References of "Odenbreit, Christoph 50002778"
     in
Bookmark and Share    
Full Text
Peer Reviewed
See detailNumerical study on the load bearing capacity of a steel U section beam used as a formwork in constrcution stage
Turetta, Maxime UL; Khelil, Abdelouahab; Odenbreit, Christoph UL et al

Scientific Conference (2018, September 05)

For many categories of buildings, the structural elements must be fire resistant to allow people to evacuate and firefighters to intervene. A new type of steel-concrete composite solution dedicated to ... [more ▼]

For many categories of buildings, the structural elements must be fire resistant to allow people to evacuate and firefighters to intervene. A new type of steel-concrete composite solution dedicated to steel building structures is under development to resist against this fire situation. The solution is composed of a steel U section acting as a formwork for a reinforced concrete part that provides the fire resistance. In order to keep the habits of steel construction, the solution is unpropped in construction stage and the concrete is casted on site. Thus the solution has to resist against three majors situations: the construction stage without propping, the exploitation stage and the fire situation. The steel part of the composite beam is then designed to face the construction stage without propping. The present paper describes the numerical investigations carried out on the load bearing capacity of this steel section in construction stage. The objective of these investigations is to finally propose a steel solution stable and resistant for its use during construction stage. The numerical model of the steel section and its boundary conditions are presented. A first elastic calculation is used to determine the Eigen modes of the beam that give the shape of initials imperfections. Then analysis considering materials non-linearity and geometrical imperfections (GMNIA calculation) are carried out. A sensitivity study on the influence of the geometrical imperfections on the load bearing capacity of the beam is performed. Then, with the more conservative initial imperfection, a study on the global stability of the beam without any intermediate restraint is carried out. Finally, to overcome the problem of instability in construction stage, the restraint induced by the perpendicular steel decks is investigated. [less ▲]

Detailed reference viewed: 65 (0 UL)
Full Text
See detailPush-out tests on demountable shear connectors of steel-concrete composite structures
Kozma, Andras UL; Odenbreit, Christoph UL; Braun, Matthias Volker UL et al

in Proceedings of the 12th International Conference on Advances in Steel-Concrete Composite Structures (2018, June 27)

The deconstruction of steel-concrete composite structures in buildings and the later separation of the materials is a labour- and cost intensive work. The shear studs are welded on the steel beam and ... [more ▼]

The deconstruction of steel-concrete composite structures in buildings and the later separation of the materials is a labour- and cost intensive work. The shear studs are welded on the steel beam and imbedded in the concrete deck and a large amount of cutting work becomes necessary. As a result, recycling is difficult and the potential for reusing entire elements is lost. The carbon footprint of composite structures could be decreased by application of the principles of “design for deconstruction and reuse”. This paper presents a desk top study and corresponding laboratory experiments on demountable shear connectors that facilitate recyclability and even provide the potential for reusing complete structural elements. In the Laboratory of Steel and Composite Structures of the University of Luxembourg 15 push-out tests have been carried out using different bolted connection systems suitable for multiple uses in order to verify their performance focusing on shear strength, stiffness, slip capacity, ductility and ability of demounting. The investigated systems included pre-stressed and epoxy resin injection bolts, solid slabs and composite slabs with profiled decking. The results showed that the tested demountable shear connections could provide higher shear resistance than conventional shear connections. The critical failure mode is shear failure of the bolts, while there was no visible damage observed on the connected members. Most of the tested connections could fulfil the ductility requirement according to by Eurocode 4. The application of epoxy resin in the hole clearance resulted in lower slip capacity. The outcome provides an important basis for the justification of the forthcoming enhancement and validation of numerical models of the demountable shear connections. The failure behaviour, the observed damages and the resulting ability of the elements for re-use are discussed in detail. [less ▲]

Detailed reference viewed: 140 (5 UL)
Full Text
Peer Reviewed
See detailDevelopment of an innovative type of shear connector dedicated to fully embedded steel-concrete composite columns - experimental and numerical investigations
Chrzanowski, Maciej UL; Odenbreit, Christoph UL; Obiala, Renata et al

in Proceedings of the ASCCS 2018 Conference, Valencia, Spain, June 27-29, 2018 (2018, June)

