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Böttcher, Christian; Frenz, Matthias; Kaufmann, Henning Iconic Campus of the Zayed University Abu Dhabi Steel Construction 2/2012 108-116 Reports

Kurzfassung

The Emirate of Abu Dhabi is planning for the post-oil era, so education plays a central role in its Master Plan 2030. The new building complex of the Zayed University, intended for 6,000 students, is located in the future Capital District directly on the important connecting road between the Abu Dhabi international airport and the old town peninsular.
Hamburg architects BRT’s (Bothe Richter Teherani) symbolism-rich design moulds the 100.000 m2 GFA ensemble of buildings in the central area into a huge sculpture. The linking element is a jointless free-form roof of 8,000 tonnes of steel with aluminium cladding whose shape and lightness echoes the traditional Arabic chador.
A very short time for design and construction required close cooperation within the international team set up by a main contractor. The project required mastering of numerous engineering challenges, different design philosophies, difficult interfaces between design and construction works on a huge construction site with up to 8,000 workers running in parallel to the design works.

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Dietrich, Andreas; Kern, Andreas; Schäf, Christian New constructional steel for pressure vessels with a high resistance to hydrogen-induced cracking (HIC) Steel Construction 2/2012 117-122 Reports

Kurzfassung

Currently, natural gas with 25 % share of fossil fuels is a very important energy resource. Many gas reserves contain natural gas with a proportion of up to 35 % of hydrogen sulphide (H2S), which can cause hydrogen-induced cracking (HIC).
This paper discusses the development, production and properties of a new steel grade X-COR (eXtra CORosionresistant) for welded pressure vessels, which fit the actual requirements according different standards for pressure vessel steels with up to 355 MPa minimum yield strength very well. The outstanding HIC-resistance is achieved in normalized and stress relieved condition up to a plate thickness of 50 mm. Additionally, important aspects regarding processing behaviour and application of X-COR are highlighted.

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Plieninger, Sven; Chen, Wei Shanghai Oriental Sport Center - SOSC Steel Construction 2/2012 123-129 Reports

Kurzfassung

The following paper is based on a lecture, hold by Magdalene Weiss (gmp von Gerkan, Marg und partner) and Sven Plieninger (schlaich bergermann und partner) at Tongji University Shanghai on 30th November 2011.

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ECCS News: Steel Construction 2/2012 Steel Construction 2/2012 130-133 ECCS News

Kurzfassung

• Conferences
• Announcements
• Technical Committees (TC) activities
• TC News
• New Publications
• ECCS Eurocode design manuals

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Bossenmayer, Horst J. Gerhard Sedlacek died Steel Construction 2/2012 134 People

Kurzfassung

Keine Kurzfassung verfügbar.

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Voormann, Friedmar Before steel: the introduction of structural iron and its consequences. From Rinke, M., Schwartz, J. (eds.) Steel Construction 2/2012 134-136 Book review

Kurzfassung

Keine Kurzfassung verfügbar.

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Contents: Structural Concrete 2/2012 Structural Concrete 2/2012 Contents

Kurzfassung

Keine Kurzfassung verfügbar.

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Dancygier, Avraham N. Engineering a concrete future Structural Concrete 2/2012 71-72 Editorial

Kurzfassung

Keine Kurzfassung verfügbar.

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Toniolo, Giandomenico; Colombo, Antonella Precast concrete structures: the lessons learned from the L'Aquila earthquake Structural Concrete 2/2012 73-83 Articles

Kurzfassung

This paper examines the problems of the seismic design of precast concrete structures as indicated by the effects of the L'Aquila earthquake of 2009. The behaviour of such structures on that occasion is analysed on the basis of detailed surveys performed on site on a relevant number of buildings just after the earthquake.
Following this analysis, which points out the inadequacy of the cladding panel connections, the paper presents a systematic definition of the problem, examining the behaviour of the whole system of structure + panels. Proposals are made for the typology of one-storey buildings for industrial uses, some possible alternative solutions that ensure the stability of all the construction elements. Specific calculations for a typical precast building give the order of magnitude of the forces and/or displacements for which the connections are to be designed.

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Aguiar, Eduardo Aurélio Barros; Bellucio, Ellen Kellen; El Debs, Mounir Khalil Behaviour of grouted dowels used in precast concrete connections Structural Concrete 2/2012 84-94 Articles

Kurzfassung

This research deals with the behaviour of grouted dowels used in beam-to-column connections in precast concrete structures. The research focuses primarily on the theoretical and experimental analysis of the resistance mechanism of the dowels. The experimental programme included 15 models for analysing the following variations in dowel parameters: a) dowel diameters of 16, 20 and 25 mm, b) dowel inclinations of 0° (i.e. perpendicular to the interface), 45° and 60°, c) compressive strength of classes C35 and C50 for the concrete adjacent to the dowels, and d) the absence or presence of compressive loads normal to the interface. The experimental results indicate that the ultimate capacity and shear stiffness of the inclined dowels are significantly higher than those of the perpendicular dowels. Based on these results, an analytical model is proposed that considers the influence of the parameters studied regarding the capacity of the dowel.

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Desnerck, Pieter; De Schutter, Geert; Taerwe, Luc Stress-strain behaviour of self-compacting concretes containing limestone fillers Structural Concrete 2/2012 95-101 Articles

Kurzfassung

Knowledge of the stress-strain relationship of concrete under uniaxial compression is crucial for the design of concrete members. This study focuses on the stress-strain behaviour under compression and especially the strain-softening of self-compacting concretes produced with limestone fillers. Four self-compacting concretes (SCC) and three conventional vibrated concretes (VC) were used to produce cylindrical test specimens with an h/d ratio of 3. The &sgr;-&egr; diagram at five different ages (3-91 days) was recorded during uniaxial compressive tests. The peak strain of the SCC cylinders was shown to be higher than the ones recorded for VC concretes. However, the specific toughness of both concrete types turned out to be comparable.

