UT type semi-rigid assembled joint and assembling method thereof

Abstract

The application relates to a UT type semi-rigid assembled node and an assembling method thereof, and particularly relates to the technical field of assembled steel structures. The application is used for solving the problems of high construction difficulty, low construction efficiency and low economic benefits of the existing steel structure assembled node. The application comprises a rear end plate, a front end plate, a connecting end plate, a lower connecting plate, upper connecting bolts, an upper connecting assembly, a lower connecting assembly, two side end plates and lower connecting bolts, the upper part between the front end plate and the rear end plate is fixedly connected through the upper connecting assembly, the shape of the upper connecting assembly is a 'N' character, the lower part between the front end plate and the rear end plate is fixedly connected through the lower connecting assembly, the shape of the lower connecting assembly is an inverted 'T' character, the lower connecting plate is horizontally fixedly connected to the outer side of the lower end of the connecting end plate, the upper part of the front end plate is fixedly connected to the outer side end surface of the connecting end plate through the upper connecting bolts, and the lower connecting assembly is fixedly connected to the upper end surface of the lower connecting plate through the lower connecting bolts. The application is used for building connection.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fabricated steel structure, in particular to a UT type semi-rigid fabricated joint and an assembling method thereof. BACKGROUND

[0002] The fabricated steel structure has the advantages of short construction period, high construction safety, low construction labor demand, lightweight structure, modularity, easy disassembly and recycling, etc., can reduce construction waste and improve the ecological environmental benefits of construction engineering, is a green building in the whole life cycle, and meets the strategic requirements of sustainable industrial development. This structure has gradually become an important form of buildings in developed countries such as Europe, and will also become one of the main forms of building development in China in the future. For the fabricated steel structure, the mechanical properties of the joint and the construction feasibility are particularly important. The conventional steel structure connecting joints at home and abroad have the following disadvantages:

[0003] 1. For the full-welded joint of the flange web and the bolt-welded mixed connecting joint, this kind of joint needs to be welded on site, the welding quality is difficult to guarantee, the technical requirements for the welders are high, and the welding quality detection process needs to be added, which seriously affects the construction speed, and the welding residual stress and residual strain are uncontrollable.

[0004] 2. At present, the number of bolts of the full bolt joint of the most fabricated beam-column connecting and beam-beam splicing joints in China is too large, the construction efficiency is not obviously improved, and the economic benefits are not high.

[0005] 3. The construction difficulty exists in the actual application when the construction error problem is not considered in the design of some new type of steel structure fabricated joints at home and abroad at present. SUMMARY

[0006] The present application is to solve the problems of high construction difficulty, low construction efficiency and low economic benefits of the existing steel structure fabricated joint, and further proposes a UT type semi-rigid fabricated joint and an assembling method thereof.

[0007] The technical solution adopted by the present application to solve the above technical problems is:

[0008] The UT type semi-rigid assembled node comprises a rear end plate, a front end plate, a connecting end plate, a lower connecting plate, an upper connecting bolt, an upper connecting assembly, a lower connecting assembly, two side end plates and a lower connecting bolt, the rear end plate is connected with the beam end of a steel beam, the front end plate is arranged on the outer side of the rear end plate in parallel, the upper part between the front end plate and the rear end plate is fixedly connected through the upper connecting assembly, the shape of the upper connecting assembly is a "N" character, the lower part between the front end plate and the rear end plate is fixedly connected through the lower connecting assembly, the shape of the lower connecting assembly is an inverted "T" character, the connecting end plate is vertically connected with the connecting part of another connecting piece, the lower connecting plate is horizontally fixedly connected on the outer side of the lower end of the connecting end plate, the upper part of the front end plate is fixedly connected with the outer side end face of the connecting end plate through the upper connecting bolt, and the lower connecting assembly is fixedly connected with the upper end face of the lower connecting plate through the lower connecting bolt.

[0009] Further, the upper connecting assembly comprises an intermediate connecting plate and two side end plates, the intermediate connecting plate is horizontally arranged in the middle part between the front end plate and the rear end plate, one end of the intermediate connecting plate is fixedly connected with the outer side end face of the rear end plate, the other end of the intermediate connecting plate is fixedly connected with the inner side end face of the front end plate, and the side end plates are vertically arranged on both sides of the upper part between the front end plate and the rear end plate, one end of the side end plate is fixedly connected with the outer side end face of the rear end plate, the other end of the side end plate is fixedly connected with the inner side end face of the front end plate, and the lower end of the side end plate is fixedly connected with the upper end face of the intermediate connecting plate.

