Wellin Sadgorski 80 (Ulrich Smoltczyk)
DBV ehrt Dr. Karl Morgen mit der Emil-Mörsch-Denkmünze
Preis zur KGS-Lecture an Prof. Katzenbach

5. Siegener Symposium “Sicherung von Dämmen, Deichen und Stauanlagen” (Prof. Dr.-Ing. Mahmud Thaher, Weiterstadt)
Nachbericht zum 6. RuhrGeo Tag (Stefanie Danne, Nina Müthing)
Nachbericht zum 22. Darmstädter Geotechnik-Kolloquium

Fachvorträge und Tiefbaurechtspreis auf Baugrunddiskussion in Wien (RA Dr. jur. Günther Schalk)
Das aktuelle Urteil: Auftraggeber rügt unberechtigt Mängel - wer zahlt die getroffenen Maßnahmen? / Öffentlicher Auftraggeber schreibt lückenhaft aus - wer trägt das Risiko? (RA Dr. jur. Günther Schalk)

Stimmt das Nachweisverfahren DA2* mit dem Nationalen Anhang der DIN EN 1990 überein? (Dr.-Ing. Markus Herten, Dr.-Ing. Bernd Schuppener)
Aufruf zur Mitarbeit am Normprojekt für nachhaltige Spundwände aus Kunststoff

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The M1 energy-efficiency building Plus was to render practical proof that the advantages of solid construction such as carrying capacity, fire protection and sound protection could be connected to state-of-the-art and future energy efficiency standards in the scope of a pilot project. With simple and thought-through planning details and a coordinated system technology, energy plus solid houses are no longer merely visions. The M1 project mostly focuses on the claim to economic efficiency and saleability of the product, points out new possibilities for implementation to consumers, planners and executing companies.
The house is to document, that the means available now are sufficient to construct a solid building that produces more energy than it consumes. In the technical term of construction physics, the building is targeted at a negative final energy and primary energy consumption.
The data presented in this article from the monitoring of the last two years show that a plus energy target can be achieved by “nearly” conventionally built solid buildings. For both years, the M1 pus energy house reached an excess of final and primary energy.

In 2013, a new draft of a complete standard for DIN 4109 “Soundproofing in buildings” was issued in 4 parts - “Requirements”, “Method of calculation”, “Parts catalogue” and “Testing acoustics in buildings”. It includes several increases in the requirements for protection against airborne noise and impact sound by comparison to DIN 4109:1989. The increases are based on the grades from monitored buildings of standard construction periodically noted in recent years. Significant changes are also included in Part 2 “Input data for verifying the requirements by calculation”. A detailed computation of all transmission paths is carried out here, taking into account the special vibration reducing indices. For a brick wall, the specific indices for the weighted sound reduction index R’w,R are shown that arise for various formations of the joints. When compared with the calculated values according to DIN 4109:1989 there are differences of up to 10 dB.

For several years, the sound insulation ratings for multi-storey buildings have been in transition and are being brought into line with the European calculation method according to EN 12354:2000. The drafts of DIN 4109 have been available since November 2013. The forecasting procedure for the expected airborne sound insulation in solid buildings will change considerably by comparison to the regulations in Supplement 1 to DIN 4109:1989.
In recent years, the building acoustics testing unit of Xella Technologie- und Forschungsgesellschaft mbH has carried out numerous quality tests to determine the acoustic insulation of apartment partitioning walls and apartment partitioning floors in apartment buildings. The exterior walls of the buildings reviewed consist exclusively of plastered, autoclaved aerated concrete block walls. The interior walls were made primarily of autoclaved aerated concrete or limestone blocks. In a few cases, dry constructed or reinforced concrete inner walls were present. A comparison is presented between the test results of these quality tests and the design values of the assessed sound reduction index R’w according to E DIN 4109-2:2013. During these tests, a discussion took place on the uncertainty that must be incorporated in the calculation so as to achieve an adequately high level of planning assurance.

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Masonry walls constructed with lightweight AAC blocks and thin-layer mortar meet the increasingly strict requirements of energy efficiency and sustainability. In this sense, they represent an excellent solution for modern buildings, not only for external cladding but also as loadbearing elements. Despite the possible advantages of using lightweight AAC masonry, a specific assessment of its seismic performance is mandatory in order to set design recommendations allowing to reach safety levels consistent with those required for other masonry types complying with EN 1998 standard requirements.
A comprehensive study on the seismic performance of unreinforced masonry buildings made of lightweight AAC was carried out in an integrated experimental-numerical approach. The experimental campaign provided the necessary information to setup a reliable numerical model to be extensively used to assess the seismic performance of a number of prototype AAC masonry buildings with different characteristics, by means of both linear and nonlinear static (pushover) analysis.
The results of this systematic numerical assessment were eventually used to draft design recommendations, to set parameters (behaviour factors) to be used in linear analysis and to calibrate rules for simple buildings.

