Development of fragility curves for use in seismic risk targeting

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Gkimprixis, Athanasios and Douglas, John and Tubaldi, Enrico and Zonta, Daniele (2018) Development of fragility curves for use in seismic risk targeting. In: 16th European Conference on Earthquake Engineering, 2018-06-18 - 2018-06-21.

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Abstract

Many studies have shown that designing structures in a region by applying the ‘uniform hazard’ principle does not guarantee that the risk of collapse throughout this region will also be uniform. In other words, using constant-return-period ground motions for design leads to structures exposed to different levels of earthquake risk, even though they are designed according to the same regulations. Recently, a more sophisticated approach, often referred to as ‘risk-targeting’, has been developed and applied in practice in the US, while studies have also been conducted for France, Romania and Indonesia, as well as for the whole of Europe. In this study, we design, based on Eurocodes 2 and 8, a set of six reinforced concrete buildings corresponding to different geometries and two levels of design peak ground acceleration (0.1 and 0.3g). The response of these buildings to earthquake shaking is modelled numerically using state-of-the-art computer software to develop fragility curves for different limit states. We find that while the design acceleration has some influence on the fragility curves, other parameters such as the number of storeys also affect them. These preliminary results are useful for improving the procedures for risk-targeting.

ORCID iDs

Gkimprixis, Athanasios, Douglas, John ORCID logoORCID: https://orcid.org/0000-0003-3822-0060, Tubaldi, Enrico and Zonta, Daniele ORCID logoORCID: https://orcid.org/0000-0002-7591-9519;
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