Journal articles
Author(s) | Title | Journal | Issue | Page | Category |
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Steuerberater Marcus Schieritz, St. Augustin | Ab Januar 2006 - Beiträge zur Sozialversicherung früher fällig | UnternehmerBrief Bauwirtschaft | 12/2005 | 14 | |
Schalk, Günther | Ab 2018 funktioniert das Bauen rechtlich anders als bisher | UnternehmerBrief Bauwirtschaft | 6/2017 | 3-9 | Editorials |
AbstractKaum ein neues Gesetzeswerk hat in den vergangenen Jahren so viele Wellen geschlagen und die Gemüter erhitzt wie das neue Bauvertragsrecht. Nach jahrelanger Entstehungsgeschichte mit zum Teil heftigen Auseinandersetzungen hat im März der Deutsche Bundestag das neue Gesetzeswerk nach der zweiten und dritten Lesung beschlossen. Der Bundesrat hat - für viele durchaus überraschend - wenig später das Paket ohne Widerspruch durchgewunken. Zum 1.1.2018 tritt das neue Bauvertragsrecht in Kraft. Was ändert sich? Funktioniert das Bauen rechtlich künftig komplett anders als bisher? In der Bauwirtschaft herrscht Verunsicherung, und schon jetzt wird deutlich: So, wie das Gesetz beschlossen wurde, wird es in manchen Punkten mehr Fragen aufwerfen als Antworten geben. Der UBB gibt einen Überblick über die wichtigsten Fakten und Neuerungen. x | |||||
Ab 2013 Authentifizierung nötig | UnternehmerBrief Bauwirtschaft | 10/2012 | 15 | Berichte | |
Ab 1998: BImSchV verschärft Grenzwerte | Bauphysik | 5/1997 | 158 | Aktuelles | |
Aachener Dressurstadion | Stahlbau | 8/1999 | 686 | Berichte | |
Lenz, F.; Marcher, T.; Neumayr, T. | A9 Bosruck Tunnel - design approaches for swelling rock / A9 Bosrucktunnel - Dimensionierungsansätze im quellenden Gebirge | Geomechanics and Tunnelling | 5/2010 | 597-608 | Topics |
AbstractConstruction works were started for the 2nd tube of the Bosruck road tunnel on the A9 Pyhrn motorway in December 2009, as part of the ongoing upgrade to full motorway standard by ASFINAG. In the course of the more than 100-year history of tunnelling under the Grosse Bosruck, this tunnel is the fourth tunnel to be built in this part of the central mountain range of the Eastern Alps. The 4,766 m long single-track railway tunnel was constructed between 1901 and 1906, the ventilation and drainage tunnel for the road tunnel between 1978 and 1980, and the approximately 5,500 m long road tunnel for two-way traffic was constructed between 1980 and 1983. x | |||||
A2: Autobahnsanierung in 88 Stunden | Beton- und Stahlbetonbau | 11/2020 | 877 | Nachrichten | |
Sempelmann, Franz; Edlmair, Gerald | A26 Linz motorway - Past and future challenges / A26 Linzer Autobahn - Herausforderungen im Rückblick und Ausblick | Geomechanics and Tunnelling | 6/2022 | 720-727 | Topics |
AbstractAfter a long design and approval process, the construction works for the first phase of the A26 started in 2019. The A26 not only relieves the central part of the road network of the city of Linz but also allows the river Danube to be crossed by means of a bridge: a 300 m long bridge, anchored in the rock slopes forming the banks of the Danube. The elements of the first phase are the Danube bridge and the two underground motorway junctions, Danube North and South, with excavation cross-sections of up to 400 m2 and the tight radii of the motorway on-ramps. Besides these conditions, urban planning requirements such as the protection of residents against immissions caused by noise and vibration, and the increased negative impacts resulting from the traffic during construction have an effect on the construction works. The excavated material from the tunnel is transported off site by ship. The existing rock mass requires excavation by means of the drill-and-blast method. The project-specific boundary conditions such as the high number of portals, the noise-reflecting effect of the “Danube gorge” and the low overburden require substantial measures to limit and monitor the immissions. x | |||||
A wavelet-based approach for describing the mechanical behaviour of cellular beams | Stahlbau | 2/2021 | 137 | Empfehlungen der Redaktion | |
Rajana, Komal; Alonso-RodrÃguez, Andrés; Tsavdaridis, Konstantinos Daniel | A wavelet-based approach for describing the mechanical behaviour of cellular beams | Steel Construction | 1/2021 | 47-54 | Articles |
