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Publication - Dr Irina Lazar

    The impact of vibration-controlled systems in catastrophe modelling


    Radu, A & Lazar, I, 2018, ‘The impact of vibration-controlled systems in catastrophe modelling’.


    Catastrophe (CAT) modelling is a field that combines science and engineering to assess natural and man-made catastrophe risk to allow the risk-takers to better understand and manage their risks. CAT modelling has an
    essential role in the (re)insurance industry, in which probabilistic models are used to quantify the risk of perils, such as earthquakes. The purpose of this paper is to analyse whether the implementation of vibration-control systems can reduce the seismic risk.
    The CAT modelling framework described in this paper is for a hypothetical settlement, located in a seismic zone. Three main components are essential in CAT modelling: the hazard, the exposure, and the engineering parts, each modelled, in this paper, using simplified approaches. The seismic hazard is described by a probabilistic model for earthquakes characterized by two parameters, the moment magnitude and the epicentral distance. The
    exposure is represented by a deterministic distribution of buildings idealized as single-degree-of-freedom linear and non-linear systems. Finally, the engineering part develops two sets of empirical vulnerability curves for the
    vibration-uncontrolled and controlled systems, using a dataset of real ground-motion records. The seismic risk of the portfolio of controlled and uncontrolled systems will be evaluated in terms of metrics used in CAT modelling, such as the annual average loss, and the exceedance-probability curves, which indicate the loss
    expected to occur at given intervals of time.

    Full details in the University publications repository