The aim of the paper is to give a preliminary interpretation to the high damage levels (IX-X MCS) caused by the L’Aquila earthquake, even though its magnitude was moderate (ML=5.8) and the proper historical seismic classification of the stricken area. The study thus analyzes the inelastic seismic demand of a SDOF (Single Degree Of Freedom) system designed according to new Italian Seismic Provisions (NTC08) against four nearfault accelerograms recorded during the main shock event of the L’Aquila earthquake, by varying SDOF mechanical parameters. Such systems have been designed according to the code for a 475- year return period event as the L’Aquila earthquake can be considered according to historical recurrence analysis in order to assess the seismic performances. Park & Ang and low-cycle fatigue indices have been used to estimate seismic effects on built environment. The results highlight the high seismic inelastic demand, well beyond the limit specified in NTC08, both for the design of new buildings and for seismic upgrading of existing ones.
Non-linear response spectra of the near-fault L’aquila event / B., Palazzo; M., DE IULIIS; Castaldo, Paolo. - ELETTRONICO. - (2010), pp. 1-8. (Intervento presentato al convegno 14th ECEE Conference – European Conference on Earthquake Engineering tenutosi a Skopje, Ohrid nel August 30 – September 3, 2010).
Non-linear response spectra of the near-fault L’aquila event
CASTALDO, PAOLO
2010
Abstract
The aim of the paper is to give a preliminary interpretation to the high damage levels (IX-X MCS) caused by the L’Aquila earthquake, even though its magnitude was moderate (ML=5.8) and the proper historical seismic classification of the stricken area. The study thus analyzes the inelastic seismic demand of a SDOF (Single Degree Of Freedom) system designed according to new Italian Seismic Provisions (NTC08) against four nearfault accelerograms recorded during the main shock event of the L’Aquila earthquake, by varying SDOF mechanical parameters. Such systems have been designed according to the code for a 475- year return period event as the L’Aquila earthquake can be considered according to historical recurrence analysis in order to assess the seismic performances. Park & Ang and low-cycle fatigue indices have been used to estimate seismic effects on built environment. The results highlight the high seismic inelastic demand, well beyond the limit specified in NTC08, both for the design of new buildings and for seismic upgrading of existing ones.Pubblicazioni consigliate
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https://hdl.handle.net/11583/2664985
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