References of "Jaspart, Jean-Pierre"
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See detailResistance of through-plate component in beam-to-column joints with circular hollow columns
Hoang, Van Long ULiege; Demonceau, Jean-François ULiege; Jaspart, Jean-Pierre ULiege

in Journal of Constructional Steel Research (2014), 92

A configuration of beam-to-column joint with circular hollow section columns is proposed. A vertical plate, called through-plate, passing through the column is used to support the beams. In order to ... [more ▼]

A configuration of beam-to-column joint with circular hollow section columns is proposed. A vertical plate, called through-plate, passing through the column is used to support the beams. In order to facilitate connecting the beams, two horizontal plates, each side of the column, are welded to the upper side of the through-plate. The lower flanges of the steel beams are connected to the horizontal plates by bolts, and the upper flanges are attached to the concrete slab by shear connections. The joint is considered as hinges in the construction phase while semi-rigid and partial strength can be adopted for the joint behaviour during the exploitation time. A development on the through-plate component of the joint is presented in this paper. Global behaviour of the joint under hogging moment and shear force is analysed leading to a mechanical model of the through-plate component. Using the elastic buckling theory of plates, the analytical formulas for critical stresses of the through-plate are obtained. The coefficients taking into account boundary conditions, material plasticity and geometrical imperfection are determined by finite element analysis. The proposed model is validated by experimental results showing a good accuracy. The design guideline for the component is finally provided for the practical purpose. [less ▲]

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See detailRobustimpact - Drawings for producing the test specimens - Deliverable 4.2
Hoffman, Nadine; Kuhlmann, Ulrike; Huvelle, Clara ULiege et al

Report (2014)

Within the RFCS project RobustImpact an experimental campaign, aimed at investigating the behaviour of framed steel and concrete composite structures under accidental loading conditions, was planned. The ... [more ▼]

Within the RFCS project RobustImpact an experimental campaign, aimed at investigating the behaviour of framed steel and concrete composite structures under accidental loading conditions, was planned. The residual strength of the damaged member after an impact as well as the dynamic interaction of the member with the surrounding structure will be experimentally investigated. The activation of alternate load paths will be also studied through tests on 3D slab and 2Dbeam systems. Additional tests on composite joints, beam-to-column joints, column bases and T-stub tests under high speed loading and impact loading will contribute at investigating the influences of strain rate effect on the deformation capacity of the connections.This document collects the drawings prepared by the above mentioned partners for producing the test specimens. [less ▲]

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See detailRobusimpact - Design report of the specimens for all the experimental analyses - Deliverable 4.1
Hoffman, Nadine; Kuhlmann, Ulrike; Huvelle, Clara ULiege et al

Report (2014)

The present report focuses on the design of the experimental analysis that are going to be performed within the ROBUSTIMPACT project (Grant Agreement Number: RFSR-CT-2012-00029). The project focuses on ... [more ▼]

The present report focuses on the design of the experimental analysis that are going to be performed within the ROBUSTIMPACT project (Grant Agreement Number: RFSR-CT-2012-00029). The project focuses on the behavior of composite steel and concrete framed buildings against accidental actions. Within the project, several experimental analyses are going to be performed spanning from the local to the global behavior. [less ▲]

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See detailProposal of a simplified analytical approach for the characterisation of the end-plate component in circular tube connection
Hoang, Van Long ULiege; Demonceau, Jean-François ULiege; Jaspart, Jean-Pierre ULiege

in Journal of Constructional Steel Research (2013), 90

This paper presents a study realised at Liège University on the behaviour of the rectangular end-plate in bending and the bolt in tension components met in circular tube-to- circular tube connections and ... [more ▼]

This paper presents a study realised at Liège University on the behaviour of the rectangular end-plate in bending and the bolt in tension components met in circular tube-to- circular tube connections and in circular tubular column bases. Analytical formulas for the mentioned components are firstly proposed considering different yield line patterns for the end-plate. Then the results predicted through the proposed analytical approach are validated through comparisons to experimental and finite element results. Finally, the application of the proposed approach for the prediction of the strength of tube-to-tube joints and also for the prediction of the bolt force of column bases is demonstrated. [less ▲]

