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21. DASt-Forschungskolloquium
Schweißen in der maritimen Technik und im Ingenieurbau
37. Stahlbauseminar in Rheine

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The Kazakh pavilion was the heart of the EXPO 2017 in Astana. The ball-shaped construction of steel and glass with a diameter of 80 m had to be designed in a very short time and erected at temperatures as low as -40°C. In the upper part, there are two wind turbines, which contribute to the sustainable energy supply of the pavilion. (Copyright: Andreas Keller, Altdorf, see p. 125)

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Yohanes Ingkiriwang and Harry Far: Numerical investigation of the design of single-span steel portal frames using the effective length and direct analysis methods
Hussein Haydar, Harry Far and Ali Saleh: Portal steel trusses vs. portal steel frames for long-span industrial buildings
Matthias Rohde: Loads and strength in amusement rides
Pierre-Olivier Martin, Tien Minh Nguyen and Laurence Davaine: Effect of the torsional stiffness of closed section stiffeners on plate buckling in Eurocode 3 Part 1-5
Maciej Chrzanowski, Christoph Odenbreit, Renata Obiala, Teodora Bogda, Hervé Degée: Shear stresses analysis at the steel-concrete interface. Experimental tests and FE numerical model.
Emidio Piermarini, Hayden Nuttall, Rob May, Victoria M. Janssens, Wolf Manglesdorf and Tim Kelly: Morpheus Hotel, Macau: A paradigm shift in computational engineering

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Dedicated to our speaker, Prof. Werner Sobek, in honour of his 65th birthday
In 2017, the University of Stuttgart started a Collaborative Research Centre with the title Adaptive Skins and Structures for the Built Environment of Tomorrow. The goal of this research project is to find an answer to today's most urgent social and ecological questions as the global population continuously increases and the available resources remain limited. As the central approach to the solution of this problem, adaptive elements will be included in the structure, the interior and the façade of an experimental 37 m tall building. This paper introduces the topic of adaptivity in building structures and provides an overview of the research topics applied in this globally unique adaptive high-rise building. Due to the complexity of research topics of this Collaborative Research Centre, this paper only covers the research concerning the experimental high-rise building.

Dedicated to Prof. Werner Sobek on the occasion of his 65th birthday
In 1864, James Clerk Maxwell wrote the remarkable paper “On Reciprocal Figures and Diagrams of Forces.” Maxwell observed that for a frame (what today would be called a truss or a net) to be in equilibrium, it must be the projection of a plane-faced polyhedron. It is now known that this observation is correct, provided the bars of the truss or net and the lines of the external applied forces can be represented by a planar graph. We also know that the plane-faced polyhedron is the Airy stress function.
This information can greatly assist a structural designer in creating, adjusting, and analysing structural nets. These nets can be planar structures or the planar projections of three dimensional nets (including spider webs). Simple visual techniques can be used to evaluate how many independent states of self-stress exist and how to adjust the design to achieve goals such as targeted geometries, redundancies or forces. Combined with force-density form finding, this process creates a powerful design tool. This paper will review the theoretical background and applications of the design process.

Dedicated to Prof. Werner Sobek on the occasion of his 65th birthday
On 16 May 2018, Prof. Werner Sobek turned 65. A few months earlier, the group of companies he founded, with more than 300 employees worldwide, celebrated its 25th anniversary. We would like to use Werner Sobek's birthday as an opportunity to reflect on some of the steel structures inspired by him. Out of the many projects that would have been eligible, the authors have focused on those that seem of primary importance or have not been written about yet.

Dedicated to Prof. Werner Sobek on the occasion of his 65th birthday

Dedicated to Prof. Dr.-Ing. Dr.-Ing. E.h. Dr. h.c. Werner Sobek on his 65th birthday.

Dedicated to Prof. Dr.-Ing. Dr.-Ing. E.h. Dr. h.c. Werner Sobek on the occasion of his 65th birthday

This paper deals with revised, simplified, consistent equations for plate-to-Circular Hollow Section (CHS) joints for inclusion in codes. After a short review of the background to these resistance equations in the current consolidated version of EN 1993-1-8 and those in ISO 14346, the background to these simplified new equations is discussed. The equations for Plate-to-Circular Hollow Section T and X joints (called TP and XP joints respectively) in the current EN 1993-1-8 are based on experimental data available up to 1991. They are further related to the equations for CHS T and X joints. Most of the data used are based on the ultimate joint resistance. A similar approach is used for the TP and XP equations in ISO 14346, but these are related to the updated equations for CHS T and X joints.
Since the drafting of ISO 14346, new consistent numerical data from Voth became available where the resistance is not only based on the ultimate resistance but also takes the 3 %d0 joint deformation limit into account.
The new equations in prEN 1993-1-8 are based on the Voth data, the de Winkel data and the Voth-Packer equations, but use a simplified uniform presentation which permits one to relate joints with an I, H and RHS brace-to-CHS chord to these basic equations. Furthermore, the presented equations are based on the case of axial compression load in the plate, which is the lower bound of the compression and tension load cases.

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Werner Sobek: from Ultralightweight Design to Triple Zero
Professor Akimitsu Kurita passed away

New chief editor of the journals “Stahlbau” and “Steel Construction” of publishing house Ernst & Sohn

ECCS news
Practical training sessions on cold-formed steel structures
Intergalva 2018 - 25th International Galvanizing Conference
9th International Symposium on Steel Bridges - 5th European Steel Bridge Awards
Launch of the 2018 competition for the 5th European Steel Bridge Awards
PROGRESS - Provisions for Greater Reuse of Steel Structures
Steelday | Swiss Construction Industry 4.0

Announcements Prof. Luís Simões da Silva, Doctor Honoris Causa of the University of Liège

Technical Committees (TC) activities TC7 - Thin Gauge Structures
TC14 - Sustainability

TC news Fire Design of Steel Structures: Nomination

R&D Activities Project Brief Overview
Circular Economy of the Steel Construction Products
Afterlife of Metal Products in the Construction Sector

Further ECCS news Fatigue Design of Steel and Composite Structures - 2nd Edition
Membership Benefits for Company Members

International Conference on Steel and Concrete Structures
Built Heritage Management and Presentation
Congress on Numerical Methods in Engineering

Ausbau Grand Paris Express, Paris.
Bis 2030 will die französische Hauptstadt ihr berühmtes U-Bahn-Netz um 200 Kilometer erweitern, vor allem unterirdisch. “Grand Paris Express” lautet der Name dieses gigantischen und größten Infrastrukturprojekts in Europa, bei dem aktuell schon sechs Bauer-Schlitzwandfräsen im Einsatz sind - weitere sollen in diesem Jahr folgen.
(Foto: © BAUER Gruppe)

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Komplette Monatsausgabe

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BVMB: Weg mit dem Vorschriften-Dschungel!
Massiver Gegenwind gegen “Staugebühr”
“Bauunternehmen tragen keine Schuld!”