References of "D'Antimo, Marina"
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See detailExperimental and theoretical analysis of shear bolted connections for tubular structures
D'Antimo, Marina ULiege; Demonceau, Jean-François ULiege; Jaspart, Jean-Pierre ULiege et al

in Journal of Constructional Steel Research (2017), 138

In this paper, numerical and experimental investigations devoted to the evaluation of the bearing resistance of tubular members with gusset plates and through-all long bolts are presented. Unlike lap ... [more ▼]

In this paper, numerical and experimental investigations devoted to the evaluation of the bearing resistance of tubular members with gusset plates and through-all long bolts are presented. Unlike lap shear joints, the analysed connection evidences a reduced confinement of the bearing area associated to the use of long bolts and the presence of a gap in the member, which can lead, consequently, to a reduction of the bearing resistance. In order to investigate the behaviour of shear connections made up of thin and thick SHS (Square Hollow Section) profiles and long bolts, an experimental test campaign including 24 specimens and FE simulations have been conducted. Both experimental and FE results have confirmed the influence of local instability on the hole in bearing resistance of thin profiles and the poor accuracy of the available standards for this particular joint typology. In particular, the performed comparisons have shown that, for thin profiles, EC3 model is likely to overestimate the resistance, while for higher thickness of the SHS conservative predictions are obtained. The present paper presents the conducted experimental and numerical investigations, highlighting at the end the need for a proper formulation able to account for the local instability effect on the bearing resistance. [less ▲]

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See detailDetermination of loading scenarios on buildings due to column damage
Colomer, Carles Segura; Hamra, Lotfi; D'Antimo, Marina ULiege et al

in Structures (2017), Volume 12

The majority of imaginable (and relevant) accidental scenarios on building structures are initiated at the ground level by a column suffering damage, mainly due to a localized explosion or a vehicle ... [more ▼]

The majority of imaginable (and relevant) accidental scenarios on building structures are initiated at the ground level by a column suffering damage, mainly due to a localized explosion or a vehicle impact. The transmitted vertical forces from the column to the structure are decisive in understanding the response of the building and are the subject of analysis of this paper. The classic definition of a column loss scenario is extended here by means of a simplified analytical approach to characterize the axial forces appearing in the column during the damage process. A simple closed-form solution is proposed to define the loading scenario on the structure and compared to the classic rectangular (un)loading approach. In certain cases, the proposed analysis shows a more unfavorable loading situation for the structure, which needs to be accounted for during design. [less ▲]

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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 Proceedings CTA 2017 (2017, September)

Recent catastrophic events have pointed out the necessity of ensuring the integrity for structures under “exceptional” events. Since many years, the University of Liège is involved in different activities ... [more ▼]

Recent catastrophic events have pointed out the necessity of ensuring the integrity for structures under “exceptional” events. Since many years, the University of Liège is involved in different activities and projects mainly related to the robustness assessment of structures. The robustness of a structure is the capacity of the system to remain globally stable after events not directly ac- counted for in the design, like impact, fire or consequences of a human error, leading to a reason- able damage when compared to the original cause. Particular attention has been dedicated to the loss of column scenario with analytical and numerical investigations. As a contribution to differ- ent European projects (FREEDAM and ROBUSTIMPACT), experimental campaigns have been carried out or are currently undergoing, with the aim of understanding the behaviour of different joint typologies under impact loads. The experimental campaigns have the goal to underline the influence of the strain-rate of the joint components on the behaviour of the tested connections. In the present paper, an overview on the design criteria for the ongoing experimental campaign, on the preliminary results and findings is given and critically analysed. Particularly, an application in the field of the FREEDAM project is presented. [less ▲]

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See detailBeam-to-column joints, column bases and joint components under impact loading
Demonceau, Jean-François ULiege; Vanvinckenroye, Hélène ULiege; D'Antimo, Marina ULiege et al

in Proceeding of Eurosteel 2017 conference (2017, September)

Recent events such as natural catastrophes or terrorist attacks have highlighted the necessity to ensure the structural integrity of buildings under exceptional events. For more than 10 years, the ... [more ▼]

