Unit of spring type of z-shaped runs support against main bearing structures
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.
The technical field to which the invention relates.
The invention relates to the construction, in particular to the design of the node interfaces of elements of metal structures. On these grounds the classification of the invention in effect at the time of filing the application edition of the International patent classification (IPC-alvex 2014.01) corresponds to the index ES/02.
The level of technology.
Known methods of bearing runs on the main load-bearing structure using the lap-joints of purlins on the support to ensure they nerazreznoy (standard organization HUNDRED 0061-2008 Girders and crossbars from galvanized steel cold-formed profiles are C-shaped and Z-shaped cross-section for coating systems and walls of buildings; introduction. 29.12.2008. - Moscow: zniipsk them. Melnikova, 2008. - 33 p.).
Known methods of connection of Z-shaped purlins providing their nerazreznoy, are widely used in practice currently. However, the existing methods have certain disadvantages. The connection runs on the support through their overlap is a complex structural systems in the design and cannot be represented in the form of a simple mechanical model. To work such a compound is influenced by many factors: local effects, in particular, in compressed zones of holes associated with the local stable�ivascu, the possible eccentricities of load application, the asymmetry of the cross section used types of bolts and mounting inaccuracies. As a result of the impact of these factors, the rigidity of the connection can drop and not always acceptable to consider a run as a continuous when using this connection runs at the pole.
The aim of the invention is the provision of guaranteed properties and the reliability of the reference nodes runs from holodnodeformirovannyh profiles.
Summary of the invention.
It is proposed to perform the bearing runs on the underlying multilayer structure, wherein the developer is that there are some additional Z-shaped elements stacked under runs on the support and connected between themselves and with purlin bolts through the oval holes in the walls of the elements. In this case, the transmission occurs directly from element to element without loading the fasteners in the oval holes. The fastener elements are not calculated and are used only for mutual fixation of the bearing elements of the node. The roundness of the holes provides the possibility of shifting elements relative to each other. This so-called reference node "spring type". The number puts additional elements (number of layers) and their length is determined by calculation. The actual run is�I upper element and by leaning on the "spring" can be made continuous over a support (hard site) or have a gap (elastically pliable support).
This approach allows us to redistribute the bending moments in the girder on the elements of "spring" to significantly reduce the cross section of the girder and thus to significantly improve connection reliability and stability to influence of random factors.
Technical advantages of the proposed solution is to increase the reliability and carrying capacity of the connection.
The invention is illustrated by drawings, where Fig.1 shows an example of node spring type rigid bearing of Z-shaped purlins, Fig.2 - example of node spring-type elastic-malleable support of Z-shaped purlins and Fig.3 - example of a node of the spring type of Z-shaped purlins with bending edges.
Information confirming the possibility of carrying out the invention. The implementation of the invention and its technical advantages are confirmed by the results of experimental and numerical studies.
Unit bearing Z-shaped purlin bearing capacity, including additional elements of a Z-shaped cross-section, characterized in that the additional elements of Z-shaped cross-section, nested one into the other, is mounted on a support at the run, and are connected with the purlin fasteners, bolts passed through the oval openings formed in the walls of the additional elements and run with transfer efforts directly with girder to complement�further elements without loading the fasteners in the oval holes.
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: unit of connection of tubular rods includes an upper single tubular rod with a horizontal flange at the end and a mating flange, to which ends of several lower tubular rods are fixed at the angle, at the same time ends of flanges along the perimeter are tightened by bolts, besides, the mating flange is made as separate for each lower tubular rod and with a mounting cut, at the same time ends of each tubular rod are additionally equipped with two vertical flanges, which at the outer and inner side are tightened by bolts with identical flanges of adjacent ends of tubular rods.
EFFECT: increased strength of a nodal connection under action of horizontal loads.
SUBSTANCE: contact screw butt joint of precast reinforced concrete columns includes end portions of joining columns and an embedded part placed in the lower end portion of the upper column, made in the form of an end plate with corner holes for anchor studs and equipped with angle elements to form niches, to which anchor bars are welded. In the upper end portion of the lower column there is another embedded part in the form of the end plate with the anchor studs for coupling and adjusting nuts, mounted coaxially with the holes in the end plate of the embedded part in the lower end portion of the upper column. A reinforced concrete key in the form of a truncated pyramid is located in the lower end portion of the upper column, and a groove for the reinforced concrete key is made in the upper end portion of the lower column, at that the central hole is made in the embedded part, the sizes of which correspond to the sizes of the larger base of the reinforced concrete key, and the central hole corresponding to the sizes of the open side of the groove is made in the other embedded part.
EFFECT: increase of the bearing capacity of the column and its butt joints.
SUBSTANCE: flanged joint includes joined elements with bevelled ends and flanges welded to them with stops and openings for bolts. Each flange has a rectangular opening with rounded angles, besides, the longitudinal axis of the opening and the longitudinal axis of the stop are matched with the longitudinal axis of the flange, and one end of the stop and short side of the rectangular opening are matched with each other and the transverse axis of the flange. In the assembled form the stop enters the opening of the adjacent flange with gaps at three sides and tightly to the short side of the opening matched with the transverse axis of the flange. Flanges are connected to each other by tightening bolts arranged symmetrically relative to axes of the flange.
