Nodal connection of spatial frame rods
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.
The proposed technical solution relates to the field of construction and can be used in the nodal connections of the truss elements of the spatial framework of buildings and structures.
Known nodal connection two lap spatial design with trim corners of the ends of the rod elements of the zones in which one of the shelves each corner of fasolki performed by broadening for fastening with the core elements of the lattice [Orlik VM host connection of spatial beam structures. - Copyright certificate №648703, 25.02.1979, bull. No. 7]. Design collect on the bolts without welding.
The disadvantage of this nodal connections is the need for double cutting tubular elements, which increases the complexity of manufacturing. In addition, the bolted joints of corner gussets require compliance with high precision as in the manufacture and installation of structures.
Known to the node connecting rods spatial structure in which the core elements are connected to each other by bolts with angular tips and overlays, with angular lugs attached to the ends of the diagonal elements of the lattice, and pads to the ends of the horizontal belt elements [Gwatkin US the Node connecting rods spatial structure. - Patent No. 2087634, 20.08.1997, bull. No. 23].
what dostatkom node connection is that the rod elements connected in it, not structurally similar. Some of them have flanges, the other corner pads, which increases mnogodelnosti and complexity nodal connections.
The closest technical solution to offer (prototype) is a hub connecting the cross-beam structures, which is rigidly attached to the waist rods connecting parts connected between the shelves by means of bolts and placed in the angles formed by the side edges (vertical walls) core elements of the belts of a rectangular (or square) of tubular profiles. In this case coupling parts attached to their feathers to the vertical walls (lateral faces) so that coupled by bolts shelves are oriented to the center of the nodal connections [Avanesov SR, Marutyan A.S., Sargsyan O.V. Hub connection cross-beam structures. Copyright certificate №1428824, 07.10.1988, bull. No. 37].
The disadvantage of the described solution is a planar arrangement of the core elements of the zone that does not allow it to be applied at the nodal connection of the spatial framework. For their spatial location of the oblique cut in the pen areas and connecting areas, which complicates the hub connection. In addition, the carrying capacity of such slovosochetaniya in the spatial frame with heavy loads, includes crane and seismic effects, limited concistently gotowanych rectangular (or square) profile rod belt elements, which can cause pushing (pulling out) of the wall section of the lap element in contact with the connecting area.
The technical result of the proposed solution is to expand the applications node of the connection rod elements of a rectangular (or square) of tubular profiles, and increased load capacity, it can be used in spatial frameworks, including dynamic loads significant intensity.
The technical result is achieved due to the fact that the node connection rods spatial frame including rigidly attached to the vertical walls of the rods connecting the corners of the end caps and stacked on the bolts shelves, such as connecting the corners with stacked bolted shelves fixed to the horizontal walls (shelves) rods. The vertical and horizontal walls connected rod elements in the alignment of their attachment to the feathers of the connecting corners are reinforced from the inside diaphragms arranged parallel to the end caps.
The proposed nodal connection is on the fairly universal technical solution. It can be used, for example, in the absence of dynamic loads of considerable intensity, including crane and seismic effects, when the carrying capacity is quite achievable without diaphragms, which positively affects both the complexity of supporting structures and consumption of construction material. When the rods of one of the directions at the nodal connections it is advisable to produce one piece (uncut), thereby reducing the duration of the installation of the spatial framework.
The proposed solution is illustrated graphic materials, in which figure 1 shows a hub connecting rods spatial frame of tubular profiles with square (rectangular) cross-section exploded views, axonometric view; figure 2 - hub connection with one piece (uncut) the core element of one of the directions disassembled, axonometric view; figure 3 is a fragment of the spatial framework in General.
Hub connection terminals 1 a spatial frame of tubular profiles with square (rectangular) cross-section contains rigidly attached to the vertical and horizontal walls by means of welds connecting the corners of the 2 shelves which are connected by bolts 3, placed in the axial hole 4. (In the image on the visible portion of the hub to connect the texts bolts 3 conventionally not shown.) Wall connected to the terminals 1 and the connecting parts 2 from their feathers, more close to the center of nodal connections, reinforced end caps 5. From feathers, more remote from the center hub connection, the connecting parts 2, as well as the walls of the rods 1, reinforced diaphragms 6, arranged in the cavity of each of the tubular elements parallel to the stub 5.
