References of "Rossi, Barbara"
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See detailLife-cycle carbon footprint of a residential steel framed building in different climates
Rossi, Barbara ULg; Marique, Anne-Françoise ULg; Reiter, Sigrid ULg

in World Sustainable Building Conference: SB11, Helsinki 18-21 October 2011 (2011, October 19)

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See detailEffects of the roll forming process on the mechanical properties of thin-walled sections made of non linear metallic materials
Rossi, Barbara ULg; Boman, Romain ULg; Degée, Hervé ULg

in Proceedings of the 6th International Conference on Thin Walled Structures: ICTWS2011, Timisoara 5-7 September 2011 (2011, September 05)

It is well known that the cold-forming process is likely to significantly enhance the mechanical properties of the profile by strain hardening leading to increased resistance compared to a resistance ... [more ▼]

It is well known that the cold-forming process is likely to significantly enhance the mechanical properties of the profile by strain hardening leading to increased resistance compared to a resistance assessment based on nominal properties. It is thus necessary to accurately determine the mechanical properties after the cold process of fabrication. The knowledge on these enhanced properties is rather good for profiles made of traditional construction steel (carbon steel with yield strength between 200 and 400 MPa) characterized by an elasticplastic behaviour. However less information is available for profiles made of materials exhibiting a non linear stress-strain relationship. In this context, the paper presents a parametric study on roll-profiled channel sections. For that purpose, the finite element code METAFOR developed at the LTAS division of the University of Liège is used to simulate the forming process of profiles made of high strength steel and of stainless steel. In the simulations, different values of the radius to thickness ratio of the corners are considered. The results of the numerical simulations are expressed in terms of resulting proof strength in the corners versus the radius to thickness ratio for the different materials. They are finally compared to existing predictive formulations. Additional considerations are also given on the forming process itself (i.e. on the configuration of the rolls or on the springback). [less ▲]

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See detailExtension of the Direct strength method to hot-rolled profiles cross-sections
Rossi, Barbara ULg

Conference (2011, September)

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See detailExtension of the Direct strength method to hot-rolled profiles cross-sections
Li, Yongzhen ULg; Rossi, Barbara ULg; Jaspart, Jean-Pierre ULg

in 6th European Conference on Steel and Composite Structures : Eurosteel 2011, Budapest 30 October - 2 September 2011 (2011, September)

Current metallic structural design codes use the concept of section classification for determining the section capacity of hot-rolled profiles. In this system, there exists a discontinuity between the ... [more ▼]

Current metallic structural design codes use the concept of section classification for determining the section capacity of hot-rolled profiles. In this system, there exists a discontinuity between the classes 2 and 3, while for the class 4, the effective width method (EWM) must be used to account for local buckling phenomenon. In order to overcome the complicate and time consuming EWM for evaluating the strength, the alternative Direct Strength Method (DSM) approach, developed only for cold-formed thin-walled members, has gained importance over the last few years. The DSM is premised on the assumption that the strength can be predicted from the yield strength to the elastic critical load ratio in conjunction with a strength curve. The DSM has been advanced for calculating the strength of compression members over the past decades and in this paper, the extension of DSM to hot-rolled profiles cross-sections is investigated. Firstly, the methods for calculating the cross-section resistance such as EWM, DSM, and the recent Continuous Strength Method (CSM) are reviewed; a short comparison is made and their domains of applicability are commented. Secondly, a numerical model carried out in the frame of this research is described. The model was built in ABAQUS and verified against test results of the “Semi-comp: Plastic member capacity of semi-compact steel sections - a more economic design” project, which was carried out earlier with the objective of improving the utilization of plasticity in rolled and welded sections with medium cross-section slenderness. On the basis of these premises, the final goal of the project is detailed: to derive a new formulation that would cover the whole field of section slenderness (present class 1 to class 4), which can be seen as an extension of the so-called DSM approach. [less ▲]

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See detailTechniques d’analyse de cycle de vie appliquées aux structures
Rossi, Barbara ULg; Courard, Luc ULg

in Waldmann, Danièle; Lecomte, André; Courard, Luc (Eds.) Compte rendu des Journées scientifiques du Regroupement francophone pour la recherche et la formation sur le béton: RF2B, Luxembourg 7-8 juillet 2011 (2011, July)

