References of "Demonceau, Jean-François"
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See detailExperimental and numerical assessment of steel beams under impact loadings
D'Antimo, Marina ULiege; Latour, Massimo; Rizzano, Gianvittorio et al

in Journal of Constructional Steel Research (2019), 158

In order to provide a contribution towards a better understanding of the physical phenomena involved in the design of steel structures under impacts, the present paper focuses on the behaviour of simply ... [more ▼]

In order to provide a contribution towards a better understanding of the physical phenomena involved in the design of steel structures under impacts, the present paper focuses on the behaviour of simply supported beams in drop-weight tests analysing the possibility to model the response numerically through the FE approach. These tests represent an important benchmark to study the behaviour of steel members under impacts and they are usually necessary to provide an accurate modelling of structures under exceptional loading conditions. In the present study, nine experimental tests were conducted on simply supported beams analysing the response of members under the application of increasing weights and dropping heights. Subsequently, in order to evaluate the capabilities of the currently available FE modelling techniques a numerical model was calibrated in Abaqus/CAE verifying its accuracy against the experimental results. Different techniques and material constitutive laws were investigated with the aim to define the most appropriate modelling approach to account for strain rate effects. The numerical results were compared with the experimental ones, demonstrating that, when the strain rate effect is accounted for adequately in the material stress-strain law, the FE modelling is a valid tool to predict the response of steel beams under impact loads. Among the models considered, the Johnson-Cook and Cowper-Symonds constitutive laws provided the best accuracy in terms of peak displacement, peak force and residual displacement. [less ▲]

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See detailAssemblages pré-qualifiés en acier - outils à votre disposition
Demonceau, Jean-François ULiege

Conference (2019, April 04)

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See detailPre-normative design recommendations for seismically qualified steel joints
Demonceau, Jean-François ULiege

Conference (2019, March 27)

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See detailCharacterisation of beam-to-column steel-concrete composite joints beyond current Eurocode provisions
Demonceau, Jean-François ULiege; Ciutina, Adrien

in Structures (2019)

In EN 1994-1-1, design rules are given for the evaluation of the mechanical properties of structural steel-concrete composite joints (rotational stiffness, resistance and ductility). The proposed rules ... [more ▼]

In EN 1994-1-1, design rules are given for the evaluation of the mechanical properties of structural steel-concrete composite joints (rotational stiffness, resistance and ductility). The proposed rules are based on the component method as recommended in EN 1993-1-8 and, in particular, rules for components specific to composite joints are provided in EN 1994-1-1. The main weakness of the rules as presently proposed is that they are only covering cases where composite joints are subjected to shear forces and hogging moments while, in practice, such joints can be subjected to other loading conditions such as sagging bending moments, cyclic loadings, combined bending moments and axial loads, elevated temperatures etc. It is the reason why, during the last decades, researches have been conducted in this field with the objective of improving/extending the rules presently recommended in the Eurocodes. The present paper highlights the main outcomes from part of these researches conducted at Liège University and at University Politehnica Timisoara which could be seen as proposals for future improvements of the beam-to-column provisions in Eurocodes in general and of Eurocode 4 in particular. [less ▲]

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See detailResistance of steel and composite connections under combined axial force and bending including group effects: analytical procedures and comparison with laboratory tests
Demonceau, Jean-François ULiege; Cerfontaine, Frédéric; Jaspart, Jean-Pierre ULiege

in Journal of Constructional Steel Research (2019), 160

The paper presents some different developments performed in the last years at the University of Liège. In particular, complete component-based analytical procedures to predict the resistance of steel ... [more ▼]

The paper presents some different developments performed in the last years at the University of Liège. In particular, complete component-based analytical procedures to predict the resistance of steel bolted connections subjected to combined bending moments and axial forces (M-N interaction) are introduced and commented. These analytical procedures consider so-called “group effects” between successive bolt-rows and cover possible ductile or brittle connection responses. Then they are extended to composite steel-concrete connections. In a second part, the analytical predictions are compared to available test data. The correlation between the experimentally measured resistances and those provided by the analytical procedures may be considered as close. Finally, the recommendations in terms of M-N interactions provided by Eurocode 3 are critically analysed. [less ▲]

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See detailRobustness of steel structures subjected to a column loss scenario
Demonceau, Jean-François ULiege; D'Antimo, Marina ULiege; Jaspart, Jean-Pierre ULiege

in Caspeele, Robby; Taerwe, Luc; Frangopol, Dan (Eds.) Life-Cycle Analysis and Assessment in Civil Engineering: towards an integrated vision (2018, September)