Amplifying element of the proposed nodal connections made in the form of paired, parallel, sheet parts (plugs 5 and the diaphragm 6). This constructive design it differs from similar reinforcement element in the form of a single orifice of known solutions bespozvonochnoe node tubular farm [Levitansky IV attachment of the braces to the tubular belt bespozvonochnoj farm. - Copyright certificate №540019, 25.12.1976, bull. No. 47). It is obvious that the installation and welding end plugs 5 must be preceded by the same technological operations with the apertures 6.
If the intensity of the loads on the spatial frame is such that the load-carrying capacity of joints of his rods may be provided without apertures 6, the rod elements 7 one of the areas it is advisable to produce one piece (uncut) connecting the nodes.
The connecting parts and the amplifying elements of the proposed nodal connections of the rods about transtorno frame in assembled form are the basis of formation of nodes with futami, representing nodal reinforcing members geometrically invariant (triangular) shape, able to perceive and transmit significant efforts, including bending and torsional moments.
Hub connection rods spatial frame including rigidly attached to the vertical walls of the rods connecting the corners of the end caps and stacked on the bolts shelves, characterized in that the connecting parts with stacked bolted shelves fixed to the horizontal walls (shelves) rods, and vertical and horizontal walls connected rod elements in the alignment of their attachment to the feathers of the connecting corners are reinforced from the inside diaphragms arranged parallel to the end caps.
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
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
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.
FIELD: building, particularly to produce light building structures, namely in building site.
SUBSTANCE: connection includes ends of members to be connected, tightening bolts with washers. Conical depression and conical boss are formed in washer surfaces facing each other. When nut is tightened on tightening bolt the members are jammed in conical cavity between the washers.
EFFECT: increased load-bearing capacity of the connection.
3 cl, 3 dwg
FIELD: building, particularly to create rod structures of pipes.
SUBSTANCE: butt-joint comprises tubular rod ends, ribs and tightening bolts. The ribs are inserted in cuts made in tubular rods and connected one to another in crossing areas along the full length thereof. Flanges are spaced from tubular rod ends.
EFFECT: reduced flange mass.
2 cl, 4 dwg
FIELD: building, particularly to connect arch members during movable building erection.
SUBSTANCE: joint connection comprises arch member ends with fastening members fixedly connected to arch member ends, cylindrical joint insert with two side covering members connected thereto and tightening bolts. The fastening members are made as pipe cuts. The side covering members are provided with coaxial orifices arranged along a circle. Fastening members pass through the coaxial orifices.
EFFECT: simplified production and increased accuracy of joint connection assemblage.
FIELD: building, particularly to connect rod members of building structure with triangular three-layered roof deck panels.
SUBSTANCE: joint connection comprises three-dimensional hollow member to connect rods of triangular grid. The hollow member is solid and defines hexagon. The hollow member has one truncated end. The hollow member comprises support panel made as round plate with U-shaped spaced apart clips fixedly connected to plate along plate perimeter. The clips are adapted for deck panels connection. Triangular three-layered panels are overlapped and connected one to another. Mounting covering strips are connected to ends of all panels so that one strip end is flush with upper rib surface, another strip end is inserted in U-shaped clip.
EFFECT: increased load-bearing capacity of the structure.
FIELD: building, particularly means to reinforce timber structures along with member connection on head block.
SUBSTANCE: reinforcement unit comprises compressed rod, belt and reinforcing side covering plates. The plates are made of angle bars and provided with transversal diaphragms. Side covering plates enclose belt section corners and pass through slots made in compressed rod.
EFFECT: increased load-bearing capacity, prevention of head block unit deformation and shearing.
SUBSTANCE: pipe junction comprises ends of pipes that are set one in the other, face plug, slots made in the pipe of greater diameter, and connecting member secured to the pipes by welding. The connecting member is made of a ring member mounted at the end of the pipe of smaller diameter, and the slots in the pipe of greater diameter do not reach the end of the pipe.
EFFECT: enhanced strength and simplified manufacturing of the joint.
FIELD: metal truss building, particularly to erect bridge span structures.
SUBSTANCE: joint includes a number of segments and connection pipes. The joint is formed as two stamped halves connected with each other by welds to form cylindrical connection pipes provided with flanges. The flanges are welded to the connection pipe ends.
EFFECT: improved manufacturability and operational reliability.