Introduction
This entry provides a primer for earthquake-related fragility, vulnerability, and risk. Many of its concepts can be applied to other perils. Section “Fragility” discusses fragility – the probability of an undesirable outcome as a function of excitation. Vulnerability (the measure of loss as a function of excitation) is discussed in section “Vulnerability.” Section “Hazard” presents enough information about seismic hazard for the reader to understand risk, which is discussed in section “Risk for a Single Asset.” Section “Conclusions” provides brief conclusions. For solved exercises, see Porter (2014).
Fragility
Uncertain Values
Many of the terms used here involve uncertain quantities, often called random variables. “Uncertain” is used here because it applies to quantities that change unpredictably (e.g., whether a tossed coin will land heads or tails side up on the next toss) and to quantities that do not vary but that are not known with certainty. For example, a particular...
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Porter, K. (2021). A Beginner’s Guide to Fragility, Vulnerability, and Risk. In: Beer, M., Kougioumtzoglou, I., Patelli, E., Au, IK. (eds) Encyclopedia of Earthquake Engineering. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-36197-5_256-1
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