Keri Ryan

Keri Ryan

Associate Professor
Keri Ryan

"What keeps me going is the hope that in my lifetime high performance/low damage structural engineering techniques will become commonplace. There is nothing better than working with a graduate student on the brink of discovery. In my spare time, I try to get to the top of more mountains."

Biography

Dr. Ryan is an associate professor the CEE Department, specializing in the earthquake and structural engineering sub-discipline. The overarching theme of her research is development of engineering concepts and techniques for improved seismic performance, with primary applications in buildings. Much of her work has focused on seismic isolation, and she has been awarded three major National Science Foundation projects focused in this area. She led an international collaborative test program between the U.S. and Japan that conducted shake table testing of a full scale building with and without seismic isolation. This led to groundbreaking discoveries on the effect of vertical shaking, and horizontal-vertical coupling responses in buildings. Recently, Dr. Ryan has diversified her research portfolio, and has recent or ongoing projects in the areas of nonstructural components, and lower damage structural systems for timber and concrete.

Download Dr. Ryan's CV

Education
  • Ph.D., Structural Engineering, University of California, Berkeley, 2004
  • M.S., Structural Engineering, University of California, Berkeley, 1999
  • B.S., Engineering and Applied Science, California Institute of Technology, 1998
Professional service
  • Editorial Board Member for Earthquake Engineering and Structural Dynamics, Appointment commencing July 2018.
  • Associate Editor, Journal of Structural Engineering (ASCE), 2012-2018.
  • Chaired the Overall Organizing Committee and Fundraising Committee for Retirement Symposium and Celebration of the Career of Anil K. Chopra, Oct. 2-3, 2017.
  • Peer Reviewer for ATC-120: Seismic Analysis and Design of Nonstructural Components and Systems, Phase I, 2015-2016.
  • Member of ASCE 7 Seismic Subcommittee and ASCE 41 Committee since 2013, with active contribution to the Seismic Isolation and Energy Dissipation provisions.

Professional Workshop Organization

  • Vertically Distributed Nonstructural Components (vNCS) Workshop (Co-Organizer), University of California, San Diego, July 18, 2018. Developed collaborative research plan with industry.
  • NEES TIPS Wrap-Up Workshop (Lead Coordinator), San Diego, Sept. 18, 2013. Communicated outcomes of NEES TIPS project.
  • NEES TIPS/E-Defense Full Scale Seismic Isolation Test Program, Participant Workshop (Lead Coordinator), Miki, Japan, August 17-19, 2011. Engaged participants in test program.
  • TIPS: Addressing Challenges to the Adoption of Seismic Isolation Workshop #1 (Lead Coordinator), San Francisco, Nov. 30, 2007. Identified obstacles to implementation of seismic isolation and developed a research agenda

News & announcements

Research interests

  • Seismic isolation of buildings and bridges
  • Influence of vertical ground shaking on the seismic response of structural and nonstructural components
  • Fundamental dynamic response of structures to 3-dimensional ground shaking
  • Low damage or damage tolerant lateral systems using innovative materials
  • Low damage detailing of nonstructural components
  • Dynamic response of buildings with post-tensioned rocking wall systems
  • Influence of soil-structure interaction on vertical ground shaking

Selected publications

  1. Eltahawy, Walaa, Ryan, Keri L., Cesmeci, Sevki, Gordaninejad, Faramarz, “Displacement/velocity-based control of a liquid spring – MR damper for vertical isolation”, Structural Control and Health Monitoring, 2019.
  2. Eltahawy, Walaa, Ryan, Keri L., Cesmeci, Sevki, Gordaninejad, Faramarz, “Parameters affecting dynamics of three-dimensional seismic isolation”, Journal of Earthquake Engineering, 2018.
  3. Ryan, Keri L., Button, Martin R., Mayes, Ronald L. “ASCE 7-16 lateral force distribution equations for static design of seismically isolated buildings”, Journal of Structural Engineering, 145(2):04018258, 2018.
  4. Ryan, Keri L., Okazaki, Taichiro, Coria, Camila B., Sato, Eiji, Sasaki, Tomohiro, “Response of hybrid isolation system during a shake table experiment of a full scale isolated building”, Earthquake Engineering and Structural Dynamics, 47(11):2214-2232. 2018.
  5. Guzman Pujols, Jean C., Ryan, Keri L. “Computational simulation of slab vibration and horizontal-vertical coupling in a full-scale testbed subjected to 3D shaking at E-Defense”, Earthquake Engineering and Structural Dynamics, 47(2):438-459, 2017.
  6. Zargar, Hamed, Ryan, Keri L., Rawlinson, Taylor, Marshall, Justin D. “Evaluation of a passive gap damper to control displacements in a shaking test of a seismically-isolated 3-story frame”, Earthquake Engineering and Structural Dynamics, 46(1):51-71, 2016.
  7. Mohebbi, Alireza, Ryan, Keri. L., Sanders, David H. “Seismic protection of the piers of integral bridges using sliding bearings”, Journal of Earthquake Engineering, 21(8):1365-1384, 2016.
  8. Cutfield, Matt R., Ryan, Keri L., Ma, Quincy. “Comparative life cycle analysis of conventional and base-isolated buildings”, Earthquake Spectra, EERI, 32(1):323-343. 2016.
  9. Guzman Pujols, Jean C., Ryan, Keri L. “Development of generalized fragility functions for seismic induced content disruption”, Earthquake Spectra, EERI, 32(3):1303-1324. 2015.
  10. Ryan, Keri L., Soroushian, Siavash, Maragakis, E. Manos, Sato, Eiji, Sasaki, Tomohiro, Okazaki, Taichiro. “Seismic simulation of an integrated ceiling-partition wall-piping system at E-Defense I: Three-dimensional structural response and base isolation”, Journal of Structural Engineering, ASCE, 142(2):04015130, 2015.
  11. Soroushian, Siavash, Maragakis, E. Manos, Ryan, Keri L., Sato, Eiji, Sasaki, Tomohiro, Okazaki, Taichiro, Mosqueda, Gilberto. “Seismic simulation of an integrated ceiling-partition wall-piping system at E-Defense. II: Evaluation of nonstructural damage and fragilities”, Journal of Structural Engineering, ASCE, 142(2):04015131, 2015.
  12. Ryan, Keri L., Dao, Nhan D. “Influence of vertical ground shaking on horizontal response of seismically-isolated buildings with friction bearings”, Journal of Structural Engineering, ASCE, 142(1): 04015089, 2015.
  13. Dao, Nhan D. and Ryan, Keri L. “Computational simulation of a full-scale fixed-base and isolated-base steel moment frame building tested at E-Defense”, J. Struct. Eng., 140, Special Issue: Computational Simulation in Structural Engineering, A4014005, 2014.
  14. Dao, Nhan D., Ryan, Keri L., Sato, Eiji and Sasaki, Tomohiro. “Predicting the displacement of triple pendulumTM bearings in a full-scale shaking experiment using a three-dimensional element”, Earthquake Engineering and Structural Dynamics, 42(11):1677-1695, 2013.
  15. Warn, Gordon P. and Ryan, Keri L. “A review of seismic isolation for buildings: historical development and research needs”, Buildings (Open Access), Invited manuscript for journal special issue, 2(3):300-325, 2012.

Courses taught

  • CEE 120: Sustainable Infrastructure Systems
  • CEE 372: Mechanics of Solids
  • CEE 381: Structural Analysis
  • CEE 482/682: Design of Timber Structures
  • CEE 486/686: Computational Structural Analysis
  • CEE 704: Finite Element Analysis
  • CEE 721: Nonlinear Structural Analysis