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Van Dornick B.,Bundesministerium fur Verkehr | Wehner-Heil A.,Bundesanstalt fur Strassenwesen
Natur und Landschaft | Year: 2013

Federal highways represent a highly de-veloped linear transport infrastructure. Highly frequented highways consisting of more than two lanes are usually strong barriers to wildlife. In contrast to other effects of roads it is possible to mitigate fragmentation effects by use of special built structures such as ecoducts, green bridges or underpasses. A 'Federal De-fragmentation Programme' has been adopted by the German government. The German federal states (Lander) are now requested to investigate opportunities for defragmentation measures on 93 priority sections of federal highways. Ecoducts and green underpasses may serve both the defragmentation of wildlife habitat and the safety of road users as a result of the reduction of game accidents.


Benning H.,Bundesministerium fur Verkehr | Goj K.,Oberste Baubehorde im Bayer | Marzahn G.,Landesbetrieb Strassenbau Nordrhein Westfalen | Mertzsch O.,Landesamt fur Strassenbau und Verkehr Mecklenburg Vorpommern
Bauingenieur | Year: 2012

While analyzing traffic volume on current German autobahns, it became obvious that the planned capacity of most highway bridges has been almost exceeded by daily traffic volume, Including increasingly heavy trucks with rising numbers of axles and load size. In fact, to ensure future long-term serviceability of the German autobahn system, there is no way around refurbishing most of these bridges, by combining ordinary maintenance work with strengthening measures, and replacing numerous others as well. A realistic assessment of existing highway bridges that comprises bearing capacity, serviceability, and fatigue resistance in order to evaluate their structural health is a widely accepted prerequisite for a long-lasting refurbishment strategy. The provisions reported here for evaluating necessary upgrades of older bridges provide an appropriate tool for setting uniform standards in assessing existing highway bridges to ensure comparability of results and the conclusions drawn from them.


Erhorn H.,Fraunhofer Institute for Building Physics | Bergmann A.,Fraunhofer Institute for Building Physics | Beckert M.,Fraunhofer Institute for Building Physics | Reiss J.,Fraunhofer Institute for Building Physics | Hegner H.-D.,Bundesministerium fur Verkehr
Bauphysik | Year: 2013

Validation measurements of the BMVBS Efficiency House Plus in Berlin - Survey period from March 2012 to February 2013. In Berlin, the German Federal Ministry of Transport, Building and Urban Development (BMVBS) had a model building erected to pilot the new funding initiative 'Efficiency House Plus'. This model is also intended to test and prove the performance of various components of the concept and to provide experience for a wider application. During a 2-year monitoring programme conducted by Fraunhofer IBP, data of the occupied building will be measured and analysed with regard to its energy performance. This report presents the first preliminary results obtained from a 12-month survey period. Measurements found that - despite unfavourable meteorological boundary conditions - the power yields from façade-integrated PV systems still exceeded the energy needs of building services and building users during the survey period. The resultant surplus energy was used to cover about 25 % of the energy demand for electro-mobility. Under 'regular' weather conditions the House would have been able to completely cover the energy demand of the electric vehicles, and still there would have been energy left to be fed into the public grid. The meteorological boundary conditions that were prevailing in the measurement period from March 2012 through February 2013 caused a 20 % drop (3,320 kWh) in the solar power yield due to an actual reduction of the sunshine hours, which were about 40 % less than the annual average of the last ten years. In the survey period, the energy consumption in the building was about 75 % higher than predicted. This discrepancy was mainly due to the inefficient performance of the heating system (caused by substantially higher system temperatures than assumed). It was further due to the uncontrolled amount of outdoor air in the mechanical ventilation system and last but not least it was also due to the fact that the electricity consumption of household appliances was higher than expected. The results of the first year of operation suggest that in the case of high-performance buildings it is absolutely required to include a planned monitoring and regulation/control phase, to be capable of realising the design parameters in practice. © 2013 Ernst & Sohn Verlag für Architektur und technische Wissenschaften GmbH & Co. KG, Berlin.


Hegger J.,RWTH Aachen | Marzahn G.,Bundesministerium fur Verkehr | Teworte F.,HP Ingenieure GmbH and Co. KG | Herbrand M.,RWTH Aachen
Beton- und Stahlbetonbau | Year: 2015

The structural assessment of existing road bridges that has been recently performed on the basis of the equally named provisions, issued in 2011 by the Federal Ministry of Transport and Urban Affairs, have revealed significant deficits in shear and torsion as well as fatigue resistance especially in prestressed concrete bridges. In a research project, funded by the Federal Highway Research Institute of Germany, design methods have been developed that were incorporated into the first addendum of the Structural Assessment Provisions. This paper describes the respective design methods for shear under static and cyclic loading without shear reinforcement. The procedures take into account current research results as well as the design codes for concrete bridges and are based on a verification of the principal tensile stresses. The use of the procedure and the main results are shown exemplarily by a design example of a typical box girder bridge of the German road network. © Ernst & Sohn Verlag für Architektur und technische Wissenschaften GmbH & Co. KG.


