Papers by Ulrike Kuhlmann
Steel Construction, May 1, 2015
ABSTRACT The steady growth in world trade leads to a demand for more port and harbour facilities.... more ABSTRACT The steady growth in world trade leads to a demand for more port and harbour facilities. One of the most common forms of construction for deep-water harbour quays is the combined steel pile wall. It consists of up to 45 m long H-section king piles plus Z-section intermediate sheet pile infill elements. The intermediate elements and the quay both transfer all forces to the king piles, which as a result are loaded with (bi)axial bending and axial force, so their stability must be checked. Up to now the effect of the soil surrounding the piles was used just in terms of best practice – buckling about the weak axis and lateral torsional buckling were neglected completely. Considering these stability phenomena in design without taking the soil into account would lead to a very conservative approach. As verification of lateral torsional buckling according to EN 1993-1-1 (EC3-1-1) becomes relevant when the embedment is neglected, a more refined analysis has been developed.This article presents simplified criteria that quickly exclude stability phenomena (flexural buckling about the weak axis and lateral torsional buckling) while taking into account the effects of the soil. For the cases in which the criteria are not fulfilled, the article presents economic solutions that consider the embedment of the king piles in the soil in the design for stability.
Steel Construction, Nov 1, 2022
DOI to the publisher's website. • The final author version and the galley proof are versions of t... more DOI to the publisher's website. • The final author version and the galley proof are versions of the publication after peer review. • The final published version features the final layout of the paper including the volume, issue and page numbers. Link to publication General rights Copyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights. • Users may download and print one copy of any publication from the public portal for the purpose of private study or research. • You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal. If the publication is distributed under the terms of Article 25fa of the Dutch Copyright Act, indicated by the "Taverne" license above, please follow below link for the End User Agreement:
Steel Construction, Feb 1, 2012
The corrugated steel plate has been used in many applications for a long time because of its favo... more The corrugated steel plate has been used in many applications for a long time because of its favourable properties. Engineers have realized a potential application in bridge structures, too, especially hybrid bridges. Among modern bridge erection methods, incremental launching is one of the most competitive. When incremental launching is used to erect a bridge, the girder is subjected to a combined action of transverse force (F), shear force (V) and bending moment (M), resulting in a complex stress field and a combined loading situation. The current version of EN 1993-1-5, Annex D, includes design methods for the bending and shear resistance of corrugated web girders, but no recommendations for the patch loading resistance calculation or consideration of different interactions (F+V; F+M). Therefore, this paper focuses on the experimental and numerical investigations into the structural behaviour of corrugated web girders under all the aforementioned actions. Design proposals are developed to determine the patch loading resistance of corrugated web girders and two interaction equations are proposed to take into consideration the reduction in resistance due to the combined loading situation.
Steel Construction, May 1, 2015
ABSTRACT This paper presents the design method for slim-floor construction that comprises a steel... more ABSTRACT This paper presents the design method for slim-floor construction that comprises a steel beam and a concrete or composite floor slab in which the beam is integrated within the depth of the slab. The slabs are either supported on a plate attached to the bottom flange or the bottom flange of the beam itself. The main design parameters and load transfer mechanisms are discussed. Plastic analysis has been adopted for the design of the bending capacity at the ultimate load condition and the design procedures described are in accordance with the principles given in Eurocode 4. Attention is paid to the type of shear connection between steel and concrete.
CRC Press eBooks, Oct 21, 2014
This paper summarises a research project that analysed aspects of stability failure of thin-walle... more This paper summarises a research project that analysed aspects of stability failure of thin-walled compression members that are likely to exhibit combined global and local buckling. In particular the influence of various imperfections on the load-carrying capacity, namely welding residual stresses and local as well as global geometrical defects was subject of detailed experimental and numerical investigations. The insight into the structural behaviour has led in the case of thin-walled box sections to a proposal for a modification of the non-dimensional slenderness value used in the buckling verification and to the recommendation of a shift of the applied European buckling curve to a more favourable one.Peer reviewe
Steel Construction, Jun 29, 2020
DOI to the publisher's website. • The final author version and the galley proof are versions of t... more DOI to the publisher's website. • The final author version and the galley proof are versions of the publication after peer review. • The final published version features the final layout of the paper including the volume, issue and page numbers. Link to publication General rights Copyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights. • Users may download and print one copy of any publication from the public portal for the purpose of private study or research. • You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal. If the publication is distributed under the terms of Article 25fa of the Dutch Copyright Act, indicated by the "Taverne" license above, please follow below link for the End User Agreement:
ABSTRACT Thin walled columns are subject to stability failure on local (plate buckling) and globa... more ABSTRACT Thin walled columns are subject to stability failure on local (plate buckling) and global (column buckling) level. Both buckling phenomena interact. A proposal for the use of EBC for the determination of the carrying capacity of welded steel box sections is given and compared to an extensive numerical simulation study.