Recent events such as natural catastrophes or terrorist attacks have highlighted the necessity to ensure the structural integrity of buildings under exceptional events. For more than 10 years, the University of Liege is strongly involved in researches on the response of structures further to such exceptional events through participations to national or European research projects. In particular, the University of Liege has contributed very recently to a European research project entitled ROBUSTIMPACT investigating the behaviour of steel or steel-concrete composite building structures subjected to impact loading and proposing simplified procedures to predict the response of such structures under the considered scenario. As a contribution to this research project, an experimental test campaign was realised in Liège; the objective was to study the behaviour of beam-to-column joints, of column bases and of most of their constitutive components under impact loading and, in particular, to highlight the influence of the strain rate effects on the response of the studied joints and components. The proposed paper first describes the conducted test campaign with all the required details about the tested specimens and the testing setup; then the analysis of the so-obtained experimental results is presented. Finally authors’ views on how to account for the strain rate effects in analytical approaches for joint design is briefly expressed. [less ▲]

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See detailExperimental investigation of the creep effect on prestressed bolts used in innovative friction connections
D'Antimo, Marina ULiege; Demonceau, Jean-François ULiege; Latour, Massimo et al

in Experimental investigation of the creep effect on prestressed bolts used in innovative friction connections (2017)

In the framework of a RFCS project entitled “FREEDAM -Free From Damage Connections”, innovative friction connections activated as dissipative zones in case of seismic actions are studied, with the ... [more ▼]

In the framework of a RFCS project entitled “FREEDAM -Free From Damage Connections”, innovative friction connections activated as dissipative zones in case of seismic actions are studied, with the objective to avoid any damage in the structures not only for frequent and occasional seismic events, but also for destructive earthquakes. These friction connections are made of stainless steel plates with specific coatings fastened with preloaded bolts placed in long slotted holes allowing significant displacement of the plates when the friction resistance is reached and so allowing significant dissipation of energy. As a partner of this project, The University of Liege is in charge of proposing analytical design procedures for these innovative joints and in particular of investigating the evolution of the prestressing in the bolts according to time, a key parameter when it is intended to dissipate energy through the activation of friction. This paper presents first preliminary results obtained through long term tests (5 months) performed on steel plates with particular coatings fastened with M20 Bolts. The main parameters registered during these tests were the relative displacements between the connected plates and the evolution of the prestressing in the bolts. The tests were performed according to EN 1090-2, in order to assess the loss of preloading over time and the creep of the plate. The final objective of the conducted studies is to propose a methodology to predict the prestressing loss in order to ensure that a minimum level of prestressing is kept over the full life of the structures, i.e. at least 50 years. [less ▲]

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See detailINFLUENCE OF LOCAL BUCKLING ON THE SHEAR RESISTANCE OF BOLTED CONNECTIONS FOR TUBULAR RACKING STRUCTURES
D'Antimo, Marina ULiege; Demonceau, Jean-François ULiege; Jaspart, Jean-Pierre ULiege et al

in THE INTERNATIONAL COLLOQUIUM ON STABILITY AND DUCTILITY OF STEEL STRUCTURES, Timisoara 30 May-01 June 2016 (2016, May)

The competition in the field of storage racking structures is so that companies are always look-ing for new structural solutions aiming at containing construction time and expenses. This pa-per focuses ... [more ▼]

The competition in the field of storage racking structures is so that companies are always look-ing for new structural solutions aiming at containing construction time and expenses. This pa-per focuses the bearing failure of shear joint using long bolts through thin tubular members with the purpose to check the reliability of Eurocode 3 formulation. The used hollow sections are free to buckle inward leading to a bearing resistance lower than the one predicted using EC3. In fact EC3 does not account for the possible occurrence of out-of-plane deformations in shear connection assuming that the connected plates are restrained by the bolt head and the nut. In order to investigate this phenomenon, an experimental campaign has been developed, a FE model Abaqus/CAE has been validated and a parametric study has been performed. The present paper introduces the conducted investigations. [less ▲]

