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Seismic input in the structural design: Considerations and application to the Italian territory

TitleSeismic input in the structural design: Considerations and application to the Italian territory
Publication TypeArticolo su Rivista peer-reviewed
Year of Publication2015
AuthorsClemente, Paolo, Bongiovanni Giovanni, Buffarini Giacomo, and Saitta F.
JournalInternational Journal of Safety and Security Engineering
KeywordsConcrete buildings, Design, earthquake event, Economical evaluation, Geometrical characteristics, Hazards, Italy, Local seismic response, Reinforced concrete, Retrofit of existing buildings, safety, Safety of structures, Seismic design, seismic hazard, Seismic hazards, seismic method, Seismic response, Seismology, Structural analysis, Structural design, Structural modeling, Structural safety, territory

Some recent seismic events pointed out the necessity to revise our way of seismic analysis of structures. But what do structural engineers need to design anti-seismic structures? The first step is the analysis of the seismic input, defined by means of the basic hazard analysis and of the local seismic response. Once the description of the seismic hazard is known, the choice of the protection degree should be made on the basis of economical evaluations. Furthermore, the uncertainties about the local seismic response could be very important. The second step is the structural modeling and analysis, whose suitability depends on how good is the description of the material behavior, geometrical characteristics of the structure, and its behavior both in elastic and inelastic ranges. This is accounted for by means of the behavior factor, whose definition and use are quite delicate and often not necessary, especially in lowto medium-seismicity areas, as demonstrated by means of a comprehensive numerical analysis on the construction costs of reinforced concrete buildings. In this article, some important issues are discussed and some proposals are given to improve the technical codes and hence the safety of structures against earthquakes. The seismic input to be used in the retrofit of existing buildings is also discussed. © 2015 WIT Press.


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