Introducing new design spectra derived from Italian recorded ground motions 1972 to 2017 |
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| Authors: | G Michele Calvi Daniela Rodrigues Vitor Silva |
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| Affiliation: | 1. Eucentre Foundation and IUSS, Pavia, Italy;2. Eucentre Foundation, Pavia, Italy;3. GEM Foundation, Pavia, Italy |
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| Abstract: | The shape of design spectra, traditionally based on regions characterized by constant displacement, constant velocity, and constant acceleration, has been discussed from a conceptual point of view by Calvi (2018). In the same study, a formulation for the definition of the design spectra relying on four parameters was proposed. Predictive models are proposed herein to calculate these four parameters, conditional on magnitude and distance. These models were developed using a large number of recorded ground motions in Italy, and they allow defining combined spectral acceleration versus spectral displacement plots. Such design spectra are shown to reasonably interpolate the experimental data, resulting in acceleration and displacement demand that approximate the response spectra resulting from +1σ results obtained from recorded ground motions. While it is recognized that numerous additional parameter should be considered (eg, focal depth and fault distance, site amplification), it is also concluded that this approach to define the seismic demand is promising toward a rationalization of seismic design. A thorough application of the approach developed and preliminary tested in this work may result in a re‐visitation of seismic design approaches and, ultimately, in a more efficient use of the available resources. |
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| Keywords: | design recorded ground motions spectra |
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