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See detailHITUBES - Design and integrity assessment of high strength tubular structures for extreme loading conditions - Final report
Bursi, Oreste; Kumar, Anil; Demofonti, Giuseppe et al

Report (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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See detailATTEL PROJECT - PERFORMANCE-BASED APPROACHES FOR HIGH STRENGTH TUBULAR COLUMNS AND CONNECTIONS UNDER EARTHQUAKE AND FIRE LOADINGS - D3
Zilli, Giuliana; Demofonti, Giuseppe; Ferino, Jan et al

Report (2012)

- D3.1: monotonic and cyclic test data on base-joint specimens; - D3.2: monotonic and cyclic test data on column specimens; - D3.3: monotonic and cyclic test data on beam-to-column joint specimens; - D3.4 ... [more ▼]

- D3.1: monotonic and cyclic test data on base-joint specimens; - D3.2: monotonic and cyclic test data on column specimens; - D3.3: monotonic and cyclic test data on beam-to-column joint specimens; - D3.4: cyclic test results laboratory report. [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

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See detailRobustness of car parks against localised fire - Draft Final Report
Demonceau, Jean-François ULg; Huvelle, Clara ULg; Coméliau, Ludivine ULg 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

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See detailResistance tables for standardized joints in accordance with EN 1993-1-8
Weynand, Klaus; Oerder, Ralf; Demonceau, Jean-François ULg

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

Publications containing resistance tables for joints in steel structures have been published in the last decades in various European countries. However, most of those publications provide joint ... [more ▼]

Publications containing resistance tables for joints in steel structures have been published in the last decades in various European countries. However, most of those publications provide joint resistances according to the design rules of national standards or according to the ENV version of Eurocode 3. The present paper refers to two new publications containing resistance tables in accordance with the new Eurocode 3 Part 1.8 (EN 1993-1-8). One of these two publications is devoted to joints with open sections including simple joints and moment resistant joints. One type of connection, traditionally used in Germany, but more and more also used in other European countries, is the end-plate connection with four bolts in a horizontal row. This connection type is not directly covered by Eurocode 3. The paper describes briefly the design model for this specific type of connection which is fully in accordance with the design methods of Eurocode 3. The second publication is of particular interest for practitioners because it is the first design tool dealing with hollow section joints in lattice structures. The paper discusses the practical impact of such resistance tables and it reports on some observations using the Eurocode 3 design rules for hollow section joints. [less ▲]

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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)

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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)

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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: 67 (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)

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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 detail“State-of-problem report prepared for the TC11 meeting held in Valencia on October 2012”
Demonceau, Jean-François ULg; Hjiaj, Mohammed; Aribert, Jean-Marie et al

Report (2012)

The present document summarises recent studies and developments investigating the behaviour of composite frames, for discussion within TC11 Committee. Also, possible aspects to be investigated in future ... [more ▼]

The present document summarises recent studies and developments investigating the behaviour of composite frames, for discussion within TC11 Committee. Also, possible aspects to be investigated in future are identified. The document is organised as follows: • First, the global frame behaviour is considered in § 2; • Then, the structural members which can be met in a composite structure, i.e. the composite slabs, the composite beams, the composite columns and the composite joints, are considered in separate paragraph from § 3 to § 6; • A specific paragraph is also dedicated to the possible long term effects on composite members (§ 7); • Finally, a conclusion is drawn in § 8, summarising recent improvements in the knowledge about composite frame design and possible further developments. A first draft of this document was presented at the TC11 meeting held in Liège on March 2010. The present document is an updated draft to be discussed at the TC11 meeting held in Valencia on october 2012. Remark: the aspects related to the response of composite structures subjected to seismic or fire actions are not reported here as they are covered by other more “transversal” technical committees of ECCS (TC3 for the fire and TC13 for the seismic action). [less ▲]

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See detailHITUBES PROJECT DESIGN AND INTEGRITY ASSESSMENT OF HIGH STRENGTH TUBULAR STRUCTURES FOR EXTREME LOADING CONDITIONS - D3
Rivera, Sergio; Alvarez, Ricardo; Lezcano, Ricardo et al

Report (2012)

D3.1: Mechanical, toughness and corrosion properties for HSS employed in this study. D3.2: Cyclic test data of tubular (cylindrical) members or member assemblies D3.3: Buckling test data of tubular ... [more ▼]

D3.1: Mechanical, toughness and corrosion properties for HSS employed in this study. D3.2: Cyclic test data of tubular (cylindrical) members or member assemblies D3.3: Buckling test data of tubular (cylindrical) members or member assemblies [less ▲]

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See detailHITUBES PROJECT DESIGN AND INTEGRITY ASSESSMENT OF HIGH STRENGTH TUBULAR STRUCTURES FOR EXTREME LOADING CONDITIONS - D8
Bursi, Oreste S.; Kumar, Anil; Demonceau, Jean-François ULg

Report (2012)

D8.1: Evaluation of the results of the SWOT analysis. D8.2: Evaluation of the results of the monitoring activity.

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See detail300e conférence du C.E.R.E.S
Courard, Luc ULg; Dehousse, Nicolas ULg; Demonceau, Jean-François ULg et al

Book published by Centre d'Etudes, de Recherches et d'Essais Scientifiques du Génie Civil (2011)

Cette brochure comprend: le mot du président, un historique du CERES, la liste des bulletins, mémoires et conférences du CERES depuis ses origines jusqu'à ce jour, la liste des présidents, secrétaires et ... [more ▼]

Cette brochure comprend: le mot du président, un historique du CERES, la liste des bulletins, mémoires et conférences du CERES depuis ses origines jusqu'à ce jour, la liste des présidents, secrétaires et trésoriers, un mot de conclusions, ainsi que le programme de la manifestation organisée à l'occasion de la trois centième conférence du CERES. [less ▲]

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See detailFire tests made for the ATTEL RFCS research project
Franssen, Jean-Marc ULg; Dumont, Fabien ULg; Wellens, Eric ULg et al

Conference given outside the academic context (2011)

The ATTEL project (Performance-Based approaches for high strength tubular columns and connections during earthquake and fire loadings) aims at developing performance-based design approaches where the ... [more ▼]

The ATTEL project (Performance-Based approaches for high strength tubular columns and connections during earthquake and fire loadings) aims at developing performance-based design approaches where the capacity design of steel grades up to S690 and S700MC – widely used in seismic engineering to avoid brittle failure and ensure ductile behaviour – will be extended to high strength steel circular hollow section structures to prevent failure and collapse under both earthquake and fire loading. Within this research projects, fire resistance tests have been performed on 4 columns, 4 beam-to-column joints and 3 column bases. The main features and results of these tests are presented here. [less ▲]

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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 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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