21 documents found, page 1 of 3
The role of Parish Councils in georeferencing for emergency planning: approach ...
Rodrigues, Andreia; Santiago, Aldina; Viegas, Domingos Xavier; Zêzere, JoséRural fires are becoming increasingly impactful, not only due to their rapid and intense spread but also because of the growing number of people affected. In Portugal, numerous remote housing clusters are difficult to access and are primarily occupied by seniors or individuals with disabilities. These areas are situated in high-risk wildfire zones. Therefore, it is crucial to document the locations of the indiv...
Evacuation Simulation under Threat of Wildfire—An Overview of Research, Develop...
Beyki, Shahab Mohammad; Santiago, Aldina; Laím, Luís; Craveiro, Hélder D.Wildfires have become a common incident over the past decades, and they have been threatening people’s lives and assets. In the communities close to wildlands or wildland–urban interfaces (WUI), these threats become increasingly serious, and in case of wildfires, people are advised or often have to evacuate the area to save their lives. In order to have a safe and effective evacuation, data on people’s behavior...
Buckling resistance of concrete-filled cold-formed steel (CF-CFS) built-up shor...
Rahnavard, Rohola; Craveiro, Hélder D.; Simões, Rui A.; Laim, Luís; Santiago, AldinaThe steel–concrete composite columns (SCCC) are widely used in the construction sector. The buckling phenomenon of the steel part (especially thin-walled steel) of the SCCC due to compressive loading is the governing characteristic of these columns. The present paper reports an experimental and numerical study on the compressive behavior of innovative concrete-filled (CF) closed built-up cold-formed steel (CFS)...
Equivalent temperature prediction for concrete-filled cold-formed steel (CF-CFS...
Rahnavard, Rohola; Craveiro, Hélder D.; Simões, Rui A.; Santiago, AldinaThis study aims to present an empirical formulation to predict equivalent temperature for steel and concrete components of the innovative concrete-filled cold-formed steel (CF-CFS) built-up column sections. This paper (part A) presents a 2-dimensional (2D) finite element modeling technique to predict temperature evolution through the CF-CFS built-up column sections. Heat transfer analysis was undertaken conside...
Equivalent temperature prediction for concrete-filled cold-formed steel (CF-CFS...
Rahnavard, Rohola; Craveiro, Hélder D.; Simões, Rui A.; Santiago, AldinaInnovative concrete-filled cold-formed steel (CF-CFS) built-up column sections subjected to axial compression and elevated temperatures were previously investigated, assessing their structural fire performance. However, the analytical fire resistance methodology presented in the EN1994-1-2 requires advanced heat transfer analysis to compute the temperature evolution of the steel and concrete components of the c...
Rural fires: causes of human losses in the 2017 fires in Portugal
Rodrigues, Andreia; Santiago, Aldina; Laím, Luís; Viegas, Domingos Xavier; Zêzere, JoséExtreme wildfires are increasingly rising to intense and uncontrolled fires, with dimension and destructive potentials that are greater than what has been seen and dealt with. The hazards posed by these fires increase significantly when they approach the wild–urban interface, with relevant environmental and socio-economic consequences. The 2009 Victorian bushfires and the 2017 Portugal wildfires are powerful re...
Numerical assessment of the behaviour of a fixed offshore platform subjected to...
Rigueiro, Constança; Ribeiro, João; Santiago, AldinaAccording to the International Association of Oil and Gas Producers Report [1] one of the main accidental situations endangering offshore Jacket platforms is a ship collision. Such scenario may induce severe damage level and is therefore addressed in the Norwegian standards, Norsok N-003 and N-004 [2,3], which provide a series of guidelines and methodologies to establish the resistance and ductility of framed s...
Validação do modelo numérico da ligação tipo t-stub sujeita acções de impacto
Ribeiro, João Fernandes; Rigueiro, Constança; Santiago, AldinaEste artigo apresenta a validação de um modelo numérico para o estudo da resposta dinâmica não-linear de T-stub’s, desenvolvido com o software ABAQUS. O T-stub é usado no “método das componentes” para definição da resposta das componentes que mais contribuem para a ductilidade de ligações metálicas aparafusadas, nomeadamente a chapa de extremidade em flexão. O comportamento numérico do T-stub é validado recorre...
Numerical validation of t-stub componente subject to impact load
Ribeiro, João; Rigueiro, Constança; Santiago, AldinaAccidental loadings due to blast or impact may easily cause failure of the elements that are exposed or located in the vicinity of the hazard, leading in some cases, to the progressive collapse of the whole structure; therefore, assessment of the structural over strength is critical for structural engineers to ensure a certain level of security and validate alternative unloading paths. The T-stub model is used ...
Development of an experimental system to apply high rates of loading
Barata, Pedro; Santiago, Aldina; Rodrigues, João Paulo; Rigueiro, ConstançaThe work presented in this paper is part of an ongoing research project at the University of Coimbra IMPACTFIRE PTDC/ECM/110807/2009, which the main focus is the characterization of the behaviour of bolted steel connections subjected to accidental loads, such as impact and fire. Detailed description of the experimental parts developed, designed and fabricated at University of Coimbra, to carry out tests under h...