SP3 Risk Model

Inspection of Seismic Damage

Based on several years of research and development after the initial 2014 release of our SP3 Design tool, the SP3 RiskModel provides extensive automation that can produce a building and site specific risk assessment without an expensive engineering evaluation. This Risk Model can be run with minimal inventory-type information (building location, size, etc.) and can accept an extensive range of detailed building information if it is available. This tool is tailored for preliminary resilient design, advanced due-diligence assessments, and insurance risk applications.

SP3 RiskModel Features

  • Soil Database

    Provides automated soil and VS30 look-up.

  • Hazards Database

    Provides automated soil-specific hazard information.

  • Building Code Design Database

    This provides site-specific design information based on lat/long and building age, including digitized design maps, covering current design back to the 1927 Uniform Building Code. This database includes both seismic and wind design and is used to determine building design strength, design stiffness, and design information for non- structural components.

  • Dynamic Structural Properties Engine

    This Engine creates an archetype structural model for the building, leveraging many other source SP3 databases. This includes modal information based on building type and design information, accounts for the strength and stiffness contribution of the gravity system and non-structural components, and accounts for other sources of design overstrength.

  • Structural Response Prediction Engine

    This Engine computes the nonlinear structural responses of the building (nonlinear drifts, floor accelerations, etc.), in a manner that is specific to the design and dynamic properties of the building. This Engine uses the SP3 Structural Responses Database which includes millions of structural response results from nonlinear dynamic time-history analyses.

  • Component Population Engine

    This Engine populates the structural and non-structural components into the damage model, in a manner that is consistent with the building occupancy, structural design or retrofit data, non-structural design or retrofit date, and building code design requirements for the specific site location for the date of construction.

  • Fragilities Database

    The fragilities database includes detailed information on damageability, repair costs, and repair times for nearly one thousand building components. This includes the 796 fragility components from the publically-available FEMA P-58 database, supplemented by the 174 additional fragilities created by the SP3 team with input from SP3 users.

  • Monte Carlo Risk Analysis Engine

    This Engine then runs the detailed statistical analysis incorporating all of the information from the previous Engines and Databases. This results in detailed building-specific vulnerability curves, for repair costs and repair time, which quantify both the average values and the uncertainties in the risk.

SP3 RiskModel Scope

The scope of the SP3 RiskModel is broad and covers all common types of buildings in the United States. Available building types and applicable height ranges are listed in the following table.

Structural System Type Maximum Stories
Tilt-up (RWFD) - Concrete wall panels 1
Tilt-up (RWFD) - Reinforced masonry walls 1
Wood Light Frame 5
Wood Light Frame over Podium (RC Walls) 7
Wood Light Frame over Podium (RC Frames) 7
Steel Light Frame 5
Steel Light Frame over Podium (RC Walls) 7
Steel Light Frame over Podium (RC Frames) 7
Steel Moment Frame - Perimeter 25
Steel Moment Frame - Space 25
Steel Braced Frame - concentric 25
Steel Braced Frame - eccentric 25
Steel Braced Frame - buckling-restrained (general) 25
Steel Braced Frame - buckling-restrained (CoreBrace) 25
Reinforced Concrete Moment Frame - Perimeter 25
Reinforced Concrete Moment Frame - Space 25
Reinforced Concrete Shear Wall - Cantilever 25
Reinforced Concrete Shear Wall - Coupled 25
Reinforced Concrete Dual-System - RC Wall with RC Frames 25
Reinforced Concrete Dual-System - RC Wall with Steel Frames 25
Reinforced Masonry - Rigid diaphragms 5
Precast - PRESS/ClarkPacific post-tensioned frame system 25

Currently, risk assessment leveraging the SP3 RiskModel is only available through the SP3 Batch service. A tool providing individual project use is in development and an early-adopter client group is currently forming in advance of its release. Please contact us if you would like to participate in this group.

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