Artikeldatenbank
Autor(en) | Titel | Zeitschrift | Ausgabe | Seite | Rubrik |
---|---|---|---|---|---|
ATV-Seminare | Bautechnik | 10/1999 | 935 | Termine | |
ATV-Leistungsvergleich kommunaler Kläranlagen | Bautechnik | 8/1999 | 716 | Nachrichten | |
ATV-DVWK-Tagung 3. Klärschlammtage | Bautechnik | 3/2003 | 205 | Termine | |
ATV-Bundestagung 1998 | Bautechnik | 7/1998 | 494 | Termine | |
Attraktiver Wohnturm in Berlin-Spandau | Beton- und Stahlbetonbau | 8/2002 | 429 | Information | |
Attraktive Seniorenresidenz | Mauerwerk | 3/2008 | 145-146 | Anwendungsberichte | |
Poorbiazar, Sascha; Naeff, Andreas; Kusch, Oliver; Lünser, Katrin | Atriumüberdachung und Stahlwendeltreppe für das Laborgebäude D-BSSE der ETH Zürich in Basel | Stahlbau | 10/2021 | 741-748 | Aufsätze |
KurzfassungHerrn Dipl.-Ing. Wolfang Eilzer zur Vollendung des 65. Lebensjahres gewidmet. x | |||||
Atmosphärische Korrosion - Korrosionsschutz im Stahlbau | Stahlbau | 8/1999 | 691 | Termine | |
Atmosphärische Korrosion - Beschichtungen auf Stahl und Aluminium | Stahlbau | 6/2000 | 504 | Termine | |
Gehrke, J. | Atmosphärische Korrosion - Beschichten auf Stahl und Aluminium | Stahlbau | 1/2001 | 67-68 | Berichte |
Stimpfle, Bernd | Athens Heart Shopping Mall Piraeus Street 180, Athens (GR), Job Report | Steel Construction | 1/2011 | 41-45 | Reports |
KurzfassungTemporary covered areas in Greece are seen as an open space, and so allow a higher usage of the land. The goal during the design was to find a light roof with direct view to the blue sky. The solution is a north light roof with highly translucent membrane panels and with a transparent cladding on the north side of the parallel steel girders to allow the direct view, and the entrance of the cool northern light. x | |||||
ATC2-Sympoisum | Geomechanics and Tunnelling | 6/2019 | Cover Pictures | ||
KurzfassungThe Dywi Drill Hollow Bar system from DSI Underground is a versatile support element, which can be used as a micropile, soil or rock nail, grouted anchor, spile or grouting lance in mining and tunnelling as well as for geotechnical tasks such as foundations. Recently, DSI got an approval for the Dywi Drill Hollow Bar as a temporary micropile and as a permanent pile, according to which a service life of 100 years can be achieved for a permanent pile (photo: DSI Underground). x | |||||
Urschitz, Gerhard J. | At the Limit - Soft-ground tunnelling under the city highway of Toronto / Am Limit - Lockergesteinsvortriebe unter der Stadtautobahn von Toronto | Geomechanics and Tunnelling | 5/2019 | 440-449 | Topics |
KurzfassungDuring the Design-Build-Finance procurement of the “RER Highway 401 Rail Tunnel”, the option with two single SEM tunnels was selected as preferred alternative. The challenges of this project lie not only in the conditions and requirements by the Ministry of Transportation of Ontario, the owner of the highway above and the existing tunnel beside the new tunnels, but also in construction beneath one of the busiest highways in North America. Pre-support measures for tunnel excavation, which cannot involve any type of grouting directly beneath the roadway surface, were evaluated based on their risk exposure, resulting in the selection of a pipe jacked umbrella above the tunnel crowns. A sophisticated monitoring programme is implemented with online access at any time to allow for immediate response and implementation of pre-determined mitigation measures as required. x | |||||
Zwingmann, B.; Schanack, F.; Marx, S. | Asymmetrische Netzwerkbogenbrücken | Stahlbau | 7/2009 | 471-476 | Fachthemen |
KurzfassungAsymmetrische Netzwerkbögen eröffnen dem entwerfenden Ingenieur neue gestalterische Möglichkeiten bei gleichzeitig guter Wirtschaftlichkeit und hoher Effizienz des Tragwerks. Im Gegensatz zu Stabbogenbrücken mit vertikalen Hängern befindet sich die Stützlinie in Netzwerkbögen ohne Hängerausfall für alle Lastfälle im Bogen. Daher muss die Bogenform nicht einem bestimmten Lastfall angepasst werden und kann asymmetrisch sein. Voraussetzung ist, dass auch dann eine Hängeranordnung entworfen wird, die Hängerausfall vermeidet. Die Schrittgrößen und die technische Machbarkeit entsprechen im Wesentlichen denen von symmetrischen Netzwerkbögen. Mögliche Anwendungsgebiete umfassen asymmetrische Brückenstandorte sowie schiefwinklige Brücken und Brücken mit veränderlicher Breite. x | |||||
Brameshuber, Wolfgang | Assessment, analysis, construction and testing of masonry / Schätzung, Berechnung, Ausführung und Prüfung von Mauerwerk | Mauerwerk | 5/2016 | 338-339 | Editorials |
Krieger, J. | Assessment Procedures for Highway Structures | Bautechnik | 10/2000 | 768-769 | Berichte |
Küpferle, Jakob; Röttger, Arne; Alber, Michael; Theisen, Werner | Assessment of the LCPC abrasiveness test from the view of material science / Bewertung des LCPC-Abrasivitätstests aus werkstofftechnischer Sicht | Geomechanics and Tunnelling | 3/2015 | 211-220 | Topics |
