Exciting news! We're transitioning to the Statewide California Earthquake Center. Our new website is under construction, but we'll continue using this website for SCEC business in the meantime. We're also archiving the Southern Center site to preserve its rich history. A new and improved platform is coming soon!
Home  /  SCEC Workshops  /  SCEC UGMS Committee Meeting

SCEC UGMS Committee Meeting

Conveners: C.B. Crouse and Tom Jordan
Dates: May 4, 2015 (10:00 - 15:30)
Location: SCEC Boardroom, USC, Los Angeles

SUMMARY: The SCEC Committee for Utilization of Ground Motion Simulations (or "UGMS Committee") is tasked to develop long-period response spectral acceleration maps for Los Angeles region for inclusion in NEHRP and ASCE 7 Seismic Provisions and in Los Angeles City Building Code. The maps would be based on 3-D numerical ground-motion simulations, and ground motions computed using latest empirical ground-motion prediction equations from the PEER NGA project. This project is coordinated with (1) the SCEC Ground Motion Simulation Validation Technical Activity Group (GMSV-TAG), (2) other SCEC projects, such as CyberShake and UCERF, and (3) the USGS national seismic hazard mapping project.

Presentation slides may be downloaded by clicking the links following the title. PLEASE NOTE: Files are the author’s property. They may contain unpublished or preliminary information and should only be used while viewing the talk.

Monday, May 4, 2015

10:00 - 10:15 Welcome, Attendee Introductions, and Agenda Review  
10:15 - 10:30 Introductory Remarks and Meeting Agenda (see Handout (PDF, 319KB)) C.B. Crouse
10:30 - 10:45 New Code Cycle (Project 17, BSSC Issue Teams, ASCE 7 SSC (PDF, 21KB) C.B. Crouse
10:45 - 11:00 Overview of SCEC CyberShake Platform (PDF, 5.1MB) Tom Jordan
11:00 - 11:30 Update on SCEC CyberShake Progress (PDF, 4.5MB) Philip Maechling
11:30 - 12:00 Calculation of Risk-Targeted Maximum Considered Earthquake Response Spectra (MCER)
(PDF, 834KB)
Scott Callaghan
12:00 - 13:00 Lunch  
13:00 - 13:30 Southern California MCER Sa(T) maps – CyberShake vs. 2013 NGA West2
- CyberShake & NGA West2 Sa maps for T = 3, 5, & 10 sec
- Ratio Maps (CyberShake/NGA West2) for each T
- Discussion
Kevin Milner
13:30 - 14:00 Calculation of v15.4 Risk-Targeted Maximum Considered Earthquake Response Spectra (MCER) at 14 Southern California Sites (T = 2 – 10 sec) (PDF, 896KB) Scott Callaghan
14:00 - 14:30 Effect of Near-Surface Geology (PDF, 563KB)
- SCEC Thick Surface Layer with Constant Material Properties vs. Realistic Model with Depth-Dependent Material Properties
- Results of 1-D Site Response with Both Models
- Discussion
C.B. Crouse
14:30 - 14:45 Break  
14:45 - 15:00 Technical Issues, Logistics, & Schedule for Producing Long Period MCER Maps for L.A. Region in Short Term (e.g., Possible supplement to ASCE 7-16 for City of L.A.) and Long Term (2021 NEHRP & 2022 ASCE 7) (PDF, 157KB) C.B. Crouse
15:00 - 15:15 Future Work for CyberShake Tom Jordan
15:15 - 15:30 Results to be Presented and Tentative Dates for Next UGMS Meeting  
15:30 Adjourn  

PARTICIPANTS

UGMS Members Attending:
John Anderson (UNR)
*Jack Baker (Stanford)
*Jacobo Bielak (Carnegie Mellon University)
C.B. Crouse (AECOM)
*Art Frankel (USGS)
Rob Graves (USGS)
John Hooper (MKA)
Marty Hudson (SEAOSC AMEC)
Tom Jordan (USC)
Charles Kircher (Kircher & Associates)
Nico Luco (USGS)
Paul Somerville (AECOM)
UGMS Members Absent:
Norm Abrahamson (PG&E)
Bob Bachman (R.E. Bachman)
Ron Hamburger (Simpson Gumpertz & Heger)
Curt Haselton (California State University, Chico)
Lew Marshall (SEAOSC AMEC)
Farzad Naeim (Farzad Naeim, Inc.)
 
Observers:
Domniki Asimaki (Caltech)
Nenad Bijelic (Stanford)
Scott Callaghan (USC)
Tran Huynh (USC)
Ting Lin (Marquette)
Philip Maechling (USC)
 
Kevin Milner (USC)
Morgan Moschetti (USGS)
Kim Olsen (SDSU)
Sanaz Rezaeian (USGS)
Andreas Skarlatoudis (AECOM)
Ricardo Taborda (Memphis)

*Remote Participants

PSHA HAZARD CURVES & MCER CURVES
Map of MCER Study Sites. Purple sites are along a 10 km x 10 km mesh, orange sites are near SCSN broadband stations, and yellow sites are locations of interest.  
     
