The Pacific Earthquake Engineering Research Center

1. 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($>x | DM) P($>x | DM) Drywall partitions Drywall partitions 1.0 1.0 1.0 1.0 0.8 0.8 0.8 0.8 0.6 0.6 0.6 0.6 0.4 0.4 0.4 0.4 DM 1 DM 1 0.2 0.2 Tape, Paste & Repaint Tape, Paste & Repaint 0.2 0.2 DM 2 DM 2 Replacement of gypsum boards Replacement of gypsum boards Partition replacement Partition replacement DM 3 DM 3 0.0 0.0 0.0 0.0 0.0 0.0 0.4 0.4 0.8 0.8 1.2 1.2 1.6 1.6 2.0 2.0 2.4 2.4 0.000 0.000 0.005 0.005 0.010 0.010 0.015 0.015 0.020 0.020 Cost of Repair / Cost New Cost of Repair / Cost New EDP (IDR) EDP (IDR) drift as an EDP Framework for Performance-Based Earthquake Engineering (PBEE) O O O O O O P P P P P P E E E E E E N N N N N N 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. Collapse Collapse Base Base Damage Damage Onset Onset Threshold Threshold Shear Shear Deformation Deformation PBEE yesterday PBEE yesterday FEMA 356 Performance Levels FEMA 356 Performance Levels IO IO LS LS CP CP PBEE today PBEE today 25% 50% 100% $, % replacement 0 0 0 0 Casualty risk Casualty risk Casualty risk 0.0001 0.001 0.01 0.25 0.0001 0.001 0.01 0.25 0.0001 0.001 0.01 0.25 0.0 0.0 0.0 0 0 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 Decision Variable • Measures of Performance: • Collapse &Casualties • Direct Financial Loss • Downtime • Collapse & Casualties • Direct Financial Loss • Downtime Damage Fragility Curves Cost Functions Mean Loss Curve Damage Measure + Engineering Demand Parameter drift as an EDP drift as an EDP Intensity Measure Medina, 2002 Structural System Selection Based on Loss Risk • 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 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 Zareian, 2006 The Pacific Earthquake Engineering Research Center headquarters at the University of California, Berkeley for more information see http://peer.berkeley.edu Poster by H. Krawinkler and G. Deierlein (Stanford University)