Friebel W.-D.,Bundesministerium fur Verkehr | Blosfeld J.,Bundesanstalt fur Strassenwesen BASt | Kaundinya I.,Bundesanstalt fur Strassenwesen BASt
Bautechnik | Year: 2010

In the recent past it was shown that road tunnels can be damaged severely by large fires. For that reason several international research projects were carried out for further development of structural fire protection of road tunnels. Based on international research projects three national research projects were initiated by the Federal Ministry of Transport, Building and Urban Development (BMVBS) and the Federal Highway Research Institute (BASt). In the course of these projects existing temperature-time-progressions (so called "fire curves") for road tunnels, fire tests in tunnels and real fires in road tunnels were analyzed with regard to a possible application for the design of structural fire protection of road tunnels. Furthermore the temperature penetration in the tunnel lining and the load bearing capacity of usual tunnel sections were numerically examined under fire influence. Finally the influence of fiber-modified concrete on the effect of explosive spalling was investigated by means of large scale fire tests on specimens made of concrete for tunnel lining. In the following procedures and results of the national research projects are described. © Ernst & Sohn Verlag für Architektur und technische Wissenschaften GmbH & Co. KG, Berlin.


The traffic forecast assumes a sharp increase in goods transport by road. In the future, this will result in an even higher traffic load and thus to an even higher degree of wear of the bridges. Many older bridges can no longer fully meet the continually increasing requirements. These structures, including many large valley and river bridges, are affected more and more by wear and tear and damages. They are located almost exclusively in the old federal states. The question arises as to how these bridges can be used or even strengthened in the future. With the strategy for post-test calculations and strengthening of the bridge stock developed by the Federal Ministry of Transport, Building and Urban Development a nationally uniform approach was elaborated together with the Federal Highway Institute and the road construction administration of the federal states. This concept aims at examining for everyone of the individual bridges concerned whether it still meets the requirements of heavy-goods transport today and in the future. The so-called post-test calculation guideline specially developed for this purpose forms the core of this task. What needs to be done is to improve the structural condition of the road bridges as well as to eliminate deficits of the load-bearing capacity. The objective of all efforts has to be the prevention of extensive traffic restrictions up to the closure of a bridge. Copyright © 2013 Ernst & Sohn Verlag für Architektur und technische Wissenschaften GmbH & Co. KG, Berlin.


With the "Flutmulde Rees" flood retention basin between Rhine kilometres 833.5 and 839.0 and an amount of more than EUR 56 million invested, the Duisburg-Rhine Waterways and Shipping Agency is realising one of the biggest hydraulic engineering projects in the history of the WSV. Designed as a side channel, the project has been under construction in a 5-year building period on the left side of the Rhine across the city of Rees since September 2009. The flood basin is part of an overall project to deepen the fairway of the Lower Rhine between the Port of Duisburg and the ports of Antwerp, Rotterdam and Amsterdam from 2.50 to 2.80 metres below the reference water level. The local, over-proportional erosion tendencies are being minimised and the water bed globally stabilised by partially draining off the floodwater through the flood basin. Thanks to the installation of elements to secure the ecology and its effect of neutralising floodwater, the "Flutmulde Rees" is also setting trends from a water management perspective.


Schafer K.,Bundesministerium fur Verkehr | Schafer B.,Bundesministerium fur Verkehr | Herpertz D.,Bundesministerium fur Verkehr
Wasser und Abfall | Year: 2011

According to the new Water Management Act, the federation as owner of the federal waterways assumes the responsibility for their water management maintenance. Hence, complementary to traffic-related maintenance, the waterways administration has new possibilities to render a contribution to a sustainable management of federal waterways within the meaning of the EU Water Framework Directive. With the ?conceptual framework maintenance?, a comprehensive basis has been presented for this purpose.


Following calls from the private sector for the introduction of 60-tonne vehicles based on the modular system (also known as supertrucks), the Bridge Construction and Civil Engineering Division at the Federal Ministry of Transport, Building and Urban Development has joined forces with the Federal Highway Research Institute and the highway authorities of the federal states and has, over the last three years, been addressing in great detail the issue of the load-carrying capacity of bridges on federal trunk roads, especially that of the stock of older bridges. The author has already published two articles, entitled "Bridges and heavy goods vehicle traffic - where are the limits?" [1] and "Bridges and heavy goods vehicle traffic - taking stock" [2], in which he reports on the background and findings. The studies have largely been completed. The findings confirm that, given the continuing sharp rise in the volume of heavy goods vehicle traffic, it is imperative that the existing bridges be strengthened as quickly as possible to ensure that the infrastructure remains resilient to future traffic levels. In this, the third and final article, the author summarizes the major findings once again and describes the strategy for tackling these huge challenges.


Naumann J.,Bundesministerium fur Verkehr
Bauingenieur | Year: 2010

After a long phase of new and re-construction of the federal trunk road network, first in West Germany and after reunification also in Eastern Germany, maintenance and improvement of the existing network will become increasingly important. In particular the enormous growth of goods traffic and the extreme increase in heavy goods transport are the reason why the agencies responsible for construction and maintenance examine whether the existing network will in the long run continue to cope with the burden caused by the continuous increase in the traffic volume. Here the focus of the examination is especially on the bridge structures, because the major part of the large brjdges was built, at least in West Germany, in the 60s, 70s and 80s , but at that time they were not dimensioned for these high traffic volumes. The Federal Ministry of Transport, Building and Urban Affairs therefore started by initiating an extensive inventory which contains the traffic development, the development of the stress, calculation and dimension regulations as well as the structure of the bridge stock. This is the basis on which the decision will have to be taken as to whether the bridges will also satisfy future traffic demands with the safety level required or whether reinforcements and renovations are necessary.

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