KurzfassungThe abrasiveness of crushed rock is determined in the design phase of a tunnelling project to estimate the wear on excavation and boring tools, using for example the LCPC abrasiveness test. Considered from the point of view of material science, there are problems with the validity of such an index value since important tribological factors, like for example the internal structure of the sample impeller (size, phase composition) are not considered in the current testing standard (AFNOR P18-579). In this investigation, LCPC tests were performed with impellers of various steels of the same and different hardnesses against two abrasives (Mohs hardness 7, 9) in order to determine the influence of the internal structure and the associated tribo-mechanical properties on the LCPC index value (ABR). In addition to the material hardness required by the standard (60 to 75 HRB ≈ 105 to 140 HV 10 according to DIN EN ISO 18265-2013), sample materials with higher hardness values were also used in order to extend the basis of the LCPC abrasiveness index to these practically applicable material groups. The results make clear that awareness has to be raised regarding the materials used for the LCPC test. An abrasive can be classified differently just by using various materials of the same hardness. In order to obtain reliable and reproducible index values for the abrasiveness of crushed rock, it is necessary to consider the influence of materials in future recommendations for the LCPC. x | |||||
Keiper, K.; Crapp, R.; Amberg, F. | Assessment of the interaction of TBM and rock mass in rock tunnelling based on geomechanical calculations / Bewertung der Interaktion von TBM und Gebirge im Felstunnelbau auf der Basis von geomechanischen Berechnungen | Geomechanics and Tunnelling | 5/2010 | 534-546 | Topics |
KurzfassungContinuous tunnelling in rock under deep overburden necessitates - particularly when a tunnel boring machine (TBM) with shield is used - extensive consideration of the processes of stress transfer resulting from the advance of the tunnel. In order to design the constructional layout of the TBM, it must be possible to estimate the actions to be expected on the cutterhead, shield skin and shield tail. x | |||||
Sugiura, K.; Hashimoto, K.; Oshima, Y.; Yamaguchi, T. | Assessment of fatigue cracks in orthotropic steel decks | Steel Construction | 3/2009 | 175-180 | Articles |
KurzfassungThis study proposes a new “health” evaluation system for fatigue cracks in orthotropic steel bridge decks by measuring the strain changes in the asphalt pavements on steel plate decks. In order to consider the applicability of this system, parametric FE analyses are carried out in which the types of crack, their positions and their lengths are varied. From these analytical results it was discovered that the strain changes in the asphalt pavement on steel plate decks due to the lengths and positions of cracks can be significant enough to be detected. x | |||||
Lehmden, Alexander | Assessment of Dryfix masonry adhesive in terms of building physics compared to conventional bonding / Betrachtung der bauphysikalischen Gleichwertigkeit des Dryfix-Planziegel-Klebers | Mauerwerk | 3/2014 | 164-168 | Fachthemen |
KurzfassungDryfix masonry adhesive is celebrating its 10-year anniversary in 2014. The Dryfix system has been introduced to and approved in ten European countries: Austria, Germany, France, Poland, Italy, Slovenia, Croatia, Hungary, Slovakia and the Czech Republic. Every year, 25.000 housing units throughout Europe are built with Dryfix. x | |||||
Aras, F. | Assessment of a steel-based solution for the refurbishment of a historical palace | Steel Construction | 3/2010 | 169-175 | Articles |
KurzfassungThis study aims to present the details of an earthquake-based refurbishment for the historical masonry of Beylerbeyi Palace, which has masonry walls and timber floors. Both the linear and non-linear analyses of the three-storey structure have proven that the timber floor system of the palace causes the structural masonry walls to displace independently and not transmit lateral earthquake loads. One solution to this problem that was tried was the replacement of the timber floor system by steel truss floors. On the other hand, the historical importance of the palace and the minimum intervention principle in the refurbishment of the cultural building stock meant that this strategy had to be limited to the roof of the palace. In doing so, an easy installation process, an undamaged historical fabric and a reversible strategy was expected. In this respect, four different applications of steel floor systems have been investigated for the roof of Beylerbeyi Palace. x | |||||
Eichinger, Stefanie; Leis, Albrecht; Boch, Ronny; Seywald, Christian; Dietzel, Martin | Assessment and formation mechanisms of scale deposits in tunnels of the ÖBB-Infrastruktur AG - A subproject of the Task Force Drainage / Bewertung von Sinter und deren Bildungsbedingungen in Tunnelbauwerken der ÖBB-Infrastruktur AG - Ein Teilprojekt der Task Force Drainage | Geomechanics and Tunnelling | 3/2020 | 273-285 | Topics |
