Behaviour of parallel girders stabilised with u-frames

Lateral torsional buckling is a key factor in the design of steel girders. Stability can be enhanced by cross‐bracing, reducing the effective length and thus increasing the ultimate capacity. U‐frames are an option often used to brace the girders, when designing through type of bridges and where overhead bracing is not practical. This paper investigates the effect of the U‐frame spacing on the stability of the parallel girders. Eigenvalue buckling analysis was undertaken with four different spacings of the U‐frames. Results were extracted from finite element analysis, interpreted and conclusions drawn

CMM-2013 -Computer Methods in Mechanics

Abstract In Eurocode 3: Design of steel structures -Part 1-2: General rules -Structural fire design, the temperatures in the steel section are assumed uniform and the thermal properties are assumed constant. This leads to conservative and possibly uneconomic designs. In particular, steel sections embedded in or in direct contact with concrete are not considered appropriately -only the reduction of the exposed area is taken into account. In addition, the shadow effect is rarely considered in structures with both concrete and asteel elements such as composite floors. It has been mainly used for stand-alone columns with I-cross section. In this paper, the temperature distributions in a steel beam with or without considering the shadow effect are calculated using the program TASEF. The resulting temperatures are then used to determine the fire duration under loading using a finite difference based computer program COMPSEF for the mechanical response. The differences in failure times reflect the savings that can be made using such 'advanced calculation models' permitted in Eurocode 3, when compared with the prescriptive methods included in the code

Inelastic column behaviour-- its application to composite columns in biaxial bending and stiffened plates in compression

Imperial Users onl

Proceedings of the METNET Seminar 2015 in Budapest : METNET Annual Seminar in Budapest, Hungary, on 13 – 14 October 2015

Notice of retraction, November 27, 2017 HAMK wants to notify readers of a retraction of the article Stabilization of Steel Structures by Sandwich Panels by Olli Ilveskoski, published in Proceedings of the METNET Seminar 2015 in Budapest. This article has been investigated according to the guidelines of The Finnish Advisory Board on Research Integrity, with the conclusion that the article includes plagiarism. This is unacceptable, and we therefore retract this article from the literature, watermark the electronic version and advice against the use of this material. ----------------------------------------------------------------------------------------------- The METNET network aims to enhance the development potential and the research and innovation capacities of regional innovation systems and wider communities of Europe. METNET provides an international innovation environment for its members and the possibility to expand their regional innovation networks internationally. METNET seminars and workshops deal with technical aspects of metal construction as well as issues of concern to industry on management, planning and sustainability of projects. This book covers papers presented and submitted for the tenth annual METNET seminar in October 2015 held at Budapest University of Technology and Economics BME. The seminar continued the METNET tradition of presenting scientific and development papers of high calibre

Proceedings of the METNET Seminar 2011 in Aarhus : held at Aarhus University on 12 – 13 October 2011

Notice of retraction, November 27, 2017 HAMK wants to notify readers of a retraction of the article Sustainability - need for a new approach in the architecture by Olli Ilveskoski, published in Proceedings of the METNET Seminar 2011 in Aarhus. This article has been investigated according to the guidelines of The Finnish Advisory Board on Research Integrity, with the conclusion that the article includes plagiarism. This is unacceptable, and we therefore retract this article from the literature, watermark the electronic version and advice against the use of this material. ------------------------------------------------------------------------------------------------ Thin-walled cold-formed steel performance is influenced by the presence of imperfections, which could be of geometric or mechanical type, the local or sectional instability, the global instability and the interaction of these two instability modes. In the case of perforated section, these factors are supplemented by the presence of perforations, which in some way, can be regarded also as imperfections. Due to the wide variety in the size and configuration of perforations, it is impossible to provide a unified practical design procedure to calculate the ultimate strength of perforated sections. Generally, the design codes do not contain specific analytical methods for these sections, but for a design assisted by testing. This is the case of European Norm, EN1993-1-3 and Australian and New Zeeland standard AS/NZS4600:2005. In contrast, the North American Specification (AISI:2004) provides specific recommendations for perforated sections, but they have got some limitations regarding the size and shape of perforations and the distance between them (e.g. hole diameter and pitch). In the case of storage racking there are specific design rules and standards, such as Recommendations of the Federation Europeenne de la Manutention (FEM 10.2.02, replaced in 2009 by the EN15512:2009 standard), Australian Standard (AS4048:1993) and Specification for the Design, Testing and Utilisation of Industrial Steel Storage Racks by the Rack Manufacturers Institute (MH16.1:2008). All these codes, recommend experimental tests to evaluate the ultimate strength of rack members. However, testing is costly and time consuming, and, if available, simplified design approaches would be preferred. Nowadays, numerical procedures like Finite Element Methods, Finite Strip Method or Generalised Beam Theory have been successfully used to predict behaviour of perforated sections. However, the numerical models need to be calibrated by relevant tests. The present paper proposes, after discussing the interactive buckling phenomena, a calculation procedure to design perforated sections. This approach applies the ECBL method to clibate a specific imperfection factor for the European buckling curves

