We investigate strong light confinement in high core-cladding index contrast waveguides with dimensions comparable to and smaller than the wavelength of incident light. We consider oval and rectangular cross sections and demonstrate that an optimal core size exists that maximizes the effective nonlinearity. We also determine that waveguides with asymmetrical cross sections provide the maximum p...

Considering the geometric nonlinearity and imperfection of stiffened cylinders, generalized similitude conditions scaling laws for axial compression post-buckling are established by applying transformation to total energy structure. The similarity cylinders is numerically analyzed, scale laws, through innovative application stiffness formulas deformation factor. Based on three type geometrical ...

In this study, FRP jackets were investigated for their confinement effectiveness on rectangular RC columns. Thirteen reduced-scale short columns were tested to failure in axial compression. Variables investigated include: the type of fibers (AFRP, CFRP or GFRP), the thickness of the jacket, the aspect ratio of the rectangular cross section and the radii of the corners. For square columns, GFRP ...

During an earthquake, structures are subjected to both horizontal and vertical shaking. Most structures are rather insensitive to variations in the vertical acceleration history and primary considerations are given to the impact of the horizontal shaking on the behavior of structures. In the laboratory, however, most component tests are carried out under uni-directional horizontal loading to si...

The chord length is an essential geometric property that must be defined in the analysis of isolated joints composed hollow steel sections, as well boundary conditions test. these parameters’ effect on behavior has been addressed by other studies, mostly with between circular sections compact or semi-compact cross-sections. Recent research about tubular cases slender where design containing sti...

During the operation of hydrocyclone cut size diameter is most important data. This connected to feed rate, which closely related cross section. Preliminary research has revealed that square cross-section more effective than circular cross-section. The compared 2 types sections at 5 different rates. One a standard rectangular and other narrows with baffle plate. calculations for have shown bett...

Carbon fiber jacketing is an efficient technique for increasing the strength and strain capacity of concrete circular square section columns subjected to axial load, although confinement efficiency decreases rectangular cross-section members. The research project BIA 2016-80310-P includes experimental program on intermediate-size plain specimens strengthened with carbon jackets, mostly cross-se...

The complete theory of curved beams in terms kinematic and stress, considering thickness effect out-of-plane loads (torsion included) is provided this paper. engineering beam approach followed; therefore, the key-point invariance cross-section shape during undeformed-deformed configuration change. normal circumferential stress tangential stresses due to torsion derive from latter assumption; ot...