References of "Odenbreit, Christoph 50002778"
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See detailInvestigation of Bonded Connections with Silicone under Shear Loading
Staudt, Yves UL; Odenbreit, Christoph UL; Schneider, Jens

in Bos, Freek; Louter, Christian; Belis, Jan (Eds.) Challenging Glass 5 - Conference on Architectural and Structural Applications of Glass, Ghent, 16 & 17 June 2016 (2016, June 16)

In façade applications, structural sealant glazing systems with a soft adhesive like silicones show a number of advantages especially regarding brittle adherends like glass sheets, as stress ... [more ▼]

In façade applications, structural sealant glazing systems with a soft adhesive like silicones show a number of advantages especially regarding brittle adherends like glass sheets, as stress concentrations in the adherends are avoided due to the large bonding area and the uniform load transfer. The application guideline for structural sealant glazing systems (European Technical Application Guideline ETAG 002) defines a simplified design concept for the silicone sealant, leading to high safety factors and restrictions in use. The material behaviour of the silicone sealant can be more accurately described using the Finite Element Method and hyperelastic material laws, but the results for the stresses at the edge area for a shear dominated loading are highly mesh dependent, due to the presence of a singularity and thus hampering the assessment of the realistic stress distribution. In this paper, shear tests on bonded connections with silicone, referring to the ETAG 002, are presented. Beside the overlap length and adhesive thickness of the specimen prescribed by the standard, two more overlap lengths and thicknesses are tested. For the experimental investigations, the force-deformation behaviour and the failure initiation, observed at the edge area, are recorded. Unlike for the adhesive length, an influence of the specimen thickness on the failure shear strain could be observed and predicted by the numerical simulations. A clear difference between the maximum load and the load at failure initiation was observed. [less ▲]

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See detailInvestigation of hybrid steel-glass beams with adhesive silicone shear connection
Odenbreit, Christoph UL; Dias, Vincent UL

in Steel Construction (2016), 9(3), 207-221

Glass is used in current construction applications mostly as a façade element, its structural role being only rarely exploited, despite its significant resistance to in-plane compression. A steel-glass ... [more ▼]

Glass is used in current construction applications mostly as a façade element, its structural role being only rarely exploited, despite its significant resistance to in-plane compression. A steel-glass composite beam was built to investigate a hybrid steel-glass assembly and its loadbearing behaviour. To fulfil this objective, the existing types of steel-glass connection were evaluated, which allowed the possibilities offered by adhesive jointing to be highlighted. The selection of the adhesive, detailed in the present article, constituted a crucial aspect. An excessively soft connection does not transfer the shear loads between the glass and steel adherends, whereas an excessively stiff connection leads to failure of the glass. A two-component structural silicone was chosen and its properties were assessed with the help of an intensive test programme. As a result of this programme, a new quasi-incompressible hyperelastic material law was developed in order to represent the silicone elastomer behaviour. Numerical simulations were conducted in parallel to large-scale four-point bending tests on the adhesively bonded steel-glass composite beams. The aims were, on the one hand, to assess the bending stiffness of the steel-glass composite beam and, on the other, to validate the numerical simulations to conduct parametric studies. [less ▲]

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See detailDesign of single span beams in SLS and ULS using semi-continuous beam-to-column joints - Part 1: Beams with constant bending stiffness and joints according to EN 1993-1-8
Braun, Matthias Volker UL; Duarte Da Costa, Job UL; Obiala, Renata UL et al

in Steel Construction (2016), 9(1), 1-15

This article explains a method for determining how semi-continuous joints influence the deflection, natural frequency and bending moment distribution of single-span beams with constant inertia under ... [more ▼]

This article explains a method for determining how semi-continuous joints influence the deflection, natural frequency and bending moment distribution of single-span beams with constant inertia under uniformly distributed load. The method is adequate for simple hand calculations, allowing the structural engineer to assess potential savings already in the pre-design phase. Further, the economical potential of semi-continuous joints according to EN 1993-1-8 is demonstrated by an application example. [less ▲]

