Novel assembled rotation self-centering frictional damping joint and installation method

Abstract

The application relates to the technical field of building structures, in particular to a novel assembly type rotary self-resetting frictional damping joint and a mounting method. The joint comprises two square steel pipe columns and a steel beam, the two square steel pipe columns are mutually butted in an up-down mode, an outer sleeve for connecting the two square steel pipe columns is arranged on the outer periphery of the square steel pipe columns, the steel beam is connected with the two square steel pipe columns through the outer sleeve, and a self-resetting rotating device is arranged between the steel beam and the outer sleeve. The disc spring assembly, the single-side damping sheet, the friction sheet and the double-side damping sheet are arranged, the frictional energy dissipation and the self-resetting capability are realized, and the beam end damage repairable capability can be realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building structures, and particularly relates to a novel assembly type rotary self-resetting frictional damping node and a mounting method. BACKGROUND

[0002] China is located at the junction of the Eurasian plate and belongs to a region with frequent earthquakes. The collapse of a large number of buildings after an earthquake causes huge economic losses to society, and the post-disaster reconstruction work is complex and arduous. Prefabricated buildings have the advantages of low cost, short construction period and green environmental protection, and can realize rapid post-disaster reconstruction.

[0003] Traditional buildings mainly dissipate the energy generated by earthquakes through the elastic-plastic deformation of the main structure, and have limited seismic capacity, and building structure damage is inevitable. Now some energy dissipation devices are usually added to the building structure to enhance the seismic capacity of the structure. With the development of energy dissipation and seismic mitigation technology, many dampers have emerged, among which friction dampers are widely used due to their simple structure, low cost and obvious effect.

[0004] Chinese patent (CN202111152433.5) discloses a friction energy dissipation rotary self-resetting node device, which comprises a first connecting end, a second connecting end, a hinge ring, a hinge bolt, a rotary self-resetting mechanism, the rotary self-resetting mechanism comprises two groups of friction bottom plates, friction cover plates and disc springs; the contact surfaces of the friction bottom plates and the friction cover plates are respectively preformed with an even number of even divided positive helical surfaces along the ring direction, and the contact surfaces of the friction bottom plates and the friction cover plates are respectively arranged in concave-convex opposite manner; the patent only generates elastic deformation and friction energy dissipation under the action of pressure through the disc spring group, the friction energy dissipation is low, at the same time, once the disc spring group is damaged, the pre-tightening force between the friction bottom plate and the friction cover plate disappears, and the friction energy dissipation cannot be achieved; and only one positive helical surface is arranged between the friction bottom plate and the friction cover plate, when the friction bottom plate and the friction cover plate rotate relative to each other, the phenomenon that the protrusions suddenly move at the highest mutation surface is prone to occur, which affects the normal use of the structure. SUMMARY

[0005] The present application aims to solve the problems in the prior art and provides a novel assembly type rotary self-resetting frictional damping node and a mounting method, which improves the friction energy dissipation and avoids the phenomenon that the protrusions suddenly move at the highest mutation surface.

[0006] The application provides a novel assembled rotary self-centering frictional damping joint, which comprises two square steel pipe columns and a steel beam, the two square steel pipe columns are in butt joint with each other, an outer sleeve for connecting the two square steel pipe columns is arranged on the outer periphery of the square steel pipe columns, the steel beam is connected with the two square steel pipe columns through the outer sleeve, a self-centering rotating device is arranged between the steel beam and the outer sleeve, the self-centering rotating device comprises a first connecting plate and a second connecting plate, a double-sided damping piece is arranged on the side of the first connecting plate close to the second connecting plate, a plurality of first clamping parts are arranged on the double-sided damping piece, a friction piece is arranged on the two sides of the double-sided damping piece, a through hole is arranged on the friction piece corresponding to the first clamping part, a single-sided damping piece and a plurality of disc spring assemblies are sequentially arranged at the outer side ends of the two friction pieces, the single-sided damping piece is fixedly connected with the second connecting plate, a second clamping part is arranged on the single-sided damping piece corresponding to the first clamping part, the second clamping part is arranged through the through hole on the friction piece, and the disc spring assembly, the single-sided damping piece, the friction piece and the double-sided damping piece are connected through a connecting piece.