Autoclaved Aerated Concrete (AAC) masonry is widely used in the UK and is a commonly utilised material, predominantly for housing, but also for other building structures. First produced in the 1950s in the UK, it has become an important masonry solution for houses used in number locations from cavity walls to below ground and in concrete beam and block floors. This paper looks at why the material has become so popular and the background for the acceptance of use. The growth of the market for AAC has been driven by changes to Building Regulations and solutions have been developed to improve the structures thermal and acoustic performance.

Trials and simulations provide important aids in the development of products for constructing brickwork. The balance between measurement and simulation is one of the classic duties for model validation. If the difference between the measurement and the recalculation is excessive, an approximation task for minimizing the differences can be formulated. Optimization tasks for calibration between measurement and simulation are often deemed to be an identification problem. In the past this task was generally processed through iterative adaptation of individual characteristics. With the availability of parameter optimization programs, the iterative manual alignment can be automated and even more complex tasks can be dealt with. The necessity of such automated identification procedures becomes even more important due to the speed of innovation in current product development processes. Within virtual prototyping, virtual testing is the key towards a reduction in hardware tests. Only when reference experiments achieve a comparison of major results between measurement and simulation, can it be presumed that all the relevant phenomena for the actual test result are included in the virtual model and thus predictable models are available for virtual testing. Using brickwork exposed to fire as the example, with the aid of modern mathematical procedures, the article shows that parameter identification can be carried out in a systematic, efficient and target orientated manner.

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Masonry Day in Memmingen enthusiastically received / Reges Interesse beim Mauerwerkstag in Memmingen
Built-in qualities - Hagemeister Clinker Brick Seminar 2015 / Werte gestalten - Hagemeister Klinker-Fachseminar 2015

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Technische Konstruktionen, bei denen ein oder mehrere Parameter den Bereich gewöhnlicher Dimensionen verlassen, erweisen sich vielfach als nicht kompatibel für die Anwendung der üblichen Konstruktions- und/oder Dimensionierungsprinzipien. Es lässt sich zeigen, dass auch bei scheinbar phänomenologischer Analogie zweier zu vergleichender Konstruktionen, bei gleichzeitiger offensichtlicher Maßstabsverzerrung statt einer Übertragung von Erfahrungswerten oder von normierten Prozeduren in Bezug auf die Auslegung einer Konstruktion oder auf deren statische und dynamische Fähigkeiten, sinnvolle Sonderlösungen anzuwenden sind.
Die Hochmoselbrücke verlässt mit Parametern wie ihrer Bauhöhe über Grund (ca. 160 m), ihrer Gesamtlänge von ca. 1702 m und ihrer maximalen Einzelstützweite von ca. 210 m, die auch während des Montagevorganges nicht durch Hilfsabstützungen zu reduzieren war, in Teilen übliche Dimensionen des Ganzstahlbrückenbaus. Für die Durchführung der im Taktschieben zu realisierenden Überbau-Montage, wird bei der Überwindung der maximalen Einzelstützweite ein in Europa noch nicht erreichter freier Kragarm ausgeführt werden.

The Hochmosel-Bridge, Germany - Manufacture, assembly and design of the superstructures.
Technical constructions in which one or more parameters are beyond the scope of its ordinary dimension often prove to be incompatible for the application of the ordinary, conventional design principles. It can be shown that even with apparent phenomenological analogy of two to comparative constructions, while apparent scale distortion rather than a transfer of experience or standardized procedures with regard to better special solutions are applied to the design of a structure or their static and dynamic capabilities. The Hochmoselbrücke leaves with parameters such as height above ground (about 160 m), her total length of 1702 m, and her maximum single span of about 210 m, which was also not reduced by auxiliary supports during the assembly process, parts of usual dimensions of a full-steel-bridge-construction. The stepwise implemented assembly and move procedure of the site-process (for the superstructure assembly) brings in overcoming of these single span a new record of a free cantilever executes process in Europe.

Die 220 m lange Fußgängerbrücke in Lyon überspannt die rund 160 m breite Rhône in einem Bogen mit flachem Stich. Dickwandige Stahlrohre bilden einen Dreigurt, der an den Ufern eingespannt ist. Die Stahlkonstruktion ist mit einem leichten Holzbelag versehen. Durch die Minimierung der Elemente wird eine maximale Transparenz erreicht. Die Treppen, die entlang der Bögen nach unten geführt werden, erschließen die Uferbereiche und bilden eine spannende Wegeführung vom Ufer der Rhône zum zentralen Platz. Zusammen mit dem Architekturbüro DFA Dietmar Feichtinger Architectes, Paris, und der Unterstützung des Bauherrn GRAND LYON, konnte dieser gestalterisch und technisch anspruchsvolle Brückenentwurf realisiert und auf die örtlichen Bedingungen maßgeschneidert werden. Im Folgenden werden Entwurfsidee, Konstruktion und Berechnung dargestellt sowie ein Überblick über Fertigung und Montage der Brücke vermittelt.