  PSHA Hazard Curves MCER Curves
Study Sites (KML file) CyberShake v14.2 CyberShake v15.4 CyberShake v14.2 CyberShake v15.4
CCP
Center City Plaza
2s, 3s, 4s, 5s, 7.5s, 10s 2s, 3s, 4s, 5s, 7.5s, 10s Probabilistic MCER
Deterministic MCER
Combined Results
Overall Results
Probabilistic MCER
Deterministic MCER
Combined Results
Overall Results
COO
Compton
2s, 3s, 4s, 5s, 7.5s, 10s 2s, 3s, 4s, 5s, 7.5s, 10s Probabilistic MCER
Deterministic MCER
Combined Results
Overall Results
Probabilistic MCER
Deterministic MCER
Combined Results
Overall Results
LADT
Los Angeles Downtown
2s, 3s, 4s, 5s, 7.5s, 10s 2s, 3s, 4s, 5s, 7.5s, 10s Probabilistic MCER
Deterministic MCER
Combined Results
Overall Results
Probabilistic MCER
Deterministic MCER
Combined Results
Overall Results
LAPD
Lake Palmdale
2s, 3s, 4s, 5s, 7.5s, 10s 2s, 3s, 4s, 5s, 7.5s, 10s Probabilistic MCER
Deterministic MCER
Combined Results
Overall Results
 
Probabilistic MCER
Deterministic MCER
Combined Results
Overall Results
 
p22 2s, 3s, 4s, 5s, 7.5s, 10s 2s, 3s, 4s, 5s, 7.5s, 10s Probabilistic MCER
Deterministic MCER
Combined Results
Overall Results
 
Probabilistic MCER
Deterministic MCER
Combined Results
Overall Results
 
PAS
Pasadena
2s, 3s, 4s, 5s, 7.5s, 10s 2s, 3s, 4s, 5s, 7.5s, 10s Probabilistic MCER
Deterministic MCER
Combined Results
Overall Results
 
Probabilistic MCER
Deterministic MCER
Combined Results
Overall Results
 
s429 2s, 3s, 4s, 5s, 7.5s, 10s 2s, 3s, 4s, 5s, 7.5s, 10s Probabilistic MCER
Deterministic MCER
Combined Results
Overall Results
 
Probabilistic MCER
Deterministic MCER
Combined Results
Overall Results
 
s603 2s, 3s, 4s, 5s, 7.5s, 10s 2s, 3s, 4s, 5s, 7.5s, 10s Probabilistic MCER
Deterministic MCER
Combined Results
Overall Results
 
Probabilistic MCER
Deterministic MCER
Combined Results
Overall Results
 
s684 2s, 3s, 4s, 5s, 7.5s, 10s 2s, 3s, 4s, 5s, 7.5s, 10s Probabilistic MCER
Deterministic MCER
Combined Results
Overall Results
 
Probabilistic MCER
Deterministic MCER
Combined Results
Overall Results
 
s758 2s, 3s, 4s, 5s, 7.5s, 10s 2s, 3s, 4s, 5s, 7.5s, 10s Probabilistic MCER
Deterministic MCER
Combined Results
Overall Results
 
Probabilistic MCER
Deterministic MCER
Combined Results
Overall Results
 
SBSM
San Bernardino Strong Motion
2s, 3s, 4s, 5s, 7.5s, 10s 2s, 3s, 4s, 5s, 7.5s, 10s Probabilistic MCER
Deterministic MCER
Combined Results
Overall Results
 
Probabilistic MCER
Deterministic MCER
Combined Results
Overall Results
 
SMCA
Santa Monica Civic Auditorium
2s, 3s, 4s, 5s, 7.5s, 10s 2s, 3s, 4s, 5s, 7.5s, 10s Probabilistic MCER
Deterministic MCER
Combined Results
Overall Results
 
Probabilistic MCER
Deterministic MCER
Combined Results
Overall Results
 
STNI
710/90 Interchange
2s, 3s, 4s, 5s, 7.5s, 10s 2s, 3s, 4s, 5s, 7.5s, 10s Probabilistic MCER
Deterministic MCER
Combined Results
Overall Results
 
Probabilistic MCER
Deterministic MCER
Combined Results
Overall Results
 
WNGC
Whittier Narrows Golf Course
2s, 3s, 4s, 5s, 7.5s, 10s 2s, 3s, 4s, 5s, 7.5s, 10s Probabilistic MCER
Deterministic MCER
Combined Results
Overall Results
 
Probabilistic MCER
Deterministic MCER
Combined Results
Overall Results

MCER MAPS (CYBERSHAKE V14.2)

Period Probabilistic MCER Deterministic MCER Deterministic Lower Limit Combined MCER results
3 Second
RotD100
5 Second
RotD100
10 Second
RotD100

GMPE COMPARISON MAPS (CYBERSHAKE V14.2)

Period CyberShake Combined MCER GMPE Combined
MCER
Ratio (CyberShake/GMPE)
3 Second
RotD100
5 Second
RotD100
10 Second
RotD100

CYBERSHAKE ACTION LIST

  1. Plan CyberShake UCERF3 with initial runs 2015
  2. Run forward simulation of selected CyberShake ruptures to evaluate assumption of linear ground motion response.
  3. Clarify Deterministic MCER calculations with USGS.
  4. With Rob, modify hypocenter location probabilities to taper few hypocenters near top of fault.
  5. Discuss with Jacobo the large displacement he’s seeing in MCER results.
  6. Define a procedure for “approving” CyberShake result, short of publishing. Maybe define a series of stages to put a computational result through as they get checked
  7. Send out notification when we “certify” CyberShake 15.4 results
  8. Send out notification when we complete and certify CS 15.4 all sites and maps.
  9. Consider adding Alhambra Site City Emergency Response Center 10 Story Steel moment frame building.