FEMA P-58-3, Seismic Performance Assessment of Buildings, Volume 3 – Supporting Electronic Materials and Background Documentation, Third Edition, consists of a series of electronic products assembled to assist engineers in conducting seismic performance assessments and in understanding the technical basis of the methodology. The Second Edition was published in 2016 with the release of interim updates to PACT and underlying fragility and consequence data. The Third Edition is published on this website and includes the latest version of PACT, along with additional updates to fragility and consequence data, and added tools and background documentation. The following electronic tools and documents are included:
Supporting Materials
3.1 Performance Assessment Calculation Tool (PACT) – Executable Software for PACT version 3.1.2
PACT is an electronic calculation tool, and repository of fragility and consequence data, that performs the probabilistic calculations and accumulation of losses described in the methodology. It includes a series of utilities used to specify building properties and update or modify fragility and consequence information in the referenced databases. An executable file (.exe) is provided to facilitate installation of the tool. FEMA P-58, Volume 2, Appendix C presents a User Manual for PACT.
3.2 Provided Fragility Data
This folder contains the following products to aid in the management and maintenance of all provided fragility and consequence data outside of PACT and to assist in the development of consequences for custom fragility specifications:
- Fragility Database is an Excel workbook that is used to review and maintain all provided fragility and consequence data outside of PACT. This database has been updated for the Second Edition release and includes environmental impact consequence information.
- Fragility Specification is a PDF file displaying the contents of the fragility database. Each fragility specification contains fragility and consequence data for the component of interest, in a one-page format. Damage states are illustrated with photos of representative damage, when available.
- PACT Input Matrix is an Excel workbook that contains the Fragility Database in a format that is required for upload into PACT.
- Consequence Estimation Summary is an Excel workbook that provides the basis for provided consequence data, and can be used to assist in estimating consequences for custom fragility specifications.
3.3 Normative Quantity Estimation Tool
This tool is an Excel workbook designed to assist in estimating the type and quantity of nonstructural components typically present in buildings of a given occupancy and size. The Normative Quantity Estimation Tool provides approximate quantities based on building occupancy and square footage. Appendix D of FEMA P-58, Volume 2 presents a User Manual for this tool.
3.4 Performance Estimation Tool (PET)
PET is an Excel workbook that utilizes assessment results from the application of the FEMA P-58 methodology to a group of archetypical building representative of structures conforming to the seismic design requirements of the current building code. The tool can be used as a design aid to obtain an initial estimate of required design strength and drift ratio necessary to achieve a desired performance objective. PET is used to directly evaluate the effects of varying assumptions on performance, and to directly determine the strength and stiffness required to meet selected performance objectives. This approach, along with recommendations for extrapolating beyond limitations in available data, is described in FEMA P-58, Volume 6, Section 4.4.
3.5 Static Pushover to Incremental Dynamic Analysis (SPO2IDA)
SPO2IDA is an Excel workbook application that was originally developed by Vamvatsikos and Cornell (2006). This tool uses empirical relationships from a large database of incremental dynamic analysis results to convert static pushover curves into probability distributions for building collapse as function of ground shaking intensity.
3.6 Collapse Fragility Tool
The Collapse Fragility Tool is an Excel workbook application that fits a lognormal distribution to collapse statistics obtained from a series of nonlinear dynamic analyses at different ground motion intensity levels.
Background Documentation
FEMA P-58 Background Documents are a series of reports documenting the technical background and source information for key aspects of the FEMA P-58 methodology and its implementation. Background Documents were developed by consultants, serving at various levels within the project hierarchy, reporting the results of: (1) decisions on technical development protocols; (2) focused studies on the development of key aspects of the methodology; (3) documentation of recommended procedures; and (4) collection of available data for the development of structural and nonstructural fragilities. They were initially intended to serve as a record of the technical state-of-knowledge at the time they were produced, and as resources for the development of the eventual project reports. As such, they represent a snapshot in time, and may, or may not, match the technical content, recommended procedures, or data incorporated into the final methodology and its implementation.
Select a series, below, to download a .zip file of the background documents listed.
[widgetkit id="2" name="Background Documentation"]