Search results for "structural safety"
showing 3 items of 3 documents
Pratica e criticità delle sopraelevazioni nella costruzione storica palermitana. Practice and deficiencies of additional storeys in the construction …
2017
Per secoli lo sviluppo delle città è avvenuto soprattutto attraverso la trasformazione degli edifici esistenti, in particolare per mezzo di estese sopraele-vazioni. Questa pratica ha portato con sé numerose criticità, connesse alla vulne-rabilità sismica delle strutture e alle condizioni d’igiene e benessere degli ambienti interni e dello spazio urbano circostante. Soprattutto le ultime elevazioni sono esemplari della distanza dalle esigenze di sicurezza strutturale e benessere termico dell’utenza contemporanea, distanza che sempre più spesso si imputa agli edifici storici. In un passato non lontano è stata suggerita anche un’estesa demolizione di tali manufatti, operazione che cercava sost…
Historic additional stories in the cultural heritage of Palermo: critical analysis for the purpose of structural and energy improvement
2018
This paper analyses construction features and performances of additional storeys in historic buildings. The recurring characteristics of these historic accretions are investigated by focusing on the cultural heritage of Palermo, where the practice of extending buildings by raising new levels was widespread both in monumental and vernacular architecture, in public and private constructions. The performance deficiencies of additional storeys are examined in terms of structural safety, thermal comfort and building energy demand. On this basis, the utility of mapping these structures, their morphology and their location in the urban fabric is discussed.
Structural Safety Assessment of Marine Operations From a Long-Term Perspective: A Case Study of Offshore Wind Turbine Blade Installation
2019
Abstract A marine operation is a complex non-routine activity of limited duration carried out in offshore environment. Due to safety reasons, these operations are normally performed within specific sea state limits, which are derived from numerical modelling and analysis of hazardous events. In view of the uncertainties in the assessment of structural responses under stochastic environmental conditions, these limiting curves correspond to a target structural failure probability recommended in offshore standards (for example, 10−4 per operation as specified by DNV-GL). However, one of the main limitations is that these curves do not reflect site-specific safety assessment. The current paper …