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See detailINNOVATIVE BOLTED BEAM-TO-COLUMN JOINTS IN MOMENT RESISTANT BUILDING FRAME: FROM EXPERIMENTAL TESTS TO DESIGN GUIDELINES
Hoang, Van Long ULiege; Demonceau, Jean-François ULiege; Jaspart, Jean-Pierre ULiege

in Dubina, Dan; Landolfo, Raffaele; Stratan, Aurel (Eds.) et al Application of High Strength Steels in Seismic Resistant Structures (2013)

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See detailA NEW SIMPLIFIED ANALYTICAL DESIGN METHOD FOR STEEL AND COMPOSITE SWAY FRAMES
Demonceau, Jean-François ULiege; Jaspart, Jean-Pierre ULiege

in Journal of Constructional Steel Research (2013)

Eurocode 4 is the European design code for composite construction; in its so-called EN 1994-1-1 version, the design of “non-sway buildings” is mainly covered. As a result, EC4 focuses on the check of ... [more ▼]

Eurocode 4 is the European design code for composite construction; in its so-called EN 1994-1-1 version, the design of “non-sway buildings” is mainly covered. As a result, EC4 focuses on the check of structural elements like beams, columns, slabs and joints. However, in the last years, the construction of taller buildings and larger industrial halls without wind bracing systems tends to make global instability a relevant failure mode, which is not well covered by Eurocode 4. Recently, intensive experimental, numerical and theoretical investigations have been carried out at Liège University. The latter aimed at improving the knowledge in the field of sway composite building frames and at developing appropriate design rules. The rotational behavior of the beam-to-column composite joints is one of the key aspects of the problem to which a special attention has been paid. This paper reflects investigations carried out at Liège University on this topic. In particular, an innovative simplified analytical method to predict the ultimate loading factor and the associated collapse mode of both steel and composite frames subjected to static loadings is presented. [less ▲]

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See detailBehaviour of bolted flange joints in tubular structures under monotonic, repeated and fatigue loadings I: Experimental tests
Hoang, Van Long ULiege; Jaspart, Jean-Pierre ULiege; Demonceau, Jean-François ULiege

in Journal of Constructional Steel Research (2013), 85

This paper presents a test program on bolted flange plate connections used in circular tubular structures. In the tested joints, the connected tubular elements are made of high strength steel (TS590 ... [more ▼]

This paper presents a test program on bolted flange plate connections used in circular tubular structures. In the tested joints, the connected tubular elements are made of high strength steel (TS590) whilst normal steel grade (S355) is used for the flanges. The tests were performed under monotonic loadings to obtain the mechanical properties of the connections and under cyclic loadings to characterise the behaviour of these connections for low cycle and high cycle fatigue. The test results are first presented herein, including a critical analysis of the latter; then, designmethods available in literature are applied for the tested configurations with the objective to investigate the accuracy of these methods through comparisons with the experimental results. [less ▲]

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See detailRobustness of steel building structures following a column loss
Huvelle, Clara ULiege; Jaspart, Jean-Pierre ULiege; Demonceau, Jean-François ULiege

in IABSE Workshop Helsinki 2013 "Safety, Failures and Robustness of Large Structures" Report (2013, February)

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See detailAnalyses of the rotational capacity of composite connections for plastic design
Hechler, Oliver; Odenbreit, Christoph; Jaspart, Jean-Pierre ULiege

in Composite Construction in Steel and Concrete Vll (2013)

The demand for economic and eco-efficient solutions in construction industry is particularly enforcing efficient design and construction methods. The design of composite construction according to the ... [more ▼]

The demand for economic and eco-efficient solutions in construction industry is particularly enforcing efficient design and construction methods. The design of composite construction according to the plastic hinge theory in combination with semi-rigid joints provides one contemporary promising answer to these demands. This combination enables to mobilize almost all cross section and system reserves. However, the capability for redistribution of the bending moment from internal support to mid-span, to activate these system reserves requires sufficient rotation capacity of the composite beam and, especially, the connections. This paper presents design guidance on plastic and robust design of composite beams with semi-rigid composite conenctions with special focus on the influence of the reinforcement (ratio, diameter and type). With the provision of an engineering logic, new opportunities to design elegant and slender structures are given to engineers in a simple way. [less ▲]

