Artikeldatenbank
Autor(en) | Titel | Zeitschrift | Ausgabe | Seite | Rubrik |
---|---|---|---|---|---|
Gud uli , Vladislav; Neu, Gerrit Emanuel; Gebuhr, Gregor; Anders, Steffen; Meschke, Günther | Numerisches Mehrebenen-Modell für Stahlfaserbeton: Von der Faser- zur Bauteilebene - Mehrstufige Validierung anhand einer experimentellen Studie an hochfestem Faserbeton | Beton- und Stahlbetonbau | 2/2020 | 146-157 | Aufsätze |
KurzfassungIm Beitrag wird die Prognosefähigkeit eines numerischen Mehrebenen-Modells für stahlfaserverstärkte Betonstrukturen aus hochfestem Beton anhand einer die Faser- und die Strukturebene umfassenden Testserie systematisch untersucht. Die experimentelle Studie umfasst Auszugsversuche an Dramix 3D 55/60 und 65/60 Fasern in hochfestem Beton mit unterschiedlichen Einbettungslängen und Neigungen zur Rissfläche auf der Mesoskala sowie Dreipunkt-Biegezugversuche an gekerbten Balken mit drei stark unterschiedlichen Fasergehalten zur Abbildung des Strukturverhaltens. Das numerische Modell ist derart konzipiert, dass es die direkte Verfolgung des Einflusses der Entwurfsparameter wie Faserart, Faserorientierung, Fasergehalt und Betonfestigkeit auf die Strukturantwort ermöglicht. Hierzu werden Submodelle auf der Ebene der Einzelfaser zu Rissüberbrückungsmodellen in Abhängigkeit von Faserorientierung und Fasergehalt zusammengeführt und zum Zwecke numerischer Strukturanalysen in ein Finite-Elemente-Modell integriert. Die Validierung der Modelle für endverankerte Stahlfasern zeigt, dass die wesentlichen Interaktionsmechanismen zwischen Faser und hochfestem Beton für alle untersuchten Fälle (Faserorientierung, Einbettungslängen) wirklichkeitsnah abgebildet werden. Auf der Strukturebene zeigen die Ergebnisse der numerischen Simulationen auf Basis des Faserbetonmodells eine sehr gute Übereinstimmung für alle Fasergehalte, sowohl was die maximale Last als auch das Nachbruchverhalten betrifft. x | |||||
Mit "CEMEX Go" wird die Baustoffbranche digital | Beton- und Stahlbetonbau | 2/2020 | 157 | Nachrichten | |
Beton- und Stahlbetonbau aktuell 2/2020 | Beton- und Stahlbetonbau | 2/2020 | 159-161 | Beton- und Stahlbetonbau aktuell | |
Kurzfassung
x | |||||
Kongresse - Symposien - Seminare - Messen | Beton- und Stahlbetonbau | 2/2020 | 162 | Veranstaltungskalender | |
Content: Geomechanics and Tunnelling 2/2020 | Geomechanics and Tunnelling | 2/2020 | Contents | ||
Digitisation in Tunnelling | Geomechanics and Tunnelling | 2/2020 | Cover Pictures | ||
KurzfassungThe 2.9 Tm long twin-tube Oberau Tunnel is the central element of the 4.2 km long Oberau bypass. 80 % of the tunnel was excavated by drill and blast in hard rock and 20 % by hydraulic excavator in the soil crossing the Gießenbach valley. In the soft ground section, which is susceptible to settlement, the works were carried out under the protection of pre-support in the form of an umbrella of AT-Tubespiles with lengths of 6 m (see page 249). x | |||||
Geomechanics and Tunnelling 2/2020 | Geomechanics and Tunnelling | 2/2020 | Imprint | ||
Galler, Robert | Digitisation in Tunnelling / Digitalisierung im Tunnelbau | Geomechanics and Tunnelling | 2/2020 | 126-127 | Editorials |
News: Geomechanics and Tunnelling 2/2020 | Geomechanics and Tunnelling | 2/2020 | 128-139 | News | |
KurzfassungStuttgart 21 - First tunnel breakthrough at the south head-Stuttgart 21 - Erster Tunneldurchschlag am Südkopf x | |||||
People: Geomechanics and Tunnelling 2/2020 | Geomechanics and Tunnelling | 2/2020 | 140-142 | People | |
KurzfassungObituary Georg Vavrovsky - Dipl.-Ing. Dr. mont. Baurat h.c. Georg-Michael Vavrovsky verstorben x | |||||
Ehrbar, Heinz; Franz, Stefan; Weiner, Thorsten; Fentzloff, Wolfgang; Frodl, Stephan | Digital Design, Building and Operation of Underground Structures - DAUB Recommendation for BIM in Tunnelling / Digitales Planen, Bauen und Betreiben von Untertagebauten - DAUB-Empfehlung zu BIM im Untertagebau | Geomechanics and Tunnelling | 2/2020 | 147-163 | Topics |
KurzfassungThe digitalisation of many areas of the economy is progressing, also in construction, where the intention is to provide information about built facilities for decision-makers concerning the design, building and operation of construction works in a consistently high quality, easily read and data-based. Until now, digitalisation in construction has been retarded by the high complexity of construction, which should however now rapidly change. The DAUB recommendation “Digital Design, Building and Operation of Underground Structures” is intended to make a contribution in this regard. x | |||||
Goger, Gerald; Bisenberger, Tobias | Digitalization in infrastructure construction - Developments in construction operations / Digitalisierung im Infrastrukturbau - Baubetriebliche Entwicklungen | Geomechanics and Tunnelling | 2/2020 | 165-177 | Topics |
