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Stuttgart Mühlhausen, Germany

Rohm C.,Herrmann und Partner GmbH | Novak B.,University of Stuttgart | Karusala R.,CSIR - Central Electrochemical Research Institute | Sasmal S.,CSIR - Central Electrochemical Research Institute
Beton- und Stahlbetonbau | Year: 2013

The present paper discusses the behaviour of fibre reinforced concrete (FRC) beam column joints under cyclic loading carried out as an Indian-German collaborative research project. To avoid reinforcement congestion in the joint region without compromising performance, FRC is found to be extremely potential. Addition of steel fibres would lead to improved strength, energy dissipation capacity and integrity inside the joint. Moreover an alternate reinforcement detailing has been developed to move the plastic hinge in the beam region. First, the positive effects of using FRC are discussed followed by the experimental studies. Strength of beam column joints using FRC was experimentally evaluated to ensure that they are strong enough to produce a failure in the beam at a predetermined distance away from the column face. The test results showed the beneficial effect of FRC on energy dissipation and joint integrity. Further, the results obtained from both numerical and analytical studies in terms of strength and failure mechanism are in good aggreement with those obtained from the experimental studies. The paper concludes with recommendations to design the beam column joint and to shift the plastic hinge in the beam region. Copyright © 2013 Ernst & Sohn Verlag für Architektur und technische Wissenschaften GmbH & Co. KG, Berlin. Source

The idea to analyse processes of movement by means of dynamic strut-and-tie models is based on the vectorial force flow analysis of static problems but expands its application to complete dynamic processes. A strut-and-tie model is a vectorial analysis of layouts and polygons of forces carried out graphically for each knot of a system. If the layout of the polygon of forces is closed, the knot analysed is in static equilibrium. If the polygon of forces is not closed, the knot will be accelerated by the resulting force depending on its mass. Analysing dynamic processes in building design does not only play an important role in case of human-made vibrations or structural vibrations caused by earthquakes or wind. In addition to the usual problems a dynamic analysis may be carried out if the whole construction or individual components of the structure lose stability. If that happens, the internal forces of the structure come into a flow and the whole system or parts of it can possibly become kinematic. The following movement keeps going until the structure comes into a new static equilibrium with a new geometry. © 2015 Ernst & Sohn Verlag für Architektur und technische Wissenschaften GmbH & Co. KG, Berlin. Source

Herrmann A.,Herrmann und Partner GmbH | Dietz M.,Herrmann und Partner GmbH | Lerner B.,Herrmann und Partner GmbH | Kalmbach R.,Herrmann und Partner GmbH
Beton- und Stahlbetonbau | Year: 2013

The building plot for the new construction and remodeling of Heidelberg's theater is located in the inner city area. It is bordered by adjacent buildings on its northern side, by the two streets Theaterstraße and Friedrichstraße on its eastern and western side and a public walkway on its southern side. Before starting the new construction, the not listed parts of the existing theater had to be demolished. The remaining parts along Theaterstraße and Friedrichstraße have been conserved for the continued use of the theater. Copyright © 2013 Ernst & Sohn Verlag für Architektur und technische Wissenschaften GmbH & Co. KG, Berlin. Source

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