[0010] Further, the lower connecting assembly comprises a lower web plate and a bottom end plate, the lower web plate is vertically arranged at the middle position of the lower part between the front end plate and the rear end plate, one end of the lower web plate is fixedly connected with the outer side end face of the rear end plate, the other end of the lower web plate is fixedly connected with the inner side end face of the front end plate, the bottom end plate is horizontally arranged in the lower part between the front end plate and the rear end plate, one end of the bottom end plate is fixedly connected with the outer side end face of the rear end plate, the other end of the bottom end plate is fixedly connected with the inner side end face of the front end plate, and the middle part of the upper end face of the bottom end plate is fixedly connected with the lower end of the lower web plate.

[0011] Further, two stiffening ribs are respectively arranged on both sides of the lower end face of the lower connecting plate.

[0012] Further, the bottom end plate is provided with a lower connecting bolt hole on each side, the lower connecting plate is provided with a lower bolt hole on each side, each lower bolt hole is arranged corresponding to a lower connecting bolt hole, and the lower connecting bolt is arranged in the lower connecting bolt hole and the corresponding lower bolt hole.

[0013] The upper part of the front end plate is provided with an upper connecting bolt hole, the upper part of the connecting end plate is provided with an upper bolt hole, the upper bolt hole is arranged corresponding to the upper connecting bolt hole, and the upper connecting bolt is arranged in the upper connecting bolt hole and the upper bolt hole.

[0014] Further, the upper connecting bolt hole is internally provided with an internal thread, and the end of the upper connecting bolt is threadedly connected with the upper threaded hole.

[0015] Further, the upper threaded hole is internally a light hole, and a sleeve is vertically fixed on the inner end surface of the connecting end plate, the sleeve is coaxially arranged with the upper threaded hole, the internal thread is arranged in the sleeve, and the end of the upper connecting bolt is threadedly connected with the inner wall of the sleeve after passing through the upper threaded hole.

[0016] Further, the upper threaded hole is internally a light hole, and a sleeve is vertically fixed on the inner end surface of the connecting end plate, the sleeve is coaxially arranged with the upper threaded hole, the internal thread is arranged in the sleeve, and the end of the upper connecting bolt is threadedly connected with the inner wall of the sleeve after passing through the upper threaded hole.

[0017] Further, the outer wall of the sleeve is vertically fixed with a sleeve stiffening rib.

[0018] A method for assembling a UT type semi-rigid assembly type joint comprises the following steps:

[0019] Step one, processing the plate: according to the size of the connecting piece, the rear end plate, the front end plate, the intermediate connecting plate, the lower web plate, the bottom end plate, the connecting end plate and the lower connecting plate are pre-processed, and the upper connecting bolt hole, the lower connecting bolt hole, the upper threaded hole and the lower threaded hole are processed.

[0020] The rear end plate and the side end plate, the intermediate connecting plate, the lower web plate and the bottom end plate are fixed between each other, the front end plate and the side end plate, the intermediate connecting plate, the lower web plate and the bottom end plate are fixed between each other, the intermediate connecting plate and the side end plate and the lower web plate are fixed between each other, and the lower web plate and the bottom end plate are fixed between each other, the connecting end plate and the lower connecting plate are fixed between each other, and the rear end plate and the beam end of the steel beam are fixed.

[0021] Step two, on-site installation: the bottom end plate is arranged on the upper end surface of the lower connecting plate, the outer end surface of the front end plate is tightly attached to the outer side end surface of the connecting end plate, the lower connecting bolt is first installed in the lower connecting bolt hole and the corresponding lower threaded hole, and then the upper connecting bolt is installed in the upper connecting bolt hole and the corresponding upper threaded hole.

[0022] Compared with the prior art, the present application has the following beneficial effects:

[0023] 1. The construction error can be adjusted, and for beam-column connection and space structure connection, the construction error can be corrected by screwing the adjusting sleeve, thereby ensuring the construction feasibility.

[0024] 2. The number of bolts is only 20%-30% of the full bolted node, which improves the construction speed and the economy of the node.

[0025] 3. The structure is simple and easy to be prefabricated in the factory. The standardization and industrialization of component production can be realized by changing the node size corresponding to different bar sections.

