P 41 - Effects of production-related influencing variables on the deformation and fracture behaviour of structural steels during processing and application

P 35 - Fire behaviour of steel columns in combination with concrete and of solid steel columns without concrete Composite steel columns are a comparatively new load-bearing element in building construction and civil engineering that combines the advantages of steel construction and reinforced concrete construction. Their (cold) design is regulated by the soon to be published DIN 18 806, Part 1. It makes sense to use the load-bearing reserves of unprotected composite columns in the event of fire when assessing their fire behaviour. Until now, there has been little information on this, so that it has not yet been possible to design composite columns specifically for fire protection by means of standards or guidelines. For example, it was also not possible to include composite columns in DIN 4102, Part 4, Edition 3/1981, with a corresponding classification. A supplementary research project to clarify these questions was commissioned by the Studiengesellschaft für Anwendungstechnik von Eisen und Stahl at the Institut für Baustoffe, Massivbau und Brandschutz, TU Braunschweig. The experimental and comparative mathematical investigations in this research project will provide a basis for assessing the fire behaviour of composite columns. This is reported on and the first possibilities for calculating load-bearing capacities in the event of fire are given. The following column types were analysed: - Hollow sections embedded in concrete - Fully cast-in I-rolled profiles - Concreted cold-formed C-profiles - Solid profile columns (without bond; the main aim here was to analyse the influence of "mass"). After completion of further theoretical and computational investigations currently being carried out at the University of Braunschweig, it will be possible to calculate the load-bearing capacity as a function of the required fire resistance period within defined parameter limits. STUDIENGESELLSCHAFT FÜR ANWENDUNGSTECHNIK VON EISEN UND STAHL e.V. Publication: 1983 Authors: Prof. Dr.-Ing. De.-Ing. E. H. K. Kordina, Prof. Dr.-Ing. W. Klingsch

P 24.1 - Fastening systems - Structural anchors Developments in the construction industry show that conventional construction methods are increasingly being replaced by pure assembly construction systems. They are characterised by an extensive transfer of parts production to the workshop or factory with constant conditions and excellent possibilities for simplification. Assembly then remains on the construction site with the main activities of transporting and joining. While transport on the construction site has been revolutionised in recent years, there is still a great deal of work to be done in the field of fastening technology. This means that fasteners and fastening systems are becoming increasingly important in order to further reduce the proportion of assembly in total production costs, which can account for up to 4o %. As there is little specialised literature available on fasteners and fastening techniques for the construction industry and there is a complete lack of comprehensive publications, a compilation of this topic seemed sensible and necessary. A few years ago, the Studiengesellschaft für Anwendungstechnik von Eisen und Stahl e.V. therefore initiated a project with the author of this publication, Prof.Arch.Dipl.-Ing. Henschker, to summarise and present the state of the art of fasteners at the present time, limited to the requirements of building construction. The actual work consisted of compiling, reviewing and analysing the relevant literature, in particular taking into account company publications. Furthermore, discussions were held with manufacturers of fasteners, planners and designers; and finally, the aim was to complete all the necessary information for the planner and installer, with the aim of increasing the clarity of the fasteners currently on the market through descriptive texts, figures, tables, load-bearing capacity analyses, etc. This publication is the first to provide an overview of the field of "structural anchors". Further publications on other fasteners and fastening techniques are in the pipeline. This far exceeds the scope that we originally set ourselves with our suggestion, and other organisations have thankfully taken on the further promotion of the work. The Studiengesellschaft für Anwendungstechnik von Eisen und Stahl e.V. will continue to publish subsequent volumes on this subject at irregular intervals. Publication: 1981 Authors: Prof. Arch. Dipl.-Ing. R. Henschker, Dipl.-Ing. U. Heuser

P 08.1 - Load-bearing behaviour of steel columns in combination with concrete (hollow sections) This paper contains the calculation and design of concrete-lined hollow section columns made of structural steel under compression and uniaxial bending. After a brief introduction, Section 2 summarises international research work in this field. In Section 3, a calculation programme is developed as an accurate numerical method. Section 4 contains interaction relations for the ultimate limit state for the whole range between centric compression and pure bending. Many results obtained with the described calculation programme and the interaction curves are compared with each other and with available test results; very good agreement can almost always be observed. Publication: 1975 Authors: Prof. Dr.-Ing. Roik, R. Bergmann, H. Bode, G. Wagenknecht

P 08.2 - Load-bearing behaviour of steel columns in combination with concrete (open profiles) This paper contains the calculation and design of steel columns in concrete under compression and uniaxial bending. Some comments and design suggestions are also made for biaxial bending. Section 2 summarises international research work. Section 3 explains a calculation programme that is used for precise numerical calculation. Section 4 contains interaction relations and design proposals based on the European buckling stress curves. The proposed design procedure is explained using a number of examples. Numerous ultimate loads determined in accordance with Sections 3 and 4 are compared with foreign test results. A generally good agreement can be established Publication: 1976 Authors: J. Stanke