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See detailANALYTICAL PREDICTION OF THE BEARING RESISTANCE OF BOLTED CONNECTIONS FOR TUBULAR RACKING STRUCTURES
Armenante, Vittorio; D'Antimo, Marina ULiege; Demonceau, Jean-François ULiege et al

in THE INTERNATIONAL COLLOQUIUM ON STABILITY AND DUCTILITY OF STEEL STRUCTURES, Timisoara 30 May-01 June 2016 (2016, May)

The aim of this paper is to provide a formulation able to predict the resistance of simple shear connections realized by fastening a plate to a hollow square section by means of long bolts. The research ... [more ▼]

The aim of this paper is to provide a formulation able to predict the resistance of simple shear connections realized by fastening a plate to a hollow square section by means of long bolts. The research is motivated by the fact that the rules currently provided by EC3 for defining the bearing resistance of steel connections are limited to the case of stacks of plates, where every plate composing the connection is always restrained out of plane by the adjoining plate or by the bolt head or nut. This is a condition not verified in case of connections realized with long bolts fastening hollow sections. The work is organized in two sections. First, the results of an experimental campaign are presented and successively, the results of a parametric analysis carried out by means of a Finite Element model calibrated on the experimental data are reported. Afterwards, an analytical approach able to include the local buckling effects arising in these kinds of connections is presented, proposing a coefficient for the reduction of the resistance, to be included in the EC3 formulation. [less ▲]

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See detailVerification of analytical and numerical tools - Deliverable D.5b - Robustimpact
Hoffmann, Nadine; Kuhlmann, Ulrike; Vanvinckenroye, Hélène ULiege et al

Report (2016)

The numerical recalculation performed on the slab, beam and joint tests as well as the analytical recalculation of these tests have been employed as support for the experimental investigations represented ... [more ▼]

The numerical recalculation performed on the slab, beam and joint tests as well as the analytical recalculation of these tests have been employed as support for the experimental investigations represented within the previous chapter. In particular, numerical and analytical analysis have been performed to design the experimental test and the test setup for the symmetric and the asymmetric 3D test performed by UTRE. For the 2D-frame tests a numerical simulation was performed and the analytical model was validated. In addition to the recalculation of the experimental investigations on composite joints some parameters were varied in order to evaluate the influence on the behavior of the composite joints. Furthermore an analytical approach to predict the response of joints subjected to M-N-loading was investigated. In addition, analytical calculations have been performed in order to predict the results of the static and dynamic experimental tests. [less ▲]

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See detailSimplified equivalent static approach and results for deriving structural requirements - Deliverables D.11 and D.12 - Robustimpact
Demonceau, Jean-François ULiege; D'Antimo, Marina ULiege; Huvelle, Clara et al

Report (2016)

Deliverable 11 and 12 have been merged in the present document which can be seen as the main outcome of the activities conducted with Work Package 9 of the Robustimpact project. Section 2 presents first ... [more ▼]

Deliverable 11 and 12 have been merged in the present document which can be seen as the main outcome of the activities conducted with Work Package 9 of the Robustimpact project. Section 2 presents first the sophisticated numerical investigations conducted on a reference structure subjected to impacts of vehicles. Then, Section 3 presents in details the simplified analytical models/tools developed within the present project to predict the response of a structure (or a part of a structure) further to the impact of a vehicle. With the presented models, it is demonstrated that an accurate prediction of the structural results may be obtained and that all the parameters influencing this response are mastered. Section 4 introduces the different parametric studies which have been conducted (partly using the models/tools presented in Section 3) on 2D and 3D steel and composite structures or on composite floors. Finally, Section 5 highlights the structural requirements which can be proposed as an outcome of the performed investigations. Through this document, it is demonstrated that the different objectives of Work Package 9 have been reached in the framework of this project. [less ▲]

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See detailBehaviour of composite joints under combined bending moments and axial loads - Deliverable D.9 - Robustimpact
D'Antimo, Marina ULiege; Demonceau, Jean-François ULiege; Jaspart, Jean-Pierre ULiege

Report (2016)

The present work is dedicated to the behaviour of composite joints under combined bending moments and axial loads. The results presented in this part have been mainly developed in [1]. The component ... [more ▼]