[0026] 4. The form of full bolted connection on site does not need professional welding construction personnel, which meets the development strategy of green construction and energy saving and carbon reduction at the present stage, and the damaged components after the earthquake are easy to replace, and the repair speed after the earthquake is faster.

[0027] 5. Wide application range, the node can be applied to beam-column connection, spatial structure node connection and beam-beam splicing.

[0028] 6. Reasonable stress performance, the limit moment of the node domain is 80%-90% of the limit moment of the beam (beam-column connection) or spatial bar (spatial structure connection), so that the plastic hinge is controlled in the node domain area, so that the node has good seismic energy dissipation capacity. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is a node part structure schematic view of the beam end of the steel beam 19 in the application;

[0030] Figure 2 is Figure 1 the right view of the node;

[0031] Figure 3 is a node part structure schematic view of the connecting part of another connecting piece in the application when the beam-beam is connected;

[0032] Figure 4 is a schematic view of the whole structure of the application when the beam-beam is connected;

[0033] Figure 5 is a sectional view of the whole structure of the application when the beam-beam is connected, and the inner part of the upper bolt hole 6-1 is a light hole;

[0034] Figure 6 is a node part sectional view of the connecting part of another connecting piece in the application when the beam-beam is connected, and the inner part of the upper bolt hole 6-1 is provided with an internal thread;

[0035] Figure 7 is a node part structure schematic view of the connecting part of another connecting piece in the application when the beam-column is connected;

[0036] Figure 8 is a schematic view of the whole structure of the application when the beam-column is connected;

[0037] Figure 9is the schematic diagram of the node part structure of the connecting part of another connecting member in the application when the spatial structure is connected;

[0038] Figure 10 is the schematic diagram of the overall structure of the application when the spatial structure is connected;

[0039] Figure 11 is the finite element analysis result of the node of the application;

[0040] Figure 12 is the bending moment rotation angle curve of the node of the application;

[0041] Figure 13 is the bending moment and axial force / pre-tightening force curve of the node of the application. DETAILED DESCRIPTION

[0042] Specific implementation one: combined Figures 1 to 13 In this embodiment, the UT type semi-rigid assembly type node includes a rear end plate 1, a front end plate 2, a connecting end plate 6, a lower connecting plate 7, an upper connecting bolt 8, an upper connecting assembly, a lower connecting assembly, two side end plates 9 and a lower connecting bolt 10. The rear end plate 1 is connected with the beam end of a steel beam 19. The front end plate 2 is arranged parallel to the outside of the rear end plate 1. The upper part between the front end plate 2 and the rear end plate 1 is fixedly connected through the upper connecting assembly. The shape of the upper connecting assembly is a “N” shape. The lower part between the front end plate 2 and the rear end plate 1 is fixedly connected through the lower connecting assembly. The shape of the lower connecting assembly is an inverted “T” shape. The connecting end plate 6 is connected vertically with the connecting part of another connecting member. The lower connecting plate 7 is fixedly connected horizontally with the outside of the lower end of the connecting end plate 6. The upper part of the front end plate 2 is fixedly connected with the outer side end surface of the connecting end plate 6 through the upper connecting bolt 8. The lower connecting assembly is fixedly connected with the upper end surface of the lower connecting plate 7 through the lower connecting bolt 10.

[0043] The UT type semi-rigid assembly type node can be applied to beam-beam connection, beam-column connection and spatial structure connection.

[0044] When used for beam-beam connection, the rear end plate 1 is fixedly connected vertically with the connecting part of one beam. The connecting end plate 6 is fixedly connected vertically with the connecting part of another beam.

[0045] When used for beam-column connection, the rear end plate 1 is fixedly connected vertically with the connecting part of a beam. The connecting end plate 6 is fixedly connected vertically with the connecting part of a steel column. The vertical side wall of the steel column itself can be used instead of the connecting end plate 6, that is, the lower connecting plate 7 is fixedly connected horizontally with the outer side wall of the steel column. The upper part of the front end plate 2 is fixedly connected directly with the outer side end surface of the steel column through the upper connecting bolt 8.

[0046] When used for connecting space structures, the rear end plate 1 is vertically fixed to the connecting part of the beam, the connecting end plate 6 is vertically fixed to the connecting part of the polygonal connecting column, or the vertical side wall of the polygonal connecting column can be used instead of the connecting end plate 6, that is, the lower connecting plate 7 is horizontally fixed to the outer side wall of the polygonal connecting column, and the upper part of the front end plate 2 is directly fixed to the outer side end face of the polygonal connecting column through the upper connecting bolt 8.