Detailed reference viewed: 33 (1 UL)
Full Text
Peer Reviewed
See detailFailure behaviour of silicone adhesive in bonded connections with simple geometry
Staudt, Yves UL; Odenbreit, Christoph UL; Schneider, Jens

in International Journal of Adhesion & Adhesives (2018), 82

In façade structures, adhesively bonded connections between glass panels and metallic substructures represent an attractive alternative to mechanical fixation devices. Apart from positive aspects ... [more ▼]

In façade structures, adhesively bonded connections between glass panels and metallic substructures represent an attractive alternative to mechanical fixation devices. Apart from positive aspects regarding the construction's energy efficiency and aesthetics, the uniform load transfer reduces stress concentrations in the adherends, which is beneficial especially regarding brittle materials like glass. Structural silicone sealants are generally used for these kind of applications due to their excellent adhesion on glass and their exceptional resistance against environmental influences and ageing. For the verification of the bonded connection, non-linear numerical simulations, such as the Finite Element Method, are increasingly used. The resulting three-dimensional stress states need to be assessed with the help of an appropriate failure criterion. In this paper, an overview is given on available failure criteria for rubber-like materials. The applicability of these criteria on the silicone sealant is verified regarding three characteristic stress states: uniaxial tension, shear and compression. The proposed engineering failure criterion is the true strain magnitude, which is valid for bonded connections in form of linear beads for cohesive failure of the adhesive. For Dow Corning® 993 structural silicone sealant, the strain magnitude, evaluated using true strains, at failure could be determined as 1.6. [less ▲]

Detailed reference viewed: 76 (7 UL)
Full Text
See detailNumerical evaluation of the plastic hinges developed in headed stud shear connectors in composite beams with profiled steel sheeting
Vigneri, Valentino UL; Odenbreit, Christoph UL; Braun, Matthias Volker UL

in Proceedings of the 12th International Conference on Advances in Steel-Concrete Composite Structures (2018)

Detailed reference viewed: 65 (7 UL)
Full Text
See detailNew mechanical model to predict the load bearing resistance of shear connectors with modern forms of profiled sheeting
Odenbreit, Christoph UL; Vigneri, Valentino UL; Amadio, Claudio et al

Scientific Conference (2018)

The rules in EN1994-1-1 concerning the resistance of shear connections in composite beams with headed shear studs and steel sheeting relies on push-out tests, which have been performed between the late ... [more ▼]

The rules in EN1994-1-1 concerning the resistance of shear connections in composite beams with headed shear studs and steel sheeting relies on push-out tests, which have been performed between the late seventies and the early nineties of the last century. In the recent years, new geometries of metal decking have appeared on the market with the target to reduce the volume and weight of the concrete slab and to maximise the slab efficiency. The influence of these new geometries on the load bearing behaviour of shear connections has to be verified. Amongst others, the RFCS research project DISCCO investigated the shear stud resistance in combination with such novel steel decking. It turned out that, the current EN 1994-1-1 rules need to be modified especially for metal decking with narrow and deep deck ribs. Alternative analytical equations for the estimation of the shear resistance have been derived and statistically evaluated according to EN 1990. Details are presented in this contribution. [less ▲]

Detailed reference viewed: 94 (23 UL)
Full Text
Peer Reviewed
See detailShear Stresses Analysis at the Steel-Concrete Interface with the Usage of Bond Eliminating Products
Chrzanowski, Maciej UL; Odenbreit, Christoph UL; Obiala, Renata et al

in Proceedings of the XI CMM 2017 Conference, Coimbra 23-24 November 2017 (2017, November)

Detailed reference viewed: 9 (1 UL)
Full Text
Peer Reviewed
See detailExperimental investigations on semi-continuous encased composite joints
Duarte Da Costa, Job UL; Obiala, Renata UL; Odenbreit, Christoph UL

in Eurosteel 2017 (2017, September 13)

The benefits brought to composite construction by the use of semi-continuous joints are well recognised and confirmed by the significant amount of research which has been performed in this area. It has ... [more ▼]

