TY - JOUR A1 - Launert, B. A1 - Rhode, Michael A1 - Kromm, Arne A1 - Pasternak, H. A1 - Kannengießer, Thomas T1 - Measurement and numerical modeling of residual stresses in welded HSLA component-like I-girders JF - Welding in the World N2 - The present contribution shows the residual stress results obtained from experiments with the sectioning method in comparison to global(structural) welding simulation models on component-like (i.e., large scale) I-girders made of structural steel grades S355 and S690QL. Plates were welded by conventional gas metal arc welding using two different heat inputs. In addition, the base material was assumed to be stress-free. Based on these results, conclusions and recommendations for the design of welded I-girders are drawn. T2 - IIW - Annual Assembly 2016 CY - Melbourne, Australia DA - 10.07.2016 KW - Residual Stresses KW - Microalloyed Steels KW - Girders KW - MAG Welding KW - Numerical Simulation PY - 2016 DO - https://doi.org/10.1007/s40194-016-0413-x SN - 1878-6669 SN - 0043-2288 VL - 61 IS - 2 SP - 223 EP - 229 PB - Springer CY - Berlin, Heidelberg AN - OPUS4-38919 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 JF - Materials Testing 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 - TY - JOUR A1 - Pasternak, H. A1 - Launert, B. A1 - Kannengießer, Thomas A1 - Rhode, Michael T1 - Advanced residual stress assessment of plate girders through welding simulation JF - Procedia Engineering / Modern Building Materials, Structures and Techniques N2 - This article provides an impression on potentials in applying nowadays welding simulation tools in construction design. This is carried out exemplary on plate girders from two structural steel grades. The calculated residual stresses are compared with measurements by sectioning method. It has been repeatedly stated that present Eurocode models fail to approximate the residual stresses. Especially for high strength steel (HSS) only limited information is available on realistic occurring residual stresses in typical I-girders. The investigations are aimed to give further guidance on these values. A few proposals on advanced models are discussed. T2 - MBST 2016 - Modern Building Materials, Structures and Techniques CY - Vilnius, Litunia DA - 26.05.2016 KW - Residual stresses KW - Plate girders KW - I-shape sections KW - High-strength steel KW - Welding simulation PY - 2017 UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-392177 UR - http://www.sciencedirect.com/science/article/pii/S1877705817305192 DO - https://doi.org/10.1016/j.proeng.2017.02.013 SN - 1877-7058 IS - 172 SP - 23 EP - 30 PB - Elsevier CY - Amsterdam, Niederlande AN - OPUS4-39217 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -