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Resistance of stainless steel girders subjected to concentrated forces
1998 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

This report deals with the resistance to patch loading for stainless steel girders. The study included laboratory experiments, a finite element study performed in the FE- package ABAQUS and analytical solutions according to Eurocode 3 Part 1.5. The experimental results were also compared to results from similar tests made on girders of high strength, quenched and tempered steel. The experimental study included three I- shapes, welded girders made of austenitic stainless steel of grade 1.4301, according to EN 10 088, (AISI 304) which were subjected to a concentrated load applied at one flange, a load case often referred to as patch loading. The stainless girders had a more flexible response to the applied load up to ultimate load than the girders made of structural steel, but the behaviour after the critical load was quite similar for the two different steel qualities. In the Swedish NAD, National Application Document, to Eurocode 3 Part 1.4 the reference for resistance to patch loading is changed from Eurocode 3 part 1.1 to Eurocode 3 Part 1.5 and the proposed design procedure therein is based on tests made on structural steel. Yet it was shown herein that the model presented in Eurocode 3 Part 1.5 gave a fairly good prediction of the resistance to patch loading for the girders within this study and that the results were better with this design procedure than with the one presented in Eurocode 3 Part 1.1. The finite element study was concentrated on one of the tested girders. The model used in the analysis was built of shell elements: 4- and 9- node quadrilateral shell elements. In he analysis residual stresses due to welding, initial imperfections and a nonlinear material behaviour were included. The initial imperfections were given the shape of the first buckling mode, which was determined from a buckling analysis. The finite element model gave a much stiffer response than the test, but the maximum resistance to patch loading was in very good agreement with the test result.

Place, publisher, year, edition, pages
1998.
Keyword [en]
Technology
Keyword [sv]
Teknik
Identifiers
URN: urn:nbn:se:ltu:diva-50381ISRN: LTU-EX--98/283--SELocal ID: 7a60f9ab-8770-4812-8f96-50d7ff04d156OAI: oai:DiVA.org:ltu-50381DiVA: diva2:1023740
Subject / course
Student thesis, at least 30 credits
Educational program
Civil Engineering programmes 1997-2000, master's level
Examiners
Note
Validerat; 20101217 (root)Available from: 2016-10-04 Created: 2016-10-04Bibliographically approved

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