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Author(s)TitleJournalIssuePageCategory
Kathage, Karsten; Lindner, Joachim; Misiek, Thomas; Schilling, SivoA proposal to adjust the design approach for the diaphragm action of shear panels according to Schardt and Strehl in line with European regulationsSteel Construction2/2013107-116Articles

Abstract

In Germany the stiffness and resistance of diaphragms used for stabilizing members are traditionally calculated according to the Schardt and Strehl approach. Compared with the approach of Bryan and Davies given in the ECCS Recommendations, it does not take into account the flexibility of the connections. This paper shows how to amend Schardt and Strehl’s approach to include this flexibility, leading to more realistic values of diaphragm stiffness. The article also introduces new procedures for the calculation of the resistance, adopted from European standards and recommendations. Finally, both a test and an example taken from the literature are recalculated for comparison.

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European steel market 2012Steel Construction2/2013116News

Abstract

No short description available.

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Camotim, Dinar; Basaglia, CilmarBuckling analysis of thin-walled steel structures using generalized beam theory (GBT): state-of-the-art reportSteel Construction2/2013117-131Articles

Abstract

This paper addresses the use of generalized beam theory (GBT) to analyse the local and global buckling behaviour of thin-walled steel members and structural systems. After a brief historical perspective of GBT developments, the main concepts and procedures involved in performing buckling analyses are summarized in a systematic fashion. That is followed by a state-of-the-art report concerning the most recent GBT formulations and applications that have been developed to assess the buckling behaviour of members, frames and trusses with various loading and support conditions. In order to illustrate the unique modal features and show the potential of the GBT approach to buckling analysis, numerical results and a few practical applications are presented and discussed; for validation purposes, most of these results are compared with values yielded by shell finite element analyses, performed in the ABAQUS and ANSYS programs. The paper closes with a few words on the future perspectives of GBT-based buckling analysis.

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Third International Conference "High Strength Steels for Hydropower Plants - Design Concepts - Pressure Conduits"Steel Construction2/2013131Announcement

Abstract

No short description available.

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Roure, Francesc; Somalo, Maria Rosa; Casafont, Miquel; Pastor, Maria Magdalena; Bonada, Jordi; Peköz, TeomanDetermination of beam-to-column connection characteristics in pallet rack structures: a comparison of the EN and ANSI methods and an analysis of the influence of the moment-to-shear ratiosSteel Construction2/2013132-138Articles

Abstract

No short description available.

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Nagy, Zsolt; Gîlia, Lucian; Ballok, RobertRomanian application of cold-formed steel beams with screwed corrugated websSteel Construction2/2013139-143Articles

Abstract

Cold-formed steel members are used in a wide variety of applications, both residential and industrial, due to their high strength-to-weight ratio. This paper introduces an innovative steel structural solution used in a portal frame configuration. The frame is made from cold-formed steel beams with screwed corrugated web and SHS columns. Very good structural performance was achieved, proved by way of tests on such beams carried out previously at the Technical University of Cluj-Napoca
A finite element analysis was carried out in Abaqus using available, accurate, test-based calibrated FE models [1]. The same settings, mesh size, contacts, connectors and material definitions were used. Material stress-strain curves obtained from coupon tests and a theoretical curve were determined; both types were used in the FE analysis for the definition of the material. A monotonic test will be performed on the proposed structural configuration. The paper concludes with advice on how to set up theoretical stress-strain curves for design assisted by FEA of such kinds of girder. A case study presents one particular proposed structure, analysed by the authors and built for a warehouse application.

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Lessons to be learned: EUROFER on 2030 climate and energy policies frameworkSteel Construction2/2013143News

Abstract

No short description available.

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Leach, Philip; Weekes, LaurenceAxial capacity of perforated steel columnsSteel Construction2/2013144-149Articles

Abstract

A research group has recently been formed at the University of Salford with the general aim of investigating lightweight structures. The first task of the group is to look at the behaviour of perforated steel columns used for storage racking.
The steel columns used in storage racking are made from perforated light gauge steel, with the perforations facilitating the connection of the storage racking beams. Recent work by Casafont et al. [1] has investigated the axial capacity of such members by a combination of testing and calculation, whereas another approach has been reported by Dinis et al. [2].
This paper describes the initial work of the group, investigating the possibility of assessing such capacity by using Eurocode 3 [3] equations to calculate the failure load of the column, using a critical buckling load that allows for the perforations in the column [4]. Critical buckling loads are calculated using both generalized beam theory and finite element analysis.
The use of generalized beam theory is illustrated for problems of varying complexity, from a very simple uncoupled solution with one equation up to the final coupled finite difference eigenvalue solution.
The paper concludes that it is currently possible to predict the capacity within a 15 % margin, and that further work could indeed improve this.

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ISISE report 2010-2012 is now availableSteel Construction2/2013149News

Abstract

No short description available.

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Puthli, Ram; Packer, Jeffrey A.Structural design using cold-formed hollow sectionsSteel Construction2/2013150-157Articles

Abstract

This paper reviews the differences between the alternative types of structural hollow section products (cold-formed versus hot-finished) as they affect structural design in Europe, using the relevant product and design standards, with an emphasis on Rectangular Hollow Sections (RHS). Manufacturers of cold-formed structural hollow sections (CFSHS) are more numerous, so that their products are more widely available. Hot-finished structural hollow section (HFSHS) products are typically between 24 % and 54 % more expensive in Germany than their cold-formed counterparts, the lower differences being for large tonnages - a strong inducement in favour of CFSHS. The price difference may also vary within the European Union. The geometric and product properties which are distinctly unique to CFSHS are presented and shown to offer no restrictions in their use when in compliance with the appropriate clauses in the European standards. These are the influence of corner radii, welding in the corner area, material choice to avoid brittle fracture and suitability for welding CFSHS. A comparison of the structural performance of CFSHS and HFSHS shows equally efficient structural designs for both products. The points covered are the design of compression members - unfilled and concrete-filled, joint resistance - which typically governs selection of member sizes, as well as fatigue design, fire design and the resistance of braced steel frames to severe seismic loading. CFSHS are shown to be adequate under all these situations.

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January 2013 crude steel productionSteel Construction2/2013157News

Abstract

No short description available.

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Korbelá , Jaroslav; Kroupar, Miroslav; Ryjácek, Pavel; Schindler, JiriSteel superstructure saves concrete arch bridge over the River Ohre, Czech RepublicSteel Construction2/2013158-162Reports

Abstract

This paper describes the design and construction of the unique widening of a concrete arch bridge over the River Ohe using a lightweight steel superstructure. The bridge reconstruction formed part of the wider reconstruction measures for road I/6, including its upgrade from a two- to a four-lane highway, near Loket between Nové Sedlo and Sokolov in the north-west of the Czech Republic. Details of the erection of the steel structure and the strengthening of the concrete arch and piers are also given.

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Anistoroaiei, Christian; Heymel, Ulrich; Jung, Rolf; Sagner, Michael ErikBridge across the Lochkov Valley, Prague Ring Road - a strutted frame construction of a special kindSteel Construction2/2013163-170Reports

Abstract

This bridge, which connects Slivenec with Lahovice, is the project that completes the highway bypass south of Prague, in the Lochkov Valley. The bridge structure is 425.3 m long, 35 m wide and reaches a maximum height of almost 65 m. From both the architectural and engineering points of view, the bridge is an unusual design, with a curved composite structure supported by inclined concrete piers in the central span.

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Announcement: Steel Construction 2/2013Steel Construction2/2013170Announcement

Abstract

No short description available.

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ECCS News: Steel Construction 2/2013Steel Construction2/2013171-174ECCS News

Abstract

Conferences
Announcements
Technical Committees (TC) activities
TC News
ECCS News

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Puthli, RamProfessor Jacob Wardenier reaches 70Steel Construction2/2013175People

Abstract

No short description available.

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Pirttijoki, JannePekka Ritakallio retiredSteel Construction2/2013175-176People

Abstract

No short description available.

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Content: Steel Construction 1/2013Steel Construction1/2013Content

Abstract

No short description available.