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See detailEarly-Stage Assessment for Office Buildings concerning thermal comfort , energy efficiency amd sustainabilty
Degens, Anja UL; Scholzen, Frank UL; Odenbreit, Christoph UL

in 14th International Building Simulation Conference BS 2015 (2015, December)

The building facade greatly influences energy demand, internal comfort and environmental quality of office buildings. This paper shows the influence of relevant design parameters for highly glazed systems ... [more ▼]

The building facade greatly influences energy demand, internal comfort and environmental quality of office buildings. This paper shows the influence of relevant design parameters for highly glazed systems. In detail constructive and technical measures have been evalutated to optimise light weight composite and solid structures in European climate. The structure type and the glazing share indeed have some influence on the energetic and thermal behaviour of the building but the influence of the ventilation strategy is significantly higher. However, in case of an adequate ventilation strategy, the structure type becomes more decisive if a thermal optimisation, especially a reduction of the over-heating risk, shall be achieved. [less ▲]

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See detailAnalyses of the loadbearing behaviour of deep-embedded concrete dowels, CoSFB
Braun, Matthias; Obiala, Renata UL; Odenbreit, Christoph UL

in Steel Construction (2015), 8(3), 167-173

The development of the “CoSFB-Betondübel” is presented in this paper. The “CoSFB-Betondübel” is a deep-embedded concrete dowel connecting in situ concrete with a steel section to assure composite action ... [more ▼]

The development of the “CoSFB-Betondübel” is presented in this paper. The “CoSFB-Betondübel” is a deep-embedded concrete dowel connecting in situ concrete with a steel section to assure composite action and thus allow for composite beam design. The loadbearing behaviour and parameters influencing this behaviour were determined through experimental tests. Special focus was given to the influence of the ratio of the resistance of the concrete dowel to the concrete compression class. The evaluation of the results concluded in a National Technical Approval [1]. Further investigations were performed via FE analysis in ABAQUS. Further, 3D models with non-linear material and geometry were prepared and validation undertaken. In addition, a real application example of CoSFB is shown. [less ▲]

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See detailDevelopment of an early-stage assessment tool for office buildings concerning comfort, energy efficiency and sustainability
Degens, Anja UL; Scholzen, Frank UL; Odenbreit, Christoph UL

in CISBAT 2015 - International Conference on Future Buildings & Districts Sustainability - from Nano to Urban Scale (2015, September)

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See detailInfluence of Semi-Continuous Composite Joints on the Natural Frequency and Deflection of Composite Beams
Duarte Da Costa, Job UL; Braun, Matthias; Odenbreit, Christoph UL

in ICASS'2015 International conference series on Advances in Steel Structures & IJSSD 2015 Symposium on Progress in Structural Stability and Dynamics (2015, July)

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See detailThe stress peak at the borehole of point-fitted IGU with undercut anchors
Tibolt, Mike UL; Odenbreit, Christoph UL

in Journal of Facade Design and Engineering (2015), 2(1-2), 33-66

The highest transparency in glass facades is obtained with point fitted glass units. Point fitted insulating glass units minimize thermal bridging and lead to glass facades with better energy efficiency ... [more ▼]

The highest transparency in glass facades is obtained with point fitted glass units. Point fitted insulating glass units minimize thermal bridging and lead to glass facades with better energy efficiency. Though, insufficient knowledge is present to offer a design method for point fittings in insulating glass. Therefore research has been carried out to extend the existing SLG-design-method (Linear superposition of local and global stress components) of Beyer for point fitted single and laminated glass to insulation glass units. This paper presents the first results of this research campaign. Load bearing tests on point fittings in single glazing have been conducted. A finite element model of the point fitting is calibrated by strain comparison. A test campaign for the deviation of a material law for silicone, used as secondary sealant in the edge seal system, is presented. The verified FE-model is implemented in a selected insulation glass unit, and the influence of the edge distance of the point fitting, as well as the edge bond stiffness and geometry on the stress peak at the borehole is investigated. In addition, the size of the so called ‘local area’ is adjusted for insulation glass units. [less ▲]