[0007] When the steel beam is deformed under external force, the double-sided damping piece and the single-sided damping piece in the self-centering rotating device are relatively rotated, the friction piece is arranged between the double-sided damping piece and the single-sided damping piece to dissipate energy, and the friction piece is replaceable. The disc spring assembly cooperates with the connecting piece, tightly abuts the friction piece with the double-sided damping piece and the single-sided damping piece, pre-tightens the friction piece, and fully plays the energy dissipation characteristics of the friction piece. When the double-sided damping piece and the single-sided damping piece have a rotating trend, the disc spring assembly is elastically deformed, so that the self-recovery function of the beam end deformation is ensured.

[0008] The number of the second clamping parts is consistent with that of the first clamping parts, and the damping bearing capacity between the single-sided damping piece and the double-sided damping piece is improved.

[0009] The first clamping part and the second clamping part each comprise a plurality of protruding parts and recessed parts, and the contact surfaces of the first clamping part and the second clamping part are arranged in concave-convex opposite modes. The protruding part of the first clamping part is clamped into the recessed part of the second clamping part, the protruding part of the second clamping part is clamped into the recessed part of the first clamping part, when the double-sided damping piece and the single-sided damping piece are relatively rotated, the protruding part moves relatively in the recessed part, so that the disc spring assembly is compressed, and the elastic potential energy of the disc spring assembly is further increased, and the self-centering ability of the self-centering rotating device is improved.

[0010] The first clamping parts are five in number, four of which are arranged in a circumferential array, and the other one is located at the center of the circumferential array. The five first clamping parts limit the rotation damping range, and the problem of sudden dislocation of the protruding part at the highest mutation surface does not occur. At the same time, once one of the first clamping parts is damaged, the other first clamping parts can continue to maintain normal work. The number of disc spring assemblies is five, and when one of the disc spring assemblies fails, the other disc spring assemblies can still provide pre-tightening force for the double-sided damping piece and the single-sided damping piece, ensuring normal use of the structure.

[0011] The connecting piece includes a connecting shaft and a nut matched with the connecting shaft. The connecting shaft can be a high-strength bolt, and the high-strength bolt has strong shear resistance, thereby improving the shear resistance of the self-resetting rotary device.

[0012] The self-resetting rotary device is provided with a reinforcing plate on each of the upper and lower sides, and the self-resetting rotary device, the outer sleeve and the steel beam are connected through the reinforcing plate. The reinforcing plate not only has the function of connecting the self-resetting rotary device, the outer sleeve and the steel beam, but also has the functions of buckling deformation energy dissipation and post-earthquake replaceability. Meanwhile, the reinforcing plate can also bear the bending moment caused by the beam end load.

[0013] The first connecting plate and the second connecting plate each include a first part, a second part and a third part, one end of the first part is connected with one end of the second part, and the other end of the second part is connected with one end of the third part. The extension direction of the first part is the same as that of the third part, and the extension direction of the second part is perpendicular to that of the first part. The first part and the third part are connected with the reinforcing plate respectively, the second part on the first connecting plate is connected with the double-sided damping piece, and the second part on the second connecting plate is connected with the single-sided damping piece. The first connecting plate and the second connecting plate are arranged in a U shape, thereby improving the bearing capacity of the first connecting plate and the second connecting plate to shear force and bending moment. A horizontal long slot is arranged on the second part of the second connecting plate, and the long slot can adjust the pre-tightening action and rotation characteristics of the single-sided damping piece.

[0014] A web plate is arranged between the first part and the third part. The web plate improves the bearing capacity of the first connecting plate and the second connecting plate to shear force and bending moment.

[0015] A third connecting plate is arranged on the outer sleeve corresponding to the web plate. The third connecting plate improves the stability and firmness of the connection between the outer sleeve and the self-resetting rotary device.

