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Autor(en) Titel Zeitschrift Ausgabe Seite Rubrik
Greiner-Mai, Doris Klaus-Jürgen Schneider verstorben Stahlbau 4/2015 295 Persönliches

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Keine Kurzfassung verfügbar.

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Staeck, Klaus Akademie der Künste trauert um Frei Otto Stahlbau 4/2015 295-296 Persönliches

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Keine Kurzfassung verfügbar.

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Fritz Leonhardt Preis 2015 an Werner Sobek Stahlbau 4/2015 296 Persönliches

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Keine Kurzfassung verfügbar.

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Aktuell: Stahlbau 4/2015 Stahlbau 4/2015 296-298 Aktuell

Kurzfassung

Deutscher Brückenbaupreis 2016 ausgelobt
DVS/DIN-Workshop zur DIN EN ISO 9606-1
Hochbaukultur in Berlin - Tragwerke
Einsatz von libanesischen Ingenieuren in Baden-Württemberg

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Termine: Stahlbau 4/2015 Stahlbau 4/2015 298 Termine

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Keine Kurzfassung verfügbar.

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Content: Steel Construction 4/2015 Steel Construction 4/2015 Content

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Keine Kurzfassung verfügbar.

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Stranghöner, Natalie Tensile membrane structures Steel Construction 4/2015 221 Editorial

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Keine Kurzfassung verfügbar.

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Uhlemann, Jörg; Stranghöner, Natalie; Saxe, Klaus Comparison of stiffness properties of common coated fabrics Steel Construction 4/2015 222-229 Articles

Kurzfassung

Woven coated fabrics commonly used for tensile membrane structures are PVC-coated polyester fabrics and PTFE-coated glass-fibre fabrics. Regarding the stiffness of these materials, membrane structure experts frequently point out that glass/PTFE fabrics are “stiffer” than PES/PVC fabrics. However, this statement cannot be verified by existing literature, although numerous publications deal with the stress-strain behaviour of coated woven fabrics. Available stress-strain test data are almost impossible to compare, mainly because published stress-strain data for glass/PTFE refer to materials with higher strengths than the published test data for PES/PVC materials. The aim of the present paper is to compare the stiffness properties of PES/PVC and glass/PTFE fabrics with identical tensile strength properties by means of theoretical investigations and uniaxial tensile tests. The results demonstrate that glass-fibre fabric indeed exhibits a higher tensile stiffness than comparable polyester fabric for typical working stress ranges between the prestress level and the maximum design strength. However, for lower stress ranges up to approximately three-quarters of the design strength, the tensile stiffness of glass-fibre fabrics is identical with or even lower than that of comparable polyester fabric. The transverse strain is considerably higher for the glass-fibre fabric throughout.

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The European Prize for Architecture 2015: Laureate Santiago Calatrava Steel Construction 4/2015 229 People

Kurzfassung

Keine Kurzfassung verfügbar.

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Stimpfle, Bernd The Nuvola for the Nuovo Centro Congressi in Rome Steel Construction 4/2015 230-236 Articles

Kurzfassung

In the EUR district, in the city of Rome, a complex membrane project is built, different from known tensile projects. In more than 10 years the idea of a light floating cloud inside the glazed congress centre has been developed, and is now going to be realized. This article describes the design process of shape and detail, different trial assemblies and it shows the final layout and the details.

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Göppert, Knut; Paech, Christoph High-performance materials in façade design - Structural membranes used in the building envelope Steel Construction 4/2015 237-243 Articles

Kurzfassung

Modern materials are used throughout large building envelopes of today’s and tomorrow’s architecture. Freedom in form combined with the growing selection of materials make this application very popular. Material properties are presented and discussed to allow the specialist engineer to make the right decision when consulting owners and architects. Basic considerations and requirements can take the form of a checklist to make sure that all involved in the design process have the full background and understanding of this process. The presented case studies show a variety of solutions, including some typical material combinations. Clients will be convinced by what they see, and the examples provide an opportunity to further develop the subject, starting from a good base and understanding. The examples cover all common materials and methods, including ETFE, glass-PTFE, PVC polyester, glass-PTFE mesh as well as multi-layer insulated systems.

