored more than 50 publications
on topics related to seismic isolation, high seismic performance, and life cycle analysis of
structures.

Date/Time:
Date(s) - Feb 18, 2020
12:00 pm - 12:50 pm

Location:
Cohen Room 134, Engineering VI Building
404 Westwood Blvd Los Angeles California 90095
Map Unavailable