[0047] The lower connecting bolt 10 is two or more.

[0048] Specific implementation method two: combination Figures 1 to 13 In this embodiment, the upper connecting assembly includes the middle connecting plate 3 and the two side end plates 9. The middle connecting plate 3 is horizontally arranged at the middle part between the front end plate 2 and the rear end plate 1, one end of the middle connecting plate 3 is fixed to the outer side end face of the rear end plate 1, the other end of the middle connecting plate 3 is fixed to the inner side end face of the front end plate 2, the side end plate 9 is vertically arranged at the two sides of the upper part between the front end plate 2 and the rear end plate 1, one end of the side end plate 9 is fixed to the outer side end face of the rear end plate 1, the other end of the side end plate 9 is fixed to the inner side end face of the front end plate 2, and the lower end of the side end plate 9 is fixed to the upper end face of the middle connecting plate 3. The technical features not disclosed in this embodiment are the same as those in the specific implementation method one.

[0049] Specific implementation method three: combination Figures 1 to 13 In this embodiment, the lower connecting assembly includes the lower web plate 4 and the bottom end plate 5. The lower web plate 4 is vertically arranged at the middle position of the lower part between the front end plate 2 and the rear end plate 1, one end of the lower web plate 4 is fixed to the outer side end face of the rear end plate 1, the other end of the lower web plate 4 is fixed to the inner side end face of the front end plate 2, the bottom end plate 5 is horizontally arranged at the lower part between the front end plate 2 and the rear end plate 1, one end of the bottom end plate 5 is fixed to the outer side end face of the rear end plate 1, the other end of the bottom end plate 5 is fixed to the inner side end face of the front end plate 2, and the middle part of the upper end face of the bottom end plate 5 is fixed to the lower end of the lower web plate 4. The technical features not disclosed in this embodiment are the same as those in the specific implementation method two.

[0050] Specific implementation method four: combination Figures 1 to 13 In this embodiment, the lower end face of the lower connecting plate 7 is provided with one stiffening rib 11 on each side. The technical features not disclosed in this embodiment are the same as those in the specific implementation method three.

[0051] When used for connecting beams, the upper end of the stiffening rib 11 is vertically fixed to the lower end face of the lower connecting plate 7, the rear side of the stiffening rib 11 extends to the rear side of the connecting end plate 6, and the lower end of the connecting part of another beam is fixed;

[0052] When used for beam-column connection and space structure connection, the upper end of the stiffening rib 11 is vertically fixed to the two sides of the lower end surface of the lower connecting plate 7, and the rear end surface of the stiffening rib 11 is fixed to the front end surface of the connecting end plate 6;

[0053] Specific embodiment five: combination Figures 1 to 13 In this embodiment, the lower connecting plate 7 is provided with a lower connecting bolt hole 7-1 on each side, and the bottom end plate 5 is provided with a lower connecting bolt hole 5-1 on each side. The lower connecting bolt 10 is arranged in the lower connecting bolt hole 5-1 and the corresponding lower bolt hole 7-1.

[0054] The upper part of the front end plate 2 is provided with an upper connecting bolt hole 2-1, and the upper part of the connecting end plate 6 is provided with an upper bolt hole 6-1. The upper bolt hole 6-1 is arranged corresponding to the upper connecting bolt hole 2-1, and the upper connecting bolt 8 is arranged in the upper connecting bolt hole 2-1 and the upper bolt hole 6-1. The technical features not disclosed in this embodiment are the same as those in specific embodiment three.

[0055] The nut of the upper connecting bolt 8 is arranged on the inner side end surface of the front end plate 2, and an upper gasket 15 is arranged between the nut and the inner side end surface of the front end plate 2.

[0056] The nut of the lower connecting bolt 10 is arranged on the upper end surface of the bottom end plate 5, and a nut 16 is arranged at the end of the lower connecting bolt 10. The nut 16 is arranged on the lower end surface of the lower connecting plate 7. The lower gasket 17 is arranged between the nut of the lower connecting bolt 10 and the bottom end plate 5, and between the nut 16 and the lower connecting plate 7.

