IMPLEMENTATION OF SCEC RESEARCH IN EARTHQUAKE ENGINEERING

• ONGOING PROJECTS

• SCEC PROPOSAL TO NSF

• SCEC 2004 RFP

I MPLEMENTATI ON OF SCEC RESEARCH I N EARTHQUAKE ENGI NEERI NG – ONGOI NG PROJ ECTS

THEME PROJECT INVESTIGATORS

SPONSORS

Ground-Motion Prediction using Rupture Dynamics

Pseudo-Dynamic Modeling Project

Beroza, Guatteri PEER-Lifelines, SCEC

3D Basin Code Validation Project

Day, Bielak, Dreger, Graves, Larsen, Olsen, Pitarka

PEER-Lifelines, SCEC

Ground-Motion Simulation Code Validation Foamquake Data Interp.

Project: Phase 1: Modeling of directivity Phase 2: Validation of source inversion procedures

Day, Graves, Pitarka, Silva, Zeng

PEER-Lifelines, admin through SCEC

I MPLEMENTATI ON OF SCEC RESEARCH I N EARTHQUAKE ENGI NEERI NG – ONGOI NG PROJ ECTS

THEME PROJECT INVESTIGAT

ORS SPONSORS

Object Oriented PSHA Framework Project (Open-PSHA)

Field SCEC

PSHA Code Validation Project

Field - validate Open-PSHA

PEER-Lifelines

Surface Faulting Hazard Rockwell PEER-Lifelines

Probabilistic Seismic Hazard Analysis

Vector-Valued Hazard Project

Somerville, Cornell

SCEC, PEER

I MPLEMENTATI ON OF SCEC RESEARCH I N EARTHQUAKE ENGI NEERI NG – ONGOI NG PROJ ECTS

THEME PROJECT INVESTIGAT

ORS SPONSORS

Ground-Motion Time Histories

Time Histories for PEER Performance-Based Earthquake Engineering Testbeds

Somerville PEER, SCEC

Ground-Motion Prediction Model

PEER-LL/SCEC/USGS Next Generation Attenuation Project

Anderson, Beroza, Day, Graves, Olsen, Somerville, Zeng

PEER-Lifelines, SCEC

Interface Interface Workshop Somerville SCEC

Loss Estimation Loss Estimation Methodology for Evaluating Societal Impacts of Alternative Seismic Hazard Models

Campbell SCEC

Source and Path Effects

• Distance and magnitude scaling• Footwall/hanging wall• Style of faulting• Directivity• Buried vs. surface faulting• Static stress drop (ruptured area) and other

(dynamic) stress parameters• Other fault properties• 3-D basin

Simulation of Rock Motion

• Extrapolation beyond data

• Use of numerical simulations to guide the extrapolation

Rock

Final Product (Integration of Individual Research)

• Attenuation models for spectral acceleration (5% Damped), PGA, PGV, and PGD– Horizontal components (fault normal, fault

parallel, and average components)– Shallow crustal earthquakes in CA– Magnitude range: M5 - M8.5– Distance range: 0 - 200 km– Period range: 0.0 (PGA) - 10 seconds

Stakeholders

• Caltrans

• PG&E

• Bay Area Rapid Transit (BART)

• East Bay Municipal Utility District (EBMUD)

• Southern California Edison

• California Department of Water Resources

• Division of Safety of Dams (DSOD)

• Federal Energy Regulatory Commission (FERC)

• U.S. Bureau of Reclamation

Improved Intensity Measures

• Criteria:Efficiency (to reduce dispersion)Sufficiency (incorporate all relevant

aspects of earthquake hazard, M-R + ???)

• Scalar or Vector Intensity Measures

• IM versus Improved Record Selection

Ref: H. Krawinkler

Ground Motions Intensity Measure

ELASTIC STRENGTH DEMAND SPECTRAScaled Records (T=2.0 s), LMSR, = 0.05

0

0.5

1

1.5

2

0 1 2 3 4 5

T (s)

Sa

(g)

Median84%NEHRP 94 Soil D

Ref: H. Krawinkler

Improved IM …Vector IMs ?