The benefits brought to composite construction by the use of semi-continuous joints are well recognised and confirmed by the significant amount of research which has been performed in this area. It has been analytically proven that at serviceability limit state (SLS) the performance of composite beams benefits from the use of semi-continuous composite joints [1]. At ultimate limit state (ULS) it is of common knowledge that the use of semi-continuous composite joints is only judicious in combination with the plastic hinge theory, which requires the verification of the rotation capacity of the joint. Despite all the effort done in this area, a concise and well-defined method to determine the rotation capacity of composite joints is lacking. Hence, a research programme with a large experimental part has been designed to investigate the behaviour of the connection between a column and a composite slim-floor beam subjected to a negative bending moment. It is the first time that the rotation capacity of an encased composite joint is analysed. The experimental campaign, presented in here, aims at determining the influence of each joint component on the rotation capacity of composite joints. Three test series have been performed; on boltless beam-to-column connections using variable longitudinal reinforcement ratio and bar diameter of the slab, on a bare bolted end-plate steel connection without reinforced concrete slab and finally on the encased composite joint with the complete bolted end-plate connection. This paper presents a detailed description of the tested specimen, shows the main results of the experimental investigations and gives an outlook on future work regarding this research project. The final goal of the research project is to develop a comprehensive methodology to predict the rotation capacity for traditional and slim-floor type of composite beams. [less ▲]

Detailed reference viewed: 79 (7 UL)
Full Text
Peer Reviewed
See detailMechanical Model to Predict the Resistance of the Shear Connection in Composite Beams with Deep Steel Decking
Odenbreit, Christoph UL; Nellinger, Sebastian UL

in Eurosteel 2017 (2017, September 13)

The resistance of a typical shear connection with headed shear studs in a composite beam is analysed in the normal case in accordance with EN 1994-1-1. The reducing effect of a trapezoidal metal decking ... [more ▼]

The resistance of a typical shear connection with headed shear studs in a composite beam is analysed in the normal case in accordance with EN 1994-1-1. The reducing effect of a trapezoidal metal decking onto the ultimate load bearing capacity is considered with empirically derived reduction factors and equations, which have been developed in the last century between the late 70th and the early 80th. The RFCS research project “DISCCO” investigated the shear stud resistance with novel types of steel decking. In many cases, the shear resistance, which was predicted by EN 1994-1-1 was not reached in tests. In the respective experiments with composite beams and deep decking, a concrete cone failure mode was identified and not a pure shear failure of the stud. This failure mode acted in combination with the load bearing capacity of the shear stud, which formed one or two plastic hinges in the shaft - depending on the available geometry. Based on these observations, new equations have been developed to predict the shear connection’s resistance with more accurcy. The yield hinge mechanism of the shear stud, which was developed by Lungershausen, was extended by the above mentioned load bearing component ‘concrete cone’. The formulae consider the geometry of the stud and the steel decking, the material strength of the stud and of the concrete material. The statistical evaluation of the developed equations shows a good accordance with test results. [less ▲]

Detailed reference viewed: 68 (5 UL)
Full Text
Peer Reviewed
See detailDevelopment of a new push test for Eurocode 4
Hicks, Stephen; Ciutina, Adrian; Odenbreit, Christoph UL

in 8th International Conference on Composite Construction in Steel and Concrete (2017, July 30)

The standard push test specimen in the current version of Eurocode 4 does not provide any information on what modifications should be made when profiled steel sheeting is introduced. Whilst the lack of ... [more ▼]

The standard push test specimen in the current version of Eurocode 4 does not provide any information on what modifications should be made when profiled steel sheeting is introduced. Whilst the lack of information was intended to encourage innovation, this has sometimes lead to test results implying that stud connectors possess a lower resistance and ductility than assumed in current Standards. From full-scale beam and companion push tests in Europe, it has been shown that modifying the push test through the introduction of a normal force to the face of the test slabs provides comparable load-slip performance to that encountered within a beam. Within the work programme for developing the second generation of Eurocodes, this paper presents part of the background to Sub-task 1 of SC4.T3, whose aim is to develop an improved push test for Eurocode 4 when stud connectors are welded within profiled steel sheeting. [less ▲]

Detailed reference viewed: 91 (2 UL)
Full Text
See detailSilicone sealants: A Finite Fracture Mechanics failure model for non-linear materials
Rosendahl, Philipp L.; Staudt, Yves UL; Odenbreit, Christoph UL et al

in 14th International Conference on Fracture (ICF 14) (2017, June)

A finite fracture mechanics failure model for hyperelastic silicone sealants is presented. The model is in very good agreement with simple shear tests of different adhesive joint geometries.