[0057] Specific embodiment six: combination Figures 1 to 13 In this embodiment, an adjusting sleeve 14 is arranged in the upper connecting bolt hole 2-1. The outer side wall of the adjusting sleeve 14 is threadedly connected to the inner side wall of the upper connecting bolt hole 2-1. The outer side end of the adjusting sleeve 14 abuts against the outer surface of the connecting end plate 6 (or a steel column or a polygonal connecting column), and the upper connecting bolt 8 is arranged in the adjusting sleeve 14. The construction error is adjusted by this connection mode.

[0058] When used for beam-column connection and space structure connection, the adjusting sleeve 14 is arranged in the upper connecting bolt hole 2-1. The outer side wall of the adjusting sleeve 14 is threadedly connected to the inner side wall of the upper connecting bolt hole 2-1. The outer side end of the adjusting sleeve 14 abuts against the outer surface of the connecting end plate 6 (or a steel column or a polygonal connecting column), and the upper connecting bolt 8 is arranged in the adjusting sleeve 14. The construction error is adjusted by this connection mode.

[0059] Specific implementation seven: combination Figures 1 to 13 In this embodiment, the inner part of the upper bolt hole 6-1 is provided with an internal thread, the end of the upper connecting bolt 8 is screwed into the upper threaded hole 6-1, and the inner side end face of the connecting end plate 6 is horizontally fixed with a sealing plate stiffening rib 18, which is arranged on the lower side of the upper bolt hole 6-1. The technical features not disclosed in this embodiment are the same as those in specific implementation five.

[0060] When used for beam connection or when used for space structure connection, the inner part of the upper bolt hole 6-1 is provided with an internal thread, and the end of the upper connecting bolt 8 is screwed into the upper threaded hole 6-1.

[0061] When used for beam connection or when used for space structure connection, the inner side end face of the connecting end plate 6 is horizontally fixed with a sealing plate stiffening rib 18, which is arranged on the lower side of the upper bolt hole 6-1, and the two sides of the sealing plate stiffening rib 18 are fixed with the side wall of the other beam.

[0062] Specific implementation eight: combination Figures 1 to 13 In this embodiment, the inner part of the upper bolt hole 6-1 is a smooth hole, the inner side end face of the connecting end plate 6 is vertically fixed with a sleeve 12, the sleeve 12 is coaxially arranged with the upper bolt hole 6-1, the inner part of the sleeve 12 is provided with an internal thread, and the end of the upper connecting bolt 8 is screwed into the inner side wall of the sleeve 12 after passing through the upper bolt hole 6-1. The technical features not disclosed in this embodiment are the same as those in specific implementation five.

[0063] When used for beam connection or when used for beam-column connection, the inner part of the upper bolt hole 6-1 is a smooth hole, the inner side end face of the connecting end plate 6 is vertically fixed with a sleeve 12, the sleeve 12 is coaxially arranged with the upper bolt hole 6-1, the inner part of the sleeve 12 is provided with an internal thread, and the end of the upper connecting bolt 8 is screwed into the inner side wall of the sleeve 12 after passing through the upper bolt hole 6-1.

[0064] Specific implementation nine: combination Figures 1 to 13 In this embodiment, the outer side wall of the sleeve 12 is vertically fixed with a sleeve stiffening rib 13. The technical features not disclosed in this embodiment are the same as those in specific implementation eight.

[0065] When used for beam connection, the outer side wall of the sleeve 12 is vertically fixed with a sleeve stiffening rib 13, which is fixed between the side wall of the other beam.

[0066] Specific implementation ten: combination Figures 1 to 13 In this embodiment, the assembling method of a UT type semi-rigid assembled node comprises the following steps:

[0067] Step one, processing plate parts: according to the size of the connecting parts, pre-process the rear end plate 1, the front end plate 2, the middle connecting plate 3, the lower web plate 4, the bottom end plate 5, the connecting end plate 6 and the lower connecting plate 7, and process the upper connecting bolt hole 2-1, the lower connecting bolt hole 5-1, the upper bolt hole 6-1 and the lower bolt hole 7-1;

[0068] The rear end plate 1 is fixedly connected between the side end plate 9, the middle connecting plate 3, the lower web plate 4 and the bottom end plate 5, the front end plate 2 is fixedly connected between the side end plate 9, the middle connecting plate 3, the lower web plate 4 and the bottom end plate 5, the middle connecting plate 3 is fixedly connected between the side end plate 9 and the lower web plate 4, and the lower web plate 4 is fixedly connected between the bottom end plate 5, the connecting end plate 6 is fixedly connected with the lower connecting plate 7, and the rear end plate 1 is fixedly connected with the beam end of the steel beam 19;

[0069] Step two, site installation: the bottom end plate 5 is arranged on the upper end surface of the lower connecting plate 7, the outer end surface of the front end plate 2 is tightly attached to the outer side end surface of the connecting end plate 6, the lower connecting bolt 10 is first installed in the lower connecting bolt hole 5-1 and the corresponding lower bolt hole 7-1, and then the upper connecting bolt 8 is installed in the upper connecting bolt hole 2-1 and the corresponding upper bolt hole 6-1.