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Gibson, Nick D. How to get a membrane structure off the drawing board Steel Construction 4/2015 244-250 Articles

Kurzfassung

This paper highlights the processes that are required to take a membrane structure from the design stage to final fabrication. Those processes involve determining the final geometry, developing an approved seam layout, undertaking material tests to determine stretch characteristics and issuing a final set of fabrication documents. The importance of each step is highlighted and the particular issues as they relate to membrane structures are presented. Particular note is made of the benefit that previous experience in this unique form of construction has in bringing a membrane structure to a successful completion. The paper concludes with a few examples of just what can be achieved when all the final stages of fabrication are carefully followed.

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6th Steelie Awards winners announced Steel Construction 4/2015 250 News

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Keine Kurzfassung verfügbar.

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Mollaert, Marijke; De Laet, Lars; Pyl, Lincy; Devos, Rika The design of tensile surface structures - From a hand calculation in 1958 to a contemporary numerical simulation Steel Construction 4/2015 251-258 Articles

Kurzfassung

This paper summarizes the differences in the design approaches for tensile surface structures between the earliest structures in the 1950s and today’s practice. Current software tools allow more refined and advanced calculations. Nevertheless, a basic hand calculation can clarify the process in a few pages and provide the appropriate key data. A transparent setup allows the form-finding and structural analysis to be redone. The calculation of the cable net for the bandstand by André Paduart (1958) is analysed in this paper as a case study. Both the hand calculation (19 pages) and the numerical simulation are summarized and the design context of the initial and current calculations are described. The approximations made by Paduart resulted in a remarkably intelligible and coherent evaluation of the cable net structure. The historical approach can still be applied for a first verification of a pretensioned cable net or for a membrane structure as the simplified calculation method is similar.

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Beccarelli, Paolo; Maffei, Roberto; Galliot, Cédric; Luchsinger, Rolf H. A new generation of temporary pavilions based on Tensairity girders Steel Construction 4/2015 259-264 Articles

Kurzfassung

This paper provides a detailed overview of the design and construction of a series of temporary pavilions based on the Tensairity® principle. The pavilions are currently used in the Superbike racing category (Ducati Superbike Team), for the Audi tron Sailing Series, the ISAF Sailing World Cup and for other temporary events (3KIT pavilion). The paper describes the Tensairity® principle, the architectural and structural design of the pavilions, the manufacturing of the components and the assembly of the Tensairity® roofs.

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Announcement: Steel Construction 4/2015 Steel Construction 4/2015 264 Announcement

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Keine Kurzfassung verfügbar.

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ECCS News: Steel Construction 4/2015 Steel Construction 4/2015 265-275 ECCS News

Kurzfassung

Events
Technical Committees (TC) activities
TC News
Further ECCS news

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Rubin, Helmut Jubilee prize competition Steel Construction 4/2015 276 Jubilee prize competition

Kurzfassung

Keine Kurzfassung verfügbar.

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Contents: Structural Concrete 4/2015 Structural Concrete 4/2015 Contents

Kurzfassung

Keine Kurzfassung verfügbar.

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Vyncke, Johan Working together, we can reach further... Structural Concrete 4/2015 447-448 Editorial

Kurzfassung

Keine Kurzfassung verfügbar.

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Flindt Jørgensen, Kåre Bella Sky Hotel - exploring the potential in precast concrete design Structural Concrete 4/2015 449-457 Technical Papers

Kurzfassung

The Bella Sky Hotel comprises two towers both leaning at an angle of 15 degrees. This inclination introduces enormous forces throughout the building which posed huge challenges for the design. Moreover, the building is made of precast concrete elements, which led to further major design hurdles. A full 3D linear elastic FE (finite element) model modified to approximate non-linear support conditions was used for the design of the hotel. Detailed design was carried out using specific post-design programs. These programs were developed for handling the design of lintels, in-plane forces, stability, horizontal joints, vertical joints and joint reinforcement. The large forces in the building require a substantial amount of reinforcement and thus several complex geometric design solutions. For Rambøll the design has been the start of a new era for building design employing in situ and precast concrete.

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Orr, John J.; Pask, Dominic; Weise, Karsten; Otlet, Mike Birmingham Gateway: structural assessment and strengthening Structural Concrete 4/2015 458-469 Technical Papers

Kurzfassung

Birmingham New Street is the busiest UK rail station outside of London. Growing demand following upgrade works to the West Coast Main Line has seen passenger numbers exceed the design capacity of the current station, which was constructed in 1967. To meet projected increases in passenger numbers, a redevelopment of the historic station is currently underway. Retaining all major structural features, the redevelopment is being undertaken over a live railway in the heart of Birmingham while maintaining existing passenger capacity.This paper describes the structural assessment and strengthening design work undertaken to facilitate the regeneration of Birmingham New Street. The assessment methodologies used in examining this historic concrete structure are discussed before the design of subsequent strengthening works is presented.

