BEGIN:VCALENDAR VERSION:2.0 PRODID:-//jEvents 2.0 for Joomla//EN CALSCALE:GREGORIAN METHOD:PUBLISH BEGIN:VTIMEZONE TZID:America/Los_Angeles X-LIC-LOCATION:America/Los_Angeles BEGIN:DAYLIGHT TZOFFSETFROM:-0800 TZOFFSETTO:-0700 TZNAME:PDT DTSTART:19700308T020000 RRULE:FREQ=YEARLY;BYMONTH=3;BYDAY=2SU END:DAYLIGHT BEGIN:STANDARD TZOFFSETFROM:-0700 TZOFFSETTO:-0800 TZNAME:PST DTSTART:19701101T020000 RRULE:FREQ=YEARLY;BYMONTH=11;BYDAY=1SU END:STANDARD END:VTIMEZONE BEGIN:VEVENT UID:2adc4f1000bd0ee8f964d232ef03d0ef167 CATEGORIES:Courses & Seminars SUMMARY:WEBSERIES: Site Specific Seismic Ground Motion Hazard Analysis 6-week course DESCRIPTION:
Presented by Dr. Norm Abrahamson, UC Berkeley
Please join us as we launch our first on-line learning series! Dr. Norm Abrahamson will pr esent a 6-week short course for CalGeo on Site Specific Seismic Ground Moti on Hazard Analysis. Sessions will run each Friday starting May 22nd from 11 am - 12:30pm. The last session will be Friday June 26th, 2020.
All we bcasts will be recorded and available on CalGeo's new On-line Learning Libr ary for course attendees. If you are unable to make all the live sessions, you will have full access to the online course. The online recorded course will also be available for purchase and include all sample problems and han d-outs.
Backg round
i. PSHA vs DSHA
ii. What the PSHA software is doing<
br />iii. Understanding PSHA results
When is a site-specific is req uired with ASCE 7-16
How are site-specific code values determined
i. Source model – UCERF3
1. Issue for implementation in h
azard codes
2. Selecting the magnitude for deterministic scena
rio
3. Comparison of UCERF3 with fault-specific slip-rate and
mag pdf
ii. Ground-motion models
1. NGA-W2 models
2. Proper use of VS30
3. Basin effects (Z1, Z2.5)
How are site-specific c
ode values determined (cont)
i. Steps for design spectra
1. Develop UHS and Deterministic spectra
2. RotD50 to RotD1
00
3. Risk factors – apply to UHS
4. Check lower
limits
5. take smaller of the two spectra
6. mul
tiply MCE spectrum by 2/3 for DE spectrum
CMS
i. Theory
ii. How to use CMS for site-specific spectra per CBC
iii. When s
hould CMS be used
When is this neede
d
i. per CBC
ii. when is this beneficial (i.e. when is the
Vs profile from the GMPE appropriate)
Soil over rock vs Vs profile c
orrection
i. CBC approach
ii. VS profile correction approa
ch
1. Why this approach makes more physical sense
iii.
Example comparison if time
Overview of analysis methods (equivalent
linear, nonlinear) and software
i. (SHAKE, deepsoil, flac, STRATA
– not getting super into detail)
Theory of directivity
i. Directivity models 1. Effect on the median GMPE
2. Effect on standard
deviation of GMPE
How to apply directivity
i. Range of appro
aches used in practice
ii. Recommended approach
1. PSH
A
2. DSHA
Directivity in time history selection
i.
Pulse motions approach
ii. instantaneous power (IP) approach
How do you know if you selected a good set of time histories?
i.
Spectral shape
1. How much peak-to-trough variability should
be included
ii. Secondary parameters
1. Duration
2. PGV
3. Arias intensity
4. CAV
Theory:
i
. Scale factors
1. What do scale factors tell us about the
ground motion
2. Use of limits on scale factors
ii. S
pectral matching
1. What is this doing?
2. Is spe
ctral matching a good thing?
Application of Scaling method
i.
How much peak-to-trough variability should be in the final set?
Appl
ication of Spectral matching methods
i. How to scale/spectrally mat
ch time histories with new CBC guidelines
ii. Software that can do
this
Dr. Abrahamson has been i nvolved in strong motion seismology for 18 years. He has extensive experien ce in the practical application of seismology to the development of determi nistic and probabilistic seismic criteria (response spectra, and/or time hi stories) for engineering design or analyses. He has been involved in develo ping design ground motions for hundreds of projects including dams, bridges , nuclear power plants, nuclear waste repositories, water and gas pipelines , rail lines, ports, landfills, hospitals, electric substations, and office buildings. About 3/4 of these projects have been in the Western US and the other 1/4 have been in the Eastern US or outside of the US.
As a con sultant, Dr. Abrahamson has been involved in the ground motion studies for several major engineering projects in California. Recent projects include t he Caltrans major toll bridge retrofit projects, the CalFed project for the Sacremento Delta levee system, the BART seismic retrofit project, and the SFO expansion. He has been involved in developing ground motion for nuclear plants and dams in the United States and in other countries. He served as the leader of the ground motion characterization team for the proposed high level nuclear waste repository at Yucca Mountain.
Attendees to the live webcasts will be able to ask questions for about 10-minutes at the conclusion of each session. On -line recordings will be available within 1-2 days after each session.
< h3>How to register:As this course is highly valuable, we have a thr ee-step registration process:
Please note: Once payment is process ed, your CalGeo login e-mail will give you access to the recorded sessions and materials in our new On-line Learning Library. Only individuals who have paid and registered for the course will have access to the on-line re cordings for up to 1-year.
Cost: Members $375, Non-m embers $750
Group Discount: If 5 or more people from one member company register they will receive a discount price of $300/pp! Use the code: 5ORMORE at checkout for the discount. Registrations can come in separately as lon g as there are 5 or more total from one company.
Don't forget to click on the link on the confi rmation page or the confirmation e-mail to register using GoToWebinar for t he live 6-week webseries!
CONTACT:Kelly Cabal, kelly@calgeo.org DTSTAMP:20240329T091750 DTSTART;TZID=America/Los_Angeles:20200605T110000 DTEND;TZID=America/Los_Angeles:20200605T123000 SEQUENCE:0 TRANSP:OPAQUE END:VEVENT END:VCALENDAR