PGA and structural dynamics input motion at a given site |
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Authors: | Email author" target="_blank">Fabio?CasciatiEmail author Sara?Casciati Alberto?Marcellini |
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Institution: | 1. Dept. of Structural Mechanics, University of Pavia, 27100 Pavia, Italy 2. CNR-IDPA, 20133 Milano, Italy |
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Abstract: | The computation of the representative ground motions, to be used as input for the dynamic analyses of a structure at a particular
site, can be approached by several methods. The choice of the approach depends on two factors : the data available and the
type of problem to be solved. This paper reports the experience of the authors in approaching a specific case study: the Southern
Memnon Colossus, located in Luxor, Egypt. The results are of interest when the hazard analysis estimation in developing countries
and the safeguard of cultural heritage are concerned. Monuments have to be treated as important structures, due to their historical
and economical value. Hence, standard procedures of probabilistic seismic hazard analysis for the seismic classification of
common buildings have to be disregarded. On the other hand, the consequences of the collapse of a monument are not comparable
to those related to structures such as nuclear power plants and large dams, for which the deterministic seismic hazard analysis
provides a straightforward framework for evaluation of the worst case ground motions. An “intermediate” approach, which requires
a lower amount of input data with respect to the deterministic one, is adopted. Its stochastic component can capture significant
characteristics of earthquakes, primarily the frequency contents which depend on the magnitude (often referred to as the earthquake
scaling law).
Supported by: European Union-ICA3-1999-00006 |
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Keywords: | accelerograms hazard analysis site effects structural dynamics |
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