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---
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title: ShakeCast AEBM Workbook
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tags: [getting_started, workbook, advanced]
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keywords: advanced, engineering, building, module, workbook
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folder: Workbook
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---
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[[_TOC_]]
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The ShakeCast Advanced Engineering Building Module (AEBM) Workbook was created to evaulate the tentative framework for real-time ShakeCast calculation of building damage based on the HAZUS AEBM technology (FEMA 2003). The HAZUS AEBM methodology was adapted by the California Office of Statewide Health Planning and Development (OSHPD) for collapse evaluation of older seismically-deficient hospital buildings (CBC 2007), by the Federal Emergency Management Agency (FEMA) for the recent update of FEMA 155 methods for rapid visual screening of buildings for potential seismic hazards (FEMA 2015) and by the Department of Veterans Affairs for seismic risk assessment of VA hospital buildings (NIBS 2010).
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Advanced ShakeCast users with protfolio-specific building properties can use the ShakeCast AEBM Workbook to investigate the accuracy of the HAZUS AEBM calculation. It is available upon request for use along with the ShakeCast V4 [pyCast](/pyCast/ShakeCast_AEBM) application.
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![AEBM Workbook](../uploads/AEBM_Workbook.png)
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### Performance Point
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The ShakeCast AEBM module implements the structual damage states described in the Excel Workbook. Structural damage states are a function of peak response displacement which is calculated by the intersection of the demand spectrum of the site of interest and capacity curve of building of interest (referred to as the "performance point").
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### Demand Spectrum Shape (Frequency Content)
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Currently frequency content of demand spectra for earthquake ground motions defined by only four ShakeMap response periods (PGA, 0.3s, 1s and 3s). The shape of HAZUS AEBM demand spectra is based on the standard spectrum shape of Seismic Codes which is defined by three domains of constant response spectral acceleration, constant response spectral velocity and constant response spectral displacement. As such, frequency content of demand spectra can only approximate the frequency content of multi-period response spectra, to be implemented in ShakeMap in the future.
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### Interpolation of Demand Spectra and Capacity Curves
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The performance point was evaulated using straight line interpolation between discrete points of demand spectra and capacity curves at 50 response periods of the PEER NGA West2 GMPEs.
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Conceptually, users would provide the values of various building capacity, response, damage parameters required for calculation of building damage. The ShakeCast AEBM module generates requisite building capacity curves, damage curves from the user's input and ShakeCast databases of building parameters. |
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