12th international conference on ‘Advances in Steel-Concrete Composite Structures’ - ASCCS 2018
URI permanente para esta colección
After the success of ASCCS conference series: Harbin (1985,1988,2006), Fukuoka (1991), Kosice (1994), Innsbruck (1997), Los Angeles (2000), Sydney (2003), Leeds (2009), Singapore (2012), Beijing (2015) the upcoming 12th international conference on ‘Advances in Steel-Concrete Composite Structures’ (ASCCS 2018) will be held by Universitat Politècnica de València, Spain on June 27-29, 2018.
The conference is intended to provide a forum to discuss the recent progress and advances in the research, design and practice of steel-concrete composite as well as hybrid structures.
Futher information in: http://asccs2018.webs.upv.es/
Examinar
Examinando 12th international conference on ‘Advances in Steel-Concrete Composite Structures’ - ASCCS 2018 por Patrocinador "Generalitat Valenciana"
Mostrando 1 - 3 de 3
Resultados por página
Opciones de ordenación
- PublicaciónAnalysis of concrete-filled steel tubular columns after fire exposure(Editorial Universitat Politècnica de València, 2018-06-05) Ibáñez, Carmen; Bisby, Luke; Rush, David; Romero García, Manuel Luis; Hospitaler, Antonio; Departamento de Mecánica de los Medios Continuos y Teoría de Estructuras; Escuela Técnica Superior de Ingeniería Industrial; Instituto Universitario de Investigación de Ciencia y Tecnología del Hormigón; Generalitat Valenciana[EN] Concrete filled steel tubular (CFST) columns have a high probability to resist high temperatures compared to steel structures, whose evaluation after a fire is limited by the resulting deformation. A better understanding of the behaviour of CFST columns after a fire, affected by the maximum temperature achieved by the concrete infill, is required to properly estimate their residual strength and stiffness in order to adopt a reasonable strategy with minimum post-fire repair. In this paper, a fiber beam model for the simulation of the post-fire response of slender concrete-filled steel tubular (CFST) columns is presented. First, the model is validated against experimental results and subsequently it is employed to analyse the post-fire response of circular CFST columns. The variation of the residual strength with the load level for realistic fire resistance times is numerically studied. Actually, in a building, the columns support load even while a fire is being extinguished, so it is important to take into account this loading condition when predicting the post-fire behaviour. Therefore, in this research, the complete analysis comprises three stages: heating, cooling and post-fire under sustained load conditions. The model considers realistic features typical from the fire response of CFST columns, such as the existence of a gap conductance at the steel-concrete interface or the sliding and separation between the steel tube and the concrete.
- PublicaciónConcrete-filled round-ended steel tubular stub columns under concentric and eccentric loads(Editorial Universitat Politècnica de València, 2018-06-05) Piquer Vicent, Ana; Hernández-Figueirido, David; Ibáñez Usach, Carmen; Departamento de Ingeniería de la Construcción y de Proyectos de Ingeniería Civil; Escuela Técnica Superior de Ingeniería Industrial; Instituto Universitario de Investigación de Ciencia y Tecnología del Hormigón; Universitat Jaume I; Generalitat Valenciana[EN] In the past, many works to study the mechanical behaviour of concrete filled steel tubular (CFST) stub columns have been conducted. Some of the applications of these composite columns oblige to meet higher requirements of ductility and load-bearing capacity. Traditionally, circular and rectangular tubes have been employed but recently new cross-sectional shapes of these composite columns are being designed and investigated with the aim of optimizing their mechanical behaviour. In this line, concrete-filled round-ended steel tubular columns (CFRT) have appeared as an alternative. However, the number of experimental programs to characterize their mechanical response is still scarce. In order to contribute to the test results database, in this paper an experimental study of 9 concrete-filled round-ended steel tubular stub columns is presented. All the specimens were designed with the same cross-sectional round-ended shape and have the same dimensions. In this program, both normal and high-strength concrete were employed as infill. During the tests, the columns were subjected to axial compression loads but under different eccentricities. The influence of eccentricity and concrete strength on the ultimate load bearing capacity of the concrete-filled round-ended steel tubular are discussed. Besides, the combined action of both components in this type of concrete-filled tubes as well as the effect of the concrete infill are studied.
- PublicaciónNumerical investigation on slender concrete-filled steel tubular columns subjected to biaxial bending(Editorial Universitat Politècnica de València, 2018-06-05) Espinós, Ana; Albero, Vicente; Romero, Manuel; Mund, Maximilian; Kleiboemer, Inka; Meyer, Patrick; Schaumann, Peter; Generalitat Valenciana[EN] The behaviour of concrete-filled steel tubular columns under axial compression or combined compression and uniaxial bending has been deeply investigated in past years by means of experimental testing and numerical simulations. However, the behaviour of these columns under biaxial bending has been scarcely investigated, in fact, a very limited number of experimental tests are available for this loading situation. Additionally, the current provisions in EN1994-1-1 for biaxial bending need to be revised, in order to be aligned with the new methods that are being proposed for the new generation of Eurocodes. This paper presents the outcome of a numerical investigation on the load-bearing capacity of slender concrete-filled steel tubular columns subjected to biaxial bending. The focus is on creating and validating a numerical model for room temperature that can predict the behaviour of this type of columns under biaxial bending, which may be used for evaluating the current design guidelines in EN1994-1-1. The numerical model is validated by comparison against experimental tests from the literature, proving that it predicts the ultimate load of slender columns with good accuracy. Different eccentricities about the minor and major axis and different moment ratios are considered, so that this investigation contains cases for both uniaxial and biaxial bending. With the help of this numerical model, the experimental results are extended to generate more cases, in order to assess the accuracy of the current provisions in EN1994-1-1 for concrete-filled steel tubular columns subjected to biaxial bending.