References of "Tondini, Nicola"
     in
Bookmark and Share    
Full Text
Peer Reviewed
See detailFIRE TESTING OF HIGH-STRENGTH STEEL CIRCULAR COLUMNS
Tondini, Nicola; Van Long, Hoang; Demonceau, Jean-François ULg et al

Conference (2013, September 30)

This paper presents an experimental-numerical study on the behaviour of High Strength Steel (HSS) columns at elevated temperature, both on Circular Hollow Sections (CHS) and on a Concrete Filled Tube (CFT ... [more ▼]

This paper presents an experimental-numerical study on the behaviour of High Strength Steel (HSS) columns at elevated temperature, both on Circular Hollow Sections (CHS) and on a Concrete Filled Tube (CFT). The measured yield strength of the circular sections was in the order of 820 MPa. In detail, three HSS CHS and a HSS CFT were tested under the standard ISO fire with constant eccentric compression load. The evolution of temperature and defor-mation patterns were measured by means of a comprehensive instrumentation made of ther-mocouples and displacement transducers. Numerical analyses were performed and compared with experimental data by employing stress-strain relationships of carbon steel at elevated temperatures provided by EN1993-1-2 associated with two different sets of reduction factors: i) those provided by EN1993-1-2 valid up to S460 steel grades; and ii) those proposed in the literature and based on tests on HSS. [less ▲]

Detailed reference viewed: 5 (1 ULg)
Full Text
Peer Reviewed
See detailIMPLEMENTATION OF A WEAK COUPLING APPROACH BETWEEN A CFD AND AN FE SOFTWARE FOR FIRES IN COMPARTMENT
Tondini, Nicola; Franssen, Jean-Marc ULg

in Idelsohn, S; Papadrakakis, M; Schrefler, B (Eds.) V International Conference on Computational Methods for Coupled Problems in Science and Engineering (2013, June 17)

The paper presents the assumptions and the issues that arise when developing an integrated modelling methodology between a Computational Fluid Dynamics (CFD) software applied to compartment fires and a ... [more ▼]

The paper presents the assumptions and the issues that arise when developing an integrated modelling methodology between a Computational Fluid Dynamics (CFD) software applied to compartment fires and a Finite Element (FE) software applied to structural systems subjected to fire. In particular, a weak coupling approach used to simulate a fire exposed structure by modelling the fire development in the compartment, the heat penetration in the structure and the mechanical response is described. The advantages and the disadvantages of such a technique are highlighted compared to a full coupling that conversely takes into account all mutual interactions. The favourable aspect of computing the thermal response of the structure in the FE model in order to avoid modelling the structure in the CFD model is underlined, namely a sensitive reduction of computational demand. Finally, the study is enriched by an application of this methodology that concerns the simulation of a pool fire in an open compartment the results of which are compared with those obtained by employing the simplified Hasemi model included in the Eurocodes. [less ▲]

Detailed reference viewed: 7 (1 ULg)
Full Text
Peer Reviewed
See detailExperimental assessment of the effect of the real flame emissivity for steel elements engulfed into fire
Tondini, Nicola; Vassart, Olivier; Franssen, Jean-Marc ULg

in Babrauska, Vytenis; Grayson, Stephen; Hirschler, Marcelo (Eds.) et al Proceedings of the Fire and Materials 2013 Conference (2013)

This paper presents the results of an experimental campaign performed to assess the effect of the flame emissivity for steel members engulfed into fire. In detail, two sizes of circular steel tubes were ... [more ▼]

This paper presents the results of an experimental campaign performed to assess the effect of the flame emissivity for steel members engulfed into fire. In detail, two sizes of circular steel tubes were engulfed into pool fires of two different diameters. Two fuels were used and for both fuels tests without column (used as comparison with existing localised fire models) and with column were performed. The temperature of the column and of the flames were measured at different heights. The width of the flame was also measured and used to calculate the emissivity of the flame the value of which was employed in numerical simulations in order to predict the evolution of the temperature of the steel column. Comparison with numerical analyses where the recommended values of the Eurocode were used is also shown. [less ▲]

Detailed reference viewed: 27 (5 ULg)
Full Text
Peer Reviewed
See detailExperimental investigation on ferritic stainless steel columns in fire
Tondini, Nicola; Rossi, Barbara; Franssen, Jean-Marc ULg

in Fire Safety Journal (2013), 62

This paper presents the performance of EN 1.4003 ferritic stainless steel hollow section columns when exposed to fire loading. Experimental analysis of the behaviour of ferritic stainless steel structural ... [more ▼]

This paper presents the performance of EN 1.4003 ferritic stainless steel hollow section columns when exposed to fire loading. Experimental analysis of the behaviour of ferritic stainless steel structural members in fire represents a novelty. In detail, three column tests were carried out in the framework of the RFCS project named Structural Applications of Ferritic Stainless Steels (SAFSS, RFSR-CT-2010-00026). Tubular thin-walled members were considered in this study because structural applications of ferritic stainless steels generally incorporate such profiles. Three columns were tested: two square hollow sections (SHS) and a rectangular hollow section (RHS) of different length. Fire loading was applied under a constant concentrically compressive load. Identical column tests at room temperature are also reported. [less ▲]

Detailed reference viewed: 26 (2 ULg)
Full Text
Peer Reviewed
See detailExperimental and numerical investigation of high-strength steel circular columns subjected to fire
Tondini, Nicola; Hoang, Van Long ULg; Demonceau, Jean-François ULg et al

in Journal of Constructional Steel Research (2013), 80

This paper presents an experimental–numerical study on the behaviour of High Strength Steel (HSS) columns at elevated temperature, both on Circular Hollow Sections (CHS) and on a Concrete Filled Tube (CFT ... [more ▼]

