Mounting assembly of framework made of channel beams
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.
The invention relates to the field of construction and relates to support assemblies farms, the upper belt are made of channels with overlapping walls on shelves channels of the lower belt.
Known solution to the reference node in the farm of channels, in which the lower belt, made of two channels, and the upward support brace of the two channels are connected to the vertical fasone (see STANDARD ORGANIZATION, Melnikov them. Melnikova, a HUNDRED 0066-2011. Moscow, 2011. 13)
The disadvantage of the reference node is its high deformability of the plane of the farm.
Known farm of channels containing straight lower zone of the two channels or C-shaped sections connected by walls, the top trending belt of two channels collected on planks, with the location of the channels of the lower belt between the channels of the upper belt and the lattice farm of channels, which nolastname shelves on the wall of the upper chord bars, and the lower span of the nodes in the farm decided on the gussets to run the farm on the bolts or welding (see patent RU 2415233 C1, bull. No. 9, publ. 27.03.2011).
However, in the analog reference node is not removed.
The prototype of the invention is welded base node triangular farm, containing the upper zone of the two channels, between which is located the lower zone from one channel connected to overlap with the centering axis is terina through vertical and horizontal gussets (see series 1.860-1 "Steel structures covering industrial buildings". Issue 1. "Cover with a triangular truss span and 12,0 18,0 m". CICM. Moscow, 1971).
Because of the acuteness of the angle of the pair of rods of the upper and lower belts in the reference node of the farm belt have large Flexural stresses from the turn of the node, which leads to increased material consumption on the farm, in addition, this solution cannot be applied to farms galvanized profiles bolted connections.
The purpose of the invention is the increase in the carrying capacity of the triangular trusses of channels by reducing bending stresses in trusses and facilitate implementation of the reference node.
The result is achieved that the reference node in the farm of channels, containing upward of the upper zone of the two channels or C-shaped profile oriented walls to each other and United in a frame, with the location of the lower zone of the two channels between channels of the rising of the upper belt and United by bolts or welding, according to the invention, has two trapezoidal sheet gussets or wedge-shaped volume gussets in the form of a curved channel variable height, hinged vertical planes to the shelves of the channels in the lower tier of the farm and the ultimate in wall or the bottom shelf of the channels of the upper belt.
The invention is explained in the precincts of the AMI, where: figure 1 shows a diagram of the farm, for example, by bolts, figure 2 - a basic element of the farm with two trapezoidal flat gussets in figure 3 - supporting element is a farm with a wedge-shaped volume gussets in the form of a curved channel variable height.
The reference node is solved for the farm of the channels containing a straight lower belt 1 made of two u or C-shaped profile 2, connected by walls, and the upper belt farm 3 of the two channels 4, collected on planks, with the location of the channels 2 of the lower belt 1 between the channels 4 of the upper belt 3, which nolastname their walls on shelves belt channel 2 lower belt 1. The reference node of the farm has two trapezoidal vertical sheet gussets 5 or wedge-shaped surround the bent gussets in the form of a curved channel variable height 6 connected by welding with the centering strip 7. Fasolki 5 or 6 vertical planes 8 are attached to the shelves of channel 2 of the lower belt 1 farm and rest against the wall or the bottom shelf of the channels 4 of the upper belt 3 of the farm. The reference node with gussets 5 is designed for farms of rolled channels, with gussets 6 - for farms of bent channel or C-shaped profiles.
Support node operates as follows: the reaction from the column is passed through the centering strip 7 on fasolki 5 or 6, which is passed through the vertical plane 8 transmit this reaction on the walls of the channels 3 of the upper belt farm, and the tensile stress from the lower zone of the farm is transferred to the walls of the channels of the upper belt 3 through bolts 9. The bolts 10 are mounting and transferring of forces are not involved.
The invention allows to perform anchor node in the farm with disposable eccentricity e, which reduces the bending stresses in the upper zone of the farm 3, which has a positive impact on the carrying capacity of the farm. The magnitude of the eccentricity e depends on the efforts and moments in the trusses and is determined by calculation.
The most rational scope of the reference node are bolted farm of bent profiles span from 15 to 24 meters
The reference node in the farm of channels, containing upward of the upper zone of the two channels or C-shaped profile oriented walls to each other and United in a frame, with the location of the lower zone of the two channels between channels of the rising of the upper belt and United by bolts or welding, characterized in that it has two trapezoidal sheet gussets or wedge-shaped volume gussets in the form of bent bars, variable height, hinged vertical planes to the shelves of the channels in the lower tier of the farm and the ultimate in wall or the bottom shelf of the channels of the upper belt.