Detailed reference viewed: 97 (3 UL)
Full Text
Peer Reviewed
See detailInfluence of transverse loading onto push-out tests with deep steel decking
Nellinger, Sebastian UL; Odenbreit, Christoph UL; Obiala, Renata UL et al

in Journal of Constructional Steel Research (2017), 128

This paper presents the results of 20 push-out tests on shear stud connectors, placed centrally in the ribs of 58 mm and 80 mm deep steel decking. The tests were designed to investigate the realistic ... [more ▼]

This paper presents the results of 20 push-out tests on shear stud connectors, placed centrally in the ribs of 58 mm and 80 mm deep steel decking. The tests were designed to investigate the realistic load–slip behaviour of the shear connectors and the influence of transverse loading. The tests considered two different stud diameters and the effect of concentric and eccentric transverse loading. In addition, the influence of a second layer of reinforcement, thewelding procedure and the number of shear connectors in each rib have been considered. The observed influence of these parameters on the load–slip behaviour is presented and explained with regard to material properties and load-bearing models. In addition, the test results are compared with the current analytical approaches,which are shown to be non-conservative in some cases, because the presented deck shapeswere not well considered in the development and calibration of EN 1994-1-1. [less ▲]

Detailed reference viewed: 71 (0 UL)
See detailShear Connections in Composite Flexural Members of Steel and Concrete
Leskelä, M.; Aribert, J-M.; Ciutina, A. et al

Report (2017)

Detailed reference viewed: 175 (4 UL)
Full Text
Peer Reviewed
See detailShort-span composite beam tests to evaluate stud resistances
Nellinger, Sebastian UL; Eggert, Florian; Kuhlmann, Ulrike et al

in Proceedings of the Institution of Civil Engineers. Structures and Buildings (2017)

The results of a parametric study on ten short-span composite beam tests with small degrees of shear connection between 12 and 46% are presented. The beam tests were conducted using composite slabs with ... [more ▼]

The results of a parametric study on ten short-span composite beam tests with small degrees of shear connection between 12 and 46% are presented. The beam tests were conducted using composite slabs with two modern forms of profiled steel sheeting. Important parameters of the shear connection, such as stud diameter, number of studs per rib, reinforcement pattern, welding procedure and concrete strength, were varied. All the test configurations were selected in accordance with a previously conducted study on the behaviour of shear connectors in push-out specimens. A comparison of the bending resistance of the beam tests and the calculated plastic bending resistance is presented. The shear connector resistances were taken either from the push-out test results or from the analytical methods of Konrad, EN 1994-1-1 and Nellinger. Evaluation of the push-out and beam test results showed that the current shear connector resistances in EN 1994-1-1 insufficiently predict the observed concrete failure modes and resistances in the presence of modern forms of steel decking. New approaches to the shear connector resistance proposed by Konrad and Nellinger led to more accurate predictions of the shear resistance of headed studs and the plastic bending resistance of the composite beam tests. [less ▲]

Detailed reference viewed: 50 (2 UL)
Full Text
Peer Reviewed
See detailMechanical model to predict the resistance of the shear connection in composite beams with deep steel decking
Odenbreit, Christoph UL; Nellinger, Sebastian UL

in Steel Construction (2017), 10(3), 248-253

The resistance of a typical shear connection with headed shear studs in a composite beam is analysed for the normal case in accordance with EN 1994-1-1. The reducing effect of a trapezoidal metal decking ... [more ▼]