AbstractThis paper describes how a wavelet model comprised of a linear combination of sine terms is capable of representing the cross-section inertia variation along the length of cellular beams. This allows the efficient computation of deflections of cellular beams when these are deployed as a part of steel-concrete composite flooring systems. This method does not involve purely statistical approaches or piece-wise integration of moment-curvature relationships that lead to cumbersome matrix approaches and complicate the assessment of deflections. Despite its simplicity, the proposed approach is found to be reliable as it successfully predicts displacements obtained through finite element model representations of more than 260 cases with errors smaller than ±5 %. Furthermore, the proposed analytical description of cross-section inertia along the beam length is defined by only three parameters that can be inferred through linear expressions considering the geometrical characteristics of a perforated beam, namely, the ratio of flange to web thickness, the second moment of inertia of the steel beam and the ratio between beam length and depth, making it easy for widespread application by practitioners. x | |||||
Fruton, Hadrien; Wallasch, Karl | A unique fire safety strategy for a penthouse | Bauphysik | 3/2015 | 196-200 | Berichte |
Fruton, Hadrien; Wallasch, Karl | A unique fire safety strategy for a penthouse | Bauphysik | 3/2015 | 196-200 | Bericht |
Höglund, Torsten | A unified method for the design of steel beam-columns | Steel Construction | 4/2014 | 230-245 | Articles |
AbstractIn Eurocode 3, Part 1-1 [1] two methods are given for the design of beam-columns. They have been criticized for their complexity. Furthermore, internal plastic redistribution of stresses of class 3 cross-sections is not utilized in the code. These shortcomings were resolved in proposal for amended rules in [5], however, the procedures for beam-columns are still complicated and difficult to understand. x | |||||
Van De Walle, Wouter; Janssen, Hans | A thermal conductivity prediction model for porous building blocks | Bauphysik | 6/2016 | 340-347 | Fachthemen |
AbstractA 3D model for the prediction of the effective thermal conductivity of porous building blocks is introduced. Simulations are performed directly on the microstructure using voxel images and the finite element technique. Very good agreement with analytical solutions is achieved. The model is used to investigate the miscalculation effect of 2D simulations, clearly indicating the need for a 3D model. Furthermore, a method for incorporating radiative heat transfer at the microscale is implemented and applied on a synthetic sample, demonstrating the influence of thermal radiation on the effective thermal conductivity. x | |||||
Abbasnia, Reza; Nav, Foad Mohajeri | A theoretical method for calculating the compressive arch capacity of RC beams against progressive collapse | Structural Concrete | 1/2016 | 21-31 | Technical Papers |
AbstractCompressive arch action is one of the main resistance mechanisms against progressive collapse in reinforced concrete (RC) buildings. Hence, many studies have investigated the development of arching action in RC beams and frames but less attention has been paid to calculating the corresponding enhancement in structural capacity. In the present study, a theoretical method is introduced in order to calculate the arching capacity of RC beams and also to obtain a quantitative assessment regarding structural robustness against progressive collapse. The proposed method is validated using the experiments in the literature. The evaluation indicates that the procedure introduced here could establish a reliable foundation for estimating the arching capacity of beams and also structural robustness. x | |||||
Rangelov, N. | A Theoretical Approach to the Limiting of Initial Imperfections in Stel Plates (Näherungen für Höchstwerte von Vorverformungen bei Platten). | Stahlbau | 5/1992 | 151-156 | Fachthemen |
AbstractEs wird über eine Auswertung und Beurteilung der Höchstwerte von Vorverformungen beulgefährdeter Platten berichtet. Daraus ergibt sich, daß die bisherigen Angaben der zuläsigen Imperfektionsgrenzen in den verschiedenen internationalen Normen für schlanke Platten als zu streng und zu unwirtschaftlich anzusehen sind. x | |||||
Gamba, Francesco; Brino, Lorenzo; Triclot, Jacques; Hugot, Elsa; Barla, Giovanni; Martinotti, Giorgio | A TBM assembly cavern in the French Alps | Geomechanics and Tunnelling | 3/2017 | 256-264 | Topics |
