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Karlsruhe, Germany

Thumernicht S.,Baubevollmachtigter | Jacob K.,KREBSKIEFER Ingenieure GmbH
Bautechnik | Year: 2015

Since 2005 the federal government is realising reinstatement work on the locks of the Oder-Spree-Channel to provide a sustainable connection for the most important industrial and commercial locations along the Spree-Oder-Waterway (SOW) to the trans-european inland waterway. Part of this project is an increase of the usable chamber length each from 57 m up to 115 m. The more than 100 years old "Nordkammer Schleuse Kersdorf" (northern part of the lock in Kersdorf) has been reconstructed and elongated with a sheet piling construction. In this process the goal to keep the existing width of the chamber at 9.8 m throughout the new length of the construction was achieved. The given report should provide insights of the planning, testing and realisation of the construction project. Hence, special features will be outlined which challenge the building-owner as well as the contractor, by being typical for actions in the preservation of infrastructure in existing constructions. This project was completed in 2013 and required overall costs in the amount of approximately 14 million euros. Principal was the Wasserstraßen-Neubauamt Berlin. Copyright © 2015 Ernst & Sohn Verlag für Architektur und technische Wissenschaften GmbH & Co. KG, Berlin.

Retzepis L.,KREBSKIEFER Ingenieure GmbH
IABSE Conference, Geneva 2015: Structural Engineering: Providing Solutions to Global Challenges - Report | Year: 2015

In the past decades much progress has been made in Germany in the field of sustainable bridge design due to limited natural und financial resources. In 2011 a new regulation for the recalculation of highway bridges, the so called "Nachrechnungsrichtlinie", was enforced, which accurately defines the steps to be achieved and includes sustainable aspects. The basis of the new regulation is a three block strategy. It starts with calculations of the structure taking into account the results of the former bridge investigations and all available data, continues with a feasibility study and ends with a cost-efficiency study. This procedure leads to sustainable bridge design in Germany.

Akkermann J.,KREBSKIEFER Ingenieure GmbH | Hewener A.,KREBSKIEFER Ingenieure GmbH
Beton- und Stahlbetonbau | Year: 2015

The world's third largest mosque, whose prayer hall is designed for up to 32 000 believers, is presently under construction. Following the architectural idea of a high transparency inside the hall, a special three-dimensional stiffening system without inner shear walls or bracings was designed. Northern Algeria is a strong motion area. To assure the structural safety of the monumental building a seismic isolation with sliding- isolation-pendulum was chosen. Furthermore fluid viscous dampers were arranged to reduce the earthquake displacements. The article describes the earthquake design and the related calculations and presents the specialties in the design codes concerning the planning, the tender documents and the execution of the constructions according to European codes (EN). © Ernst & Sohn Verlag für Architektur und technische Wissenschaften GmbH & Co. KG.

Akkermann J.,KREBSKIEFER Ingenieure GmbH | Constantinescu D.,KREBSKIEFER Ingenieure GmbH | Hewener A.,KREBSKIEFER Ingenieure GmbH
Bautechnik | Year: 2015

The world's third largest mosque, whose minaret will be the highest in the world, is currently under construction in Algiers. A new urban focus will be created by the complex. Due to the monumental importance of the building, the durability requirements were extremely high. As Algiers is located in a strongmotion earthquake area, the structural design of the buildings followed latest concept and construction methods. The prayer hall will be totally decoupled from the seismic ground by isolators and dampers. The minaret will be a high rise building with a composite structure of RC cores with integrated steel members that are coupled by steel bracings in the fac¸ade. Its design was made by means of special pushover-analyses. The construction started in 2012 and is scheduled to be finished in 2016. The paper presents the outstanding project and its main structural design aspects. © Ernst & Sohn Verlag für Architektur und technische Wissenschaften GmbH & Co. KG.

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