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Dubina, Dan; Grecea, Daniel7th International Workshop on Connections in Steel Structures 2012 - Connections VIISteel Construction1/20131Editorial

Abstract

No short description available.

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Carter, Charles J.; Duncan, Cynthia J.Recent changes in U.S. connection design practiceSteel Construction1/20132-4Articles

Abstract

The 2010 AISC Specification for Structural Steel Buildings (AISC 360-10) forms the basis for the 14th edition of the AISC Steel Construction Manual. Both publications reflect changes in connection design requirements and practices. This paper summarizes the most relevant changes in connection design requirements and practices made in these latest versions of these documents.

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McFadden, Matthew R.; Packer, Jeffrey A.Weld design and fabrication for RHS connectionsSteel Construction1/20135-10Articles

Abstract

The 2010 AISC Specification for Structural Steel Buildings has expanded its scope in chapter K “Design of HSS and Box Member Connections” to include a section K4 “Welds of Plates and Branches to Rectangular HSS”. This paper discusses the historical development of the effective weld properties and analyses the structural reliability of the provisions. Additionally, there is a discussion on recent changes in U.S. and Canadian specifications/ codes with regard to the limit states for fillet weld design and the acceptance/rejection of the (1.00 + 0.50 sin1.5) term. Finally, there is a discussion of the details of an experimental research programme being performed at the University of Toronto in collaboration with AISC to determine the weld effective length in RHS T-connections under branch in-plane bending moments. In conclusion, it is found that the inclusion of the (1.00 + 0.50 sin1.5) term for RHS gapped K-connections as well as T- and X-connections, based on the limit state of shear failure along the effective throat of the weld, may be unsafe for fillet weld design when used in conjunction with the current effective weld length rules.

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Latour, Massimo; Piluso, Vincenzo; Rizzano, GianvittorioExperimental behaviour of friction T-stub beam-to-column joints under cyclic loadsSteel Construction1/201311-18Articles

Abstract

Eurocode 8 has introduced the possibility of adopting partial-strength joints for seismic-resistant MR frames, provided it is demonstrated that connections perform adequately under cyclic loads. A programme of experiments devoted to investigating the cyclic behaviour of traditional joint details has recently been carried out by the authors. Within this programme, the analysis of the results obtained has revealed that even though connections designed to dissipate the seismic energy in bolted components can provide significant advantages because they are easy to repair after a destructive seismic event, they possess reduced dissipation capacity when compared with RBS connections and traditional full-strength joints. An advanced approach aimed at enhancing the hysteretic behaviour of double split tee (DST) joints and the ambitious goal of preventing joint damage is presented here. The system proposed is based on the idea of using friction dampers within the components of beam-to-column joints. A preliminary set of prototypes has been tested experimentally and the performances of joints under cyclic loading conditions have been compared with those of traditional joint details. The experimental work was carried out at the Materials

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Cywinski, Z.Professor Jerzy Ziólko - Doctor Honoris CausaSteel Construction1/201318People

Abstract

No short description available.

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Henriques, José; da Silva, Luís Simões; Valente, IsabelDesign model for composite beam-to-reinforced concrete wall jointsSteel Construction1/201319-26Articles

Abstract

A design model for composite beam-to-reinforced concrete wall joints is presented and discussed in this paper. The model proposed is the component method extended to this type of joint. The characterization of the active components is therefore performed in terms of force-deformation curves. In this type of joint, special attention is paid to the steel-concrete connection where “new” components, not covered in EN 1993-1-8, are activated. The application of the model allows the designer to obtain the joint properties in terms of the moment-rotation curve. The accuracy of the proposed model is verified by comparing it with available experimental and numerical results. The latter were developed in the FE program ABAQUS and previously validated by experimental results.

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Dinu, Florea; Dubina, Dan; Neagu, Calin; Vulcu, Cristian; Both, Ioan; Herban, Sorin; Marcu, DragosExperimental and numerical evaluation of an RBS coupling beam for moment-resisting steel frames in seismic areasSteel Construction1/201327-33Articles

Abstract

No short description available.

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