SUBSTANCE: truss is made of straight box-shaped belts with a triangular or a diagonal web. Single-shear ends of diagonals are connected by welding with belts. First half-trusses are manufactured in accordance with the project. The upper belt is laid, which comprises a flanged mounting joint of the belt and a support unit of the half-truss. The support unit comprises two gusset plates welded to the belt to continue the plane of walls of the upper belt. A support plate of the half-truss is welded perpendicularly to the gusset plates. Then the lower belt of the truss is laid with width equal to the upper belt, which comprises a flanged mounting joint of the lower belt of the half-truss. Afterwards rods in the web of the rising direction of the half-truss are butt-welded to the belts, making them box-shaped and equal in width to belts of half-trusses. Then rods of the web of lowering direction are laid as overlapping over the units of the half-truss, making them from two parallel unequal-sided angles or strips. Strips are pre-stressed, being tightened in the middle with a bolt.
EFFECT: reduced labour intensiveness of manufacturing.
SUBSTANCE: method includes manufacturing of belts, installation of rods of a triangular lattice in truss units and their connection by means of bolts or welding. Belts are made as through from two C-shaped profiles or channels. Lattice rods are made of a similar single profile. Lattice rods are installed as overlapping onto walls of belt profiles of the truss or on its gusset plates. Previously 3D sheet plates of H-shaped cross section are manufactured for units of belt fracture. Plates have contact surfaces of parallel sheets with elements of the truss equal to the height of the lattice profile cross section. For span units of the upper belt the parallel sheets of H-shaped cross section of the plate are arranged as stepped. The height of the step is equal to the thickness of the plate sheet. Then lattice rods and straight sections of the truss belts are attached to the plates. Afterwards the remaining lattice of the truss is installed between belt profiles of the truss, and planks of the truss belts are fixed.
EFFECT: simplified manufacturing.
SUBSTANCE: method of manufacturing includes assembly of belts and welding of a grid to belts with subsequent disassembly of a truss along mounting joints into deliverable assemblies. Belts assembly is carried out for the whole span with belts bending. At first both belts with breakdown into deliverable assemblies are assembled as straight on bolt flange joints. Then box belts are cut in units of belts fracture along the outer shelf and two walls of the section, and belts are bent along non-cut shelves along with the truss contour. Plates with thickness equal to an open gap in the section shelf are installed into open cuts of belts. The plate is welded to cut shelf and walls of the section. Afterwards the truss grid is installed and welded to the belts. After welding of assembly joint plates, the truss is disassembled into deliverable assemblies, and inaccessible welded seams are welded additionally in deliverable assemblies.
EFFECT: simplified manufacturing and higher accuracy of deliverable assemblies jointing to each other.
SUBSTANCE: channel truss comprises dual-slop upper, horizontal lower belts, descending near-support braces and grid. Belts are made of two channels joined on planks. Near-support braces are made of two channels fixed by walls, and joined to walls of belt channels by overlapping shelves. Grid is made of single channels and is attached to upper and lower belts via gusset plates with self-drilling screws, bolts or through welding. Whole truss and its gusset plates are made of a single section of channel. Gusset plates are arranged in the form of two pieces of channels, which are fixed with their overlapping shelves to shelves of belt channels, and by walls - to shelves of grid channels.
EFFECT: reduced labour intensiveness of truss making.
2 cl, 3 dwg
SUBSTANCE: method of long-span truss manufacturing out of straight rolled profiles involves the following stages. First truss girds are assembled of pack comprised by two or more straight flexible rolled profiles. Then girds undergo elastic bending to obtain desirable contour. Afterwards profiles are welded in girds, truss grid is assembled, and truss is cut into shipping units.
EFFECT: reduced labour cost of production, flowing contours of truss girds.
FIELD: construction, structural elongated elements designed for load-supporting, particularly building coverings, namely camber trusses.
SUBSTANCE: method involves making straight lower belt, resiliently bending thereof in truss plane in accordance to truss flexure function of constant load; reworking truss and disassembling thereof into marked sections for further transportation.
EFFECT: possibility to relief transverse stresses in truss.
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
SUBSTANCE: girder supporting joint on truss includes upper truss band and adjoining diagonal braces with misaligned axes. In a truss joint, a girder rests on truss band with eccentricity causing the joint to rotate in a direction opposite to rotation caused by brace misalignment. Crossing point of upper band axis with compressed diagonal brace axis is considered to be the centre of truss joint rotation, and girder support eccentricity is e=M/P where M is the joint torque in girder generated by forces in diagonal braces adjoining the band; P is a force exerted by the girder on upper truss band.
EFFECT: reduced material consumption per truss in girder coverage.
SUBSTANCE: joint comprises ends of connected elements with separate flanges along the height of the cross section and bracing bolts. A curvilinear sheet gusset is placed between separate flanges. The gusset is fixed by the ends to flanges, and along the convex surface - to the preliminarily cut cross section of the connected elements.
EFFECT: increased bearing capacity of a connection.