AbstractThis paper deals with the cross-border section of the Lyon-Turin Line, i.e. the 57.5 km long Mont Cenis Base Tunnel between Saint Jean de Maurienne in France and the Susa valley in Italy. Works at Saint Martin La Porte started in 2015 including the 9 km TBM excavation along the south tube of the base tunnel between the access adits of Saint Martin La Porte and La Praz. In order to assemble the TBM, a large underground cavern has been excavated at the end of the Saint Martin La Porte access adit. The size of this cavern, with a length of approximately 45 m, a span of 23 m and a height of 22.2 m, and the geological and geomechanical conditions in the Carboniferous Formation at a depth of about 600 m made this work a challenge. The excavation and support methods adopted are described, together with the rock mass conditions and the observed ground behaviour. The monitoring data obtained during excavation are briefly presented, including the works schedule. x | |||||
Sjaarda, Matthew; Meystre, Thierry; Nussbaumer, Alain; Hirt, Manfred A. | A systematic approach to estimating traffic load effects on bridges using weigh-in-motion data | Stahlbau | 7/2020 | 585-598 | Aufsätze |
AbstractIn contrast to the Swiss load model used for new bridge structures (SIA 261), which has roots in a Europe-wide weigh-in-motion (WIM) study and considers the full design life of new structures, the model for existing structures (SIA 269) from 2005 is derived from load effects produced by traffic measured by country-specific WIM observations and considers a reduced return period. With growing concerns regarding the scarcity of resources, efforts should be made to ensure safety by increasing the knowledge of loads and load-carrying mechanisms, rather than through overdesign. This paper presents the methodology employed to use WIM data for generating maximum expected load effects on bridges and thus give engineers a tool with which bridge load effects can be accurately derived from real traffic. A re-evaluation using the methodology outlined here began this year. It is planned to use the results of this for the next revision of the Swiss National Annexes to the Eurocodes and SIA 269. x | |||||
Takenaka, H.; Kishida, H.; Nakai, H. | A Study on New Composite Girder using Prestessed Precast Concrete Slab by PPCS Method (Verbundträger mit vorgespannten, vorgefertigten Betonplatten - PPCS-Methode). | Stahlbau | 6/1986 | 165-174 | Fachthemen |
AbstractBerichtet wird über eine neue Idee für Verbundträger, kurz PPCS-Methode. Es werden die experimentellen Untersuchungen und numerischen Vergleichsrechnungen bei Einfeldträgern vorgestellt. Ferner wird auf die Verwendung der Methode bei Durchlaufträgern eingegangen und ihre praktische Anwendung bei einer Fußgängerbrücke gezeigt. Zum Konzept der PPCS-Methode:- Die einzelnen Betonfertigteilplatten werden auf die Stahlträger aufgelegt und die Fugen mit Epoxidharzkleber oder Zementmörtel vergossen. Nachträglich wird die Betonplatte dann mit in Hüllrohren liegenden Spanndrähten vorgespannt. - Die im Bereich der Schubdübel vorhandenen Löcher werden mit Zementmörtel verfüllt und somit der Verbund hergestellt. - Nach hergestelltem Verbund wird die Vorspannung reduziert und damit eine Zugkraft und ein negatives Biegemoment in den Verbundträger eingeleitet. x | |||||
Ozaki, Fuminobu | A study on a theoretical relationship between strain hardening of steel and plastic region length in a steel beam subjected to fire | Stahlbau | 9/2014 | 652-656 | Fachthemen |
AbstractThis paper presents a relationship between strain hardening of steel and plastic region length in a steel beam subjected to fire. A theoretical simple fire response analysis is proposed to investigate elasto-plastic behavior of the statically indeterminate heated beam. From observation of parametric calculations, it is clarified that large plastic region length in the beam, which is induced by the large strain hardening, is effective to avoiding strain concentration. This contributes to the robust attenuation of the thermal stress at the fire. x | |||||
Ishikawa, H.; Konno, H.; Mitamura, H. | A study of the new construction method for transverse box culverts by using the steel-concrete composite sandwich deck slab - cutting the cost of constructing expressways | Steel Construction | 3/2009 | 167-174 | Article |
AbstractExpressways are typically constructed on high embankments to accommodate transverse box culverts. If the embankment height could be reduced while still accommodating culverts, then the road construction costs could be lowered by reducing the required volume of embankment soil. The authors achieved this by devising a transverse box culvert whose steel-concrete composite sandwich deck slab resembles the composite slabs used for road bridges. x | |||||
