Feedback

Faculté des Sciences appliquées
Faculté des Sciences appliquées
MASTER THESIS
VIEW 47 | DOWNLOAD 186

Behaviour of steel joints under dynamic actions

Download
Golea, Tudor ULiège
Promotor(s) : Jaspart, Jean-Pierre ULiège ; Demonceau, Jean-François ULiège
Date of defense : 25-Jun-2020/26-Jun-2020 • Permalink : http://hdl.handle.net/2268.2/9101
Details
Title : Behaviour of steel joints under dynamic actions
Translated title : [en] Behaviour of steel joints under dynamic actions
Author : Golea, Tudor ULiège
Date of defense  : 25-Jun-2020/26-Jun-2020
Advisor(s) : Jaspart, Jean-Pierre ULiège
Demonceau, Jean-François ULiège
Committee's member(s) : Denoël, Vincent ULiège
Corman, Adrien ULiège
Aldea, Alexandru 
Language : English
Number of pages : 76
Discipline(s) : Engineering, computing & technology > Civil engineering
Target public : Student
Institution(s) : Université de Liège, Liège, Belgique
Degree: Master en ingénieur civil des constructions, à finalité spécialisée en "civil engineering"
Faculty: Master thesis of the Faculté des Sciences appliquées

Abstract

[en] The extensive use of steel framed structures as a solution for fast, efficient and well-controlled
construction process has stimulated the research on the behaviour of steel connections under
static and seismic loading regimes. Nonetheless, there is a limited amount of knowledge around
the response of steel joints subjected to transient dynamic loads. Exceptional loading situations
due to explosions or impact can lead to the failure of structural elements directly exposed or in
the proximity of the loading source. When a joint between two or more structural elements has
failed, potential progressive collapse of the structure may occur as a result of the propagation
of initial failures. Therefore, to make the built environment safe, it is important to evaluate
accurately the resistance capacities and ductility of steel joints.
Current design standards provide a very limited guidance for the design of joints subjected
to transient loads, mainly due to the lack of investigations conducted on this topic. The present
thesis addresses these aspects by exploring several methods of assessment of the joints nonlinear
response under quasi-static and impact loading. Experimental, analytical and numerical
approaches are employed to predict the observed real behaviour of steel connections. The analytical
and numerical procedures are validated against tests results available from the experimental
campaign conducted within the research project RobustImpact.
More than 20 specimens of double-sided beam-to-column joint configurations were tested
under quasi-static and dynamic loading regimes. The analytical procedures used for the characterisation
of the behaviour of steel joints under monotonic loads tend to estimate accurately the
response experimentally observed. A specific limitation of the analytical model implemented in
Eurocde 3 has been highlighted in this study. For static conditions, the equivalent T-stub model
is likely to underestimate the ultimate resistance capacity when it is used for components with
thin plates.
The FE modelling techniques allow for the accurate simulation of the response of steel joints
under both static and impact loading scenarios. Within the framework of this thesis several FE
models that incorporate the material rate sensitivity were developed and validated against experimental
results. A good agreement between the simulations and the physical tests results was
obtained. The strain rate effects expressed in terms of Dynamic Increase Factors were quantified
relying on two assessment methods - analytical and numerical.
The analytical method used for the estimation of maximum impact forces leads to generally
accurate predictions. Consequently, this method is used for the estimation of strain rate effects.
The values found for the DIFs were in partial-to-good agreement with the ones estimated from
the FE results, allowing for the identification of basic active components mostly susceptible to
be affected by the deformation rate.


File(s)

Document(s)

File
Access Behaviour_of_steel_joints_under_dynamic_actions_Golea_2020.pdf
Description: -
Size: 7.77 MB
Format: Adobe PDF

Annexe(s)

File
Access Summary_Golea_2020.pdf
Description: -
Size: 41.97 kB
Format: Adobe PDF

Author

  • Golea, Tudor ULiège Université de Liège > Master ingé. civ. constr., fin.

Promotor(s)

Committee's member(s)

  • Denoël, Vincent ULiège Université de Liège - ULiège > Département ArGEnCo > Analyse sous actions aléatoires en génie civil
    ORBi View his publications on ORBi
  • Corman, Adrien ULiège Université de Liège - ULiège > Département ArGEnCo > Adéquat. struct. aux exig. de fonct.& perfor. techn.-écon.
    ORBi View his publications on ORBi
  • Aldea, Alexandru
  • Total number of views 47
  • Total number of downloads 186










All documents available on MatheO are protected by copyright and subject to the usual rules for fair use.
The University of Liège does not guarantee the scientific quality of these students' works or the accuracy of all the information they contain.