Abstract
The article describes the features of the work of beams with a thin transverse corrugated web plate. Exponential fractional regression is presented, which allows one to estimate the relative height of web plate sections working together with flanges, obtained by the authors based on an analysis of numerical experiments. Based on the features of the work, a method is proposed for describing the stress state of an arbitrary cross-section of an I-beam with a thin transverse corrugated web plate (the profile of the corrugations is triangular, trapezoidal, sinusoidal) bent in the plane of the web plate and compressed in the longitudinal direction, using the theory of thin-web platted elastic rods by Professor V.Z. Vlasov. The calculations are given for determining the bending-twisting forces (local bending moments and bimoments arising from the action of the main forces) in an arbitrary cross section.
Highlights
The corrugation of individual elements of thin sheet structures has long been used in aircraft structures, ship structures, building structures and bridge structures
Beams with corrugated web plates are widespread in bridge building
The Kazakh branch of TsNIIPSK developed coating designs for industrial buildings, which included beams with a span of 24 m and girders with a span of 6 m, the elements were designed with welded I-sections with thin transverse corrugated web plates
Summary
The corrugation of individual elements of thin sheet structures has long been used in aircraft structures (corrugated web plates of wing spars), ship structures (corrugated bulkheads, corrugated hatches, corrugated panels of the hulls), building structures (columns, beams, arches) and bridge structures (corrugated web plates of spans). The use of corrugated structures in the form of load-bearing elements of buildings first began in the mid-1960s in Sweden and Germany. In Russia, the use of corrugated structures began actively in the 80s of the last century. The Kazakh branch of TsNIIPSK developed coating designs for industrial buildings, which included beams with a span of 24 m and girders with a span of 6 m, the elements were designed with welded I-sections with thin transverse corrugated web plates. The most common corrugated structural element is a welded beam of an I-section with a corrugated web plate, the thin web plate of which is continuously corrugated by open (extending orthogonally to the longitudinal axis of the rod) corrugations of inclined (triangular), wavy, parabolic, trapezoid profiles.
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