Report on US ActivitiesReport on US Activities
ICOLD 84th Annual MeetingCommittee on Seismic Aspects of Dam Design
Lelio Mejia, PhD, PE, GEChair, USSD Earthquakes Committee
May 17, 2016
OutlineOutline
• USSD Earthquakes Committee– Membership– Current initiatives
• Key US Seismic Projects• Other Activities
USSD Earthquakes CommitteeMembership
USSD Earthquakes CommitteeMembership
ENG SEW AW (2016) PETER J. HRADILEK (2015)
DONALD H. BABBITT (vice) (2015) DINA HUNT (2015)
JOHN BARNEICH (2015) C. MICHAEL KNARR (2015)
MICHAEL H. BEATY (2015) RICHARD W. KRAMER (2015)
MOHSEN BEIKAE (2015) C. ERIC LINDVALL (2015)
ROSS BOULANGER (2015) FAIZ I. MAKDISI (2015)
BRUCE BRAND (2015) LELIO MEJIA (chair) (2015)
THOMAS BROWN (2015) JACK MONTGOMERY (vice) (2015)
WILLIAM BROWN (2015) LARRY NUSS (2015)
CLINTON CARLSON (2015) WARREN J. PAUL (2015)
KERRY CATO (2015) PHOEBE PERCELL (2015)
JOSEPH L. EHASZ (2015) MARC RYAN (2015)
NICOLAS VON GERSDORFF (2015) MARK SCHULTZ (2015)
YUSOF GHANAAT (2015) JOHN C. STOESSEL (2015)
GEORGE F. HOROWITZ (2015) JENNIFER HUGGINS (2015)
• 30 members• Owners, regulators, consultants
Current InitiativesCurrent Initiatives
• Publications– Guidelines for seismic deformation analysis of
embankment dams– Update of guidelines for seismic hazard analysis
and selection of ground motion parameters for dams
– Update of guidelines for seismic design and evaluation of structures appurtenant to dams
• Workshop on seismic analysis of concrete dams: “Blind Prediction of Seismic Response of Monticello Dam”
Monticello DamMonticello Dam
• SS• Napa County, CA• Medium Thick Arch
Structure• Height: 93 m• Crest length: 312 m • Crest width: 3.7 m• Source: www.usbr.gov/projects/
Recorded Dam Seismic ResponseRecorded Dam Seismic Response
• M 4.1 at 16 km on 22 May 2015• Ground motions recorded at foundation bedrock and crest• Six international participant teams were given: Dam
characteristics, material data, and bedrock motions• Teams were asked to develop models and predict crest motions
Monticello Concrete Young’s ModulusMonticello Concrete Young’s Modulus
Predictions of Acceleration Response Spectraat Crest Center
Predictions of Acceleration Response Spectraat Crest Center
Predictions of Acceleration Response Spectra at Crest Quarter Point
Predictions of Acceleration Response Spectra at Crest Quarter Point
9
Expect full report in 2016
Key US Dam Seismic Projects (1)Key US Dam Seismic Projects (1)
• Echo Dam Retrofit, USBR, Utah• Upstream and downstream buttresses
with shear keys to rock• Spillway structure retrofit
Key US Dam Seismic Projects (2)Key US Dam Seismic Projects (2)
• Perris Dam Retrofit, DWR, California• DSM foundation treatment and downstream
buttress
Key US Dam Seismic Projects (3)Key US Dam Seismic Projects (3)
• Calaveras Dam Replacement, SFPUC, California• New replacement embankment dam, downstream
of existing dam• New spillway and outlet works
Key US Dam Seismic Projects (4)Key US Dam Seismic Projects (4)
• Lake Isabella Dam Retrofit, USACE, California• Downstream buttress on alluvium foundation
treated with shear walls• Special zoning for foundation fault rupture• New spillway and dam crest raise
Key US Dam Seismic Projects (5)Key US Dam Seismic Projects (5)
• Anderson Dam Retrofit, SCVWD, California• Upstream and downstream buttresses on rock• D/S buttress zoned for foundation fault rupture• New outlet works design for fault rupture• Spillway enlargement and crest raise
Other ActivitiesOther Activities• 6th International Symposium on Hydraulic Structures,
June 2016, Portland, OR• International Symposium on the Mechanics of
Internal Erosion for Dams & Levees, Aug 2016, Salt Lake City, UT
• Protections 2016, International Symposium, Colorado State University, Sept 2016
• USBR Workshop on “Assessing the State of Practice in Seismic Analysis of Dams”, August 2, 1016
• National Resources Council Project on ” State of the Art and Practice in Earthquake Induced Soil Liquefaction Assessment”, Report in 2016 at: https://www8.nationalacademies.org
• TVA Engineering Guidance Document for “Seismic Assessment of Embankment Dams”, Report in 2016
Thank YouThank You