This paper presents an experimental–numerical study on the behaviour of High Strength Steel (HSS) columns at elevated temperature, both on Circular Hollow Sections (CHS) and on a Concrete Filled Tube (CFT). The measured yield strength of the circular sections was in the order of 820 MPa. In detail, three HSS CHS and a HSS CFT were tested under the standard ISO fire with constant eccentric compression applied load. The evolution of temperature and deformation patterns were measured by means of a comprehensive instrumentation made of thermocouples and displacement transducers. Numerical analyses were performed and compared with experimental data by employing stress–strain relationships of carbon steel at elevated temperatures provided by the Eurocodes associated to two different sets of reduction factors: i) those provided by the Eurocodes valid up to S460 steel grades; and ii) those proposed in the literature and based on tests on HSS. [less ▲]

Detailed reference viewed: 69 (9 ULg)
Full Text
Peer Reviewed
See detailDevelopment of an interface between CFD and FE software
Tondini, Nicola; Vassart, Olivier; Franssen, Jean-Marc ULg

in Fontana, Mario; Frangi, Andrea; Knobloch, Markus (Eds.) Proceedings of the 7th International Conference on Structures in Fire (2012, June 06)

The paper presents the assumptions and the issues that arise when developing an integrated modelling methodology between a Computational Fluid Dynamics (CFD) software applied to compartment fires and a ... [more ▼]

The paper presents the assumptions and the issues that arise when developing an integrated modelling methodology between a Computational Fluid Dynamics (CFD) software applied to compartment fires and a Finite Element (FE) software applied to structural systems. In particular, a weak coupling approach used to simulate a fire exposed structure by modelling the fire development in the compartment, the heat penetration in the structure and the mechanical response is described. The advantages and the disadvantages of such a technique are highlighted compared to a full coupling that conversely takes into account all mutual interactions. The favourable aspect of computing the thermal response of the structure in the FE model in order to avoid modelling the structure in the CFD model is underlined, namely a sensitive reduction of computational demand. Finally, a practical application is presented. [less ▲]

Detailed reference viewed: 78 (2 ULg)
Full Text
Peer Reviewed
See detailDevelopment of an interface between a CFD software and a FE software for compartment fires
Tondini, Nicola; Franssen, Jean-Marc ULg

in Costruzioni Metalliche (2012), 3

The article presents the assumptions and the issues that arise when developing an integrated modelling methodology between a Computational Fluid Dynamics (CFD) software applied to compartment fires and a ... [more ▼]

The article presents the assumptions and the issues that arise when developing an integrated modelling methodology between a Computational Fluid Dynamics (CFD) software applied to compartment fires and a Finite Element (FE) software applied to structural systems. In particular, a weak coupling methodology used to simulate a fire exposed structure by modelling the fire development in the compartment, the heat penetration in the structure and the mechanical response is described. A practical application is also shown. [less ▲]

Detailed reference viewed: 39 (1 ULg)
Full Text
See detailDevelopment of an FDS-SAFIR interface
Tondini, Nicola; Franssen, Jean-Marc ULg

Scientific conference (2011, November 15)

A weak coupling strategy from CFD models to F.E. models is being developed on the base of an interface file. The software FDS and SAFIR are used in the applications.

Detailed reference viewed: 58 (4 ULg)
Full Text
Peer Reviewed
See detailDevelopmednt of an integrated modelling methodology for compartment fires by implementing a weak coupling strategy between a CFD and an FE software
Tondini, Nicola; Franssen, Jean-Marc ULg

in De Luca, Antonello (Ed.) XXIII giornate italiane della costruzione in acciaio (2011, October 12)

This article presents the assumptions and the issues that arise when developing an integrated modelling methodology between a Computational Fluid Dynamics (CFD) software applied to compartment fires and a ... [more ▼]

This article presents the assumptions and the issues that arise when developing an integrated modelling methodology between a Computational Fluid Dynamics (CFD) software applied to compartment fires and a finite element (FE) software applied to structural systems. In particular, a weak coupling methodology use to simulate a fire exposed structure by modelling the fire development in the compartment, the heat penetration in the structure and the mechanical response is described. The advantages and the disadvantages of such a technique are highlighted compared to a full coupling that conversely takes into account all mutual interactions. This methodology is particularly suitable for relatively thin steel structures in large compartments. Moreover, the need of a standardised transfer file in order to get the methodology as flexible as possible in term of versatility is emphasized. [less ▲]

Detailed reference viewed: 31 (2 ULg)
Full Text
See detailFire tests made for the ATTEL RFCS research project
Franssen, Jean-Marc ULg; Dumont, Fabien ULg; Wellens, Eric ULg et al

Conference given outside the academic context (2011)

The ATTEL project (Performance-Based approaches for high strength tubular columns and connections during earthquake and fire loadings) aims at developing performance-based design approaches where the ... [more ▼]

The ATTEL project (Performance-Based approaches for high strength tubular columns and connections during earthquake and fire loadings) aims at developing performance-based design approaches where the capacity design of steel grades up to S690 and S700MC – widely used in seismic engineering to avoid brittle failure and ensure ductile behaviour – will be extended to high strength steel circular hollow section structures to prevent failure and collapse under both earthquake and fire loading. Within this research projects, fire resistance tests have been performed on 4 columns, 4 beam-to-column joints and 3 column bases. The main features and results of these tests are presented here. [less ▲]

Detailed reference viewed: 61 (15 ULg)