Nilova T. Strength and stability of the frame elements with transversely corrugated sinusoidal web

The dissertation deals with the analysis of strength and stability of steel I-section elements with sinusoidal transversely corrugated webs. The main principles to arrange the effective cross-section including monosymmetric for frame elements are stated and a method for their design is developed. An universal model of one-story frame with monosymmetric cross-sections of constant height and with varying orientation of flanges along the element length according to design combinations of forces are designed. The thesis presents the new efficient analytical method for flange local stability analysis of elements with corrugated webs allowing for their rigid connection with corrugated web. The analyses by using finite element analysis (FEA) and LIRA software including geometric nonlinearity and steel physical nonlinearity confirmed the results numerically. The methodology of determining flange width-to-thickness ratio including corrugated web stiffness is offered.