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See detailComposite joints under M-N at elevated temperatures - Experimental investigations and analytical model
Demonceau, Jean-François ULiege; Haremza, Cécile; Jaspart, Jean-Pierre ULiege et al

in Proceeding of the Composite Construction VII conference (2013)

The Eurocodes recognise robustness as a way to ensure the structural integrity of a building frame subjected to an unforeseen event and therefore to avoid a so-called “progressive failure” mode in extreme ... [more ▼]

The Eurocodes recognise robustness as a way to ensure the structural integrity of a building frame subjected to an unforeseen event and therefore to avoid a so-called “progressive failure” mode in extreme loading situations. However few practical guidelines exist nowadays which would allow a designer to design a structure accordingly. Within the European RFCS ROBUSTFIRE project, the behaviour of steel and composite car parks subjected to localised fire leading to a column loss was investigated. Under such a scenario, the beam-to-column joints play a key role in the global structural response. Indeed, these joints, initially loaded in bending, may be subjected to elevated temperatures and to combined axial load “N” and bending moment “M”. In this paper, a methodology to predict the mechanical response of bolted composite beam-to-column joints at elevated temperatures under M-N is presented and validated through comparison to experimental tests conducted at the University of Coimbra. [less ▲]

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See detailStability of non-sway steel frames with semi-rigid connections
Ihaddoudène, A.N.T.; Jaspart, Jean-Pierre ULiege

in Topping, BHV; Ivanyi, P (Eds.) Proceeding of the Fourtheenth International Conference on Civil, Structural and Environmental Engineering Computing (2013)

Conventional analysis of steel frames assumes either perfectly rigid or pinned connections. he rigidity of most connections behaves, in fact, soinewhat between these two extremes. Therefore incorporating ... [more ▼]

Conventional analysis of steel frames assumes either perfectly rigid or pinned connections. he rigidity of most connections behaves, in fact, soinewhat between these two extremes. Therefore incorporating the effect of connection flexibility into the analysis and design procedure of the frame becomes necessary. Buckling of a column is fundamental to the design of load bearing structures mainly when the analysis of such frames takes into account the effect of the connection ílexibility. The objective of this work is to present a simplified approach for the evaluation of the elastic buckling load for steel frames with semi-rigid joints. To this end, a simple model that takes into account the effect of beam-column joint flexibility in the analysis of steel frames is proposed and a corresponding stiffiiess matrix element is presented. The developed model has been verified to be valid through an illustrative example found in the literature; numerical results are provided to illustrate the accuracy of the results. [less ▲]

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See detailAnalytical model for the evaluation of torsional connection restraints of steel beams in bending
Amara, Salah; Zaidi, Ali; Lamara, Mohamed et al

in Revue des SCiences et Sciences de l'Ingénieur (2012), 02(1), 32-40

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See detailA "new" design requirement: the mitigation of the progressive collapse of buildings under exceptional loading
Jaspart, Jean-Pierre ULiege; Demonceau, Jean-François ULiege

in Proceedings of the First International Conference of Civil Engineering (2012, November)

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 Eurocodes and ... [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 Eurocodes and some different other national design codes, the structural integrity of civil engineering structures should be ensured through appropriate measures but, in most cases, no precise practical guidelines on how to achieve this goal are provided. At Liège University, the robustness of building frames is investigated with the final objective to propose design requirements to mitigate the risk of progressive collapse considering the conventional scenario “loss of a column” further to an unspecified event. In particular, a complete analytical procedure has been developed for the verification of the robustness of steel or composite plane frames. For sake of simplicity, these first works have been based on the assumption that the dynamic effects linked to the column loss were limited and could therefore be neglected. More recently, complementary works have been carried out with the objective to address the dynamic effects. Besides that, the extension of the static procedure to actual 3D frames is under investigation in Liège. The present paper gives a global overview of the ongoing researches in the field of robustness at Liège University; in particular, the global strategy to derive design requirements is detailed. [less ▲]

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See detailGap analysis on robustness of tubular structures
Jaspart, Jean-Pierre ULiege; Huvelle, Clara ULiege; Demonceau, Jean-François ULiege

Report (2012)

Recent events such as natural catastrophes (tsunami, hurricane, …) or terrorism attacks have highlighted the necessity of ensuring the structural integrity of buildings under exceptional events with the ... [more ▼]

