FEMA HAZUS Risk Assessment Capabilities Project, SCEC Presentation Damage Estimation for Buildings and Lifelines Brian Kehoe, S.E. Wiss, Janney, Elstner Associates, Inc.

FEMA HAZUS Risk Assessment Capabilities Project, SCEC Presentation General Building Stock Database Representation Aggregated on Census Tract Level 15 Basic Building Types –Building Types Based on ATC 13 –Wood –Steel –Concrete –Masonry –Further Categorizations –Height –Design Level –Quality

FEMA HAZUS Risk Assessment Capabilities Project, SCEC Presentation General Building Stock Data Basic Supplied Data –Square Footage by Occupancy –Based on Publicly Available Information Data Manipulation –Occupancy to Building Type Mapping –Average Building Area by Occupancy Type Resulting Data –Number of Buildings by Type –Number of Buildings by Occupancy

FEMA HAZUS Risk Assessment Capabilities Project, SCEC Presentation Occupancy to Building Type Mapping Default Mapping Schemes –Same Scheme Applied to Each Census Tract –By Region and by Age of Construction –By State for Single Family Residential (R1) Custom Mapping –Used to Improve Building Stock Data –Simple Mapping Scheme Creation –Detailed Mapping –Based on Imported Data –Based on Surveys –Expert Opinions Needed

FEMA HAZUS Risk Assessment Capabilities Project, SCEC Presentation Damage Modeling Building Damage Related to Displacement Capacity Curve For Each Building Type Ground Motion Determined From PESH Module For Each Census Tract –PGA –Spectral Acceleration at 0.2 seconds –Spectral Acceleration at 1.0 seconds Building Response Calculated for Each Building Type In Each Census Tract Using Pushover Analysis (Nonlinear Static Procedure)

FEMA HAZUS Risk Assessment Capabilities Project, SCEC Presentation Building Response Calculation Performance Point

FEMA HAZUS Risk Assessment Capabilities Project, SCEC Presentation Building Damage Levels Five Damage States Defined –None –Slight –Moderate –Extensive –Complete Fragility Curves Relate Displacement to Damage States for Each Building Type Results Expressed in Percentage of Building in Each Damage State Damage Results Used for Calculating Economic Losses

FEMA HAZUS Risk Assessment Capabilities Project, SCEC Presentation Site Specific Building Response Site Specific Response for Important Buildings –Hospitals –Schools –Emergency Operations Centers –User Defined Based on Ground Motion at Site Rather Than at Centroid of Census Tract Damage Results Used for Other Modules –Sheltering –Functionality

FEMA HAZUS Risk Assessment Capabilities Project, SCEC Presentation Lifelines Categories –Transportation –Infrastructure –Facilities –Utilities –Infrastructure –Facilities Representation –Linear Elements (eg Roads and Pipelines) –Site Specific Elements (eg Buildings and Bridges) –Distributed by Census Tract (eg Distribution Piping)

FEMA HAZUS Risk Assessment Capabilities Project, SCEC Presentation Lifelines Data Default Data –Fairly Complete Data for Highways and Highway Bridges –Partial Data for Other Transportation Systems –Limited Data for Utilities Additional Data –Facility Location and Construction –Considered Somewhat Proprietary –Needed to Get Improved Results

FEMA HAZUS Risk Assessment Capabilities Project, SCEC Presentation Lifelines Damage Assessment Site Specific Ground Motion from PESH Module Damage Assessment –Similar Methodology to Building Damage –Damage Based on PGA, PGV, or PGD Fragility Curves –Separate Curves for Each Lifeline Component Type –Additional Damage Calculations for Some Components –Rate of Leakage and Breaks in Pipes –Functionality of Utility Systems Results Used for Calculating Losses/Functionality