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Alani, Amir M.; Aboutalebi, Morteza Analysis of the subgrade stiffness effect on the behaviour of ground-supported concrete slabs Structural Concrete 2/2012 102-108 Articles

Kurzfassung

This paper confirms that the structural behaviour of ground-supported slabs is a non-linear function of the structural properties of slabs as well as the supporting soil. The findings reported emphasize that the suggested equations used in design codes pay insufficient attention to the effect of the supporting ground stiffness within the context of the mechanical behaviour of slabs as far as ductility is concerned. The results presented demonstrate that ground stiffness has a significant effect on the ductility of ground-supported slabs. It also pays particular attention to the possibility of determining the ductility limit of slabs.

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Stráský, Jirí; Necas, Radim; Kolácek, Jan Dynamic response of concrete footbridges Structural Concrete 2/2012 109-118 Articles

Kurzfassung

Experience with the analysis and performance of 15 lightweight concrete footbridges is presented from the point of view of their dynamic response caused by moving people. The footbridges are formed either by a stress ribbon or by a slender deck supported by arches or suspended from pylons. The dynamic response was determined according to a procedure given in a 1998 draft of Eurocode 2: Design of Concrete Structures - Part 2: Concrete Bridges. Thirteen footbridges have been built and so far no complaints about their dynamic behaviour have been recorded.

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Torres, Lluis; Neocleous, Kyriacos; Pilakoutas, Kypros Design procedure and simplified equations for the flexural capacity of concrete members reinforced with fibre-reinforced polymer bars Structural Concrete 2/2012 119-129 Articles

Kurzfassung

The predominant failure mode of concrete members reinforced with fibre-reinforced polymer (FRP) bars is flexural, due to either concrete crushing or FRP rupture. Many design tools have been developed for the flexural design of FRP-reinforced concrete. These tools are sufficiently accurate, but an iterative procedure is required when dealing with flexural failure due to FRP rupture. In addition, despite the fact that the design concepts involved are similar to those used for conventional steel-reinforced concrete, the changes in the design philosophy and the linear behaviour up to rupture of the FRP bars lead to the sectional properties having a different influence on the design, which not everyone may be familiar with. Therefore, this study proposes a general methodology for evaluating the design flexural capacity of FRP-reinforced concrete sections. This methodology is based on the design provisions of Eurocode 2 and comprises non-dimensional, closed-form equations, derived independently of the concrete and FRP characteristics. The proposed methodology can be used to derive universal dimensionless design charts as well as tables. The accuracy of the proposed design tools has been verified by comparing the predictions with the experimental results of 98 beams, which are available in the published literature.

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fib-news: Structural Concrete 2/2012 Structural Concrete 2/2012 131-139 fib-news

Kurzfassung

• Latin American seminar on conceptual design and applications of precast concrete structures
• fib days India 2011
• MC2010 presentations
• 3rd International Symposium on UHPC (HiPerMat 2012)
• fib short course: Concrete Structures in Fire, South Africa
• 2013 fib Achievement Award for Young Engineers
• fib Bulletins
• ICCS13, Tokyo: Call for papers
• Ibero-American congress 2012
• What is the “Impact Factor”?
• Short notes
• Congresses and symposia
• Acknowledgement

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Contents: UnternehmerBrief Bauwirtschaft 2/2012 UnternehmerBrief Bauwirtschaft 2/2012 Contents

Kurzfassung

No Abstract.

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Schalk, Günther 2012 - Die Hoffnung stirbt zuletzt? UnternehmerBrief Bauwirtschaft 2/2012 1 Editorial

Kurzfassung

No Abstract.

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Kurz infomiert UnternehmerBrief Bauwirtschaft 2/2012 2 Kurz informiert

Kurzfassung

• Geschäftsklima „aufgehellt”, aber Lage durchwachsen
• „PPP versteckt Schulden in Schattenhaushalten!”
• Empörung über Zahlungsmoral der öffentlichen Hand

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Emmert, Angela; Hamschmidt, Jens Droht bei Diebstahl von Kleinigkeiten die fristlose Kündigung? UnternehmerBrief Bauwirtschaft 2/2012 3-8 Berichte

Kurzfassung

No Abstract.

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"Soli" hat 200 Milliarden Euro eingespielt UnternehmerBrief Bauwirtschaft 2/2012 8 Kurz informiert

Kurzfassung

No Abstract.

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Elektronische Übermittlung ein Muss? UnternehmerBrief Bauwirtschaft 2/2012 9 Berichte

Kurzfassung

No Abstract.

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Lohnsteuerjahresausgleich - "dürfen" oder "müssen"? UnternehmerBrief Bauwirtschaft 2/2012 10 Berichte

Kurzfassung

No Abstract.

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Fuchs, Bastian Aktuelles aus der Rechtsprechung UnternehmerBrief Bauwirtschaft 2/2012 11-13 Berichte

Kurzfassung

No Abstract.

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Ellenrieder, Josef Ohne korrektes Impressum drohen Bußgeld oder teure Abmahnungen UnternehmerBrief Bauwirtschaft 2/2012 14-17 Berichte

Kurzfassung

No Abstract.

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Ist-Versteuerung bei der Umsatzsteuer UnternehmerBrief Bauwirtschaft 2/2012 18-19 Berichte

Kurzfassung

No Abstract.

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