[0016] The application provides a novel installation method of an assembled rotary self-resetting frictional damping joint, which comprises the following steps:

[0017] S1, pretreatment, the pretreatment step comprises:

[0018] S11, welding the third connecting plate on the outer periphery of the square steel pipe column;

[0019] S12, from the reset of the rotating device pre-processing, the web and the bilateral damping piece is welded on the corresponding position of the first connecting plate, the web and the unilateral damping piece is welded on the corresponding position of the second connecting plate;

[0020] S13, from the reset of the rotating device assembly, the bilateral damping piece two sides are sequentially installed friction plate, unilateral damping piece and disc spring assembly, bilateral damping piece, friction plate, unilateral damping piece and disc spring assembly are connected through connecting piece;

[0021] S2, square steel pipe column and steel beam assembly, square steel pipe column and steel beam assembly steps include:

[0022] S21, fixed lower square steel pipe column, the outer sleeve is installed on the lower square steel pipe column, the outer sleeve top is higher than the lower square steel pipe column top, the upper square steel pipe column is inserted into the outer sleeve, and abuts with the lower square steel pipe column top;

[0023] S22, the reinforcing plate is installed on the outer sleeve respectively;

[0024] S23, install the self-resetting rotating device, the self-resetting rotating device is arranged between the two reinforcing plates, and the web on the first connecting plate is connected with the third connecting plate;

[0025] S24, install the steel beam, and the side of the steel beam close to the square steel pipe column is connected with the web on the second connecting plate;

[0026] S25, pouring concrete, pouring concrete in the assembled square steel pipe column, so that the node forms a whole.

[0027] The novel assembly type rotating self-resetting frictional damping node installation method is scientific and reasonable, shortens the construction period, and improves the assembly efficiency.

[0028] Compared with the prior art, the novel assembly type rotating self-resetting frictional damping node installation method has the following beneficial effects:

[0029] 1. The disc spring assembly, the unilateral damping piece, the friction plate and the bilateral damping piece are arranged, so that the friction energy consumption is improved, and the phenomenon that the protrusions are dislocated at the highest mutation surface is avoided.

[0030] 2. The first clamping part and the second clamping part each include a plurality of protruding parts and recessed parts, and the contact surfaces of the first clamping part and the second clamping part are arranged in a concave-convex opposite manner. The protruding parts of the first clamping part are clamped into the recessed parts of the second clamping part, the protruding parts of the second clamping part are clamped into the recessed parts of the first clamping part, and when the bilateral damping piece and the unilateral damping piece rotate relative to each other, the protruding parts move relative to each other in the recessed parts.

[0031] 3. The novel assembly type rotating self-resetting frictional damping node installation method is scientific and reasonable, shortens the construction period, and improves the assembly efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 The schematic diagram of the explosion structure of the present application;

[0033] Figure 2 The schematic diagram of the explosion structure of the self-resetting rotating device of the present application;

[0034] Figure 3 The schematic diagram of the assembly step 1 of the square steel pipe column and the steel beam of the present application;

[0035] Figure 4 The schematic diagram of the assembly step 2 of the square steel pipe column and the steel beam of the present application;

[0036] Figure 5 The schematic diagram of the assembly step 3 of the square steel pipe column and the steel beam of the present application;

[0037] Figure 6 The schematic diagram of the assembly step 4 of the square steel pipe column and the steel beam of the present application;

[0038] Figure 7 The schematic diagram of the assembly step 5 of the square steel pipe column and the steel beam of the present application;

[0039] Figure 8 The schematic diagram of the assembly step 6 of the square steel pipe column and the steel beam of the present application;

[0040] Figure 9 The schematic diagram of the assembly step 7 of the square steel pipe column and the steel beam of the present application.