[0070] In the step two, when used for beam-column connection and space structure connection, the adjusting sleeve 14 is inserted into the upper connecting bolt hole 2-1, the outer side wall of the adjusting sleeve 14 is threadedly connected with the inner side wall of the upper connecting bolt hole 2-1, the outer side end of the adjusting sleeve 14 abuts against the outer surface of the connecting end plate 6 (or a steel column or a polygonal connecting column), and the upper connecting bolt 8 is inserted into the adjusting sleeve 14.

[0071] In the step one, when used for beam-beam connection or when used for space structure connection, the inner part of the upper bolt hole 6-1 is provided with internal threads, and the end of the upper connecting bolt 8 is threadedly connected with the upper threaded hole 6-1 during site installation.

[0072] When used for beam-beam connection or when used for space structure connection, the sealing plate stiffening rib 18 is horizontally welded and fixedly connected on the inner side end surface of the connecting end plate 6, the sealing plate stiffening rib 18 is arranged on the lower side of the upper bolt hole 6-1, and the two sides of the sealing plate stiffening rib 18 are welded and fixedly connected with the side walls of another beam.

[0073] In the step one, when used for beam-beam connection or when used for beam-column connection, the inner part of the upper bolt hole 6-1 is a light hole, the sleeve 12 is vertically fixedly connected on the inner side end surface of the connecting end plate 6, the sleeve 12 is coaxially arranged with the upper bolt hole 6-1, the inner part of the sleeve 12 is provided with internal threads, and the end of the upper connecting bolt 8 is threadedly connected with the inner side wall of the sleeve 12 after passing through the upper bolt hole 6-1.

[0074] The rear end plate 1 is fixedly connected with the side end plate 9, the middle connecting plate 3, the lower web plate 4 and the bottom end plate 5 by means of butt welding, the front end plate 2 is fixedly connected with the side end plate 9, the middle connecting plate 3, the lower web plate 4 and the bottom end plate 5 by means of butt welding, the middle connecting plate 3 is fixedly connected with the side end plate 9 and the lower web plate 4 by means of butt welding, and the lower web plate 4 is fixedly connected with the bottom end plate 5 by means of butt welding.

[0075] When used for beam connection, the sleeve 12 is fixedly connected with the sleeve stiffening rib 13 by means of fillet welding, the sleeve stiffening rib 13 is fixedly connected with the side wall of another beam by means of fillet welding, the connecting end plate 6 is fixedly connected with the connecting part of another beam by means of bevel butt welding, the lower connecting plate 7 is fixedly connected with the connecting end plate 6 by means of butt welding, and the stiffening rib 11 is fixedly connected with the lower connecting plate 7, the connecting end plate 6 and the connecting part of another beam by means of butt welding.

[0076] When used for beam-column connection, the rear ends of the sleeve 12 are fixedly connected by means of intersecting welding, the sleeve 12 is fixedly connected with the connecting end plate 6 (or a steel column or a polygonal connecting column) by means of fillet welding, the lower connecting plate 7 is fixedly connected with the connecting end plate 6 by means of butt welding, and the stiffening rib 11 is fixedly connected with the lower connecting plate 7 and the connecting end plate 6 by means of butt welding.

[0077] When used for space structure connection, the lower connecting plate 7 is fixedly connected with the connecting end plate 6 by means of butt welding, and the stiffening rib 11 is fixedly connected with the lower connecting plate 7 and the connecting end plate 6 by means of butt welding.

[0078] In addition, the fabricated node can also be produced by pouring or 3D printing.

[0079] UT node numerical simulation method:

[0080] (1) By calculating the bending stiffness of the node and the ultimate bearing capacity of the node, it is ensured that the node enters yield before the beam section, and the neutral axis of the node is located at 1 / 2 of the node as much as possible, so that the node can form a through plastic hinge when bearing positive and negative bending moments, and has strong energy dissipation capacity.

