References of "Jaspart, Jean-Pierre"
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See detailInnovative bolted beam-to-column joints for seismic resistant building frames
Coméliau, Ludivine ULg; Demonceau, Jean-François ULg; Jaspart, Jean-Pierre ULg

in Dubina, Dan; Grecea, Daniel (Eds.) CONNECTIONS VII proceedings (2012)

In the present paper, innovative joint configurations leading to more economical solutions for full-strength beam-to-column joints for seismic building frames are detailed. The specificities of these ... [more ▼]

In the present paper, innovative joint configurations leading to more economical solutions for full-strength beam-to-column joints for seismic building frames are detailed. The specificities of these joints are due to the fact that (i) the column is made of high strength steel while the beam are made of mild carbon steel and (ii) the design of some components allows partially neglecting the overstrength factor. Also, methods for the characterisation of specific joint components not directly covered by the Eurocode recommendations are proposed. [less ▲]

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See detailATTEL PERFORMANCE-BASED APPROACHES FOR HIGH STRENGTH TUBULAR COLUMNS AND CONNECTIONS UNDER EARTHQUAKE AND FIRE LOADINGS - D6
Pournara, Aglaia-Eugenia; Varelis, George E.; Papatheocharis, Charis et al

Report (2012)

Design Guidelines and proposal for EC3, EC4 and EC8

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See detailHITUBES PROJECT DESIGN AND INTEGRITY ASSESSMENT OF HIGH STRENGTH TUBULAR STRUCTURES FOR EXTREME LOADING CONDITIONS - D7
Rivera, Sergio; Alvarez, Ricardo; Lezcano, Ricardo et al

Report (2012)

D7.1: Report on design guidelines and recommendations for HSS for tubular structures D7.2: Report on design guidelines and recommendations for tubular members and connections D7.3: Report on maintenance ... [more ▼]

D7.1: Report on design guidelines and recommendations for HSS for tubular structures D7.2: Report on design guidelines and recommendations for tubular members and connections D7.3: Report on maintenance and durability of HSS tubular structures [less ▲]

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See detailATTEL PROJECT PERFORMANCE-BASED APPROACHES FOR HIGH STRENGTH TUBULAR COLUMNS AND CONNECTIONS UNDER EARTHQUAKE AND FIRE LOADINGS - D5
Sommariva, Manuel; Maio, Daniele; Demonceau, Jean-François ULg et al

Report (2012)

D.5.1. : Definition of stability curves D.5.2. : D5.2: simulation data relevant to the selected typologies of base-joints, of HSS-CHS columns and HSS-CFT columns and of HSS-concrete composite beam-to ... [more ▼]

D.5.1. : Definition of stability curves D.5.2. : D5.2: simulation data relevant to the selected typologies of base-joints, of HSS-CHS columns and HSS-CFT columns and of HSS-concrete composite beam-to-column joints D.5.3. : Report on parametric numerical analyses [less ▲]

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See detailHITUBES PROJECT DESIGN AND INTEGRITY ASSESSMENT OF HIGH STRENGTH TUBULAR STRUCTURES FOR EXTREME LOADING CONDITIONS - D2
Jaspart, Jean-Pierre ULg; Demonceau, Jean-François ULg; Hoang, Van Long ULg et al

Report (2012)

D2.1: Actions on foot- cycle-bridges and railway bridges and stresses on critical elements. D2.2: Validation of MB and FE software and estimation of stresses on critical elements.

