Steel concrete beam
SUBSTANCE: steel concrete beam comprising the upper and lower belts, the wall and the concrete located in a closed loop in the upper part of the beam section, has a closed loop for the concrete location. The closed loop is formed by the upper belt and the wall consisting of two sheets bent outwards in the upper part of the beam in accordance with the diagram of normal compressive stresses in the cross sections of the beam. The upper edges of the wall sheets are spaced in the horizontal plane and form along the beam length two curves corresponding to the bending moment diagram in the beam. The upper interface points of the wall sheets are located on a vertical curve corresponding to the bending moment diagram in the beam. And the wall sheets are united by retainers of variable length, which give it the curved shape along the beam height and length.
EFFECT: reducing the material consumption of the steel-concrete beam.
SUBSTANCE: side member for performance of concrete works includes a support iron. The iron comprises a support foot that faces with its lower surface to the base and is made as capable of direction fixation on it with the help of fixtures. The iron comprises two vertical guide elements made as a whole with the support foot and stretching from it in parallel to each other to create a gap between them. The gap provides for location of a sliding element made as capable of displacement in the vertical direction relative to vertical guide elements and fixation to them.
EFFECT: elimination of cavity formation during hardening of filling material, provision of identical density of filling material during its hardening and reduction of labour intensiveness of member installation.
20 cl, 3 dwg
SUBSTANCE: truss comprises ascending compressed support and intermediate braces, stands and descending stretched braces. Upper and lower belts of the truss are made of equally stable double-tee sections. In the most stressed zone in the middle of the span the upper belt is converted into a tubular one by means of welding of closing sheets at sides to the double-tee section. All compressed elements of the truss lattice are made of oval pipes with the ratio of larger dimension to smaller one equal to three. Oval pipes are aligned with a larger dimension perpendicularly to the truss plane. Compressed braces are detached by two struts in the truss plane. After installation of the truss into the design position, hoses of concrete pipelines are connected to nozzles of closed tubular elements of the truss. Fine-grained expanding concrete is injected into cavities of elements with formation of guncrete elements after concrete setting.
EFFECT: improved durability and reliability of a truss.
SUBSTANCE: in a composite beam structure there is one or more parts in the form of boards and a beam are connected together by means of an ingot. The beam structure comprises a steel beam, above which there is one or more mounting pins. Length of mounting pins at least three times exceeds the width of the upper surface of mounting pins. The pin is arranged with the possibility to transfer a force in connection between concrete and steel in the vertical and longitudinal direction relative to the beam. In a transverse cut perpendicular to a longitudinal direction of the pin there is at least one part, in which the pin width is more than on a section arranged directly below.
EFFECT: high-quality combination of technical parameters of a beam.
15 cl, 10 dwg
SUBSTANCE: beam comprises compressed and stretched belts and wall. Wall consists of metal sheets perpendicular to planes of belts. Metal sheets have traditional or alternate corrugation on part of length as transverse to longitudinal axis of beam. Cavities formed between metal sheets on sections of intense transverse forces are filled with concrete. Corrugations on these sections remain with section permanent along wall height.
EFFECT: reduced metal intensity and increased bearing capacity of beam.
9 cl, 13 dwg
FIELD: building, particularly profiled beams to construct floor coverings with thickness of 25 - 40 mm for arranging finishing floors and other structures, for instance for flat roofs.
SUBSTANCE: profiled beam comprises longitudinal load-bearing member, two perforated side walls connected with bearing member and perforated bases extending from them in opposite directions. Each base has bent end forming longitudinal three-edged extension. The first edge is perpendicular to the major part of base. The second edge is parallel to the second one, the third extreme edge forms an angle of not less than 90o with the second one.
EFFECT: improved cohesion ability between beam and covering material.
8 cl, 5 dwg
SUBSTANCE: unit is made using additional elements of Z-shaped cross section, which are inserted one into the other under a run on a support and are connected to each other and to runs using bolts via oval holes in walls of elements. At the same time forces are transferred directly from an element to an element without loading of fastening elements in oval holes.
EFFECT: increased bearing capacity and reliability of a supporting unit.
SUBSTANCE: beam with a continually retained wall comprises a compressed and an extended belts and a wall, besides, a flat wall in areas of action of transverse forces and/or torques of considerable intensity is reinforced by mostly transversely installed stiffening ribs in the form of preferably metal shapes adjoining each other with a gap providing for reliable connection of ribs to each other and to a wall, at the same time the shape and calibre of ribs may change along the length of the wall in accordance with variation of intensity of acting forces.
EFFECT: reduced material intensity of a beam and its increased bearing capacity.
9 cl, 5 dwg
SUBSTANCE: biplastic beam consists of the upper and lower flanges, a vertical wavy wall, an adhesive composition and stiffening ribs, installed in bearing sections and places of the application of concentrated loads. The upper and lower flanges are made of carbon fibre channels, the walls of which form the upper and lower edges of the beam, at that the vertical wavy wall made of fibreglass plates is adjacent to inner horizontal surfaces of the upper and lower flanges by longitudinal edges, and glued to the inner vertical surfaces of the upper and lower flanges by ridges, at that the inner space of the channels is filled with the adhesive composition, and stiffening ribs are glued to the vertical wavy wall and to the upper and lower flanges.