The resistance of a typical shear connection with headed shear studs in a composite beam is analysed for the normal case in accordance with EN 1994-1-1. The reducing effect of a trapezoidal metal decking to the ultimate loadbearing capacity is considered with empirically derived reduction factors and equations that were developed between the late 1970s and early 1980s. The RFCS research project ”DISCCO“ investigated the shear stud resistance with novel types of steel decking. In many cases, the shear resistance predicted by EN 1994-1-1 was not reached in tests. In the respective experiments with composite beams and deep decking, a concrete cone failure mode was identified and not a pure shear failure of the stud. This failure mode acted in combination with the loadbearing capacity of the shear stud, which formed one or two plastic hinges in the shaft depending on the actual geometry. Based on these observations, new equations have been developed to predict the shear connection's resistance with more accuracy. The yield hinge mechanism of the shear stud, which was developed by Lungershausen, was extended by the aforementioned loadbearing component ”concrete cone“. The formulae consider the geometry of the stud and the steel decking and the material strength of the stud and the concrete. The statistical evaluation of the equations developed demonstrates good agreement with test results. [less ▲]

Detailed reference viewed: 63 (6 UL)
Full Text
Peer Reviewed
See detailDesign of single-span beams for SLS and ULS using semi-continuous beam-to-column joints. Part 2: Composite beams with variable bending stiffness and joints according to EN 1993-1-8
Duarte Da Costa, Job UL; Braun, Matthias Volker UL; Obiala, Renata UL et al

in Steel Construction (2017), 10(2),

The objective of this article is to facilitate the use of semi-continuous joints by providing ready-to-use tables and charts for design, which also permit the benefits accruing from the use of semi ... [more ▼]

The objective of this article is to facilitate the use of semi-continuous joints by providing ready-to-use tables and charts for design, which also permit the benefits accruing from the use of semi-continuous composite beams to be directly identified. The relevant features for the design of composite beams, such as bending moment distribution, maximum deflection and natural frequency, are derived analytically. The influence of semi-continuous steel joints on the performance of single-span composite beams is analysed. The article concludes with an example of the use of a new slim-floor beam type – the composite slim-floor beam (CoSFB). The tables and charts derived are applied in this example with the intention of demonstrating the advantages of using semi-continuous joints in combination with composite beams. The present article extends the design of semi-continuous steel beams presented in the previous article on this subject. [less ▲]

Detailed reference viewed: 124 (11 UL)
Full Text
See detailNumerical simulation and Identification of the Failure Criterion for Structural Silicone
Staudt, Yves UL; Odenbreit, Christoph UL; Schneider, Jens

Speeches/Talks (2016)

In civil engineering, silicone sealants are widely used in structural sealant glazing applications as an adhesively bonded connection between the glass panels and the building substructure. The current ... [more ▼]

In civil engineering, silicone sealants are widely used in structural sealant glazing applications as an adhesively bonded connection between the glass panels and the building substructure. The current design concept does not take into account the actual stress state and the actual failure mechanism. Therefore, no information about the exact failure probability can be given. Alternative approaches, such as the Finite Element Analysis, also have major disadvantages due to the presence of singularities. Therefore, a method from Finite Fracture Mechanics, calibrated with experimental investigations on bulk material, is applied on silicone sealants, focusing on the shear failure mechanism. The procedure is validated using small scale tests such as simple shear and torsion tests. [less ▲]

Detailed reference viewed: 48 (3 UL)
Full Text
See detailMultiCoSteel – Structural Behaviour of Heavy Composite Columns with Multiple Encased Steel Profiles for High Rise Buildings
Chrzanowski, Maciej UL; Odenbreit, Christoph UL

Speeches/Talks (2016)

The PhD resesarch project“MultiCoSteel” is foussed on the investigation of the beam theory for composite columns with multiple encased steel profiles to find the correct internal stress distributions and ... [more ▼]

The PhD resesarch project“MultiCoSteel” is foussed on the investigation of the beam theory for composite columns with multiple encased steel profiles to find the correct internal stress distributions and stiffnesses. The suitability of the Euler-Bernoulli Theory will be investigated as well as the truss theory and the Vierendeel theory. A complex interaction between steel and concrete materials and lack of knowledge regarding composite behaviour opens opportunities to develop, improve and optimise the system and the design method. Within this research project both aspects will be handled with the objectives; 1) to develop the new, easy-applicable and efficient type of shear connector for an application in composite columns with multiple-encased steel profiles and 2) to prove the design hypothesis of Vierendeel mechanism behaviour. The project is running with close collaboration of industrial partner - ArcelorMittal and it was successfully qualified to the FNR AFR-PPP PhD Grant. [less ▲]

Detailed reference viewed: 46 (4 UL)