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Development of Corresponding Building Code “Design” Maps

Development of Corresponding Building Code “Design” Maps. USGS Workshop on Seismic Hazards of Guam/Northern Mariana Islands & American Samoa. Nicolas Luco Research Structural Engineer. USGS – Golden , CO. Hazard Map (2%-in-50yrs P.E.). Risk-Targeted Map (1%-in-50yrs P.C.).

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Development of Corresponding Building Code “Design” Maps

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  1. Development of Corresponding Building Code “Design” Maps USGS Workshop on Seismic Hazards of Guam/Northern Mariana Islands & American Samoa Nicolas Luco Research Structural Engineer USGS – Golden, CO

  2. Hazard Map (2%-in-50yrs P.E.) Risk-Targeted Map (1%-in-50yrs P.C.) MCER Map (’12 IBC) MCE Map (≤‘09 IBC) Deterministic Map Deterministic Map (min) (min) Risk Coefficient Map Hazard Curves + scaling to max direction

  3. HAZARD Maps  DESIGN Maps • e.g., 2014 Update of USGS Hazard Maps 2014 2016 2018 NEHRP Prov’s ASCE 7 Standard Intl Bldg Code

  4. Design Maps Development Schedule • Jan 3, ’12: Placeholder 2015 IBC change proposal submitted • Jan 11, ‘12: Presented placeholder design maps to BSSC PUC USGS Workshop on Seismic Hazards of Guam/Northern Mariana Islands & American Samoa “Development of Corresponding Building Code ‘Design’ Maps,” N. Luco, USGS July 6, 2012

  5. 9) Design Maps for Guam 300% g Under Review SS 315% g SS ASCE 7-10 2014 NEHRP? Under Review 75% g S1 S1 Building Seismic Safety Council (BSSC) Provisions Update Committee (PUC) Meeting “Briefing on PUC Design Mapping Task Group,” N. Luco, USGS January 11, 2012

  6. 9) Design Maps for American Samoa 50% g Under Review 75% g SS SS ASCE 7-10 2014 NEHRP? Under Review 20% g S1 S1 Building Seismic Safety Council (BSSC) Provisions Update Committee (PUC) Meeting “Briefing on PUC Design Mapping Task Group,” N. Luco, USGS January 11, 2012

  7. Design Maps Development Schedule • Jan 3, ’12: Placeholder 2015 IBC change proposal submitted • Jan 11, ‘12: Presented placeholder design maps to BSSC PUC • Jan-Apr, ‘12: USGS hazard models completed (& published) • May 5, ‘12: Requested disapproval of placeholder IBC proposal • May 9, ‘12: Presented finalization plans to BSSC PUC … USGS Workshop on Seismic Hazards of Guam/Northern Mariana Islands & American Samoa “Development of Corresponding Building Code ‘Design’ Maps,” N. Luco, USGS July 6, 2012

  8. Design Maps Development Schedule • July, ‘12: Public workshop to finalize consensus hazard models • July-Aug, ‘12: Ballot final design maps through BSSC PUC • July 31, ‘12: Submit final design maps to IBC as public comment • Aug-Sep, ‘12: Public forums in Guam & American Samoa • Oct 9-10, ‘12: Resolve BSSC PUC vote/comments • Oct 22-28, ‘12: Final Action Hearings for 2015 IBC • Nov, ‘12: DOD Unified Facilities Criteria update finalized USGS Workshop on Seismic Hazards of Guam/Northern Mariana Islands & American Samoa “Development of Corresponding Building Code ‘Design’ Maps,” N. Luco, USGS July 6, 2012

  9. Questions for Today • Do the (published) USGS hazard models for Guam & American Samoa need to be revised? • If so, in what way? • If not, what are the explanations for the differences w.r.t. previous estimates (e.g. the 1997 NEHRP Provisions)? USGS Workshop on Seismic Hazards of Guam/Northern Mariana Islands & American Samoa “Development of Corresponding Building Code ‘Design’ Maps,” N. Luco, USGS July 6, 2012

  10. 9) Design Maps for Guam 285% g SS SS 275% g ASCE 7-10 2014 NEHRP? 70% g S1 S1 Building Seismic Safety Council (BSSC) Provisions Update Committee (PUC) Meeting “Briefing on PUC Design Mapping Task Group,” N. Luco, USGS May 9, 2012

  11. 9) Design Maps for American Samoa 30% g 40% g SS SS ASCE 7-10 2014 NEHRP? 15% g S1 S1 Building Seismic Safety Council (BSSC) Provisions Update Committee (PUC) Meeting “Briefing on PUC Design Mapping Task Group,” N. Luco, USGS May 9, 2012

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