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See detailPerformance-based Approaches for high strength Tubular columns and connections under Earthquake and fire Loadings (ATTEL) - D4
Sommariva, Manuel; Maio, Daniele; Demonceau, Jean-François ULg et al

Report (2012)

Fire test data

Detailed reference viewed: 54 (13 ULg)
See detailFP6 PROHITECH project: Volume 6: Seismic protection of historical buildings: application and design
Aleksievska, Jasmina Hadzieva; Aleksovska, Marija; Altay Askar, Gülay et al

Book published by Polimetrica (2012)

Detailed reference viewed: 204 (14 ULg)
See detailFP6 PROHITECH project: Volume 5: Seismic protection of historical buildings: calculation models
Altay Askar, Gülay; Arion, Cristian; Barrecchia, Enrico et al

Book published by Polimetrica (2012)

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See detailFP6 PROHITECH project: Volume 4: Seismic Protection of historical buildings: numerical analysis
Aleksovska, Marija; Altay Askar, Gülay; Aras, Fuat et al

Book published by Polimetrica (2012)

Detailed reference viewed: 115 (7 ULg)
See detailFP6 PROHITECH project: Volume 3: Seismic Protection of historical buildings: experimental activity
Arangelovski, Toni; Altay Askar, Gülay; Aras, Fuat et al

Book published by Polimetrica (2012)

Detailed reference viewed: 112 (6 ULg)
See detailFP6 PROHITECH project: Volume 1: Intervention strategies for the seismic protection of historical building heritage in the Mediterranean basin
Aleksievska, Jasmina Hadzieva; Altay Askar, Gülay; Arion, Cristian et al

Book published by Polimetrica (2012)

Detailed reference viewed: 220 (8 ULg)
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See detailValorisation action of plastic member capacity of semi-compact steel sections - a more economic design
Greiner, Richard; Lechner, Andreas; Kettler, Markus et al

Conference (2011, October 12)

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See detailROBUSTNESS OF BUILDING STRUCTURES - Recent developments and adopted strategy
Demonceau, Jean-François ULg; Coméliau, Ludivine ULg; Jaspart, Jean-Pierre ULg

in Eurosteel 2011 - 6th European Conference on Steel and Composite Structures - Proceedings (2011, 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 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 the University of Liège, the robustness of building frames is investigated following the so-called “alternative load path method”, 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, 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 the University of Liège and, in particular, the global strategy aiming at deriving design requirements is detailed. [less ▲]

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See detailNon-dissipative joints in seismic resistant building frames - Bolted beam-to-column joints
Coméliau, Ludivine ULg; Demonceau, Jean-François ULg; Jaspart, Jean-Pierre ULg

in EUROSTEEL 2011 - 6th European Conference on Steel and Composite Structures - Proceedings (2011, September)

According to Eurocode 8, earthquake resistant steel building frames shall be designed following either the “low dissipative structural behaviour concept” or the “dissipative structural behaviour concept” ... [more ▼]

According to Eurocode 8, earthquake resistant steel building frames shall be designed following either the “low dissipative structural behaviour concept” or the “dissipative structural behaviour concept”. In the second concept, the capability of parts of the structure to resist earthquake actions through inelastic behaviour is taken into account: energy is dissipated in plastic mechanisms. In such a design, it has to be ensured that the dissipative zones form where they are intended to and that they yield before other zones leave the elastic range. In particular, moment resisting frames are designed in such a way that plastic hinges develop at the extremities of the beams. These dissipative zones can be located either in the beams or in the beam-to-column joints. In this paper, non-dissipative bolted beam-to-column connections are considered. They must be sufficiently resistant to remain in elastic range while cyclic yielding develops in the dissipative zones located in the beams. Besides, the possibility that the actual yield strength of the beam is higher than the nominal value has to be taken into account by a material overstrength factor. Such an approach generally leads to very strong and thus expensive joints. In the present paper, a design strategy leading to more economical solutions for full-strength beam-to-column joints is detailed. This study was conducted within the framework of an RFCS project called HSS-SERF (High Strength Steel in Seismic Resistant Building Frames). The considered moment-resisting joints are part of seismic resistant building frames made of high strength steel composite columns and mild carbon steel beams. The columns are either partially-encased wide-flange columns (H columns) or concrete-filled rectangular hollow-section columns (RHS columns). The proposed joint configuration uses hammer-heads extracted from the beam profile. To fulfil the resistance requirement taking account of the possible overstrength of the beam, the resistant moment of the joint is decomposed in the contributions of the different components involved. Then, no overstrength factor needs to be considered for the components related to the beam itself and to the hammer-heads. This approach is in full accordance with the basic principles of Eurocode 8 and can decrease much the required resistance of the joints provided some conditions are fulfilled, meaning lower costs. [less ▲]