Proceedings of the METNET Seminar 2013 in Luleå : Metnet Annual Seminar in Luleå, Sweden, on 22 – 23 October 2013

Notice of retraction, November 27, 2017 HAMK wants to notify readers of a retraction of the article Structural bracing – forces and stiffness by Olli Ilveskoski, published in Proceedings of the METNET Seminar 2013 in Luleå. This article has been investigated according to the guidelines of The Finnish Advisory Board on Research Integrity, with the conclusion that the article includes plagiarism. This is unacceptable, and we therefore retract this article from the literature, watermark the electronic version and advice against the use of this material. ------------------------------------------------------------------------------------------------- This book covers the papers presented in the annual Metnet Seminar in October 2013 held at Luleå University of Technology. The seminar continued the METNET tradition of presenting scientific and development papers of high calibre. METNET seminars deal with technical aspects of metal construction as well as issues of concern to industry on management, planning and sustainability of projects. Metnet cooperation promotes regional innovation environments and strengthens knowledge structures, especially in the European regions represented by its members. At the annual seminars, the participating partner organization represents its regional innovation environment but simultaneously is a partner of a larger and stronger international innovation world created by active cooperation between the institutes and enterprises

Proceedings of the METNET Seminar 2012 in Izmir : Metnet Annual Seminar in Izmir, Turkey, on 10 – 11 October 2012

METNET A European network of institutions engaged in research and development in metal structures. Aims The general aim of the METNET network is to exchange information on current know-how in the field of metal structures among European research and development organizations. The network encourage the development of new products, facilitates better utilisation of services and business of companies involved with metal structures, supports innovation processes in companies involved in the manufacture and design of metal structures and promotes best practice and knowledge transfer between companies and research organizations in Europe. Members The member organisations include universities and research establishments in Finland, Estonia, Sweden, Denmark, Germany, Czech Republic, Hungary, Poland, Russia, Ukraine, UK, Belarus, Portugal, Turkey, Greece. The current Chairman of METNET is Dr Sc Lauri Tenhunen. Publications For the second time, at its Annual Seminar 2012, which was held in Izmir, Turkey, a scientific section has been included. The Scientific Papers and Technical Reports presented over the two days are included in this publication which is available both in book form and as an e-book. This publication is the first in the series to come. The papers have been refereed by a peer group

Proceedings of the METNET Seminar 2016 in Castellon : METNET Annual Seminar in Castellon, Spain, on 11 – 12 October 2016

The METNET network aims to enhance the development potential and the research and innovation capacities of regional innovation systems and wider communities of Europe. METNET provides an international innovation environment for its members and the possibility to expand their regional innovation networks internationally. METNET seminars and workshops deal with technical aspects of metal construction as well as issues of concern to industry on management, planning and sustainability of projects. This book covers papers presented and submitted for the tenth annual METNET seminar in October 2016 held at Universitat Jaume I (UJI), Castellon, Spain. The seminar continued the METNET tradition of presenting scientific and development papers of high calibre

Proceedings of the METNET Seminar 2014 in Moscow : METNET Annual Seminar in Moscow, Russia, on 21 – 22 October 2014

This book covers the papers presented and submitted for the annual Metnet Seminar in October 2014 held at Moscow State University of Civil Engineering MGSU. The seminar continued the METNET tradition of presenting scientific and development papers of high caliber. METNET seminars deal with technical aspects of metal construction as well as issues of concern to industry on management, planning and sustainability of projects. Metnet cooperation promotes regional innovation environments and strengthens knowledge structures, especially in the European regions represented by its members. At the annual seminars, the participating partner organization represents its regional innovation environment but simultaneously is a partner of a larger and stronger international innovation world created by active cooperation between the institutes and enterprises

Utility of routine post-admission testing for SARS-CoV-2 in a rehabilitation facility

Asymptomatic screening for SARS-CoV-2 is recommended in healthcare settings during periods of increased incidence, yet studies in rehabilitation settings are lacking. Routine weekly post-admission asymptomatic testing in a rehabilitation facility offered marginal gain beyond syndromic and targeted unit testing and was not associated with a reduced risk of healthcare-associated COVID-19