KurzfassungTransport infrastructure is a fundamental cornerstone for mobility of the population and also functions as a motor for the economy. New digital methods along the value chain will be used to digitally support the process in the future, from the very first project idea, through tendering and construction to the maintenance of infrastructure projects. The four levers of digital transformation - data, automation, networks and access - will have a significant impact on this process in infrastructure construction. Networking of data sources and storage of data in off-grid databases is already possible, a development which enables project participants to analyse the construction data, process it and at the same time use it as a documentation basis during the development phase and for later maintenance measures. Such a well-founded digital database can be used to evaluate, optimize and completely document construction-related processes. This paper deals with various digital application areas in infrastructure construction and provides an overview of digitalisation developments in this field. x | |||||
Cudrigh-Maislinger, Susanna; Hruschka, Sabine; Niedermoser, Christoph; Torggler, Nathan; Steiner, Peter | Karawanken Tunnel northern section, conception and execution of a BIM pilot project / Karawankentunnel Nord, Konzept und Ausführung eines BIM-Pilotprojekts | Geomechanics and Tunnelling | 2/2020 | 178-189 | Topics |
KurzfassungThe BIM pilot project for the Karawanken Tunnel North consists of three main components, 3D modeling of the geological prognosis and actual conditions, the inner lining and inner components of the tunnel and the portal building and road elements at the portal. The pilot project was started when the preliminary design of the tunnel was already done. Only the portal building was done in BIM from the beginning. For the tunnel lining, the 3D modeling, quantity check and simplified 4D and 5D procedures together with the contractor were the main issues. A major effort had to be invested into data structuring following IFC and Asfinag requirements. Currently the tunnel is being advanced. Regular workshops are held to re-define the project targets and improve the achievement of the pilot project. x | |||||
Marcher, Thomas; Erharter, Georg H.; Winkler, Manuel | Machine Learning in tunnelling - Capabilities and challenges | Geomechanics and Tunnelling | 2/2020 | 191-198 | Topics |
KurzfassungDigitalization will change the way of gathering geological data, methods of rock classification, application of design analyses in the field of tunnelling as well as tunnel construction and maintenance processes. In recent years, a rapid increase in the successful application of digital techniques (Building Information Modelling and Machine Learning (ML)) for a variety of challenging tasks has been observed. Driven by the increasing overall amount of data combined with the easy availability of more computing power, a sharp increase in the successful deployment of techniques of ML has been seen for different tasks. ML has been introduced in many sciences and technologies and it has finally arrived in the fields of geotechnical engineering, tunnelling and engineering geology, although still not as far developed as in other disciplines. This paper focuses on the potential of ML methods for geotechnical purposes in general and tunnelling in particular. Applications such as automatic rock mass behaviour classification using data from tunnel boring machines (TBM), updating of the geological prognosis ahead of the tunnel face, data driven interpretation of 3D displacement data or fully automatic tunnel inspection will be discussed. x | |||||
Weichenberger, Franz Peter; Schwaiger, Christian; Höfer-Öllinger, Giorgio | From geological mapping to representation in BIM / Von der geologischen Aufnahme zur BIM-Repräsentation | Geomechanics and Tunnelling | 2/2020 | 199-211 | Topics |
KurzfassungStarting with geological field mapping in the tunnel, a process can be implemented to transform all geological observations into data structures for later use in BIM systems. All necessary basics are already available and a reference implementation has been programmed. When corresponding standards become available, which will be the case in the next one to two years, universal interchangeability of the information will also be provided. This will ensure that the ground model can be maintained through the life cycle, and the ground - as part of the Digital Twin of the structure - is available in later project phases like operation, maintenance, enlargement und renaturation. x | |||||
Alsahly, Abdullah; Hegemann, Felix; König, Markus; Meschke, Günther | Integrated BIM-to-FEM approach in mechanised tunnelling | Geomechanics and Tunnelling | 2/2020 | 212-220 | Topics |
KurzfassungIn current tunnelling practice, Finite Element (FE) simulations form an integral element in the planning and the design phase of mechanised tunnelling projects. The generation of adequate computational models is often time consuming and requires data from many different sources, in particular, when manually generated using 2D-CAD drawings. Incorporating Building Information Modelling (BIM) concepts offers opportunities to simplify this process by using geometrical BIM sub-models as a basis for structural analyses. This paper presents a Tunnel Information Model (TIM) as a BIM specifically tailored to fit the needs of mechanised tunnelling projects and a “BIM-to-FEM” technology, that automatically extracts relevant information (geology, alignment, lining, material and process parameters) needed for FE simulations from BIM sub-models and subsequently performs FE analysis of the tunnel drive. The results of the analysis are stored centrally on a data server to which the user has continuous access. A case study from the Wehrhahn-Metro line project in Düsseldorf, Germany, is presented and discussed to demonstrate the efficiency and the applicability of the proposed BIM-to-FEM workflow. x | |||||