SUBSTANCE: each crossbar is concreted with support cantilevers, in a groove is made in the pillar. Connecting elements of the crossbar are made in the form of a steel rope with clamp couplings pressed at its ends. Concrete extraction is continued until the working reinforcement of the pillar is exposed. The crossbar comprises support cantilevers from a steel rolled shape with protrusion outside the limits of the crossbar end. Each of rope elements is preliminarily folded in two to form a loop protruding beyond the end of the crossbar. Ends of rope elements are solidified in the body of the crossbar. Then crossbars are installed into the design position relative to the pillar. Afterwards in the pillar recess they bend the loops of ropes, which are inserted between the working reinforcement of the pillar, and then spread into the design position. Additional reinforcement rods are placed inside the loops of the ropes. Afterwards the formwork and the node of connection are installed in the volume of the recess and filled with concrete.
EFFECT: lower labour intensiveness of assembly, increased operational capabilities and reliability.
SUBSTANCE: universal building element includes a wooden rod with steel tips fixed at the ends and equipped with connecting elements. The wooden rod is made with square or round section and is equipped with central holes in ends for a connection element. The tip is made as capable of using connecting elements of various type installed on it and is formed by an end pad with a central threaded hole that adjoins the end of the wooden rod and combines diametrical opposite four add-on flat plates with holes, with the help of which the steel tip is installed and fixed on the wooden rod by means of dowels pressed in it via holes in the specified plates of the tip. Side surfaces of the ends of the wooden rod of round section that interact with the tip are made as flat in mutually perpendicular directions.
EFFECT: increased strength characteristics.
7 cl, 11 dwg
SUBSTANCE: nodal joint comprises a collapsible nodal element, made of joined four-face gussets with holes in walls, to which rod ends are fixed by bolts. The joint comprises a hollow metal core of square section arranged in the centre of the nodal joint and a combining gusset. Each of gussets is made with a shelf and vertical walls, two of which are mutually perpendicular, and the wall located between them is connected with the core wall. Between adjacent walls of the gussets there is a gap, in which there is a tip of a rod element. The core is equipped with a central bolt, rigidly fixed with the help of a pad in its base with a protruding end. The core base is arranged in the nodal element with a ledge in respect to the external face of the gusset shelf. On the protruding end of the central bolt there is a disc pad adjoining the core base and equipped with holes that match holes in the shelves of gussets in their location. Between the disc pad and the shelves of gussets there is a gap, where tips are installed and fixed.
EFFECT: higher joint reliability.
3 cl, 9 dwg
SUBSTANCE: unit of frame coupling includes a latticed crossbar and a V-shaped column. The crossbar is made with belts from channels or C-shaped profiles. Between the walls of the crossbar belt profiles there are shelves of channels or C-shaped profiles of the column coupled with walls arranged and fixed as overlapping. Units of crossbar belts crossing with column belts are connected by diagonals. Diagonals are made of two steel strips with width of at least one and a half height of the crossbar belt profile. The thickness of strips makes at least a half of the crossbar profile or column thickness. Diagonals are arranged in units of crossbar and column crossing between their belts. Diagonal links of identical directions are tightened to each other by bolts.
EFFECT: simplified manufacturing of a frame and its units of coupling of a frame crossbar with columns.
SUBSTANCE: unit of a metal frame carcass of a building includes a double-tee column, combined with a double-tee beam, which creates a column cantilever, which is rigidly connected in the zone of least bending torques by means of flanges on high-strength bolts with a crossbar, having the cross section corresponding to the section of the column cantilever. The column is equipped with an upper stiffening rib and paired lower stiffening ribs, symmetrically arranged at both sides of the column wall in the level of the lower shelf of its cantilever. Between the upper and lower stiffening ribs of the column in parallel to its shelves there is a vertical rib for connection of the spacer and the vertical link to it, and to the column wall above the neutral axis of its cantilever and in parallel to its shelf there is a polygonal plate attached to the shelf, and this plate protrudes beyond the edge of the upper stiffening rib, for fixation of the horizontal link. Central longitudinal axes of the spacer, horizontal and vertical links are connected in one point arranged in the frame plane.
EFFECT: unit strength improvement.
3 cl, 1 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.
FIELD: building, particularly means for connecting building structures.
SUBSTANCE: joining device comprises several similarly sized members overlapped so that non-contacting parts are spaced apart. The members are connected with bolt. Connection parts of each member are formed as rimmed orifice having extension and depression with central aperture. Bend is made on one member side. Extension and depression may be shaped as cone, ball or truncated pyramid and formed on one or both member ends. Bolt has a cavity, outer contour of bolt head mates that of inner depression.
EFFECT: reduced labor inputs for building structure mounting and demounting.
2 cl, 4 dwg
FIELD: building, particularly for forming wooden arches, frames and trusses.
SUBSTANCE: ridge unit comprises adhesive-bonded wooden members, hinge and covering members. Unit is provided with glass-fiber plates defining curvilinear section in plane and glass-fiber semispherical heads arranged in glass-fiber plate centers. Semispherical heads are inserted in depressions made in glass-fiber centering rim. The rim edges are inserted in slots of wooden covering members. Glass fibers in curvilinear plates are oriented along plate height and width of adhesive-bonded wooden member ends. The plates does not project beyond boundaries of above ends.
EFFECT: increased strength and reduced material consumption.