TY - GEN A1 - Pasternak, H. A1 - Komann, Steffen ED - Gizejowski, ED - Kozlowski, ED - Sleczka, ED - Ziólko, T1 - A new design formula for determining the load-bearing capacity of locally supported shells T2 - XI. Miedzynarodowa Konferencja Naukowo-Techniczna "Konstrukcje Metalowe" CY - Rzeszów, Poland DA - 2006-06-21 KW - Cylindrical shell KW - Stability KW - Steel KW - Buckling KW - Longitudinal stiffeners PY - 2006 SN - 0-415-40120-8 SP - 160 EP - 161 PB - Taylor & Francis CY - London, UK AN - OPUS4-19152 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Pasternak, H. A1 - Komann, Steffen ED - Camotin, D. T1 - A new approach for determining the load-bearing capacity of locally supported shells N2 - In practice usually thin-walled cylindrical silos are supported locally at the bottom rim of the shell. In this area a stress concentration may occur, which is responisble for buckling of the shell. In the currently applied codes, there is no information, how to analyze the load-bearing capacity of theselocally supported shells. In this paper, a new design formula is given for determining the load-bearing capacity. T2 - International Colloquium on Stability and Ductility of Steel Structures CY - Lisbon, Portugal DA - 2006-09-06 KW - Cylindrical shells KW - Stability KW - Steel KW - Buckling KW - Longiudinal stiffeners PY - 2006 SN - 972-846961-6 VL - 2 SP - 595 EP - 602 PB - IST Press CY - Lisabon AN - OPUS4-19153 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Launert, B. A1 - Szczerba, R. A1 - Gajewski, M. A1 - Rhode, Michael A1 - Pasternak, H. A1 - Gizejowski, M. T1 - The buckling resistance of welded plate girders taking into account the influence of post-welding imperfections - Part 1: Parameter study N2 - Welding is the most important joining technique and offers the advantage of customizable plate thicknesses. On the other hand, welding causes residual stresses and deformations influencing the load carrying capacity. Their consideration in the design requires simple and fast models. Though welding simulation has contributed to accurately access to these values nowadays, their application to large components remains still in a less practicable range. Nevertheless, many studies emphasized the need to make corrections in recently available simplified models. Especially the influence of residual stresses seems somewhat overestimated in many cases if comparing conventional structural steel S355 and high-strength steel S690. In the age of computer-aided design, an improved procedure to implement weld-inducted imperfections appears overdue. This will be presented in two parts. The first part illustrates the potential influence of post-welding imperfections exemplified for weak axis buckling in comparison with the general method in accordance with Eurocode 3. Residual stresses and initial crookedness were varied systematically in order to produce a scatter band of capacities. An approach to characterize the borders of these imperfections was untertaken before that. The excessive scattering of reduction factors for the load bearing capacity demonstrates the importance of these variables. Results were finally evaluated against advanced simulation models which will be further detailed in part two of this contribution. KW - Welded Plate Girders KW - Stability KW - Post-welding Imperfections KW - Residual Stresses KW - Parameter Study PY - 2017 DO - https://doi.org/10.3139/120.110964 SN - 0025-5300 SN - 2195-8572 VL - 59 IS - 1 SP - 47 EP - 56 PB - Carl Hanser Verlag CY - München AN - OPUS4-38922 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -