OpenQuake 0.5 Risk Non_Linear_Static_Methods

This set of methods combines a capacity curve (non-linear response of an asset when subject to static loading) with a response spectrum to find the non-linear response, or "performance point" of the asset. Once the performance point is found, the "fragility & consequence function based risk assessment" methods can be used to calculate damage and loss.

Notes

• Assumptions

  • Capacity curves are available for the exposed assets
  • Acceleration-displacement response spectra are produced by the hazard code
  • Fragility functions in terms of the response parameter are available

• Design Using a spectrum (e.g: acceleration, displacement) provided by the hazard engine, and the characteristics of the structure from the capacity curves, the non-linear response of a building typology will be calculated. This can be used to estimate the damage state of each asset through fragility functions. This damage state can finally be related to an absolute loss through the use of consequence functions.

• User stories:

  • Expand NRML schema to support capacity curves for a portfolio of assets
  • Calculate the non-linear response of the structures
  • Estimate the damage state based on a set of fragility functions and performance point
  • Calculate absolute losses from the damage distribution, using consequence functions

• Suggested Implementation

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