Column-column connection structure based on spindle-shaped ring spring group-steel box self-resetting energy dissipation device

Abstract

The present invention discloses a column-column connection structure based on a spindle-shaped ring spring assembly-steel box self-resetting energy dissipation device, comprising: a precast reinforced concrete upper column, a precast reinforced concrete lower column, four connecting rods, four upper steel box assemblies, and four lower steel box assemblies; the upper and lower steel box assemblies are symmetrical in structure; the upper steel box assembly comprises: an upper steel box, multiple upper outer ring springs, and multiple upper inner ring springs; an upper outer ring spring is disposed between two adjacent upper inner ring springs, and the outer side walls of the upper inner ring springs contact the inner side walls of the adjacent upper outer ring springs; the connecting rod passes through the upper inner ring spring and the bottom of the upper steel box, and the connecting rod passes through the lower inner ring spring of the lower steel box assembly and the top of the lower steel box; a friction plate is further disposed between the upper and lower steel boxes. The interaction between the ring spring assembly and the connecting rod of the present invention enhances the energy dissipation capacity and self-resetting capacity of the column-column connection, achieving a higher level of structural seismic performance.

Description

Technical Field

[0001] The present invention belongs to the technical field of prefabricated concrete buildings, and in particular relates to a column-column connection structure based on a spindle-type ring spring group-steel box self-resetting energy dissipation device. Background Art

[0002] Prefabricated buildings are widely used due to their high energy efficiency, full life cycle, and effective reduction of carbon emissions. The prefabricated connection technology for horizontal components such as beams and slabs has been continuously improved. How to achieve higher assembly rate requirements for the main structure? The key to prefabricated concrete frame structures is how to achieve prefabricated connections of vertical components (columns). Column-to-column connections are often vulnerable points to damage, and the column-to-column connection surface is a weak surface with significantly reduced bearing capacity. Therefore, the safety and applicability of column-to-column connections are the key points we need to focus on.

[0003] In the existing technology, the column-column connection methods include grouting sleeve connection, welding connection and bolt connection. As far as the current status quo is concerned, the grouting sleeve connection cannot guarantee the density of the grouting in terms of technology; although the welding connection is convenient to construct, the construction quality cannot be guaranteed. The main reason is that it relies too much on the technical level of the construction workers; the bolt connection is more complicated. When the precision of ordinary connecting bolts is low, they are not suitable for shearing. When the precision is high, the processing and installation are difficult. When high-strength bolts are connected, the friction surface treatment and installation process are more complicated, the cost is high, and it is easy to loosen under the action of earthquakes, which is easy to produce weak points in the column-column connection area, and cannot effectively solve the adverse effects brought by earthquake resistance and wind resistance.

[0004] The column-to-column connections in prefabricated buildings are generally weak and easily damaged. The above-mentioned column-to-column connection method is not reliable enough and cannot effectively utilize the combined structure of grouting and steel bar connection. In addition, the above-mentioned connection method generally delays the structure from entering the plastic working stage and reduces plastic deformation by increasing the bearing capacity, and its energy consumption capacity and self-resetting ability are both weak. Summary of the Invention

[0005] In order to solve the above problems existing in the prior art, the present invention provides a column-column connection structure based on a spindle-shaped ring spring assembly and a steel box self-resetting energy dissipation device. The technical problem to be solved by the present invention is achieved through the following technical solutions:

[0006] A column-column connection structure based on a spindle-type ring spring group-steel box self-resetting energy dissipation device, comprising: a precast reinforced concrete upper column, a precast reinforced concrete lower column, four connecting rods, four upper steel box assemblies, and four lower steel box assemblies;

[0007] The upper steel box assembly and the lower steel box assembly are vertically symmetrical structures;

[0008] The upper steel box assembly includes: an upper steel box, a plurality of upper outer ring springs and a plurality of upper inner ring springs;

[0009] The upper steel box has an opening on one side and a top fixedly connected to the end of an upper column longitudinal reinforcement located at a corner outside the precast reinforced concrete upper column;

