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Featured researches published by A. Espinos.


Acta Polytechnica | 2009

Fire resistance of axially loaded slender concrete filled steel tubular columns. Development of a Three-dimensional numerical model and comparison with eurocode 4

A. Espinos; Antonio Hospitaler; Manuel L. Romero

In recent years, concrete filled tubular (CFT) columns have become popular among designers and structural engineers, due to a series of highly appreciated advantages: high load-bearing capacity, high seismic resistance, attractive appearance, reduced column footing, fast construction technology and high fire resistance without external protection. In a fire, the degradation of the material properties will cause CFT columns to become highly nonlinear and inelastic, which makes it quite difficult to predict their failure. In fact, it is still not possible for analytical methods to predict with enough accuracy the behaviour of columns of this kind when exposed to fire. Numerical models are therefore widely sought. Many numerical simulations have been carried out worldwide, without obtaining satisfactory results. This work proposes a three-dimensional numerical model for studying the actual fire behaviour of columns of this kind. This model was validated by comparing the simulation results with fire resistance tests carried out by other researchers, as well as with the predictions of the Eurocode 4 simplified calculation model.


Journal of Structural Fire Engineering | 2011

Comparison of a Three-Dimensional Numerical Model for Fire Resistance of Axially Loaded Concrete Filled Steel Tubular Columns with Eurocode 4

A. Espinos; Carmen Ibañez; Manuel L. Romero; Antonio Hospitaler

In this paper, the behaviour of slender axially loaded square and circular CFT columns exposed to fire is modelled using the finite element analysis package ABAQUS. A realistic sequentially coupled nonlinear thermal-stress analysis is conducted for a series of columns available in the literature. By means of this model, a comparison between fire resistance simulations results and experimental tests found in literature is made. Similarly, simulations results are compared to the Eurocode 4 simplified calculation model predictions. Comparisons show that whereas Eurocode 4 predictions are very conservative for both circular and square section CFT columns, the results obtained from the developed numerical model are much more realistic.


Journal of Constructional Steel Research | 2011

Fire behavior of axially loaded slender high strength concrete-filled tubular columns

Manuel L. Romero; V. Moliner; A. Espinos; Carmen Ibañez; Antonio Hospitaler


Journal of Constructional Steel Research | 2010

Advanced model for predicting the fire response of concrete filled tubular columns

A. Espinos; Manuel L. Romero; Antonio Hospitaler


Engineering Structures | 2012

Simple calculation model for evaluating the fire resistance of unreinforced concrete filled tubular columns

A. Espinos; Manuel L. Romero; Antonio Hospitaler


Thin-walled Structures | 2011

Fire behaviour of concrete filled elliptical steel columns

A. Espinos; Leroy Gardner; Manuel L. Romero; Antonio Hospitaler


Journal of Constructional Steel Research | 2015

Circular and square slender concrete-filled tubular columns under large eccentricities and fire

A. Espinos; Manuel L. Romero; E. Serra; Antonio Hospitaler


Engineering Structures | 2015

Slender double-tube ultra-high strength concrete-filled tubular columns under ambient temperature and fire

Manuel L. Romero; A. Espinos; J.M. Portolés; Antonio Hospitaler; Carmen Ibañez


Engineering Structures | 2013

Fire design method for bar-reinforced circular and elliptical concrete filled tubular columns

A. Espinos; Manuel L. Romero; Antonio Hospitaler


Engineering Structures | 2016

Proposal of a new method in EN1994-1-2 for the fire design of concrete-filled steel tubular columns

Vicente Albero; A. Espinos; Manuel L. Romero; Antonio Hospitaler; G. Bihina; C. Renaud

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Manuel L. Romero

Polytechnic University of Valencia

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Antonio Hospitaler

Polytechnic University of Valencia

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Vicente Albero

Polytechnic University of Valencia

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Ana M. Pascual

Polytechnic University of Valencia

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E. Serra

Polytechnic University of Valencia

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David Pons

Polytechnic University of Valencia

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Enrique Serra

Polytechnic University of Valencia

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Dennis Lam

University of Bradford

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