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See detailPush-out tests with modern deck sheeting and realistic transverse loading
Nellinger, Sebastian UL; Odenbreit, Christoph UL; Lawson, Mark

in 12th International Conference on Steel, Space & Composite Structures (2014, May)

The push-out test as proposed in EN 1994-1-1 originally was developed for solid slabs and not for composite slabs with additional steel sheeting. It leads to a load-slip behaviour of headed shear stud ... [more ▼]

The push-out test as proposed in EN 1994-1-1 originally was developed for solid slabs and not for composite slabs with additional steel sheeting. It leads to a load-slip behaviour of headed shear stud connectors which differs from the behaviour in the real beam. In particular, the vertical forces and negative bending moments of the composite slab at its support are ignored by this setup. Within the European research project “Development of improved shear connection rules in composite beams (DISCCO)” a total of 70 push-out tests was performed to investigate a more realistic push-out test setup. The influence of the transverse loading was investigated to develop a standard push-out test when additional steel sheeting is used. The test regime used to apply transverse loads in this investigation is described and the results of 10 push-out tests with 80 mm deep steel sheeting with pairs of 19 mm diameter headed shear stud connectors are presented. The observed bearing capacities of the shear connectors were over-predicted by the empirical reduction factor given in EN 1994-1-1 and the 6 mm criterion was not always satisfied, especially when no or only low transverse loads were applied. The application of transverse loads improved the ductility of headed shear stud connectors and the bearing capacity increased by up to 41%. [less ▲]

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See detailDevelopment of a constitutive hyperelastic material law for numerical simulations of adhesive steel–glass connections using structural silicone
Dias, Vincent UL; Odenbreit, Christoph UL; Scholzen, Frank UL et al

in International Journal of Adhesion & Adhesives (2014), 48

Silicone elastomers are amongst others employed in glass façades as structural connection materials. They are known to be durable adhesives, able to transfer forces under variable loading and atmospheric ... [more ▼]

Silicone elastomers are amongst others employed in glass façades as structural connection materials. They are known to be durable adhesives, able to transfer forces under variable loading and atmospheric conditions during their design life. For the dimensioning of adhesive joints, numerical simulations are often used, especially for joints which exhibit large deformations and/or for complex geometries. However, silicones have strong non-linear material behaviour already at small strain deformations, are slightly compressible and show a time-depending behaviour. The current existing material laws do not allow for considering these effects properly in simulation, particularly for combined loading. Therefore a hyperelastic material law for silicones has been developed and validated, based on a strain energy function. For this purpose, test series have been carried out to determine all relevant material parameters needed to describe the strain energy potential, namely tension, compression, shear and multi-axial oedometric test series on non-aged and artificially aged specimens. Furthermore, the softening due to low cyclic loading (Mullins’ effect) has been considered and quantified by comparison to quasi-static loading for all test series. The developed hyperelastic model has been implemented into the finite element software Abaqus® for validation and the results of numerical simulations have been compared to experimental results and existing laws. The comparison showed that the proposed model better matched the real behaviour of silicone elastomers and led to an increase in exactness of the numerical simulations of adhesive joints. [less ▲]

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See detailPush-out tests with modern deck sheeting to evaluate shear connector resistances
Eggert, Florian; Nellinger, Sebastian UL; Kuhlmann, Ulrike et al

in Eurosteel 2008, 7th European Conference on Steel and Composite Structures (2014)

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See detailCoSFB – Design and Application of a New Generation of Slim-Floor Construction
Braun, Mathias; Obiala, Renata UL; Odenbreit, Christoph UL et al

in 7th European Conference on Steel and Composite Structures (Eurosteel) (2014)

