Currently, steel manufacturing technology has been developing, high- performance steel is applied to the structures. So it is available for design lightweight and economical steel structures. However, the cross-sectional area of structure is getting slender, stability review against local buckling i...
Currently, steel manufacturing technology has been developing, high- performance steel is applied to the structures. So it is available for design lightweight and economical steel structures. However, the cross-sectional area of structure is getting slender, stability review against local buckling is required. In order to prevent the local buckling, installation of the stiffener is necessary. Especially, plate girder web panel is weak against local buckling, since the thickness of web panel is thinner than the flange. Up to now, there are lots of research about shear resistance of symmetric plate girder. On the other hand composite and single-axis symmetric plate girder, there is much to be desired. Moreover, current design specifications do not consider additional shear resistance due to using composite section. Therefore, it is necessary to estimate the accurate strength of composite plate girder web panels for reasonable design.
When estimating shear buckling strength of plate girder, shear buckling coefficient is one of major impact factor. Shear buckling coefficient is factor depending on boundary conditions and the cross-sectional aspect ratio. In the current design specifications, they assume the boundary conditions of plate girder juncture between the flange and web simply supported which is conservative assumption. While shear buckling occurring at the plate girder web panels under shear, rotational displacement occurred at the flange by effects of flange-web interactive buckling behavior. So the boundary conditions of plate girder juncture between the flange and web is closer to a fixed support.
In this study, the physical meaning of interaction between flange and web of the composite plate girder under pure shear was defined, which is the ratio of flange-torsional-stiffness and web-bending-stiffness; flange-web stiffness ratio.
Furthermore, by conducting analytical study based on finite element modeling, investigate the effects of the geometric parameters on the shear buckling coefficients and propose the new design equation of shear buckling coefficients using flange-web stiffness ratio.
Currently, steel manufacturing technology has been developing, high- performance steel is applied to the structures. So it is available for design lightweight and economical steel structures. However, the cross-sectional area of structure is getting slender, stability review against local buckling is required. In order to prevent the local buckling, installation of the stiffener is necessary. Especially, plate girder web panel is weak against local buckling, since the thickness of web panel is thinner than the flange. Up to now, there are lots of research about shear resistance of symmetric plate girder. On the other hand composite and single-axis symmetric plate girder, there is much to be desired. Moreover, current design specifications do not consider additional shear resistance due to using composite section. Therefore, it is necessary to estimate the accurate strength of composite plate girder web panels for reasonable design.
When estimating shear buckling strength of plate girder, shear buckling coefficient is one of major impact factor. Shear buckling coefficient is factor depending on boundary conditions and the cross-sectional aspect ratio. In the current design specifications, they assume the boundary conditions of plate girder juncture between the flange and web simply supported which is conservative assumption. While shear buckling occurring at the plate girder web panels under shear, rotational displacement occurred at the flange by effects of flange-web interactive buckling behavior. So the boundary conditions of plate girder juncture between the flange and web is closer to a fixed support.
In this study, the physical meaning of interaction between flange and web of the composite plate girder under pure shear was defined, which is the ratio of flange-torsional-stiffness and web-bending-stiffness; flange-web stiffness ratio.
Furthermore, by conducting analytical study based on finite element modeling, investigate the effects of the geometric parameters on the shear buckling coefficients and propose the new design equation of shear buckling coefficients using flange-web stiffness ratio.
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