Peace bridge for Lyon.
The 220 m long pedestrian bridge in Lyon spans in a smooth way over the 160 m wide river Rhône. The elements of the three-chord truss alter their position along the bridge and create a flat, wide V in the middle of the bridge. The steel structure is covered with light wooden planks. Through minimization of the elements maximum transparency is achieved. Between the direct connection straight to both city parts stairs are leading to the path along the shore, attached to each side of the bridge along the side of the three-chord truss. Together with the architects DFA Dietmar Feichtinger Architectes, Paris, and the support of the client GRAND LYON, this technically challenging bridge design could be realized and adapted to local conditions. The following text provides details about the design idea, design and structural analysis, as well as an overview of assembly and erection of the bridge.

Bewegliche Fähranleger haben eine Schlüsselfunktion innerhalb des zunehmenden Roll-on-Roll-off-Verkehrs im Seehandel. Die besonderen Anforderungen an die Planung und die Ausführung - auch im Hinblick sehr kurzer Planungsprozesse von nur einem Jahr vom Planungsbeginn bis zur Vergabe - zeigen, dass große gewerkübergreifende Projekte auch in Deutschland bewältigt werden können. Die interdisziplinäre Zusammenarbeit von Ingenieurbau, Wasserbau, Elektro- und Hydraulikplanung ist die Grundlage einer schnellen Realisierbarkeit solcher Bauvorhaben. Die besonderen technischen Anforderungen und Lösungen, insbesondere für den Stahlbrückenbau, sollen beispielhaft an den Doppeldeckfähranlegern in Rostock und Lübeck aufgezeigt werden. Dabei stellen die kinematischen Randbedingungen, die besonderen Lastsituationen und die hafentypischen Lastmodelle in Verbindung mit der gewichtsoptimierten Bauweise das Hauptaugenmerk dar. Die Frage, ob Fähranleger komplexe Brückenbauwerke oder Maschinenkonstruktionen sind, wird nachfolgend beantwortet.

Maritime moveable bridges - Steel linkspans for Rostock Port and Lübeck Port Authority.
Linkspans play a key role within the increasing RoRo traffic in sea trade. The particular requirements related to design and execution, also with regard to very short planning processes of only one year from the start of planning until contract awarding, indicate that large multi-disciplinary projects can also be accomplished in Germany. The interdisciplinary cooperation in civil engineering, hydraulic engineering, electric and hydraulic planning forms the basis for a fast realization of such construction projects. The specific technical requirements and solutions, in particular for steel bridge construction, are demonstrated using the double-deck linkspans in Rostock and Lübeck as examples. The main focus of this essay based on the kinematic boundary conditions, the specific load situations as well as on the typical harbor load models in connection with the weight-optimizing construction method. The question will be answered whether linkspans are counted among complex bridge structures or machine constructions.

In dem hier vorgestellten Forschungsprojekt wurden durch die TU Dortmund, die MPA Darmstadt und das Institut für Korrosionsschutz Dresden GmbH der wissenschaftliche und technische Nachweis eines sicheren Einsatzes der Feuerverzinkung im Stahl- und Verbundbrückenbau erbracht (Teil 1 s. Stahlbau, H. 1/2015). Durch Laborbelastungen und Freibewitterung konnte die Korrosionsschutzwirkung der Feuerverzinkung für bis zu 100 Jahre, d. h. über die gesamte rechnerische Lebensdauer einer Brücke hinweg, nachgewiesen werden. Durch zusätzliche Entwicklung einer Ausführungsanweisung für Montagestöße können damit die ökologischen und ökonomischen Vorteile gegenüber den aktuell eingesetzten Korrosionsschutzsystemen genutzt werden.

Hot-dip galvanizing in bridge construction - Part 2: Using hot-dip galvanizing as a lifetime corrosion protection for bridge constructions.
In the here presented research project the scientific and technical evidence for the safe use of hot-dip galvanizing for steel and composite bridges were provided by TU Dortmund, MPA Darmstadt and Institut für Korrosionsschutz Dresden GmbH. By laboratory tests and natural weathering the evidence of the corrosion protection of hot dip galvanizing for up to 100 years, i. e. over the entire calculated life of a bridge, could be provided. With the additional developed design guide for mounting joints the environmental and economic advantages over the currently applied corrosion protection systems can be used.