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See detailInvestigation of the material behaviour of bonded connections with silicone
Staudt, Yves UL; Schneider, Jens; Odenbreit, Christoph UL

in Schneider, Jens; Weller, Bernhard (Eds.) engineered transparency. International Conference at glasstec - Glass | Facade | Energy (2014)

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See detailAnalytical extension of a climate load model for undercut point fitted IGU
Tibolt, Mike UL; Hechler, Oliver UL; Odenbreit, Christoph UL

in Louter, Christian; Bos, Freek; Belis, Jan (Eds.) et al Challenging Glass 4 & COST Action TU0905 Final Conference (2014)

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See detailLatest development in steel and glass engineering
Odenbreit, Christoph UL

Presentation (2013, November 27)

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See detailInnovative conception and design of structural systems for flexible floor spaces
Odenbreit, Christoph UL; Hechler, Oliver UL; Braun, Matthias

in ICSA2013 - Conference book (2013, July)

The pressure in the market of high-rise and multistory office buildings is stimulating innovative solutions for the design of structural systems fulfilling the demand for flexible, sustainable floor ... [more ▼]

The pressure in the market of high-rise and multistory office buildings is stimulating innovative solutions for the design of structural systems fulfilling the demand for flexible, sustainable floor layouts. Steel-concrete composite constructions do comply with related challenges. They offer a wide range of structural solutions to design economic, efficient and sustainable buildings. New composite slabs with sheets of up to 220 mm height are able to span up to 9 m without any intermediate support. These sheets can further be placed on the lower flange of the steel beam to reduce the slab thickness in order to build a "Slim-Floor System". By activating composite action for slim-floor beams due to recent innovations grid spans of about 10 x 14 m are enabled, permitting a huge flexibility in the architectural floor layout. Further the design of composite connection provides significant potential for structural optimization. This potential is outlined and design guidance for simplified and sustainable composite design is given. [less ▲]

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

in CSSC VII - book (2013, July)

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 connections 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 detailExperimental investigations and numerical modeling of point-fitted glass panes
Tibolt, Mike UL; Odenbreit, Christoph UL; Hechler, Oliver UL

in ICSA2013 - Conference book (2013, July)

The highest transparency of façades is to be obtained by the use of point-fitted glass units. To comply with the demand for energy efficiency the use of insulating glass units is required. However ... [more ▼]

The highest transparency of façades is to be obtained by the use of point-fitted glass units. To comply with the demand for energy efficiency the use of insulating glass units is required. However, insufficient knowledge is present for point fittings in insulating glass which is a drawback of this kind of construction. Therefore research has been carried out to extend an existing design-method, the SLG-method, to insulating glass. In this paper, first, experimental investigations in point-fitted single glass units and the results are presented. Secondly, a numerical model is introduced which has been calibrated to this test data. This model will subsequently be extended to other geometries and the stress peaks at the borehole as well as the size of the local area for the SLG-method will be determined. Therefore this paper presents the preparation process for the application of the SLG-method for insulation glass units. [less ▲]

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See detailDetermination of the material properties of an epoxy and MS-polymer for adhesive point-fixings
Dispersyn, Jonas; Belis, Jan; Dias, Vincent UL et al

in COST Action TU0905 book (2013, April)

Adhesive point-fixings are being used more frequently because of their numerous advantages compared to traditional bolted connections, such as a better load introduction, the absence of drilling holes in ... [more ▼]

Adhesive point-fixings are being used more frequently because of their numerous advantages compared to traditional bolted connections, such as a better load introduction, the absence of drilling holes in the glass and increased thermal performances. For the analysis of such fixings the use of finite element analyses is necessary. The adhesive properties in these finite element analyses are presented on the basis of stress-strain curves. The determination of the stress-strain curves is done by experimental testing on bulk material of the adhesive. With these tests the displacement rate reliance can also be studied. In this contribution, the fabrication and testing of test samples is described for two selected adhesives. The experimental data show that the selected adhesives behave stiffer under tension as the displacement rate is decreased. [less ▲]

Detailed reference viewed: 106 (9 UL)