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OQ-VMTK v1.0.0

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@mouayed-nafeh mouayed-nafeh released this 04 Nov 15:39
· 3 commits to oq-vmtk-v1.0 since this release
v1.0.0
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OQ-VMTK Release Notes

Vulnerability Modeller's Toolkit (OQ-VMTK) – Version 1.0.0

The OQ-VMTK is an open-source toolkit developed by the Global Earthquake Model (GEM) Foundation for earthquake engineers and vulnerability modellers. It enables modeling and assessment of structures via single- and multi-degree-of-freedom (SDOF/MDOF) systems, supporting both linear and nonlinear analyses, with a focus on improving the reliability of regional vulnerability models for large-scale earthquake risk applications.

Key Features

  • Ground Motion Record Processing: Calculate ground shaking intensity based on various intensity measure (IM) types such as PGA, SA(T), Saavg, FIV3, etc.

  • Modeling & Calibration: Define and model idealised stick-and-mass models with user-specific storey count and force-deformation relationships, powered by OpenSeesPy.

  • Analysis Suite

    • Modal Analysis: Calculate modal properties (i.e., periods of vibration and mode shapes)
    • Nonlinear Static: Conduct static or cyclic pushover analyses to characterise the lateral load-resisting and energy dissipation capacity of the idealised model.
    • Nonlinear Dynamic: Conduct nonlinear time-history analyses (NLTHA) and extract engineering demand parameters such as peak floor displacements and accelerations, as well as inter-storey drifts.

  • Fragility & Vulnerability

    • Probabilistic seismic demand modeling (IM-EDP relationships)
    • Fragility function fitting with multiple approaches (lognormal CDF, GLM, ordinal).
    • Generate storey loss functions (SLFs) to leverage the seismic demands from NLTHA for refined loss assessment applications
    • Vulnerability curve (Loss vs IM) modelling with uncertainty treatment.

  • Visualization

    • Plot model overviews, peak response distributions, fragility functions, SLFs and vulnerability models.

Installation

  • Supports Windows and Linux (Python 3.11/3.12).
  • Virtual environment recommended.
  • Install dependencies from requirements.txt and install the package in editable mode.

Getting Started

License

  • Licensed under AGPL v3.
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