Recent events such as natural catastrophes (tsunami, hurricane, …) or terrorism attacks have highlighted the necessity of ensuring the structural integrity of buildings under exceptional events with the objective to save the life of the occupants and of the safety services (fireman, ambulance man, …) and also to avoid collateral damages to the adjoining buildings. The partial collapse of the Ronan Point Tower in 1968 in UK is considered as the starting point of the interest in the structural integrity of buildings but more recent catastrophes in the last decade such as the terrorist attack of the World Trade Center towers in 2001 or the earthquake/tsunami in Fukushima in 2011 have increased the interest of the engineering community and also of the population in this topic. According to different national and international design codes, the structural integrity of civil engineering structures should be ensured through appropriate measures but, in most of the cases, no precise practical guidelines on how to achieve this goal are provided. In the present report, some definitions are first given. Existing codes and standards are then reviewed and main conclusions are drawn on their adequacy to the present needs of practitioners. From this analysis, general and specific research needs within CIDECT are identified. These ones are detailed in two dedicated sections respectively on buildings and trusses. A summary table draws the main conclusions in terms of future required CIDECT investments. Finally some references to literature are listed. [less ▲]

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See detailAnalytical model for the evaluation of torsional connection restraints of steel beams in bending
Amara, Salah; Zaidi, Ali; Lamara, Mohamed et al

Scientific conference (2012, May 08)

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See detailRobustness of car parks against localised fire - Deliverable IV: Development of FEM model for car parks under localised fire
Fang, Cheng; Izzuddin, Bassam; Elghazouli, Ahmed et al

Report (2012)

Research Programme of the Research Fund for Coal and Steel - Steel RTD Project carried out with a financial grant of the Research Programme of the Research Fund for Coal and Steel - Grant Agreement Number ... [more ▼]

Research Programme of the Research Fund for Coal and Steel - Steel RTD Project carried out with a financial grant of the Research Programme of the Research Fund for Coal and Steel - Grant Agreement Number RFSR‐CT‐2008‐00036 [less ▲]

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See detailRobustness of car parks against localised fire
Demonceau, Jean-François ULiege; Huvelle, Clara ULiege; Coméliau, Ludivine ULiege et al

Book published by Communauté Européene (2012)

Research Programme of the Research Fund for Coal and Steel Steel RTD Project carried out with a financial grant of the Research Programme of the Research Fund for Coal and Steel

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See detailDesign and integrity assessment of high strength tubular structures for extreme loading conditions
Bursi, Oreste; Kumar, Anil; Demofonti, Giuseppe et al

Book published by European Commission (2012)

High Strength Steel (HSS) characterized by yield strength ranging between 500MPa to 700MPa has been available for many years. However, its use in onshore engineering is quite restrictive. Reasons were ... [more ▼]

High Strength Steel (HSS) characterized by yield strength ranging between 500MPa to 700MPa has been available for many years. However, its use in onshore engineering is quite restrictive. Reasons were threefold: i) Eurocodes covered steels with yield strength up to 460MPa; ii) higher costs than regular steel; iii) lack of conceptual design with HSS. Nonetheless very recently, there has been a growing trend for the use of HSS in tubular structures thanks to Eurocode 3 Part 1-12 (2006), that extended its scope to steel grades up to S690/S700MC. Along this line, the HITUBES project intended to develop performance-based designs and assessment procedures to make full use of HSS tubes up to S700MC for structures subject also to extreme repeated loads; in fact Eurocode 3 Part 1-12 imposes many limitations at the material, structural and design level. The ambitious targets are to increase the performance of tubular structures, reduce weights, construction and operating costs. The project covered the period 01/07/2008-31/12/2011, and main research work focussed on several aspects listed herein: literature survey; selection of finite element-based and identification dynamic analysis codes; selection of realistic Case Studies and FE analysis for the evaluation of actions and stresses; structural identification and health monitoring of a cable-stay and arch footbridges; tests planning and execution including welding procedure specifications; simulations of welded and bolted connections under monotonic, low-cycle and high-cycle fatigue loadings; simulation of Case studies and reliability analysis for quantification of realistic performance scenarios; SWOT analysis and monitoring of project activities. [less ▲]

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