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Burdet, Olivier; Einpaul, Jürgen; Muttoni, Aurelio Experimental investigation of soil-structure interaction for the transition slabs of integral bridges Structural Concrete 4/2015 470-479 Technical Papers

Kurzfassung

This paper presents the results of an experimental test series carried out to investigate the soil-structure-pavement interaction in the vicinity of the transition slab at the end of an integral bridge. The main function of transition slabs is to ease the transition between the bridge deck and the embankment in the case of differential settlement. Additionally, in the case of integral bridges, transition slabs can solve the problem of moderate imposed longitudinal deformations at the bridge ends. In this case the displacements imposed on the transition slab can lead to vertical and longitudinal surface displacements and to cracking of the pavement. Based on the observed behaviour, some recommendations are proposed for the geometry and surface conditions in order to optimize the behaviour of transition slabs.

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Stanislaw Urban, Tadeusz; Goldyn, Michal Marcin Behaviour of eccentrically loaded high-strength concrete columns intersected by lower-strength concrete slabs Structural Concrete 4/2015 480-495 Technical Papers

Kurzfassung

This paper presents the results of experimental investigations of high-strength concrete edge and corner columns intersected by concrete slabs. The effect of the intersection by weaker slab concrete on the load-carrying capacities of reinforced concrete columns is investigated. The only parameter considered was the location of the column with respect to the edge of the slab. It is stated that providing a small slab overhang beyond the column edge makes it possible to increase the actual strength of the joint concrete significantly. The results of the authors' research clearly demonstrate that providing a sufficiently large slab overhang allows the designer to treat edge and corner column-slab connection joints in the same way as internal joints. Existing code provisions concerning strength of concrete in edge and corner column-slab connection joints are in some cases too conservative and require clarification.

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Dawood, Eethar Thanon; Hamad, Ali Jihad Toughness behaviour of high-performance lightweight foamed concrete reinforced with hybrid fibres Structural Concrete 4/2015 496-507 Technical Papers

Kurzfassung

Lightweight foamed concrete (LWFC) is a concrete having structural strength with lightweight density and high flowability. High-performance lightweight foamed concrete (HPLWFC) is used in modern concrete technology and intensively in the construction of high-rise buildings, long-span concrete structures, road sub-bases and other applications. The present work deals with the fresh and hardened properties of LWFC. The fresh properties of LWFC are measured with the flow and fresh density tests. The hardened properties tests include compressive strength, flexural strength, flexural toughness, static modulus of elasticity, ultrasonic pulse velocity, water absorption and oven-dry density. In addition, the study focuses mainly on the effect of the fibres added to LWFC mixes. Two types of fibre have been used: glass fibres and polypropylene fibres, and the combination of glass fibres (GF) and polypropylene fibres (PPF) to obtain hybrid fibres (GF+PPF).This study also focuses on the effect of hybrid fibres on the flexural toughness of HPLWFC. Trial mixes have been used to choose the optimum mix. The definition for choosing the best mix depended on three parameters: oven-dry density, flowability and compressive strength. The volume fraction of glass and polypropylene fibres are 0.06, 0.2, 0.4 and 0.6 %, and 0.2, 0.6, 1 and 1.4 % respectively. The percentages of hybrid fibres “GF + PPF” are “0.2 + 0.6”, “0.4 + 0.6”, “0.2 + 1” and “0.4 + 1” %. The results show that the greatest increments in the compressive and flexural strengths of LWFC are 51 and 21 % respectively due to the use of 0.6 % glass fibres. On the other hand, LWFC reinforced with polypropylene fibres exhibits only a minor increase in compressive, splitting tensile and flexural strengths. The best percentage of hybrid fibres yielding the highest increment in LWFC is “0.4 % GF + 0.6 % PPF”. The results of flexural toughness tests indicate that the polypropylene fibres denote a higher efficiency in the flexural toughness than is the case with glass fibres. The flexural toughness results increase with the volume fraction of the fibres. The hybridization shows the best flexural toughness values due to the cooperative work of the glass and polypropylene fibres boost the performance of flexural toughness in pre-crack and post-crack zones. Therefore, the use of 0.4 %GF + 1 %PPF gives the best results in this regard.

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