Hagen am Teuteburger Wald, Germany
Hagen am Teuteburger Wald, Germany

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Stihl T.,Eiffel Deutschland Stahltechnologie GmbH | Chassard C.,Landesbetrieb fur Strassenbau | Feldmann M.,RWTH Aachen | Bild S.,Beratender Ingenieur
Stahlbau | Year: 2013

The 1951-built suspension bridge spanning the river Saar at Mettlach, Germany needed to be closed for vehicles more than 12 t because of defects in the cable structure and damage of the composite bridge deck. So that the preservation listed urban bridge will meet again the existing traffi c conditions, the bridge deck had to be replaced and lightened. Through the installation of a light steel roadway in SPS design it is possible to allow the traffi c over the bridge without restrictions again. The paper describes the advantages of the new technology built Sandwich Plate bridge deck compared to traditional construction methods. The decision to award the construction works and contents of the individual approval are presented. The procedure and features in the use of this technology not yet introduced in Germany are given. The realization concept proposed by the construction company is an innovative example of current development in steel construction. The concept is based on the 2010 roadway rehabilitation of the Dawson Bridge in Canadian Edmonton which won the Sustainability Award 2012 of CISC. For application in Mettlach additional development was required to meet the regulations of the DIN Fb 101 and 103 in accordance to the standards of fatigue.


The lane in the overhead railway viaducts of the underground line U2 in the Schönhauser avenue in Berlin consists - as at many other similar engineering structure: in Berlin, e. g. the Yorckbrücken - of crushed stone-filled buckled plates, on which the tracks with cross sills were installed. This construction worked satisfactorily in metropolitan railway traffic for over one hundred years. In the context of the redevelopment of the overhead railway viaducts including their bridge bearings -over this in a later issue this journal will have to be reported also the lane should be complete renewed. The thought to the installation of a deckinglane was not continued to pursue, but the proven solution with the crushed stone-filled buckled plates the preference given. As special challenge the production of buckled plates turned out in different dimensions. Welded structures, like even reinforced steel sheets (similarly orthotropic plates) were ruled out for reasons of the monument protection. The original manufacturing process by dies was not possible because of the very large number the one which can be reproached different die forming from economic reasons. The new buckled plates in the same different dimensions could be manufactured by a new and patent protected procedure as the original plates considering the monument protection and economically. With the installation into the likewise reorganized sub-construction the rivet joint was replaced by high-tensile bolts. In the report above all the production and the installation of the buckled plates into the viaduct construction are described. © Ernst & Sohn Verlag für Architektur und technische Wissenschaften GmbH & Co. KG, Berlin.


It is shown how simply the moment capacity in lateral buckling of straight girders with bi- or mono-symmetric crosssection can be predicted with help of the plastic hinge rotation of the compression flange in good coincidence with experiments on large specimens. © Ernst & Sohn Verlag für Architektur und technische Wissenschaften GmbH & Co. KG, Berlin.


Mikat H.,Hessenwasser GmbH and Co. KG | Wagner H.,Hessenwasser GmbH and Co. KG | Roth U.,Beratender Ingenieur
GWF, Wasser - Abwasser | Year: 2010

The joint project "adaptation strategies for climate trends and extreme weather and steps towards a sustainable groundwater management" contains a prognosis of drinking water demand up to the year 2100. The prognosis of water demand is based on prognoses of the developments of population and percapita-consumption. The resulting twelve variants of the prognosis are reduced to three scenarios for relevant categories of developments. Two moderate scenarios show the status quo and a slightly decreasing demand. In the third scenario a considerable decrease is assumed. The prognosis shows the development in normal years - the situation in future periods of dry years also due to climate change is analysed separately.


Roth U.,Beratender Ingenieur | Mikat H.,Beratender Ingenieur | Wagner H.,Hessenwasser GmbH and Co. KG
GWF, Wasser - Abwasser | Year: 2011

The joint project "adaptation strategies for climate trends and extreme weather and steps towards a sustainable groundwater management" includes a prognosis of water consumption up to 2100. As a basis for the prognosis the development of water demand for different purposes was analysed. The special subject of this article is the effect of modern water saving household appliances. The consequences have been taken effect between 1980 and 2010 and to a large extent they are complete.


Rug W.,Beratender Ingenieur
Bautechnik | Year: 2016

Innovations in the timber-frame construction - The wooden hall construction of the company Christoph and Unmack/Niesky At the beginning of the 20th century courageous carpenters, wood construction companies, architects and engineers developed the timber construction to a powerful construction method. To preserve the remaining buildings of this period the knowledge of the constructive and technical development is essential. In this publication the author gives a report on the hall buildings of the company Christoph and Unmack. © 2016 Ernst & Sohn Verlag für Architektur und technische Wissenschaften GmbH & Co. KG, Berlin.


It is shown how simply the ultimate capacity of arbitrary arches can be predicted in good coincidence with in situ measurements, even without computer, if the plastic hinge rotation and the resistances of the construction materials are known. © Ernst & Sohn Verlag für Architektur und technische Wissenschaften GmbH & Co. KG.

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