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See detailRobustness of building frames further to a column loss - Substructure approach with account of dynamic effects
Coméliau, Ludivine ULg; Demonceau, Jean-François ULg; Jaspart, Jean-Pierre ULg

in EUROSTEEL 2011 - 6th European Conference on Steel and Composite Structures - Proceedings (2011, September)

Nowadays, it is a concern to mitigate the risk of progressive collapse of a whole structure further to exceptional events such as explosions, impacts, fire... Different general approaches are proposed in ... [more ▼]

Nowadays, it is a concern to mitigate the risk of progressive collapse of a whole structure further to exceptional events such as explosions, impacts, fire... Different general approaches are proposed in the Eurocodes and some other national design codes to ensure the robustness of structures, although very few practical guidelines are provided. In the present study, the so-called “alternative load path method” is followed and the conventional scenario “loss of a column” is considered. Investigations were conducted at the University of Liège in the last few years regarding the static behaviour of two-dimensional building frames suffering the loss of a column further to an unspecified accidental event. They resulted in the development of simplified analytical methods for the prediction of the structural response assuming a static behaviour. In particular, it was shown that a substructure composed of the double-beam overhanging directly the lost column and its beam-to-column joints is able to reproduce the response of a 2D frame when membrane forces develop in the beams after the formation of the global beam plastic mechanism induced by the column loss. The dynamic behaviour of such a substructure was more recently investigated. As a result, a simplified approach was developed for the prediction of the maximal displacement of the system and subsequently the internal forces developing in the substructure, permitting the definition of ductility and resistance requirements for robustness. In the present paper, the whole analytical procedure is applied to a particular substructure. First, the static response is determined. Then the proposed model is used to predict the dynamic behaviour of the substructure as a function of the load initially supported by the failing column and the duration of its removal. In this paper, analytical approaches developed at the University of Liège are applied to predict the response of the considered substructure and the results are compared to numerical simulations; but the development of these methods and the observed phenomena are not detailed. [less ▲]

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See detailRobustness of steel and composite building structures
Jaspart, Jean-Pierre ULg; Demonceau, Jean-François ULg; Coméliau, Ludivine ULg

in 7th National conference on steel structures proceedings (2011, 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 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. <br />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, 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 and, in particular, the global strategy aiming at deriving design requirements is detailed. [less ▲]

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See detailCONNECTIONS WITH FOUR BOLTS PER HORIZONTAL ROW - Application of Eurocode 3
Demonceau, Jean-François ULg; Jaspart, Jean-Pierre ULg; Weynand, Klaus et al

in Eurosteel 2011 - 6th European Conference on Steel and Composite Structures - Proceedings (2011, September)

Eurocode 3 Part 1-8 provides detailed application rules for the design of bolted end-plate connections. Although these rules apply to connections with any number of vertical bolt rows, most of them are ... [more ▼]

Eurocode 3 Part 1-8 provides detailed application rules for the design of bolted end-plate connections. Although these rules apply to connections with any number of vertical bolt rows, most of them are limited to configurations with two bolts only in each horizontal row, i.e. one bolt on each side of the beam or column web. However, it is sometimes more economic to place four bolts in one row, for instance when wide flange H-sections are used. This configuration is commonly met in different countries in Europe and, in particular, in Germany where this configuration is even standardized. The theoretical model on which the Eurocode 3 application rules are founded is general and can be potentially applied to connections with four bolts per horizontal row. However, specific design rules are not given in Eurocode 3 and need to be developed. Within the present article, easy-to-apply analytical design rules aimed at predicting the mechanical properties of connections with four bolts per row, being in full agreement with the Eurocode 3 approach, are presented. In particular, comparisons to less recent analytical procedures are given. [less ▲]

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