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A platform for research: civil engineering, architecture and urbanism
Structural behaviour of cold-formed steel beams subjected to fire
Dissertação de Mestrado em Construção Metálica e Mista apresentada à Faculdade de Ciências e Tecnologia da Universidade de Coimbra. ; The cold-formed profiles have got recently a significant role in the civil engineering industry. Main reason for this is the fact that these profiles offer numerous advantages in comparison with hot-rolled sections. Cold-forming manufacturing process nowadays makes it possible to have practically any desired shape and dimension of product which considerably increases design flexibility and moreover allows very attractive, economical and sustainable solutions. Another huge advantage is the possibility of prefabrication and mass production, which combined with a very high load capacity-to-weight ratio these profiles have, may naturally lead to enormous construction speed, easy erection and great structural performance. For these reasons, cold-formed profiles found its practical use in numerous building applications. However, due to the thin shape and thus very slender sections there are several key drawbacks of the cold-formed profiles worth of mentioning; one of them is definitely their sensitivity and vulnerability to buckling phenomenon with often very low critical loading and short buckling lengths. Another problem with the cold-formed profiles is very poor fire resistance. The main reason for this is because steel has high thermal conductivity while the cross sections are not massive and therefore the section factors are several times higher than an average hot-rolled profile. The buckling phenomena of the thin-gauge profiles, however, have been widely examined and the design procedures in which these problems are taken into account are now completely known and can be found in almost every design code. On the other hand, studies on fire performance of cold-formed steel members are still fairly rare and the knowledge in this particular area is rather obscure. The aim of this study is thus to help and stimulate the development of a new knowledge in this particular area of fire ...
Structural behaviour of cold-formed steel beams subjected to fire
Dissertação de Mestrado em Construção Metálica e Mista apresentada à Faculdade de Ciências e Tecnologia da Universidade de Coimbra. ; The cold-formed profiles have got recently a significant role in the civil engineering industry. Main reason for this is the fact that these profiles offer numerous advantages in comparison with hot-rolled sections. Cold-forming manufacturing process nowadays makes it possible to have practically any desired shape and dimension of product which considerably increases design flexibility and moreover allows very attractive, economical and sustainable solutions. Another huge advantage is the possibility of prefabrication and mass production, which combined with a very high load capacity-to-weight ratio these profiles have, may naturally lead to enormous construction speed, easy erection and great structural performance. For these reasons, cold-formed profiles found its practical use in numerous building applications. However, due to the thin shape and thus very slender sections there are several key drawbacks of the cold-formed profiles worth of mentioning; one of them is definitely their sensitivity and vulnerability to buckling phenomenon with often very low critical loading and short buckling lengths. Another problem with the cold-formed profiles is very poor fire resistance. The main reason for this is because steel has high thermal conductivity while the cross sections are not massive and therefore the section factors are several times higher than an average hot-rolled profile. The buckling phenomena of the thin-gauge profiles, however, have been widely examined and the design procedures in which these problems are taken into account are now completely known and can be found in almost every design code. On the other hand, studies on fire performance of cold-formed steel members are still fairly rare and the knowledge in this particular area is rather obscure. The aim of this study is thus to help and stimulate the development of a new knowledge in this particular area of fire ...
Structural behaviour of cold-formed steel beams subjected to fire
2016-02-05
201660717
Theses
Electronic Resource
English
fire , analytical , fire protection , imperfection , numerical , purlin , buckling , cold-formed profile
DDC:
690
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