Moved:SCEC UGMS Committee Meeting 5
{{#externalredirect: https://www.scec.org/workshops/2015/ugms-nov}}
- SCEC Committee for Utilization of Ground Motion Simulations Meeting 5
- Organizers: C.B. Crouse (AECOM) and Tom Jordan (SCEC/USC)
- Date: Monday, November 30, 2015 (10:00-15:00)
- Location: SCEC Board Room (ZHS 167), USC, Los Angeles, CA
- Participants: 20 (by invitation only)
Contents
Agenda
Presentation slides may be downloaded by clicking each title. PLEASE NOTE: Slides are the author's property. They may contain unpublished or preliminary information and should only be used while viewing the talk.
| 10:00 | Welcome and introductions | |
| 10:15 | Meeting Agenda Overview and Review of Results from May 2015 Meeting | C.B. Crouse |
| 10:45 | Update on SCEC CyberShake Progress - Hybrid Approach to Broadband Ground Motion Simulations (Graves and Pitarka, 2010, 2015) - Broadband CyberShake Calculations - Discussion |
Rob Graves Scott Callaghan |
| 11:15 | Calculation of Risk-Targeted Maximum Considered Earthquake Response Spectra (MCER) - Weighted Average of CyberShake and NGA-based MCER - Discussion |
Kevin Milner |
| 11:45 | Proposed approach to validating 3-D simulations before using them in engineering applications | Norm Abrahamson |
| 12:00 | Lunch | |
| 13:00 | Updated Site Response Analysis - Discussion |
Domniki Asimaki |
| 13:30 | Technical Items for Resolution Before Finalizing Approach for MCER Calculations - SCEC web MCER look-up tool for city of L.A. & other users - Discussion |
C.B. Crouse/Tom Jordan |
| 14:00 | Logistics and Schedule for Finalizing 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) | C.B. Crouse |
| 14:30 | Future Work for CyberShake | Tom Jordan |
| 14:50 | Results to be Presented and Tentative Dates for Next UGMS Meeting | |
| 15:00 | Adjourn |
Participants
| Member Attendees (in person) C.B. Crouse - chair Bob Bachman Rob Graves John Hooper Marty Hudson Nico Luco Paul Somerville Tom Jordan |
Member Attendees (remotely) Norm Abrahamson John Anderson Jack Baker Art Frankel |
Members Absent Jacobo Bielak Ron Hamburger Curt Haselton Charlie Kircher Lew Marshall Farzad Naeim |
Observers Brad Aagaard Domniki Asimaki Annemarie Baltay Scott Callaghan David Gill Christine Goulet Tran Huynh Ting Lin Kevin Milner Morgan Moschetti Ramin Motamed Kim Olsen Sanaz Rezaeian Andreas Skarlatoudis Ricardo Taborda |
MCER Results
A zip file with MCER results is available here.
MCER Maps
Maximum Considered Earthquake Response (MCEr) maps for the Utilization of Ground Motion Simulations Committee, interpolated between 336 Study 15.4 CyberShake sites.
| Period | Probabilistic MCER | Deterministic MCER | Deterministic Lower Limit | Combined MCER results |
|---|---|---|---|---|
| 2 Second, RotD100 | ||||
| 3 Second, RotD100 | ||||
| 5 Second, RotD100 | ||||
| 10 Second, RotD100 |
GMPE Comparisons
| Period | CyberShake Combined MCER | GMPE Combined MCER | Ratio (CyberShake/GMPE) | Weight Average |
|---|---|---|---|---|
| 2 Second, RotD100 | ||||
| 3 Second, RotD100 | ||||
| 5 Second, RotD100 | ||||
| 10 Second, RotD100 |
Individual Site MCER Results
| Site | Full name | Probabilistic MCER | Deterministic MCER | Combined MCER results | Overall MCER results |
|---|---|---|---|---|---|
| CCP | Century City Plaza | ||||
| COO | Compton | ||||
| LADT | Los Angeles Downtown | ||||
| LAPD | Lake Palmdale | ||||
| P22 | P22 | ||||
| PAS | Pasadena | ||||
| s429 | s429 | ||||
| s603 | s603 | ||||
| s684 | s684 | ||||
| s758 | s758 | ||||
| SBSM | San Bernardino Strong Motion | ||||
| SMCA | Santa Monica Civic Auditorium | ||||
| STNI | 710/90 Interchange | ||||
| WNGC | Whitter Narrows Golf Course |
CyberShake/GMPE Combined Weights
The average spectrum (green lines in the above plots) represent a weighted average of CyberShake and the GMPEs. The weights are period dependent as shown below. Probabilistic results are averaged at the hazard curve level prior to calculation of the Risk Targeted Ground Motion value and deterministic results are averaged after deterministic calculation.