[0041] In the figure: 1, square steel pipe column; 2, outer sleeve; 3, reinforcing plate; 4, high-strength bolt; 5, steel beam; 6, self-resetting rotating device; 61, first connecting plate; 62, double-sided damping piece; 63, friction piece; 64, single-sided damping piece; 65, nut; 66, disc spring assembly; 67, connecting shaft; 68, web plate; 69, second connecting plate; 610, damping piece end plate; 7, one-way bolt; 8, third connecting plate. DETAILED DESCRIPTION

[0042] The present application will be further described below in combination with examples:

[0043] Example 1

[0044] As Figures 1-2As shown, the new type of assembled rotary self-centering friction damping node comprises two square steel pipe columns 1 and a steel beam 5. The two square steel pipe columns 1 are butted to each other, and an outer sleeve 2 for connecting the two square steel pipe columns 1 is arranged on the outer periphery of the square steel pipe column 1. The steel beam 5 is connected with the two square steel pipe columns 1 through the outer sleeve 2, and the steel beam 5 is arranged in an H shape. A self-centering rotating device 6 is arranged between the steel beam 5 and the outer sleeve 2. The self-centering rotating device 6 comprises a first connecting plate 61 and a second connecting plate 69. A double-sided damping piece 62 is arranged on the side of the first connecting plate 61 close to the second connecting plate 69. A plurality of first clamping portions are arranged on the double-sided damping piece 62. A friction piece 63 is arranged on the two sides of the double-sided damping piece 62. A through hole is arranged on the friction piece 63 corresponding to the first clamping portion. A single-sided damping piece 64 and a plurality of disc spring assemblies 66 are sequentially arranged on the outer side of the two friction pieces 63. The single-sided damping piece 64 is fixedly connected with the second connecting plate 69. A second clamping portion is arranged on the single-sided damping piece 64 corresponding to the first clamping portion. The second clamping portion passes through the through hole on the friction piece 63. A hinge hole is arranged at the center of the first clamping portion and the second clamping portion, and the hinge hole is concentrically arranged with the through hole. The disc spring assembly 66, the single-sided damping piece 64, the friction piece 63 and the double-sided damping piece 62 are connected through a connecting piece. The disc spring assembly 66 can be formed by a single or multiple disc springs in series according to requirements.

[0045] Preferably, the number of second clamping portions is consistent with the number of first clamping portions. The number of disc spring assemblies 66 is consistent with the number of first clamping portions.

[0046] Preferably, the first clamping portion and the second clamping portion each comprise a plurality of protrusions and recesses, and the contact surfaces of the first clamping portion and the second clamping portion are arranged in a concave-convex opposite manner.

[0047] Preferably, the number of first clamping portions is five, of which four first clamping portions are arranged in a circumferential array, and the other first clamping portion is located at the center of the circumferential array.

[0048] Preferably, the connecting piece comprises a connecting shaft 67 and a nut 65 matched with the connecting shaft 67. The connecting shaft 67 passes through the hinge hole and the through hole to connect the disc spring assembly 66, the single-sided damping piece 64, the friction piece 63 and the double-sided damping piece 62 together.

[0049] Preferably, a reinforcing plate 3 is arranged on the upper and lower sides of the self-centering rotating device 6. The self-centering rotating device 6, the outer sleeve 2 and the steel beam 5 are connected through the reinforcing plate 3.

[0050] Preferably, both the first connecting plate 61 and the second connecting plate 69 include a first part, a second part, and a third part. One end of the first part is connected to one end of the second part, and the other end of the second part is connected to one end of the third part. The extension direction of the first part is the same as the extension direction of the third part, and the extension direction of the second part is perpendicular to the extension direction of the first part. The first part and the third part are respectively connected to the reinforcing plate 3. The double-sided damping plate 62 is fixedly connected to the second part on the first connecting plate 61. The second part on the second connecting plate 69 is connected to the single-sided damping plate 64. The side of the single-sided damping plate 64 connected to the second part is fixedly connected to the damping plate end plate 610. The single-sided damping plate 64 is detachably connected to the second part through the damping plate end plate 610.

[0051] Preferably, a web plate 68 is provided between the first part and the third part. The web plate 68 is fixedly connected to the second part.