Stahlbau, Nov 1, 2009
Dieser Beitrag stellt die Ergebnisse einer Kurzstudie [17] vor, in der das Stabilitätsverhalten d... more Dieser Beitrag stellt die Ergebnisse einer Kurzstudie [17] vor, in der das Stabilitätsverhalten der Tragpfähle von kombinierten Stahlspundwänden untersucht wurde. Zunächst werden die neu entwickelten Bemessungsregeln für Stabstabilität nach Eurocode 3 vorgestellt. Erste Beispielberechnungen zeigen, dass mit dessen Anwendung nicht nur der Berechnungsaufwand ansteigt, sondern auch das Bemessungsniveau konservativer wird. Wird die Stützwirkung des Bodens in Form einer Federhalterung angesetzt, ist ein großer Anstieg der rechnerischen Tragfähigkeit zu verzeichnen. Für die Spezifizierung der Federsteifigkeit des Baugrunds wurden beispielhaft Momenten‐Verdrehungsbeziehungen ermittelt. Die erforderlichen Drehfedersteifigkeiten, die notwendig sind, um das alte Bemessungsniveau zu erreichen, können von den Werten für die vorhandene Steifigkeit überschritten werden. Es konnte gezeigt werden, dass die Entwicklung eines Verfahrens für die effiziente Stabilitätsbemessung der Tragpfähle von Stahlspundwänden sowohl notwendig als auch möglich ist.
Periodica Polytechnica-civil Engineering, 2010
Komponente Ankerbolzen auf Schub Durchstanzen der Ankerplatte Ankerplatte auf Zug Stützen-und Trä... more Komponente Ankerbolzen auf Schub Durchstanzen der Ankerplatte Ankerplatte auf Zug Stützen-und Trägerflansch auf Druck Stützenfußplatte auf Druck Abbildung Kapitel Kapitel 4.7 Kapitel 4.3 Kapitel 4.4 Kapitel 4.5 Kapitel 4.6
Steel Construction, 2018
Bridges are of vital importance for the European infrastructure network. Due to their significanc... more Bridges are of vital importance for the European infrastructure network. Due to their significance in the political economy, the requirement for sustainable, meaning highly advanced, cost‐effective, environmentally friendly and long‐lived structures is outstanding. Therefore steel composite road bridges were analysed in the Sustainable Steel‐Composite Bridges in Built Environment RFCS project (SBRI) by means of a holistic approach combining Lifecycle Assessment, Lifecycle Costs and Lifecycle Performance analyses to promote steel in the bridge construction. The partners of the project were the Institute of Structural Design Universität Stuttgart, Universidade Coimbra, Institut français des sciences et technologies des transports, de l'aménagement et des réseaux, BRISA Engenharia e Gestão SA and ArcelorMittal.The paper presents a holistic approach to steel and concrete composite bridges by combining analyses of their environmental, economic and functional qualities. The idea of su...
Composite Construction in Steel and Concrete VII, 2016
• A submitted manuscript is the author's version of the article upon submission and before pe... more • A submitted manuscript is the author's version of the article upon submission and before peer-review. There can be important differences between the submitted version and the official published version of record. People interested in the research are advised to contact the author for the final version of the publication, or visit the DOI to the publisher's website. • The final author version and the galley proof are versions of the publication after peer review. • The final published version features the final layout of the paper including the volume, issue and page numbers.
