Flanged joint of stretched elements
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.
The invention relates to building structures, namely the means of connection of building elements with each other.
Known joint connection of the stretched elements (SU # 887748, CL EV 1/38, 1/58. Jagofarov X., Cats C. J. "Joint connection tension members." - Publ. 07.12.1981, bull. No. 45), which includes the joined elements with beveled ends, is rigidly attached to the ends of the flanges with end stops, coupling bolts.
The lack of interface is that between adjacent flanges placed stops, the dimensions of which are smaller than the dimensions of the flanges, and the flanges do not have a firm contact with each other in the area of coupling bolts that are unfavorable for the work of the flanges to bend under the action of forces from the coupling bolts.
The closest in technical essence to the proposed joint connection is a joint connection (EN 2413820 C1 IPC EV 1/58. A. C. Marutyan, I. M. Pershin, Y. I. Pavlenko. Flange connection tension members closed profile. - Publ. 10.03.2011. Bull. No. 7), including the connecting elements at the ends of which an angle of 30 degrees installed flanges, sheet gasket between the flanges, which are paired reference tables, rigidly fastened to the flanges, in the collection of mutually bumped into each other, coupling bolts.
The disadvantage of this joint are bulky reference tables (at the ora), dimensions are greater than the dimensions of the flanges themselves. This leads to increased consumption of steel with a simultaneous decrease in the reliability of the joint. The fact that a tight contact is determined in each other of the edges of the supporting tables cannot be ensured due to inaccuracies of manufacture and installation, resulting in a force on the supporting tables are transmitted with a large eccentricity, which creates an additional force - torque in the elements of the joint. And the greater the length determined in each other of the edges of the supporting tables, the greater the eccentricity, as well as torque, reduce the reliability of the joint.
The aim of the invention is to simplify the design of flanged joint tension members and increase reliability while reducing material consumption.
This goal is achieved by the fact that each flange has an aperture and focus, and when the joint Assembly every stop is a hole adjacent the flange.
The invention consists in that each flange has a rectangular hole with rounded corners, wherein the longitudinal axis of the hole and the longitudinal axis of the stop is aligned with the longitudinal axis of the flange and one of the ends of the stop and a short side of the rectangular holes are aligned with each other and with the transverse axis of the flange, thus assembled, the emphasis is in the hole with the panorama of the flange with clearance on three sides and close to the short side of the hole, combined with the transverse axis of the flange, and the flanges are connected to each other clamping bolts arranged symmetrically relative to the axis of the flange.
In Fig.1 shows an external view of the assembled joint. In Fig.2 shows a section of the assembled joint in the plane of the axis 5 of connected elements 1. In Fig.3 and 4 is shown ready for Assembly connected elements, and Fig.5 - the process of Assembly of the joint. In Fig.6 shows a General view of the flange, section 1-1 of Fig.3 and 5. In Fig.7 and 8 shows the calculation scheme of the joint, and Fig.7 shows the decomposition in the center of the joint 9 external force N on the two components of efforts, namely: pitched NCacting along the flange on the shaft 7, and the normal NHacting transversely of the flange along the axis 6 of the joint, and Fig.8 shows the distribution of components of the external forces on the elements of the joint, namely the coupling bolts - Nbon the flange - 0,5 NCand the emphasis of 0.5 NC.
The interface consists of connected elements 1 with bevelled at an angle α to the axis 5, two identical flanges 2 which are welded to the beveled ends of the connected elements 1, 3 stops welded to the flanges 2, coupling bolts 4, the fastening flanges 2 with each other.
The axis of the joint and its elements are the following: 5 - axis connected elements 1; 6 - axis joint, perpendicular to the flanges; 7 and 8 are the longitudinal and transverse axis of the flange. Axis 5, 6, 7 and 8 intersect in the center 9 of the joint.
The flange is the junction of the tension members is as follows.
The flange 2 with the stop 3 is manufactured separately from the steel sheet. Procurement for emphasis is cut from the flange than at the same time a hole of the flange. The rectangular hole of the flange and the focusing are performed with rounded corners to reduce stress concentration under load. Focus 3 is fastened to the flange 2 by welding. Thus the longitudinal axis of the hole and stops 3 are aligned with the longitudinal axis 7 of the flange 2 and the end face of the stop 3 and the short side openings are aligned with the transverse axis 8 of the flange 2 (Fig.6). Holes 10 for coupling bolts 4 are drilled.
The connecting element 1 is performed with a beveled end at an angle α to the axis 5. The flange is attached to the slanted end of the articulating element by welding.
When the joint Assembly (Fig.2, 3, 4 and 5) stops appear in the holes adjacent flanges with clearance on three sides, but on tightly to the edge of the fourth short edge of the hole, aligned with the transverse axis 8 of the flange. The flanges 2 are fastened to the clamping bolts 4 so that the flanges tightly pressed to each other. This provided favorable conditions for the work of the flanges to bend under the influence of forces from the coupling bolts, and ensure the integrity of the internal cavity of connected elements, thus excluding the corrosion of steel is connected elements inside.
The junction is symmetrical relative to the center 9 that provides vtimezone is resistant connected elements. Joint universal, suitable for all forms of cross-section of connected elements.
The interface works as follows.
External force N acting along the axis 5 of the stretched elements 1, can be transformed into the center of the joint 9 on the two components of the effort. One of them NHdirected along the axis 6 of the junction, i.e., perpendicular to the flanges, and the second NC- along the longitudinal axis 7 of the flanges (Fig.7).
The force directed along the axis 6 of the junction, is perceived by the clamping bolts 4, the number "nb" which is determined by calculation (Fig.1, 6 and 8).
Effort NCacting on the shaft 7, that is, along the flanges, half-perceived directly by the flange 2, and the other half focusing 3 and it is further transmitted to the flange 2 (Fig.8). From the flange 2 of the efforts transmitted to the beveled end of the articulating element 1 through the welded seams.
This distribution of effort NCbetween the stop and the flange due to the fact that adjacent lugs do not interact with each other and interact only with the edges of the holes adjacent flanges. Reduction efforts, acting on the stop 3, provides the following technical and economic effect:
- reduced consumption of steel in focus, and the amount of welds securing the stop to the flange;
- reduced the length of the end stops in contact with the edge of the hole of the flange and is equal to the eccentricity of the force 05N Con the stop, which significantly reduces torque on the fence and in the flange;
- feature interaction stops with flanges is that the torque in the flanges have different directions and cancel each other inside of the flanges, not turning to other elements of the joint. All this contributes to increase the reliability of the junction with the simultaneous reduction of material consumption.
Thus, the proposed flanged joint tension members has a simple structure, economical and more reliable.
Flanged joint tension members includes the connected elements with beveled ends and welded thereto flanges with rectangular lugs and round holes for the clamping bolts, characterized in that each flange has a rectangular hole with rounded corners, wherein the longitudinal axis of the hole and the longitudinal axis of the stop is aligned with the longitudinal axis of the flange and one of the ends of the stop and a short side of the rectangular holes are aligned with each other and with the transverse axis of the flange, while the assembled emphasis enters the opening in the adjacent flange with clearance on three sides and close to the short side of the hole, combined with the transverse axis of the flange, and the flanges are connected to each other clamping bolts arranged symmetrically relative to the axis of the flange.
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
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.
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.