Sa(T1)

Sd,inelastic

Tp (for NF)

Duration

Ref: H. Krawinkler

Sa(T2 …)

PGV or Sv(T1)

Alternative Hazard IM: SaRSa

Sa(T1)

Sa(T*1)Sa(T1)

Sa(T*1)

Figure 5 – IDA plot of IDR versus (left) Sa(T1) and (right) SaRsa

IDRMAX

0.000.020.040.060.080.100.120.140.160.180.20SaR

Sa

0

1

2

3

IDRMAX

0.000.020.040.060.080.100.120.140.160.180.20

Sa (T1,5%

)

0

1

2

3

4

5

6IV79-A6 LP89-LG LP89-LX EZ92-EZ NR94-NH NR94-RS NR94-SY KB95-JM

Tp/T1 > 1

Tp/T1 < 1

IDRmax

Sa(T1)

Figure 5 – IDA plot of IDR versus (left) Sa(T1) and (right) SaRsa

IDRMAX

0.000.020.040.060.080.100.120.140.160.180.20

SaR

Sa

0

1

2

3

= 0.9TF = 1.8T1

IDRMAX

0.000.020.040.060.080.100.120.140.160.180.20

Sa (T1,5%

)

0

1

2

3

4

5

6IV79-A6 LP89-LG LP89-LX EZ92-EZ NR94-NH NR94-RS NR94-SY KB95-JM

Tp/T1 > 1

Tp/T1 < 1SaRsa

RsaSa(T1) / Sa (T1*)

T1

Vector Valued Seismic Hazard(SCEC – PEER Collaborative Project)

• Frequency of simultaneous occurrence of more than one ground motion parameter

• Current work: 2 parameters: Response spectral acceleration at the fundamental and first higher mode of a building; now extending to more than two parameters

• Future work: 2 parameters: Period and peak velocity of the rupture directivity pulse

Scalar and Vector Engineering Demand Parameters at Van Nuys Hotel

10-3

10-2

10-1

10-3

10-2

10-1

100

max

max

IM = SaIM = (Sa, R(T2 = 1.0s))IM = (Sa, )

IMPLEMENTATION OF SCEC RESEARCH IN EARTHQUAKE ENGINEERING –

NSF Proposal for 2004

• Task 1. Ground Motion Time Histories for use in Performance-Based Earthquake Engineering

• Task 2. PEER-Lifelines/SCEC/USGS Next Generation Attenuation (NGA) Program

• Task 3. Seismic Hazard Analysis

• Task 4. Ground-Motion and Structural Simulations for Scenario Earthquakes in Los Angeles

I MPLEMENTATI ON OF SCEC RESEARCH I N EARTHQUAKE ENGI NEERI NG – 2004 SCEC RFP

THEME PROJECT POTENTIAL CO-SPONSORS

Provide spatial wave-field and distributed input ground motions for bridges

PEER

Provide ground motion time histories for use in earthquake engineering testing facilities and simulation software

NEES

Ground Motion Time Histories

Validation of simulated ground motions for performance assessment of buildings and bridges, including site effects

PEER

Exchange information on information technologies NEES Information Technology

Simulation and visualization of earthquake hazards, ground motions, geotechnical/structural response and damage

PEER

I MPLEMENTATI ON OF SCEC RESEARCH I N EARTHQUAKE ENGI NEERI NG – 2004 SCEC RFP

THEME PROJECT POTENTIAL CO-SPONSORS

Improved regional site response factors from detailed surface geology and from geotechnical borehole data bases

(follow through on SCEC Phase III)

CGS,

PEER-Lifelines

Seismic velocity profiles from micro-tremor arrays for deep Vs profiles to complement SASW testing

PEER-Lifelines

Ground Motion Response

Mapping of basin edge effects using geological data consistent with engineering model from the “Basins” project (see Table 1)

CGS, PEER-Lifelines

Identify damaging characteristics of ground motions, and mapping of associated hazard intensity measures

PEER Relationship Between Ground Motion Characteristics and Building Response

How ground motions enter low-rise buildings PEER

I MPLEMENTATI ON OF SCEC RESEARCH I N EARTHQUAKE ENGI NEERI NG – 2004 SCEC RFP

THEME PROJECT POTENTIAL CO-SPONSORS

Societal Implications of Earthquake Hazard

Risk and implications of earthquake hazards on distributed lifeline systems and regional economies

PEER, PEER-Lifelines

Ground Motion Prediction Model

Next Generation Attenuation Ground Motion Model PEER-Lifelines

Loss Estimation Loss Estimation Methodology for evaluating societal impacts of SCEC Products such as alternative RELM fault models or alternative ground motion models