the pacific earthquake engineering research center

The Pacific Earthquake Engineering Research Center headquarters at the University of California, Berkeley for more information see http://peer.berkeley.edu Framework for Performance-Based Earthquake Engineering (PBEE) Poster by H. Krawinkler and G. Deierlein (Stanford University) The PEER mission is to develop and disseminate technologies to support PBEE. The approach is aimed at improving decision-making about seismic risk by making the choice of performance goals and the tradeoffs that they entail apparent to facility owners and society at large. Intensity Measure Damage Measure drift as an EDP Engineering Demand Parameter drift as an EDP drift as an EDP • Collapse & Casualties • Direct Financial Loss •Downtime Decision Variable Measures of Performance: •Collapse &Casualties •Direct Financial Loss •Downtime Cost Functions Drywall partitions 0.0 0.2 0.4 0.6 0.8 1.0 0.0 0.4 0.8 1.2 1.6 2.0 2.4 Cost of Repair / Cost New Tape, Paste & Repaint Replacement of gypsum boards Partition replacement P($>x | DM) Drywall partitions 0.0 0.2 0.4 0.6 0.8 1.0 0.0 0.4 0.8 1.2 1.6 2.0 2.4 Cost of Repair / Cost New Tape, Paste & Repaint Replacement of gypsum boards Partition replacement P($>x | DM) Drywall Partitions with Metal Frame 0.0 0.2 0.4 0.6 0.8 1.0 0.000 0.005 0.010 0.015 0.020 EDP (IDR) DM 1 DM 2 DM 3 P(DM>dm | EDP) Damage Fragility Curves Drywall Partitions with Metal Frame 0.0 0.2 0.4 0.6 0.8 1.0 0.000 0.005 0.010 0.015 0.020 EDP (IDR) DM 1 DM 2 DM 3 P(DM>dm | EDP) Mean Loss Curve + ATC-58 definitions of performance assessment types Intensity-based: Probable facility performance, given intensity of ground motion Scenario-based: Probable facility performance, given a specific earthquake scenario Time-based: Probable facility performance in a specified period of time Impact – Implementation: • ATC-58 – Guidelines for Seismic Performance Assessment of Buildings • ATC-63 – Recommended Methodology for Quantification of Building System Performance • TBI – Tall Building Initiative • LRFD for bridge design Structural System Selection Based on Loss Risk Structural System Dom ain Loss D om ain ED P = M ax.Interstory D rift EDP = M ax.FloorA cceleration ED P = M ax.Interstory D rift EDP = M ax.FloorA cceleration M ean Subsystem Loss C urves ED P = M ax.Interstory D rift EDP = M ax.FloorA cceleration M ean IM -ED P C urves ED P = M ax.Interstory D rift ED P = M ax.Interstory D rift EDP = M ax.FloorA cceleration EDP = M ax.FloorA cceleration M ean IM -ED P C urves Driftsensitive subsystem s Accel.sensitive subsystem s Hazard Dom ain M ean H azard C urve M ean H azard C urve 10/50 10/50 Base Shear Deformation Damage Threshold Collapse Onset O P E N O P E N O P E N FEMA 356 Performance Levels IO LS CP PBEE yesterday $, % replacement 0 25% 50% 100% Downtime, days 0 1 7 30 180 Casualty risk 0.0 0.0001 0.001 0.01 0.25 PBEE today Base Shear Deformation Damage Threshold Collapse Onset O P E N O P E N O P E N O P E N O P E N O P E N FEMA 356 Performance Levels IO LS CP PBEE yesterday 0 Downtime, days 0 1 7 30 180 Casualty risk 0.0 0.0001 0.001 0.01 0.25 0 0 0 0 Casualty risk 0.0 0.0001 0.001 0.01 0.25 PBEE today Medina, 2002 Zareian, 2006 IM IM Stiff Systems: Larger loss in acceleration sensitive components and smaller loss in drift sensitive components Flexible Systems: Small loss in acceleration sensitive components and larger loss in drift sensitive components M EA N SPEC TR A L A C C . H AZARD CURVE - T = 1.8 sec. 0.0001 0.001 0.01 0.1 1 10 0 0.4 0.6 0.8 1.0 - = 1.8 sec. 0.0001 0.001 0.01 0.1 1 10 0 0.2 V an Nuys, CA, Horizontaλ Com ponent SpectraλAcceλeration S a (g) MEAN SPECTR AL ACC. HAZAR D CUR V E - T =1.8 sec. 0.0001 0.001 0.01 0.1 1 10 0 0.4 0.6 0.8 1.0 - =1.8 sec. 0.0001 0.001 0.01 0.1 1 10 0 0.2 V an Nuys, CA, Horizontaλ Com ponent SpectraλAcceλeration S a (g)

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O. O. O. P. P. P. E. E. E. N. N. N. Downtime, days. Downtime, days. 1 7 30 180. 1 7 30 180. 0. 0. Drywall Partitions with Metal Frame. Drywall Partitions with Metal Frame. P(DM>dm | EDP). P(DM>dm | EDP). P($>x | DM). - PowerPoint PPT Presentation

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The Pacific Earthquake Engineering Research Centerheadquarters at the University of California, Berkeleyfor more information see http://peer.berkeley.eduFramework for Performance-BasedEarthquake Engineering (PBEE)Poster by H. Krawinkler and G. Deierlein (Stanford University)The PEER mission is to develop and disseminate technologies to support PBEE. The approach is aimed at improving decision-making about seismic risk by making the choice of performance goals and the tradeoffs that they entail apparent to facility owners and society at large. Intensity MeasureDamage MeasureEngineering Demand Parameterdrift as an EDPdrift as an EDPCollapse & CasualtiesDirect Financial LossDowntimeDecision VariableMeasures of Performance:

Collapse &CasualtiesDirect Financial LossDowntime Cost FunctionsDamage Fragility CurvesMean Loss Curve+ATC-58 definitions of performance assessment typesIntensity-based:Probable facility performance, given intensity of ground motionScenario-based:Probable facility performance, given a specific earthquake scenarioTime-based: Probable facility performance in a specified period of timeImpact Implementation:

ATC-58 Guidelines for Seismic Performance Assessment of BuildingsATC-63 Recommended Methodology for Quantification of Building System PerformanceTBI Tall Building InitiativeLRFD for bridge designStructural System Selection Based on Loss RiskBase ShearDeformationDamage ThresholdCollapseOnsetFEMA 356 Performance LevelsIOLSCPPBEE yesterday$, % replacement025% 50% 100%Casualty risk0.00.0001 0.001 0.01 0.25PBEE todayBase ShearDeformationDamage ThresholdCollapseOnsetOPENOPENOPENOPENOPENOPENFEMA 356 Performance LevelsIOLSCPPBEE yesterday0Casualty risk0.00.0001 0.001 0.01 0.250000Casualty risk0.00.0001 0.001 0.01 0.25PBEE todayMedina, 2002Zareian, 2006IMIMStiff Systems: Larger loss in acceleration sensitive components and smaller loss in drift sensitive componentsFlexible Systems: Small loss in acceleration sensitive components and larger loss in drift sensitive components