Thesis supervisor: Balázs Géza Kövesdi
Location of studies (in Hungarian): BME Hidak és Szerkezetek Tanszék Abbreviation of location of studies: BMEHS
Description of the research topic:
The application of high strength steel in the bridge design is currently limited by the inappropriate design methods and the uneconomical and conservative application of the design models developed for normal strength steel structures. The current research aims to develop design methods, which improve the economic application of high strength steel in bridges. The research purposes contain the improvement of the flexural buckling resistance model of steel I-section columns and the local buckling resistance models for plates and plated structures to make them applicable for high strength steel structures using deterministic and stochastic methods. Previous research results show that residual stresses and geometric imperfections of high strength steel structures are more favorable than for normal strength steel structures, which has a positive effect on the flexural buckling resistance, but it has minor effect on the plate buckling behavior. Therefore, the two stability phenomena should be investigated separately and their interaction has to be studied as well.
In the frame of the PhD research an extensive literature review should be completed in the topic of the stability behavior of high strength steel structures. Research program has to be developed for the investigation of the (i) flexural buckling resistance of high strength steel I-section columns, (ii) plate buckling resistance and (iii) interaction of the two stability phenomena. An advanced numerical model should be developed to determine the structural behavior and resistance of various girder geometries using both deterministic and stochastic methods. Based on the previous test results and the current numerical investigations the final research aim is the development of improved traditional and advanced, FE-based design methods to determine the flexural buckling resistance of I-section columns, the plate buckling resistance and the interaction resistance for high strength steel structures.
Number of students who can be accepted: 1
Deadline for application: 2018-05-31
2024. IV. 17. ODT ülés Az ODT következő ülésére 2024. június 14-én, pénteken 10.00 órakor kerül sor a Semmelweis Egyetem Szenátusi termében (Bp. Üllői út 26. I. emelet).
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