KurzfassungScale deposit formation in drainage systems of railway tunnels represents a major challenge for their functionality and maintenance. The removal of these scale deposits causes high costs and restrictions of system availability. Effective measures to reduce scale deposit formation range from specification of the composition and structure of building materials to the application of tailored prevention and cleaning strategies. This requires advanced knowledge of the origin and type of scale deposits. The aim of this study is a systematic compilation, characterization, classification, and evaluation of scale deposits in relation to their formation mechanisms and the influence of variable environmental factors. The scale deposits from the 16 investigated tunnels mainly consist of the minerals calcite, aragonite, brucite as well as iron (hydr)oxides and detrital components. Four major types of scale deposits are distinguished: (i) unconsolidated-particulate, (ii) shard-like, (iii) porous, and (iv) compact scales. Types (ii) to (iv) show clear indications of microbial activity affecting the formation and appearance of individual deposits by various metabolic processes. The determining factors for the formation of scales - in addition to the geogenic composition of the aqueous solutions in the drainage system (groundwater / surface water) - are the variable interaction of these waters with the binding agents of the building materials used and the tunnel atmosphere. Geogenic conditions and technical-operational specifications of a tunnel determine the type and character of scale deposits, which can be actively influenced based on the case-specific reaction mechanisms by individual adaptations of environmental conditions. x | |||||
Feldmann, Markus; Schaffrath, Simon | Assessing the net section resistance and ductility requirements of EN 1993-1-1 and EN 1993-1-12 | Steel Construction | 4/2017 | 354-364 | Articles |
KurzfassungIn Eurocode 3 the strength functions are derived from simple engineering models, which always require a certain degree of material ductility. With regard to high-strength steels and the accuracy of the design models themselves, several problems are involved due to a lack of sound consideration of the plastification and damage process. Additionally, the current ductility requirements of EC3 obstruct the use of high-strength steels with fy > 500 MPa. Within the current revision of EC3, comprehensive investigations have been conducted to overcome these obstacles. To complement extensive experimental tests, improved numerical methods considering damage mechanics have been used to predict the real plastification and damage process for relevant details. The numerical models were validated by comparing them with experimental results. Subsequently, a parametric study was conducted to investigate the influence of strength and toughness properties separately. It could be shown that the reduction factor of 0.9 to account for the net section resistance can be omitted if cracks can be excluded. Furthermore, it became clear that a strain requirement based on the uniform elongation &egr;u is not appropriate. Moreover, it was revealed that the yield ratio fu/fy has a significant impact on the toughness requirements necessary to reach the full net section resistance. Owing to a lack of minimum upper-shelf toughness requirements in delivery standards, which would secure an appropriate inner damage resistance of the material, a substitution criterion is proposed. x | |||||
Spagnoli, Giovanni; Feinendegen, Martin; Ziegler, Martin | Assessing the clogging potential of clay/additive / mixtures by cone pull-out tests | Geomechanics and Tunnelling | 4/2019 | 362-371 | Topics |
KurzfassungClogging can be a massive problem during the mechanized excavation of tunnels. Soil conditioning with foams and/or polymers is normally used in these cases to decrease the adverse effect of clogging. In a research project the cone pull-out test was used to assess the variation of adherence for four sticky clays with four commercial additives. Results show that the additives have also an impact on the basic mechanical properties of the clays such as liquid limit, plasticity index and shrinkage limit. The tests were performed on the one hand by spraying the additives on the metal surface of the cone and on the other hand by directly mixing them to the clays to reach the critical consistency index (i.e. where the maximum adherence with water was observed). Sprayed cone tests show for two clays a decrease in adherence. However, by directly mixing the additives to the clay, adherence considerably decreases, except for one kaolinitic clay. The results can be useful to select suitable additives or to develop new ones considering the geotechnical and mineralogical properties of the excavated clays. x | |||||
Kieffer, Daniel Scott; Goodman, Richard E. | Assessing scour potential of unlined rock spillways with the Block Scour Spectrum / Beurteilung der Kolkbildung in nicht ausgekleideten Hochwasserentlastungen in Fels mittels des Block Scour Spectrums | Geomechanics and Tunnelling | 5/2012 | 527-536 | Topics |
KurzfassungScour of jointed rock is an important safety issue for dams worldwide, with the cases of Kariba Dam and Ricobayo Dam illustrating the severe consequences of dam and spillway foundation erosion. Leading state-of-the-practice methods for assessing rock scour, such as the Erodibility Index Method and Comprehensive Scour Model, consider the influence of rock mass jointing on scour development, but current models have yet to fully consider the three dimensional mechanics and kinematics of rock block removal. x |