L’analyse de cycle de vie (ACV) est de plus en plus utilisée afin d’évaluer les impacts environnementaux liés à la production, la mise en œuvre, l’utilisation, la mise en décharge ou le recyclage de ... [more ▼]

L’analyse de cycle de vie (ACV) est de plus en plus utilisée afin d’évaluer les impacts environnementaux liés à la production, la mise en œuvre, l’utilisation, la mise en décharge ou le recyclage de produits, en incluant les matières premières à partir desquelles ces produits sont faits. L’intérêt de l’ACV a déjà été démontré dans le domaine de la construction et plus particulièrement pour les bâtiments. Les méthodologies actuelles sont, par ailleurs, assez bien définies, notamment par l’intermédiaire des normes ISO. Cependant, même si ses applications sont nombreuses dans ce domaine, elle souffre encore de lacunes. Cet article donne un aperçu bref des ACV réalisées dans le domaine des bâtiments et décrit, par ailleurs, les résultats d’une ACV appliquée à une structure portante dans le cas où cette structure est faite de deux matériaux différents : l’acier et le béton. [less ▲]

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See detailField of application of high strength steel circular tubes for steel and composite columns from an economic point of view
Hoang, Van Long ULg; Demonceau, Jean-François ULg; Ly Dong Phuong, Lam et al

in Journal of Constructional Steel Research (2011), 67(6), 1001-1021

This paper presents the results of a global comparison between high strength steel and normal steel circular tube used to build steel and composite columns submitted to static loading, in regards with the ... [more ▼]

This paper presents the results of a global comparison between high strength steel and normal steel circular tube used to build steel and composite columns submitted to static loading, in regards with the economic aspects. The comparison is based on an optimum design taking into account the strength, stability and stiffness conditions of Eurocode 3 and 4. The automatic implementation of the algorithms allows achieving a high amount of case studies, covering the realistic possibilities of build columns. The investigations are realized on simple columns, columns included in braced or un-braced frames and whole frames. The field of application of high strength steel (vs normal steel), regarding the total cost of the member, is provided in a chart clearly indicating where the use of high strength steel becomes economic. [less ▲]

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See detailUse of high strength steel tubular columns in structures: economic study
Hoang, Van Long ULg; Demonceau, Jean-François ULg; Rossi, Barbara ULg

in Progress in steel and composite structures : ICMS2011, Wroclaw 15-17 June 2011 (2011, June)

In many structures, the use of high strength steel (HSS), i.e. with an elastic strength higher than 460MPa, offers an economical benefit in comparison with normal steel (NS). The reason relies mainly on ... [more ▼]

In many structures, the use of high strength steel (HSS), i.e. with an elastic strength higher than 460MPa, offers an economical benefit in comparison with normal steel (NS). The reason relies mainly on the fact that the cost increases slower than the strength. Moreover, structures using HSS are usually lighter than the ones made of NS leading to a reduction of the costs related to the transportation, fabrication and painting. However, as the stiffness of HSS structures is smaller than the one of NS structures, the second-order effects and, consequently, the serviceability requirements considerably limit the advantages of the use of HSS. The interrelation between the advantages and the drawbacks of HSS leads to the complicate question of knowing whether there is an economic interest of using HSS instead of NS for structural members. This question has not yet been adequately considered in the literature. The present work aims at investigating building frames with steel and/or composite columns (made of circular steel tubes) with the objective of defining the domains where the use of HSS is economically interesting. Two topics will be addressed: (1) to provide a general view of the economic benefit of the use of HSS; (2) to establish the basis for choosing the material (HSS or NS) for framed structures at the pre-design stage. [less ▲]

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See detailGeometrically non linear analysis of steel Storage racks submitted to earthquake loading
Degée, Hervé ULg; Rossi, Barbara ULg; Jehin, Denis

in International Journal of Structural Stability & Dynamics (2011), 11(5), 949-967

Steel storage racks are light and flexible structures. When submitted to earthquake loading, they can exhibit very large transverse displacements and are thus prone to significant consequences of second ... [more ▼]

Steel storage racks are light and flexible structures. When submitted to earthquake loading, they can exhibit very large transverse displacements and are thus prone to significant consequences of second-order geometrical effects. In the context of the drafting of European recommendations for the design of steel pallet racks for their seismic resistance, this paper presents a parameter study comparing the various methods commonly used in practice for analyzing the seismic structural behavior of racks (i.e. "modal response spectrum analysis" and "lateral force method analysis") as well as the different ways to account for geometrically nonlinear effects in these conventional methods of analysis in the case of structures designed for low ductility. [less ▲]