Structural robustness and mitigation of progressive collapse is a specific safety consideration w... more Structural robustness and mitigation of progressive collapse is a specific safety consideration which is now addressed in modern codes and standards, including the Eurocodes, and which requires particular care from all professionals involved in the construction industry, including architects, designers, constructors, control officers, and insurance managers. The importance of the robustness design has been recognised by world shacking disasters such as the 9/11 collapse of Twin Towers in New York City and the need for practical guidelines has been triggered. Indeed, the availability of such guidelines for practical application addressed to various construction professionals considering different use and risk of buildings helps to ensure confidence in safety of steel and composite construction. During the past decade, a significant number of research projects related to the structural response of steel and composite buildings under various exceptional loading situations (impact, fire, earthquake,…) have been carried out, especially in Europe and in the USA. As an outcome of these recent scientific actions, different possible practical methods have been proposed to achieve the mitigation of progressive collapse through effective designs and accounting for the full potential of material characteristics in steel and composite structures. Purpose of the project “Mitigation of the risk of progressive collapse in steel and composite building frames”- FAILNOMORE, is to consolidate the knowledge developed in the aforementioned research and transform it into practical recommendations and guidelines. The set of practical and user-friendly design guidelines for mitigating the risk of progressive collapse is focused on steel and composite structures subjected to exceptional events such as impact, explosions, fire, seismic, referring also to available normative documents, in order to propose a commonly agreed European design methodology. The project was funded for 24 months (starting from July 2020) by the Research Fund for Coal and Steel (RFCS) under grant agreement No 899371.The present design manual is a part of dissemination material and reflects the main outcomes of the FAILNOMORE project. The present document is divided into three parts: • Part 1 entitled “Design for robustness” which reflects the design strategies and the design approaches to be adopted. In particular, the normative context is first presented in Section 1.Then, in Section 2, the design methodology to be followed and the design strategies which can be adopted are briefly introduced. Finally, detailed and practice-oriented design guidelines on how to apply the different proposed design approaches are provided from Section 3 to 6 with general conclusions drawn in Section 7. • Part 2 entitled “Worked examples” which illustrates how the different design approaches can be applied on four actual design examples: a steel and a composite structure designed in a non-seismic area and a steel and a composite structure designed in a seismic area. • Part 3 entitled “Annexes” which provides the reader with additional detailed information regarding some of the proposed design concepts. • Part 4 entitled “References” which collects the references mentioned in the present document
Steel Construction, Aug 1, 2011
Aiming at the study of steel-to-concrete joints, the RFCS project entitled "New market chances fo... more Aiming at the study of steel-to-concrete joints, the RFCS project entitled "New market chances for steel structures by innovative fastening solutions" ("InFaSo" [1]) was launched. Within the experimental programme of the project, composite beam to reinforced concrete wall joints were tested. In the present paper, the results of these tests are presented. Subsequently, to determine joint properties a spring mechanical model has been developed and validated against the experimental results. The studied joint configuration is illustrated in Fig. 1. Two different transfer areas may be distinguished. The upper area consists of a reinforced concrete slab where the longitudinal reinforcement is anchored in the reinforced concrete wall. The wall and the slab were concreted at different times and therefore, no shear is assumed to be transferred between these members. Any friction is neglected. Thus, only tension is transferred through this part of the joint. At the bottom area, the steel beam sits in a steel bracket welded to an anchor plate which is fastened the reinforced concrete wall. The fixation between anchor plate and wall is achieved by headed studs welded to the plate. On the outside of the steel bracket, a plate is welded creating a "nose" which avoids the slip of the beam out of the steel bracket. The end-plate of the steel beam is used for this propose. This end-plate transmits the shear load to the steel bracket. Finally, compression is transferred to the reinforced concrete wall using a contact plate between endplate and anchor plate. The flux of loads is schematically represented in Fig. 2 for a hogging bending moment.
Report, 2022
In steel and composite bridges, a practice-oriented and fatigue-suitable design is crucial for su... more In steel and composite bridges, a practice-oriented and fatigue-suitable design is crucial for sustainable and economical infrastructures. The welded joints of slitted tubular elements, especially of circular hollow sections with gusset plates for cross girder bracings or box girder diaphragms, are critically assessed in view of their fatigue behaviour. The gusset plate welding at the end of the slit is the critical fatigue spot. For the currently various design variants used in bridge construction with basically different notches, there is no clear rule given regarding the detail category by the standards EN 1993-2 or EN 1993-1-9. This paper summarises the experimental und numerical results of a research project on three different fatigue design solutions for tubular bracings in steel and composite bridges. An overview of the practice-oriented design, the benefits for the execution and manufacturing as well as the proposals for prEN 1993-1-9 and design recommendations are given.
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Papers by Ulrike Kuhlmann