Design Tool for the Ultimate Bending Resistance of Steel-Concrete Compos ite Bridge Girders with Flat and Corru gated Web Plates made of Stainless Steel
Typ
Examensarbete för masterexamen
Master's Thesis
Master's Thesis
Program
Structural engineering and building technology (MPSEB), MSc
Publicerad
2023
Författare
KARLSSON, ALBIN
FRIMAN, GUSTAV
Modellbyggare
Tidskriftstitel
ISSN
Volymtitel
Utgivare
Sammanfattning
Stainless steel may be a relatively expensive material choice, however, its
remarkable and sustainable material properties can make it a great option for steel-concrete composite beams in bridge construction. Stainless steel provides a ductile behaviour with substantial strain hardening, and if combined with a corrugated web, the plastic capacity can be utilized even further. Eurocode only provides an analytical
calculation method for carbon steel beams with an elastic perfectly plastic calculation
model, furthermore, corrugated webs are completely disregarded in bending. For a
beam with stainless steel and a corrugated web, this provided method is especially
conservative.
The aim of this master’s thesis was to develop a design tool capable of
calculating the ultimate bending capacity for beams with different materials and geometry,
also, incorporating behaviour models from recent research of corrugated beams and
stainless steel.
The tool was tested for stability with shifting location of the neutral axis and the
bending capacity was verified with a comparison to finite element analysis in a case
study. The resulting comparisons between the design tool and finite element analysis
suggest that the tool preforms satisfactory with bending moment capacities closer
to the simulations compared to the conservative Eurocode models. This imply that
the elastic perfectly plastic calculation model is not recommended for beams with
stainless steel and high levels of strain hardening.
Even though the design tool is stable and yield good results, parts of it still needs
additional validation and development. More research in this topic is needed in
order to get a better understanding of the actual behaviour of this type of beams. At
the moment the available research is limited, especially for steel-concrete composite
beams with corrugated webs.
Beskrivning
Ämne/nyckelord
Steel-concrete composite beam, Stainless steel, Strain hardening, Corru gated web, Ultimate bending capacity, Design tool