EFFECT: increase of the load-bearing capacity of the beam, its torsional stiffness.
4 cl, 6 dwg
FIELD: machine building.
SUBSTANCE: invention is related to long-length hollow multisided profile. A long-length hollow multisided profile intended to be used in support structures of pipelines and cable conduits has at least three sides, and a bolt hole is provided on at least one side of the profile and a fixing hole is provided on at least one side of the profile. Two adjacent sides located in essence at a right angle to each other are fitted by bolt holes with the length of the latter in longitudinal profile direction being greater than that in transverse direction, the third profile side is fitted by a fixing hole that provides for passing of a bolt through the fixing hole to the bolt holes on both adjacent sides located in essence at a right angle to each other.
EFFECT: lower labour inputs for the connection of the profile to other components, reduced labour expenditures.
5 cl, 4 dwg
SUBSTANCE: beam with a wall corrugated with an asymmetric profile comprises a compressed and an extended belt and a wall. The wall at least on some sections is traditionally or alternately corrugated with transverse corrugations. The profile of corrugations is asymmetric relative to the plane stretching via the corrugation top and normal to the longitudinal axis of the beam.
EFFECT: increased bearing capacity of a beam.
10 cl, 8 dwg
SUBSTANCE: shape comprises two shelves and a side wall between shelves with a groove in the central part. Shelves contain perpendicular bends directed towards each other. The groove forms ledges with height exceeding shape thickness. The shape is made as capable of coupling and joining of two shapes. Shelves are made of different width, with a difference equal to double thickness of the shape. Ledges are made of different height, with a difference equal to thickness of the shape. The large ledge is arranged at the side of the larger shelf. The composite element comprises a coupled pair of single-type shapes. Shapes are turned towards each other by inner surfaces and are matched to form a shape element of closed box-shaped cross section. The large shelf covers a smaller shelf coupled with it at the opposite sides of the element.
EFFECT: higher bearing capacity and reduced labour inputs in manufacturing.
8 cl, 4 dwg
SUBSTANCE: invention pertains to construction, in particular to constructions of netted thermo profiles with C or U-shaped section, used as bearing frame elements of pre - fabricated buildings, roofs, fronts, balcony walls, where it is necessary to eliminate "cold joints" effect, and to the method of manufacture of netted thermo profiles. Set task is solved through consecutive vertical drawing of slots made in the central part of the blank symmetrical to the profiling axis from utter rows of the blank to the center in drawing cages forming a netted construction, and further in smoothing cages netted construction is displaced from the center to the edges by smoothing rollers with simultaneous leveling of the netted surface, whereat cells in internal rows of the netted construction acquire diamond shape, and lateral - triangle shape with rounded top, thereat excess of longitudinal draw of the metal on the bridges between the through cells are eliminated by knurling in the shape of buckles in the extension zone.
EFFECT: creation of netted thermo profile having smaller width of the initial blanks (strip) to save up material, retaining geometric characteristics and heat conduction of thermo profiles of identical cross section.
3 cl, 5 dwg
FIELD: technological processes.
SUBSTANCE: method for thermoprofile production involves strip feed to profile bending mill, sequential transit-wise element overcast by profile-bending mill rollers, perforation of slit row with deflanging in apron form, in checkered order on profile wall. Before feeding to profile-bending mill strip is unrolled from roll and shifted to form compensation loop. After perforation of slit row the profile surface is evened in leveling unit with further profile cutting at given length. Transfer line of cold shaping for thermoprofile production includes profile-bending mill with instrumental adjustments, device for perforation of checkered pattern of slits deflanged in apron form in wall of continuously moving profile. Unrolling and receiving units are positioned in series before profile-bending mill, and after slit perforation device a cutter is positioned. Slit perforation device features leveling unit.
EFFECT: extended functional capacities.
2 cl, 1 dwg
FIELD: building, particularly load-bearing structure of different buildings and building structures.
SUBSTANCE: beam comprises main frame composed of upper and lower belts and stiffening ribs arranged in-between, side walls of corrugated thin sheets connected with the frame so that corrugations of the sheets extend along longitudinal beam axis. Beam also has reinforcing ribs extending along longitudinal beam axis and arranged in side wall corrugations. The reinforcing ribs have flanges unconnected with stiffening ribs and belts along the full beam length or in beam zones characterized by maximal stresses.
EFFECT: increased load-bearing reliability, rigidity and stability in plane of flexure.
2 cl, 4 dwg
SUBSTANCE: invention relates to the field of construction, in particular to a concrete building with a volume of lightweight steel frame and a process for its construction. The building includes a wall surrounding a lightweight steel frame, a panel overlap surrounding the light steel frame, coupled with a wall surrounding the lightweight steel frame to form a volumetric light steel construction section, and concrete is poured into the volumetric light steel frame of the construction section. Each wall surrounding the light steel frame and the panel surrounding the light steel frame contain an overlap of welded mesh reinforcement, and multiple steel lattice sections, separated from one another and each having multiple holes stretched. Each steel grid profile consists of two parallel ribs and the multiple corner webs there between formed as a single piece. Jumpers and stretched holes limit the bridges formed by stretching the angled edges.
EFFECT: lower consumption of metal and reduced complexity of construction of buildings.
12 cl, 7 dwg