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See detailSustainability of steel and steel structures
Rossi, Barbara ULg

Conference (2011, March)

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See detailSustainability of steel and steel structures
Rossi, Barbara ULg

Learning material (2011)

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See detailLife-cycle impacts assessment of steel, composite, concrete and wooden columns
Rossi, Barbara ULg; Lukic, Ivan; Iqbal, Naveed et al

in Final International Conference of COST Action C25 - Sustainability of Constructions : Towards a better built environment: Innsbruck 3-5 February 2011 (2011, February)

This paper presents a comparative study showing the environmental profile of structural members used in the construction domain. The functional unit is a column that is realistic in terms of dimensions ... [more ▼]

This paper presents a comparative study showing the environmental profile of structural members used in the construction domain. The functional unit is a column that is realistic in terms of dimensions and load bearing capacity, made of steel or high strength steel sections, steel and concrete (composite), reinforced concrete, solid wood and glue-laminated wood. The design of the columns is made following the Eurocodes. Several environmental impacts are assessed, such as the global warming potential and energy consumption while also focusing on the acidification potential. The results are presented in the forms of bar charts for each considered column. For steel and concrete, depending on the source of information, the inven-tory can vary substantially e.g. the CO and CH4 emissions. Several sources of information are provided and used to perform a brief sensitivity analysis. The influence of the recycling of steel taking into account the IISI methodology will also be discussed. [less ▲]

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See detailLife-cycle impacts assessment of steel, composite, concrete and wooden columns
Rossi, Barbara ULg

Conference (2011, February)

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See detailComparative study of the life cycle profile of residential masonry and steel framed buildings in Belgium
Massetto de Aquino, Ligia; Reiter, Sigrid ULg; Rossi, Barbara ULg

in Final International Conference of COST Action C25 - Sustainability of Constructions : Towards a better built environment: Innsbruck 3-5 February 2011 (2011, February)

This study presents the life cycle assessment (LCA) of two buildings similar in dimensions, orientations, climate and purpose but designed for Belgium using two different construction systems: traditional ... [more ▼]

This study presents the life cycle assessment (LCA) of two buildings similar in dimensions, orientations, climate and purpose but designed for Belgium using two different construction systems: traditional masonry made of concrete blocks, insulation and ceramic bricks and light gauge steel framing as the load carrying component. The comparison between the LCA focuses on the CO2 emission equivalent for each building’s life cycle. After a short sensitivity analysis, the results of the assessment are compared against each other and the conclusions are presented. [less ▲]

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See detailLife cycle inventory of stainless steel - A review of challenges, methods and applications
Rossi, Barbara ULg

in Bragança, Luis; Koukkari, Heli; Blok, Rijk (Eds.) et al Integrated approach towards sustainable constructions (2011)

This chapter presents life cycle inventories (LCI) of stainless steel products (cold-rolled coils) with a focus on the challenges associated to the use of this material in the construction domain: roofs ... [more ▼]

This chapter presents life cycle inventories (LCI) of stainless steel products (cold-rolled coils) with a focus on the challenges associated to the use of this material in the construction domain: roofs, façades, technical equipment, structural components. After an introduction describing recent applications of stainless steel in the construction domain, an overview of the challenges related to the use of this material is presented. In this section, a special attention paid to the Leadership in Environmental and Engineering Design (LEED) developed by the US Green Building Council (USGBC), that was one of the world’s first green building rating system (1990) and most widely used internationally. The most recognized European environmental assessment methods will also be mentioned. Several grades will then be described with regard to their mechanical (resistance and ductility) and physical properties (solar reflectance, thermal emittance) as well as surface finishes available for the construction domain. Afterwards, three grades in the form of cold-rolled coils (grades 304, 316 and 430) will be compared in terms of life-cycle inventory from cradle to gate including the end-of-life treatment. Indeed, since stainless steel is recycled to more than 90% at the end of its life and recyclable and indefinite number of times, the method that will be taken into account is referred as “allocation for scrap inputs and outputs using the closed material loop recycling methodology”. A short description of the reference method will also be provided. Last, depending on the recycling rate and thus net recycling content, several impacts such as the energy demand and CO2 emissions will be compared. The influence of the end-of-life credit method will be underlined and discussed. [less ▲]

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