1,721,031 research outputs found
A PROBABILISTIC APPROACH FOR SEISMIC ASSESSMENT OF R.C. STRUCTURES: APPLICATION TO HIGHWAY BRIDGES
No full text
Affidabilità sismica dei sistemi di distribuzione dell’acqua potabile in ambito urbano: metodologia di calcolo ed applicazione
No full textStructural safety evaluation of electric power supply at urban level earthquake engineering and structural dynamics
No full text
Performance of Lifelines During the 2002 Molise, Italy, Earthquake
No full textThe Molise earthquake affected a wide rural area with sparse houses, villages and towns. The paper investigates the response of water, electric power, telecommunications, natural gas, rail and motorway systems. Despite the amount of damage to buildings, lifeline systems reported only minor damage. The damage was light not only because the event caused relatively moderate ground motion in the affected area but also because the main lifelines do not cross the epicentral region and were in a fair state of maintenance. [DOI: 10.1193/1.1768542
Comportamento sismico di telai rinforzati con FRP
No full textScopo del presente lavoro è la valutazione del comportamento sismico di telai piani, progettati per soli carichi verticali, e poi rinforzati con FRP. Una indagine parametrica su differenti geometrie consente di fornire un’ampia casistica e risultati più generali. Gli schemi considerati sono soggetti al sisma previsto dalla attuale normativa e le risposte ottenute evidenziano la vulnerabilità dei telai e la necessità di realizzare interventi di adeguamento. Il progetto del rinforzo è eseguito seguendo le indicazioni fornite dalle attuali normative italiane ed europee, al fine di rispettare i criteri di gerarchia delle resistenze. Il comportamento sismico è valutato sulla base di analisi statiche e dinamiche sviluppate con modellazioni numeriche. I risultati ottenuti consentono di evidenziare l’influenza del rinforzo sulle modalità di rottura e sulla evoluzione delle plasticizzazioni negli elementi strutturali di ciascuno schem
Seismic safety evaluation of electric power supply at urban level
No full textIn past works the authors set up a refined model for electric power networks under earthquake action. The
procedure models the fragility of components with respect to earthquake action, the complex behaviour
of the stations and the network, the power flow, the network capability to feed the nodes in a damaged
condition, the earthquake damage on the territory, the need to deliver electric power to the municipalities
where most damage has occurred. In later works the method was improved towards design goals:
nonetheless complexity of the network seismic behaviour, a procedure to maximize safety of selected
nodes and minimize economic expenses was constructed, allowing identification of which components,
within each station, had to be upgraded to obtain the maximum economic convenience. The procedure
was programmed within the ASK4ELP computer code (National Information Service for Earthquake
Engineering, University of California, Berkeley, U.S.A., 1999) using late 1990s state-of-the-art knowledge
for both the earthquake and the structural behaviour models.
Recently the method has gone through a thorough updating, partially still in progress. Among the
results, it is now more clear how important is a correct soil geotechnical model to predict the system
response and safety. This paper presents, together with a short summary of the ASK4ELP procedure,
these latest advancements and results and shows, through a real example, the sensitivity of the predicted
safety to soil modelling
- …