Weil, Jonas | Digital ground models in tunnelling - Status, chances and risks / Digitale Baugrundmodelle im Tunnelbau - Status, Chancen und Risiken | Geomechanics and Tunnelling | 2/2020 | 221-236 | Topics |
KurzfassungDigital data acquisition and processing in geology and geotechnics are essential in all phases of a tunnelling project. This article describes typical work flows of engineering geology and the digital tools used, and discusses the requirements, chances and risks associated with the integration of ground models into BIM projects. The handling of factual data is depicted, but the main topic is the development and application of interpreted geological models for tunnelling. Aspects like the transferred information and its localisation, uncertainty of a prediction and requirements for formats, data structures and software environment are discussed. Efficient exchange and long-term usability of information demands clear definitions for the specialist models and use cases to be covered. x | |||||
Wenighofer, Robert; Waldhart, Johannes; Eder, Nina; Zach, Katharina | BIM use case - Payment of tunnel excavation classes - Example Zentrum am Berg / BIM-Anwendungsfall (AwF) Abrechnung-Vortrieb am Beispiel des Zentrums am Berg | Geomechanics and Tunnelling | 2/2020 | 237-248 | Topics |
KurzfassungBIM modelling of infrastructure works is controlled by a global market consisting of few software suppliers and is contingent upon the functions provided by them. Customization options furnished by the software suppliers often enable enhancement of functions, which is essential for infrastructure BIM although not completely available. This enables improved interoperability of the software tools used in this area. IFC is most likely to become an established international format for data exchange with its constant but also intricate further development. However, in underground infrastructure construction, both international and national standards are used and the integration of the latter in IFC cannot be anticipated. Hence, the implementation of BIM has to apply national standards in the use cases of collaborative data exchange among the different disciplines in tunnelling. In this contribution, the use case of payment of excavation classes and its implementation in a BIM environment are addressed. It discusses the interoperable interlinkage of software tools commonly used in construction to generate consistent digital data transfer and it underscores the need for an interdisciplinary agreement to integrate national standards into adequate practice for the implementation of BIM. x | |||||
Site Reports: Geomechanics and Tunnelling 2/2020 | Geomechanics and Tunnelling | 2/2020 | 249-250 | Site Reports | |
KurzfassungEfficient connection from Munich to Garmisch-Partenkirchen: The new Oberau Tunnel - Effiziente Verbindung von München nach Garmisch-Partenkirchen: Der neue Tunnel Oberau x | |||||
Safe dust suppression with water mist spraying - Sicheres Staubbinden durch Wasservernebelung | Geomechanics and Tunnelling | 2/2020 | 251-252 | Product Informations | |
Diary of Events: Geomechanics and Tunnelling 2/2020 | Geomechanics and Tunnelling | 2/2020 | 253-254 | Diary of Events | |
Inhalt: geotechnik 2/2020 | geotechnik | 2/2020 | Inhalt | ||
Titelbild: geotechnik 2/2020 | geotechnik | 2/2020 | Titelbild | ||
Kurzfassung
x | |||||
Kirsch, Fabian | Das Vier-Augen-Prinzip in der Geotechnik | geotechnik | 2/2020 | 59-60 | Editorials |
Beuße, Jannik; Grabe, Jürgen | Messtechnische Begleitung der Einbringung einer Tragbohle mittels Vibration und Schlagrammung | geotechnik | 2/2020 | 61-76 | Aufsätze |
KurzfassungDie lagegetreue Installation kombinierter Stahlspundwände ist weiterhin eine Herausforderung. Deformierte oder von ihrer geplanten Lage abweichende Tragbohlen können zu einem Systemversagen führen. Es gibt nur vereinzelt Empfehlungen, wie das Einbringgerät und die Rammführung passend zum Boden und der einzubringenden Tragbohle zu wählen ist. Zusätzlich wird der Nachweis für kombinierte Wände nur für den Endzustand erbracht, obwohl das Tragverhalten durch den Installationsprozess beeinflusst wird, sodass Richtlinien für die Auswahl einer zielführenden Rammkonfiguration sowie ein Nachweisverfahren unter Berücksichtigung der Einflüsse aus dem Einbringverfahren benötigt werden. Um die Dynamik des Installationsprozesses von Tragbohlen genauer zu untersuchen, wird die Einbringung einer Tragbohle mittels Vibration und Schlagrammung im Rostocker Hafen untersucht. Dabei werden die Beschleunigungen, Dehnungen und Neigungen an der Tragbohle gemessen. Zusätzlich werden die Beschleunigungen an der Rammführung und am Einbringgerät gemessen, um deren Einfluss auf das Bewegungsverhalten der Tragbohle zu untersuchen. Die resultierende Verformung und die Lage der Tragbohle im Endzustand kann ermittelt werden. x |