[0081] (2) A finite element solid model of the beam-column node is established, the element model adopts C3D8I, the connection of the screw and the bolt hole adopts General ContaUT, the rest of the connections adopt Surface-to-surface contaUT, and the implicit algorithm is used for optimization design of the node, so as to ensure that the front end plate of the node does not fail when the plastic hinge appears, and the prestressed bolt tension is less than 0.8 times the pre-tightening force. After the optimization design of the node is completed, the bending moment load is applied, and the bending moment-rotation angle curve of the node is obtained through the finite element post-processing program.

[0082] (3) Establish the finite element line unit model of the beam-column joint, adopt the conneUT connector, input the initial stiffness of the joint, apply the bending moment load to the joint, obtain the bending moment-rotation angle curve of the joint through the finite element post-processing, compare the bending moment-rotation angle curve with the bending moment-rotation angle curve of the solid element, and determine the correctness of the initial stiffness value.

[0083] (4) The finite element solid model of the beam-column joint is subjected to cyclic loading, and the energy dissipation capacity of the joint is verified by drawing the hysteresis curve and the skeleton curve of the joint.

[0084] (5) Establish two frame structures of line units, the initial stiffness value of the first frame joint is inputted and corrected, the second frame joint is rigidly connected, the same seismic load is applied to the two frame structures, and the feasibility of the UT type joint applied to the frame structure and the energy dissipation advantage are verified by observing the inter-story drift angle and the energy dissipation capacity of the frame structure under the action of the seismic load.

[0085] (6) Establish the space net shell model of the line unit, the stability of the joint is analyzed by the arc length method by setting different net shell rise-span ratios and different net shell masses, and the feasibility of the joint applied to the space structure is ensured.

[0086] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various changes and variations. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A UT type semi-rigid fabricated joint, characterized in that: It includes rear end plate (1), front end plate (2), connecting end plate (6), lower connecting plate (7), upper connecting bolt (8), upper connecting assembly, lower connecting assembly, two side end plates (9) and lower connecting bolt (10), the beam end of the rear end plate (1) is connected with the steel beam (19), the front end plate (2) is arranged on the outside of the rear end plate (1) in parallel, the upper part between the front end plate (2) and the rear end plate (1) is fixedly connected through the upper connecting assembly, the shape of the upper connecting assembly is "N" character, the lower part between the front end plate (2) and the rear end plate (1) is fixedly connected through the lower connecting assembly, the shape of the lower connecting assembly is inverted "T" character, the connecting end plate (6) is vertically connected with the connecting part of another connecting piece, the lower connecting plate (7) is horizontally fixedly connected with the outside of the lower end of the connecting end plate (6), the upper part of the front end plate (2) is fixedly connected with the outside end surface of the connecting end plate (6) through the upper connecting bolt (8), and the lower connecting assembly is fixedly connected with the upper end surface of the lower connecting plate (7) through the lower connecting bolt (10); The upper connecting assembly includes intermediate connecting plate (3) and two side end plates (9), the intermediate connecting plate (3) is arranged in the middle between the front end plate (2) and the rear end plate (1) in a horizontal manner, one end of the intermediate connecting plate (3) is fixedly connected with the outside end surface of the rear end plate (1), the other end of the intermediate connecting plate (3) is fixedly connected with the inside end surface of the front end plate (2), and the side end plate (9) is vertically arranged on both sides of the upper part between the front end plate (2) and the rear end plate (1), one end of the side end plate (9) is fixedly connected with the outside end surface of the rear end plate (1), the other end of the side end plate (9) is fixedly connected with the inside end surface of the front end plate (2), and the lower end of the side end plate (9) is fixedly connected with the upper end surface of the intermediate connecting plate (3); The lower connecting assembly includes lower web plate (4) and bottom end plate (5), the lower web plate (4) is vertically arranged at the middle position of the lower part between the front end plate (2) and the rear end plate (1), one end of the lower web plate (4) is fixedly connected with the outside end surface of the rear end plate (1), the other end of the lower web plate (4) is fixedly connected with the inside end surface of the front end plate (2), and the bottom end plate (5) is arranged in a horizontal manner at the lower part between the front end plate (2) and the rear end plate (1), one end of the bottom end plate (5) is fixedly connected with the outside end surface of the rear end plate (1), the other end of the bottom end plate (5) is fixedly connected with the inside end surface of the front end plate (2), and the middle part of the upper end surface of the bottom end plate (5) is fixedly connected with the lower end of the lower web plate (4); The bottom end plate (5) is provided with lower connecting bolt holes (5-1) on both sides, the lower connecting plate (7) is provided with lower bolt holes (7-1) on both sides, each lower bolt hole (7-1) is correspondingly arranged with one lower connecting bolt hole (5-1), and the lower connecting bolt (10) is arranged in one lower connecting bolt hole (5-1) and the corresponding lower bolt hole (7-1). The upper part of the front end plate (2) is provided with an upper connecting bolt hole (2-1), the upper part of the connecting end plate (6) is provided with an upper bolt hole (6-1), the upper bolt hole (6-1) is arranged in correspondence with the upper connecting bolt hole (2-1), and the upper connecting bolt (8) is arranged in the upper connecting bolt hole (2-1) and the upper bolt hole (6-1); The upper connecting bolt hole (2-1) is provided with an adjusting sleeve (14) inserted therein, the adjusting sleeve (14) is provided with external threads, the upper connecting bolt hole (2-1) is provided with internal threads, the outer side wall of the adjusting sleeve (14) is threadedly connected with the inner side wall of the upper connecting bolt hole (2-1), the outer side end of the adjusting sleeve (14) abuts against the outer side of the front end plate (2) and cooperates with the outer side end surface of the connecting end plate (6), the adjusting sleeve (14) is a light hole, and the upper connecting bolt (8) is inserted into the adjusting sleeve (14); The upper bolt hole (6-1) is provided with internal threads, the tail end of the upper connecting bolt (8) is threadedly connected with the upper bolt hole (6-1), and the inner side end surface of the connecting end plate (6) is horizontally fixedly connected with a sealing plate stiffening rib (18) arranged on the lower side of the upper bolt hole (6-1).