[0052] Preferably, a third connecting plate 8 is provided on the outer sleeve 2 corresponding to the web plate 68. The shape of the third connecting plate 8 is adapted to the shape of the web plate 68.

[0053] like Figures 3-9 As shown, the novel assembled rotary self-resetting friction damping node installation method of the present invention includes the following steps:

[0054] S1. Preprocessing, the preprocessing steps include:

[0055] S11. Weld the third connecting plate 8 to the outer periphery of the square steel pipe column 1; the number of the third connecting plates 8 is consistent with the number of the self-resetting rotating devices 6, and the number of the self-resetting rotating devices 6 is consistent with the number of the steel beams 5 that need to be connected.

[0056] S12. Pre-processing of the self-resetting rotating device 6: Weld the web plate 68 and the double-sided damping plates 62 to the corresponding positions on the first connecting plate 61, and weld the web plate 68 and the two single-sided damping plates 64 to the corresponding positions on the second connecting plate 69.

[0057] S13. Assembly of the self-resetting rotating device 6: Friction plate 63, single-sided damping plate 64 and disc spring assembly 66 are installed on both sides of the double-sided damping plate 62 in sequence. The double-sided damping plate 62, friction plate 63, single-sided damping plate 64 and disc spring assembly 66 are connected by connectors.

[0058] S2. Assembly of square steel pipe column 1 and steel beam 5. The assembly steps of square steel pipe column 1 and steel beam 5 include:

[0059] S21. Fix the lower square steel pipe column 1, install the outer sleeve 2 on the lower square steel pipe column 1, with the top of the outer sleeve 2 extending above the top of the lower square steel pipe column 1, insert the upper square steel pipe column 1 into the outer sleeve 2, and abut against the top of the lower square steel pipe column 1; the lower square steel pipe column 1, the upper square steel pipe column 1, and the outer sleeve 2 are connected by one-way bolts 7 to form a whole.

[0060] S22, respectively install reinforcing plates 3 on the outer sleeve 2; the reinforcing plates 3 are connected with the outer sleeve 2 through one-way bolts 7 and high-strength bolts 4.

[0061] S23, install the self-resetting rotating device 6, the self-resetting rotating device 6 is placed between the two reinforcing plates 3, the web plate 68 on the first connecting plate 61 is connected with the third connecting plate 8 through high-strength bolts 4; the first part and the third part on the first connecting plate 61 are respectively connected with the reinforcing plates 3 through high-strength bolts 4, and the first part and the third part on the second connecting plate 69 are respectively connected with the reinforcing plates 3 through high-strength bolts 4.

[0062] S24, install the steel beam 5, and connect the side close to the square steel pipe column 1 of the steel beam 5 with the web plate 68 on the second connecting plate 69 through high-strength bolts 4; the upper and lower sides of the steel beam 5 are connected with the reinforcing plates 3 through high-strength bolts 4.

[0063] S25, pour concrete, and pour concrete in the assembled square steel pipe column 1, so that the node forms a whole.

[0064] The description of the direction and relative position relationship of the structure in the application, such as front, back, left, right, up and down, does not constitute a limitation on the application, and is only convenient for description.

