Nowadays seismic codes require to design structures using ground motion estimates resulting from a probabilistic seismic hazard analysis (PSHA). Focusing on the limits of this approach, in this work a new seismic Performance Based Design (PBD) process is presented. The acceleration response spectrum at a given site is defined by means of the envelope obtained from a large number of realistic ground motions simulated using the Neo Deterministic Seismic Hazard Assessment (NDSHA) method. This response spectrum is defined “Maximum Deterministic Seismic Input” (MDSI) and represents an upper bound level to the spectral accelerations at a given site. The MDSI response spectrum can be developed both at the bedrock (MDSIBD) and at the free surface, thus including the site specific effect (MDSISS). This process supplies realistic synthetic seismograms that allow to run accurate time history analysis. In the proposed Performance Based Design procedure every structure needs to resist to the site specific maximum deterministic (MDSISS) level of seismic input, at least at the collapse prevention level of performance. The importance of the structure (risk category) is taken into account limiting the acceptable structural damage under the MDSISS level of seismic input and not reducing it. The procedure has been just applied, in its essence, to real cases represented by relevant (e.g. schools) buildings of the Trieste province.

A New Design Procedure Based On The Realistic Definition Of Seismic Input

Magrin Andrea;
2016

Abstract

Nowadays seismic codes require to design structures using ground motion estimates resulting from a probabilistic seismic hazard analysis (PSHA). Focusing on the limits of this approach, in this work a new seismic Performance Based Design (PBD) process is presented. The acceleration response spectrum at a given site is defined by means of the envelope obtained from a large number of realistic ground motions simulated using the Neo Deterministic Seismic Hazard Assessment (NDSHA) method. This response spectrum is defined “Maximum Deterministic Seismic Input” (MDSI) and represents an upper bound level to the spectral accelerations at a given site. The MDSI response spectrum can be developed both at the bedrock (MDSIBD) and at the free surface, thus including the site specific effect (MDSISS). This process supplies realistic synthetic seismograms that allow to run accurate time history analysis. In the proposed Performance Based Design procedure every structure needs to resist to the site specific maximum deterministic (MDSISS) level of seismic input, at least at the collapse prevention level of performance. The importance of the structure (risk category) is taken into account limiting the acceptable structural damage under the MDSISS level of seismic input and not reducing it. The procedure has been just applied, in its essence, to real cases represented by relevant (e.g. schools) buildings of the Trieste province.
978-88-218-1141-8
File in questo prodotto:
File Dimensione Formato  
22 - Fasan et al.pdf

non disponibili

Tipologia: Altro materiale allegato
Licenza: Non specificato
Dimensione 650.98 kB
Formato Adobe PDF
650.98 kB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/20.500.14083/5626
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? ND
social impact