2. The UT type semi-rigid fabricated joint according to claim 1, characterized in that: The lower end surface of the lower connecting plate (7) is provided with a stiffening rib (11) on each side.

3. The UT type semi-rigid fabricated joint according to claim 1, characterized in that: The inner part of the upper bolt hole (6-1) is a light hole, the inner side end surface of the connecting end plate (6) is vertically fixedly connected with a sleeve (12) arranged on the same center line as the upper bolt hole (6-1), the inner part of the sleeve (12) is provided with internal threads, and the tail end of the upper connecting bolt (8) is threadedly connected with the inner side wall of the sleeve (12) after passing through the upper bolt hole (6-1).

4. The UT type semi-rigid fabricated joint according to claim 3, characterized in that: The outer side wall of the sleeve (12) is vertically fixedly connected with a sleeve stiffening rib (13).

5. A method of assembling a UT type semi-rigid fabricated joint, characterized in that: The method comprises the following steps: Step one, processing the plate parts: the rear end plate (1), the front end plate (2), the middle connecting plate (3), the lower web plate (4), the bottom end plate (5), the connecting end plate (6) and the lower connecting plate (7) are pre-processed according to the size of the connecting part, and the upper connecting bolt hole (2-1), the lower connecting bolt hole (5-1), the upper bolt hole (6-1) and the lower bolt hole (7-1) are processed; The rear end plate (1) and the side end plate (9), the middle connecting plate (3), the lower web plate (4) and the bottom end plate (5) are fixedly connected between each other, the front end plate (2) and the side end plate (9), the middle connecting plate (3), the lower web plate (4) and the bottom end plate (5) are fixedly connected between each other, the middle connecting plate (3) and the side end plate (9) and the lower web plate (4) are fixedly connected between each other, the lower web plate (4) and the bottom end plate (5) are fixedly connected between each other, the connecting end plate (6) and the lower connecting plate (7) are fixedly connected, and the rear end plate (1) and the beam end of the steel beam (19) are fixedly connected; Step two, on-site installation: set the bottom end plate (5) on the upper end surface of the lower connecting plate (7), and the outer end surface of the front end plate (2) is tightly attached to the outer side end surface of the connecting end plate (6). First, install the lower connecting bolt (10) in the lower connecting bolt hole (5-1) and the corresponding lower bolt hole (7-1), and then install the upper connecting bolt (8) in the upper connecting bolt hole (2-1) and the corresponding upper bolt hole (6-1).

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