The present work is dedicated to the behaviour of composite joints under combined bending moments and axial loads. The results presented in this part have been mainly developed in [1]. The component method is a nowadays widely recognized procedure for the evaluation of the design properties of structural joints. It is used as a reference method in the Eurocodes and the proposed rules in these codes are mainly devoted to the characterization of joints subjected to bending moments and shear forces. However, in some situations, these joints can be subjected to combined axial loads and bending moments, for instance in frames subjected to an exceptional event leading to the loss of a column, situation where significant tying forces can developed in the structural beams above the lost column. The purpose of this work is to present and validate a design model, founded on the component method, aiming at predicting the behaviour of composite joints subjected to combined axial loads and bending moments. In particular, in the following the validation of this model through comparisons to recent experimental tests performed on steel composite beam-to-column joints at University of Stuttgart will be presented. The proposed method is mainly adapted from the former research work of Demonceau [2]. Some changes are made in order to improve the former method and also to extend it to the type of joints used in the framework of the current European project (Deliverable 5). Beam to column composite joints with flush-end-plate connection are mainly investigated hereinafter. The work will manly focus on the behaviour of joints under sagging moments, as it has not been widely researched yet in comparison to joints under hogging moment. An excel-based routine of the proposed method has been developed; it has been designed to be adaptable to different types of composite joints, with the objective to facilitate the verification and/or the application of the above-mentioned design model. [less ▲]

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See detailShear bolted connections for tubular racking structures: Numerical analysis
D'Antimo, Marina ULiege; Demonceau, Jean-François ULiege; Jaspart, Jean-Pierre ULiege et al

in Proceeding of XXV Congresso CTA: Salerno 1-3 ottobre 2015 (2015)

The prediction of the shear resistance of connections as presently given in Eurocode 3, Part 1-8, cannot be applied in a straightforward way to the connection for tubular racking structures realized by ... [more ▼]

The prediction of the shear resistance of connections as presently given in Eurocode 3, Part 1-8, cannot be applied in a straightforward way to the connection for tubular racking structures realized by means of long through bolts. In order to verify the possibility to extend the codified approach to such joint configurations, in the present paper a finite element model with three-dimensional solid elements is established investigating the behaviour of the connections under shear load in a wide range of variability of the geometrical parameters. The validation of the numerical model has been performed starting from the results of experimental tests already performed by the authors at the laboratory on Materials and Structures of the University of Liège. Based on the finite element results, the load displacement curves for all the assemblies were successfully predicted evidencing the important role played by the hole’s geometry and reduced diameter of the bolts on the initial stiffness of the connections. The results of a parametric study by means of a calibrated FE model in Abaqus/CAE allowed to verify the possibility to extend the formulations provided by EC3 for predicting the bearing resistance of plates to these kind of connections and to analyse the influence of the main parameters governing the bearing resistance: the distance e1 between the hole and the edge of the tube, the distance e2 between the hole and the lateral edge of the plate composing the tube section and the thickness t of the tube. [less ▲]

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See detailExperimental investigation of shear bolted connections for tubular racking structures
D'Antimo, Marina ULiege; Demonceau, Jean-François ULiege; Jaspart, Jean-Pierre ULiege et al

in XXV Congresso CTA: Salerno 1-3 ottobre 2015 (2015)

The competition in the field of storage racking structures is so that the companies proposing structural solutions for such structures are always looking for an optimisation of the structural elements ... [more ▼]

The competition in the field of storage racking structures is so that the companies proposing structural solutions for such structures are always looking for an optimisation of the structural elements, through the use of optimized thin wall members, and for an optimisation on site, by proposing easy and cheap connections to limit the time of construction. Within this framework, a simple connection with long bolts for tubular racking structures represents an interesting solution whose shear resistance is not covered by the rules provided by the current EC3. In order to verify the possibility to extend the formulations given in EC3 for connections between plates elements to this kind of connection solution in the present paper the results of an experimental campaign on 24 bolted connections, between hollow tube and long through bolts, are presented and analysed. In particular the attention is focused on the bearing failure mode around the tube’s hole due to bolt’s shank contact pressure. The performed analyses evidenced, preliminarily, that Eurocode 3 gives conservative values for the prediction of the bearing resistance. [less ▲]

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