References of "Hahn, Christoph"
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See detailDie Autoindustrie in der Großregion SaarLorLux 2011 - aktuelle Entwicklungen, Herausforderungen und Lösungsansätze
Hahn, Christoph; Pauly, Michel UL; Caruso, Geoffrey UL et al

E-print/Working paper (2011)

Mit rund 150 000 Beschäftigten und mehr als 600 Unternehmen zählt die Automobilindustrie zu den wichtigsten Wirtschaftszweigen in der Großregion. In der jüngeren Vergangenheit haben allerdings die ... [more ▼]

Mit rund 150 000 Beschäftigten und mehr als 600 Unternehmen zählt die Automobilindustrie zu den wichtigsten Wirtschaftszweigen in der Großregion. In der jüngeren Vergangenheit haben allerdings die Globalisierung, technologischer Wandel und vor allem die globale Wirtschafts- und Finanzkrise die Branche stark beeinflusst und vor große Herausforderungen gestellt. Der Beitrag versucht, diese Entwicklungen nachzuzeichnen und mögliche Strategien und Maßnahmen zu diskutieren, mit denen auf die Herausforderungen reagiert werden kann. Dieser Beitrag ergänzt den vor der Wirtschaftskrise von 2008 geschriebenen Beitrag Autoindustrie 2007 von C. Schulz, P. Dörrenbächer und H. Pansch. Die beiden Karten zeigen die Betriebe der Autohersteller und ihrer Zulieferer mit mindestens 500 Arbeitsplätzen in den Jahren 2007 (C. Schulz/P. Dörrenbächer/H. Pansch) und 2011 (C.K. Hahn) im Vergleich, also kurz vor bzw. nach der 2008 ausgebrochenen Finanzkrise. [less ▲]

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See detailUntersuchungen über das Trag-und Dehnungsverhalten des Betongurtes bei Verbundanschlüssen
Odenbreit, Christoph UL; Jaspart, Jean-Pierre; Hahn, Christoph

in Stahlbau (2009), 78(1), 35-41

Due to the rising cost pressures in the construction industry, it is particularly important to choose efficient design methods to achieve economic structures. The use of the plastic hinge theory may lead ... [more ▼]

Due to the rising cost pressures in the construction industry, it is particularly important to choose efficient design methods to achieve economic structures. The use of the plastic hinge theory may lead to good results within the steel and composite construction industry because cross section- and system reserves can almost fully used. This means for the normal composite beam a redistribution of the bending moment from the support section to the field section. This redistribution causes an increase of the rotation at the composite connection. The presented tests show the influence of the reinforcement (type of reinforcement and reinforcement ratio) to the rotation capacity of the connection. The increased rotation requirements of composite connections in the area of plastic hinges should already be take in to account at planning state. [less ▲]

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See detailCorrelation between stiffness of composite connections and adjacent composite beam
Odenbreit, Christoph UL; Hahn, Christoph

in 2nd International Symposium on Connections between Steel and Concrete (2007)

In the last years composite structures got more and more important for office as well as high rise buildings. Many test programs where started to study the load bearing behavior of these structures. This ... [more ▼]

In the last years composite structures got more and more important for office as well as high rise buildings. Many test programs where started to study the load bearing behavior of these structures. This paper concentrates on the stiffness behaviour of composite connections, the connecting link between beams or column and beam. The presented analysing model aims in determining the stiffness of composite connections in a practical manner. Therefore a new variable – the non-dimensional spring stiffness – is introduced. The non-dimensional stiffness is a characteristic value for one kind of composite connections, for example joints with endplates or joints with fins. The determination of the non-dimensional stiffness is based on the evaluation of 59 test results. [less ▲]

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See detailBending Resistant Composite Joints for High Rotation Capacity
Odenbreit, Christoph UL; Hahn, Christoph

in Responding to Tomorrow's Challenges in Structural Engineering (2006)

In the last years mixed structures in steel and concrete gain more and more importance. These structures combine the advantages of steel constructions with the advantages of the concrete. The typical slab ... [more ▼]

In the last years mixed structures in steel and concrete gain more and more importance. These structures combine the advantages of steel constructions with the advantages of the concrete. The typical slab construction for those buildings insists in a concrete slab, which is carried by a steel beam. Both elements together result in the composite beam. The composite beam is connected to the column with the composite connection. The presented analysing model is valid for fixed, pinned and even for semi-rigid composite connections. It is related to the model by the study group COST C1. The Model helps to determine computational values for the stiffness, the load-carrying capacities and the rotation ability of composite joints. The model is based on the evaluation of 56 experiments at composite connections. [less ▲]

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