EFFECT: increased reliability of a flanged connection with simultaneous reduction of material consumption.
SUBSTANCE: method to connect belt rod elements of a truss structure, according to which belt rod elements are connected to appropriate connection rod elements and/or with appropriate belt rod elements of the truss section. Ends of all rod elements are made with self-stopping thread. In each pair of connected elements thread at their ends is made as differently directed, and their ends are placed in contact to each other due to turning of tightening connection couplings onto ends of elements.
EFFECT: increased reliability of connection, simplified assembly of a structure.
2 cl, 2 dwg
SUBSTANCE: nodal connection includes connection angles rigidly fixed to vertical walls of rods with end plugs and shelves joined on bolts. Same connection angles with shelves joined by bolts are rigidly fixed on horizontal walls (shelves) of rods. At the same time vertical and horizontal walls of connected rod elements in the range of their attachment to leaves of connection angles are reinforced from inside with membranes arranged in parallel to end plugs.
EFFECT: increased bearing capacity of nodal connection.
SUBSTANCE: connection method involves overlapping of ends of thin-walled elements with walls on a sheet gusset plate, installation of the central bolt in the pre-drilled holes in the walls of the thin-walled elements and the gusset plate, setting of the required connection angle, final tightening of the central bolt and installation of self-drilling bolts. Before installing the centre bolt between the walls of the thin-walled elements, a nut and a head of the central bolt, convex sheet parts are installed, and final tightening of the central bolt is stopped when the edges of the sheet parts are thrust against the shelves of the connected thin-walled elements.
EFFECT: increase of the assembly bearing capacity.
2 cl, 5 dwg
SUBSTANCE: mounting assembly of a framework made of channel beams contains the rising upper flange made of two channel beams or C-shaped profiles, oriented with their walls to each other and connected to beams, with location of the bottom flange made of two channel beams between the channel beams of the rising upper flange and connected by bolts or welding. The mounting assembly has two trapezoidal sheet gusset plates or wedge-shaped volume gusset plates in the form of a bent channel beam of variable height, attached by vertical planes to webs of the channel beams of the lower framework flange and rested against the walls or bottom webs of the channel beams of the upper flange.
EFFECT: increase of the bearing capacity of frameworks made of the channel beams by reducing the bending stresses in the framework flanges.
SUBSTANCE: nodal joint of a rod space structure includes discs tightened with a pin pulled via central holes of discs. Between the discs there are tips of belt and diagonal rods. The nodal joint is equipped with a binding ring arranged between discs, coaxially with them, with a pin pulled through it. Each tip of the belt rod is made in the form of a hook, the horn of which is directed towards one of the discs and comprises an axis arranged perpendicularly to the axis of the belt rod, and each tip of the diagonal rod is made in the form of a hook, the horn of which is directed towards the other disc and comprises an axis arranged as inclined towards the axis of the diagonal rod. Horns of all hooks are arranged in the hole of the binding ring around the pin.
EFFECT: reduced labour intensiveness and higher reliability of a nodal joint.
9 cl, 6 dwg
SUBSTANCE: invention relates to the field of construction, namely, to units of connection of tubular rods, which are implemented when manufacturing supports of power transmission lines, cellular communication supports, etc. The unit of coupling of tubular rods includes an upper single tubular rod, to the end of which a horizontal flange is fixed, and a response flange, to which at the angle there are ends of lower tubular rods fixed. The response flange is made as separate for each lower tubular rod. Besides, at the end of each tubular rod there are two vertical flanges on each one, being tightened by bolts with similar flanges of adjacent ends of the lower tubular rods. The horizontal and response flanges along the perimeter are tightened by bolts.
EFFECT: increased stiffness of a unit.
2 cl, 4 dwg
SUBSTANCE: invention relates to a connection head for a system of assembly of structures with one upper end and one lower end. A middle longitudinal axis is stretching between the upper and lower end, and at least one connection flange arranged between upper and lower end with the support surface for beam adjacency. According to the invention the connection flange and the support surface have side displacement relative to the radial plane to the longitudinal axis, and the support surface is arranged in parallel to the radial plane.
EFFECT: improved design.
4 cl, 9 dwg
FIELD: building, particularly connections specially adapted for particular building parts or for particular building structures and units.
SUBSTANCE: method involved using embedded members made as metal cylindrical cartridges arranged in concrete body of units to be connected in joint area thereof and metal connection member. Cylindrical cartridge interior is previously filled with adhesive composition. One end of connection member is placed in metal cartridge of the first unit to be joined, another end is inserted in that of the second one. Flange is welded to metal cartridge end. Flange is bored at 40° - 50° for the depth of 0.5 - 0.7 of flange thickness and conical flange bore passes into cylindrical one having dimension corresponding to metal connection diameter, which forms fixing clawing funnel. Ratio between inner cartridge diameter and connection member diameter is equal to dc,in/dcm = 1.5 - 2.0, where dc,in is inner cartridge diameter, dcm is metal connection diameter. Wherein resting outline is formed in area of metal cartridge abutment to flange. Resting outline has ledge of not less than 5 mm when connection member diameter is 10 - 30 mm, which prevents shear deformation development, increases squeezing degree and blocks metal connection. Cartridge has length Lc = (10-12)·dcm, which prevents slip of metal connection.
EFFECT: simplified assemblage technology.