Recent events such as natural catastrophes or terrorism attacks have highlighted the necessity to ensure the structural integrity of buildings under an exceptional event. According to the modern design ... [more ▼]

Recent events such as natural catastrophes or terrorism attacks have highlighted the necessity to ensure the structural integrity of buildings under an exceptional event. According to the modern design codes, the struc-tural integrity of civil engineering structures should be ensured through appropriate measures but, in most cas-es, no precise practical guidelines on how to achieve this goal are provided. The Eurocode dealing with this topic is Eurocode 1, Part 1-7. For the above mentioned reason, this Eurocode is presently under revision with the objective of providing improved general recommendations to ensure an appropriate structural robustness in case exceptional events. In this framework, the robustness of steel and composite steel-concrete building frames is investigated at the University of Liege for many years following the so-called “alternative load path method”. The present paper gives a global overview of the ongoing researches in the field of robustness at the University of Liège. [less ▲]

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See detailBehaviour of an innovative joint solution under impulsive loading
D'Antimo, Marina ULiege; Demonceau, Jean-François ULiege; Jaspart, Jean-Pierre ULiege

in Caspeele, Robby; Taerwe, Luc; Frangopol, Dan (Eds.) Life-Cycle Analysis and Assessment in Civil Engineering: towards an integrated vision (2018, September)

In the framework of the European project “FREEDAM”, an innovative joint solution, able to act as damper for seismic action, is proposed. The proposed joint can withstand high rotational demand associated ... [more ▼]

In the framework of the European project “FREEDAM”, an innovative joint solution, able to act as damper for seismic action, is proposed. The proposed joint can withstand high rotational demand associated to seismic events, without suffering of almost any damage. This is achieved by activating friction components at the joint level, which are acting as fuses, in case of seismic action, which are tailored to keep their mechanical properties constant. The University of Liège is in charge of investigating the structural robustness of buildings equipped with friction dampers and their response under impulsive loading. Consequently, double-sided beam-to-column connections were tested by means of a dropping mass. To track the deformation of some elements during the test, Digital Image Correlation (DIC) have been used. The outcome of the experimental campaign is the characterization of the joint behaviour under impulsive loading; some preliminary results of the experimental campaign are detailed hereinafter. [less ▲]

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See detailCharacterisation of beam-to-column joints beyond current Eurocode provisions
Demonceau, Jean-François ULiege; Ciutina, Adrien

in Albero, Vicente; Espinos, Ana; Ibanez, Carmen (Eds.) et al Proccedings of the 12th International Conference on Advances in Steel-Concrete Composite Structures (2018, June)

In EN 1994-1, design rules are given for the evaluation of the mechanical properties of structural steel-concrete composite joints (rotational stiffness, resistance and ductility) based on the component ... [more ▼]

In EN 1994-1, design rules are given for the evaluation of the mechanical properties of structural steel-concrete composite joints (rotational stiffness, resistance and ductility) based on the component method offered in EN 1993-1-8 and adding specific components for composite joints. These rules cover only the situations for the joints subjected to shear forces and hogging moments. However, during the last decades, researches have been conducted on the behaviour of composite joints subjected to different kind of actions such as sagging bending moments, cyclic loadings, combined bending moments and axial loads, elevated temperatures etc. with the objective of improving/extending the rules presently proposed in the Eurocodes design rules. As an outcome of the Technical Committee 11 of the European Convention of Constructional Steelwork (ECCS) dedicated to the behaviour of composite structures, a publication summarising these recent developments and their main outcomes is under finalisation. Within the present paper, it is proposed to highlight these main outcomes which could be seen as proposals for future improvements of the beam-to-column provisions in Eurocodes in general and of Eurocode 4 in particular. [less ▲]

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See detailAnalysis of the behaviour of semi rigid steel end plate connections
Bahaz, A.; Amara, S.; Jaspart, Jean-Pierre ULiege et al

in 2nd international congress on materials and structural stability (CMSS-2017) (2018, February 14)

The analysis of steel-framed building structures with full strength beam to column joints is quite standard nowadays. Buildings utilizing such framing systems are widely used in design practice. However ... [more ▼]