Claims

1. A novel assembled rotary self-centering frictional damping joint, comprising two square steel pipe columns (1) and a steel beam (5), the two square steel pipe columns (1) being mutually butted up and down, an outer sleeve (2) being arranged on the outer periphery of the square steel pipe column (1) for connecting the two square steel pipe columns (1), and the steel beam (5) being connected with the two square steel pipe columns (1) through the outer sleeve (2), characterized in that, The self-resetting rotating device (6) is arranged between the steel beam (5) and the outer sleeve (2), and comprises a first connecting plate (61) and a second connecting plate (69). The first connecting plate (61) is provided with a double-sided damping piece (62) on one side close to the second connecting plate (69). The double-sided damping piece (62) is provided with a plurality of first clamping portions. The double-sided damping piece (62) is provided with a friction piece (63) on both sides. The friction piece (63) is provided with a through hole corresponding to the first clamping portion. The outer side ends of the two friction pieces (63) are sequentially provided with a single-sided damping piece (64) and a plurality of disc spring assemblies (66). The single-sided damping piece (64) is fixedly connected with the second connecting plate (69). The single-sided damping piece (64) is provided with a second clamping portion corresponding to the first clamping portion. The second clamping portion penetrates through the through hole of the friction piece (63). The disc spring assembly (66), the single-sided damping piece (64), the friction piece (63) and the double-sided damping piece (62) are connected through a connecting piece. The first clamping portion and the second clamping portion each comprise a plurality of protrusions and recesses. The contact surfaces of the first clamping portion and the second clamping portion are respectively arranged in a concave-convex opposite manner. The self-resetting rotating device (6) is provided with a reinforcing plate (3) on both upper and lower sides. The self-resetting rotating device (6), the outer sleeve (2) and the steel beam (5) are connected through the reinforcing plate (3).

2. The novel prefabricated RSD node according to claim 1, wherein, The number of the second clamping portions is consistent with the number of the first clamping portions.

3. The novel prefabricated RSD node according to claim 1, wherein, The number of the first clamping portions is five. Four of the first clamping portions are arranged in a circumferential array. The other first clamping portion is located at the center of the circumferential array.

4. The novel prefabricated RSD node according to claim 1, wherein, The connecting piece comprises a connecting shaft (67) and a nut (65) matched with the connecting shaft (67).

5. The novel prefabricated RSD node according to any one of claims 1-4, characterized in that, The first connecting plate (61) and the second connecting plate (69) each comprise a first part, a second part and a third part connected in sequence. The extension direction of the first part is the same as the extension direction of the third part. The extension direction of the second part is perpendicular to the extension direction of the first part. The first part and the third part are respectively connected with the reinforcing plate (3). The second part on the first connecting plate (61) is connected with the double-sided damping piece (62). The second part on the second connecting plate (69) is connected with the single-sided damping piece (64).

6. The novel prefabricated RSD node according to claim 5, wherein, A web (68) is arranged between the first part and the third part.

7. The novel prefabricated RSD node according to claim 6, wherein, A third connecting plate (8) is arranged on the outer sleeve (2) corresponding to the web (68).

8. A novel method of installing a new type of assembled RSD node according to claim 7, characterized by, The method comprises the following steps: S1, pretreatment, the pretreatment step comprises: S11, welding the third connecting plate (8) on the outer periphery of the square steel pipe column (1); S12, assembly of the self-resetting rotating device (6), welding the web (68) and the double-sided damping piece (62) on the first connecting plate (61) at corresponding positions, welding the web (68) and the single-sided damping piece (64) on the second connecting plate (69) at corresponding positions; S13, sequentially installing the friction piece (63), the single-sided damping piece (64) and the disc spring assembly (66) on both sides of the double-sided damping piece (62), and connecting the double-sided damping piece (62), the friction piece (63), the single-sided damping piece (64) and the disc spring assembly (66) through the connecting piece; S2, assembly of the square steel pipe column (1) and the steel beam (5), the assembly step comprises: S21, fix the lower square steel pipe column (1), install the outer sleeve (2) on the lower square steel pipe column (1), the top of the outer sleeve (2) is higher than the top of the lower square steel pipe column (1), insert the upper square steel pipe column (1) into the outer sleeve (2) and abut against the top of the lower square steel pipe column (1); S22, install the reinforcing plate (3) on the outer sleeve (2) respectively; S23, install the self-resetting rotating device (6), the self-resetting rotating device (6) is arranged between the two reinforcing plates (3), the web (68) on the first connecting plate (61) is connected with the third connecting plate (8); S24, install the steel beam (5), the side of the steel beam (5) close to the square steel pipe column (1) is connected with the web (68) on the second connecting plate (69); S25, pour concrete, pour concrete in the assembled square steel pipe column (1), so that the node forms a whole.

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