Chen, L.; Doerich, C.; Rotter, J. M. | A study of cylindrical shells under global bending in the elastic-plastic range | Steel Construction - Design and Research | 1/2008 | 59-65 | Articles |
Ramos, LuÃs F.; Lourenço, Paulo B.; Vermeltfoort, Ad. T.; Moreira, Susana | A students' challenge for the estimation of the maximum compressive load of masonry prisms / Studentenwettbewerb zur Ermittlung der maximalen Druckfestigkeit von Mauerwerksprismen | Mauerwerk | 5/2016 | 352-363 | Fachthemen |
AbstractThe paper presents the “IMC Students' Challenge” competition held in 2014, during the 9th International Masonry Conference, in Guimarães. The objective of the competition was to predict the maximum compressive load of two masonry prisms built of solid bricks, and of hollow blocks, with mortar joints. To increase the complexity of the problem, all prisms were tested under eccentric load. The students, who enthusiastically participated in the final laboratory tests, presented different approaches to estimate the maximum eccentric compressive force on masonry prisms. The challenge was a great experience, not only for students and conference participants, but also for sponsors and organizers. x | |||||
Heinisuo, Markku; Perttola, Henri; Ronni, Hilkka | A step towards the 3D component method for modelling beam-to-column joints | Steel Construction | 1/2014 | 8-13 | Articles |
AbstractThis paper deals with the component method for the structural design of steel joints in the 3D modelling of loads. The essential features of the method are presented in terms of the local and global analysis model. There is a discussion about the location of the local joint model, the definition of generalized joint displacements and the generic nature of the method. The proposed method is verified for a beam-to-column joint. Verification is carried out by a detailed 3D non-linear finite element analysis of a single joint. Other results in the literature are discussed briefly. One of the new components used in 3D modelling is introduced here. The proposed 3D component method seems to work rather well for moment resistances of joints in both ambient and fire conditions. Initial rotational stiffness needs to be studied more. Validation of the 3D component method is continuing with experiments on the end plate splice joints of rectangular tubular structures. x | |||||
Yemez, K.; Altay, G. | A steel frame connection: I-beam to SHS column via bolted T-stub | Steel Construction | 3/2010 | 148-153 | Articles |
AbstractThis paper presents the outcome of an experimental study carried out by the authors on the performance of a connection between an I-beam and a square hollow section (SHS) column. In the light of practical and economic bolted field applications and transportation without damage by leaving the column exterior without projections, an appropriate joint type composed of T-stub connecting elements was studied. These connecting elements were bolted with long partially threaded studs passing through the SHS column. In order to observe the performance of the joint, four full-scale beam-column tee-joint specimens were tested under monotonic and cyclic loading in two groups. As a parameter, the rear face of the SHS column in the area of the connection was reinforced by backing plates in the second group of specimens. The results obtained are provided in terms of moment-rotation relationship and energy dissipation capacity. All specimens reached beam plastic load level at high deformation levels. Reinforcing the SHS column rear face with a backing plate resulted in an increase in strength and initial stiffness but a reduction in the energy dissipation capacity of the joint. Considering the overall cyclic performances, both joints maintained high plastic rotations in adequate resistance levels with acceptable energy dissipation capacities; consequently, they are suitable for use as semi-rigid partial strength joints in simply designed, braced steel frames in seismic regions or in unbraced steel frames in regions with less seismic activity. Additional component tests were carried out to understand better the component behaviour of the hollow section face in bending and to try to design component modelling parameters. The influence of bolt spacing and the distance between bolt rows on the resistance of the square hollow section face in bending was examined. As expected, when the bolts were closer to the sidewall, the resistance of the face increased. x |