The analysis of steel-framed building structures with full strength beam to column joints is quite standard nowadays. Buildings utilizing such framing systems are widely used in design practice. However, there is a growing recognition of significant benefits in designing joints as partial strength/semi-rigid. The design of joints within this partial strength/semi-rigid approach is becoming more and more popular. This requires the knowledge of the full nonlinear moment-rotation behaviour of the joint, which is also a design parameter. The rotational behaviour of steel semi rigid connections can be studied using the finite element method for the following three reasons: i) such models are inexpensive; ii) they allow the understanding of local effects, which are difficult to measure accurately physically, and iii) they can be used to generate extensive parametric studies. This paper presents a three-dimensional finite element model using ABAQUS software in order to identify the effect of different parameters on the behaviour of semi rigid steel beam to column end plate connections. Contact and sliding between different elements, bolt pretension and geometric and material non-linearity are included in this model. A parametric study is conducted using a model of two end-plate configurations: flush and extended end plates. The studied parameters were as follows: bolts type, end plate thickness and column web stiffener. Then, the model was calibrated and validated with experimental results taken from the literature and with the model proposed by Eurocode3. The procedure for determining the moment–rotation curve using finite element analysis is also given together with a brief explanation of how the design moment resistance and the initial rotational stiffness of the joint are obtained. [less ▲]

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See detailBearing strength of shear connections for tubular structures: An analytical approach
Latour, Massimo ULiege; Rizzano, Gianvittorio; D'Antimo, Marina ULiege et al

in Thin-Walled Structures (2018), 127

This work deals with the prediction of the bearing resistance of elementary shear connections constituted by gusset plates and square hollow sections fastened with long bolts. The research is motivated by ... [more ▼]

This work deals with the prediction of the bearing resistance of elementary shear connections constituted by gusset plates and square hollow sections fastened with long bolts. The research is motivated by the lack of specific rules in international codes for this particular configuration. In fact, while in lap shear connections, single or double-sided, the holes are always confined out of plane, in case of connections with long bolts and gusset plates (typical of tubular structures), the holes are constrained out of plane outwards, but they are free to buckle inwards, providing a reduction of the bearing strength. Within this framework, the paper is aimed at the development of an analytical formulation for the prediction of the bearing resistance of connections with long bolts and square hollow sections (SHS). The proposal is based on the calculation of the post-buckling load of the tube plate subjected to bearing at the bolt hole, combining the Winter's formula (originally developed to predict the post-buckling strength of steel plates accounting for geometrical and mechanical imperfections) with a simplified FE model developed in SAP 2000. The procedure developed is presented in detail proposing a design equation for connections with long bolts, based on a formula suggested recently by Može (2014, 2016) suitable for the inclusion in code provisions such as EC3. The accuracy of the design equation is checked on the experimental data reported in a previous work of the same authors properly extended with parametric FE simulations to cope for variation of geometrical parameters. [less ▲]

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See detailEQUALJOINTS PLUS - Documento pre-normativo e linee guida per il progetto sismico dei nodi trave-colonna prequalificati
Landolfo, Raffaele; D'Aniello, Mario; Tartaglia, Roberto et al

Book published by ECCS (2018)

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See detailEQUALJOINTS PLUS - Volume informativo sui nodi pre-qualifcati per le applicazioni sismiche
Landolfo, Raffaele; D'Aniello, Mario; Costanzo, Silvia et al

Book published by ECCS (2018)

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See detailEQUALJOINTS PLUS - Semmelband mit pränormativen bemessungsempfehlungen für seismisch qualifizierte stahlanschlüsse
Landolfo, Raffaele; D'Aniello, Mario; Tartaglia, Roberto et al

Book published by ECCS (2018)

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See detailEQUALJOINTS PLUS - Sammelband mit informationsbroschüren für 4 seismisch qualifizierte anschlüsse
Landolfo, Raffaele; D'Aniello, Mario; Costanzo, Silvia et al

Book published by ECCS (2018)

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See detailPreliminary Study on Beam-To-Column Joints Under Impact Loading
D'Antimo, Marina ULiege; Latour, Massimo; Rizzano, Gianvittorio et al

in The Open Construction and BuildingTechnology Journal (2018), 12

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See detailEQUALJOINTS PLUS - Volume with information borchures for 4 seimsically qualified joints
Landolfo, Raffaele; D'Aniello, Mario; Costanzo, Silvia et al

Book published by ECCS (2018)

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See detailEQUALJOINTS PLUS - Volume with pre-normative design recommendations for seismically qualified steel joints
Landolfo, Raffaele; D'Aniello, Mario; Tartaglia, Roberto et al

Book published by ECCS (2018)

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See detailEQUALJOINTS PLUS Recommandations pré-normatives pour le calcul parasismique d'assemblages pré-qualifiés en construction métallique
Landolfo, Raffaele; D'Aniello, Mario; Tartaglia, Roberto et al

Book published by ECCS (2018)

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See detailEQUALJOINTS PLUS - Descritptif de 4 types d'assemblages préqualifiés pour la construction parasismique
Landolfo, Raffaele; D'Aniello, Mario; Costanzo, Silvia et al

Book published by ECCS (2018)

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