[0010] The plurality of upper inner ring springs are sequentially arranged in intervals in the upper steel box, the centers of the plurality of upper inner ring springs are located on the same straight line, and the inner ring spring at one end is arranged on the bottom of the upper steel box;

[0011] The upper outer ring spring is disposed between two adjacent upper inner ring springs, and the outer side wall of the upper inner ring spring contacts the inner side wall of the adjacent upper outer ring spring; the outer side wall of the upper inner ring spring and the inner side wall of the upper outer ring spring are both inclined surfaces;

[0012] The connecting rod passes through the upper inner ring spring and the bottom of the upper steel box, and the connecting rod passes through the lower inner ring spring of the lower steel box assembly and the top of the lower steel box; both ends of the connecting rod are fixedly connected to the lower inner ring spring and the upper inner ring spring;

[0013] A friction plate is further provided between the upper steel box and the lower steel box;

[0014] The upper steel box assembly, the friction plate, the lower steel box assembly and the connecting rod constitute a ring spring group-steel box self-resetting energy dissipation device.

[0015] In one embodiment of the present invention, the outer side wall of the upper inner ring spring includes: a first sub-outer wall and a second sub-outer wall;

[0016] The first sub-outer wall is an inclined surface extending from the first horizontal surface of the upper inner ring spring toward a center of the upper inner ring spring and facing away from the second horizontal surface of the upper inner ring spring;

[0017] The second sub-outer wall is an inclined surface extending from the second horizontal surface of the upper inner ring spring away from the center of the upper inner ring spring and facing away from the first horizontal surface of the upper inner ring spring;

[0018] An edge of the first sub-outer wall away from the center of the upper inner ring spring intersects an edge of the second sub-outer wall away from the center of the upper inner ring spring;

[0019] The inner side wall of the upper outer ring spring includes: a first sub-inner wall and a second sub-inner wall;

[0020] The first sub-inner wall is parallel to the second sub-outer wall, and the first sub-inner wall is in contact with the adjacent second sub-outer wall;

[0021] The second sub-inner wall is parallel to the first sub-outer wall, and the second sub-inner wall is in contact with the adjacent first sub-outer wall;

[0022] The minimum inner diameter and the maximum inner diameter of the plurality of upper outer ring springs increase sequentially from top to bottom;

[0023] The minimum outer diameter and the maximum outer diameter of the plurality of upper inner ring springs increase sequentially from top to bottom;

[0024] The contact area between the upper outer ring spring and the upper inner ring spring increases from top to bottom.

[0025] In one embodiment of the present invention, the friction plate is made of non-asbestos NAO material.

[0026] In one embodiment of the present invention, it further comprises four upper U-shaped connecting rods and four lower U-shaped connecting rods;

[0027] The two ends of the upper U-shaped connecting rod are welded to the outer side wall of the upper steel box;

[0028] The four upper U-shaped connecting rods are welded together;

[0029] Both ends of the lower U-shaped connecting rod are welded to the outer side wall of the lower steel box;

[0030] The four lower U-shaped connecting rods are welded to each other.

[0031] In one embodiment of the present invention, a first mounting hole and a second mounting hole are respectively provided on the top and the bottom of the upper steel box;

[0032] The first mounting hole is used to install the upper column longitudinal reinforcement;

[0033] The second mounting hole is used for mounting the connecting rod.

[0034] In one embodiment of the present invention, the upper outer ring spring and the connecting rod are both made of SMA material; and the upper inner ring spring is made of high-strength steel.

[0035] In one embodiment of the present invention, the opening of the upper steel box faces away from the center of the prefabricated reinforced concrete upper column.

[0036] Beneficial effects of the present invention:

[0037] 1. The present invention forms a ring spring assembly structure through an inner ring spring and an outer ring spring, which are placed in a steel box to form a self-resetting energy dissipation device. The superelasticity of the ring spring provides a restoring force, and the column-to-column connection is self-reset after an earthquake. Under the action of an earthquake, the upper steel box and the lower steel box will shift relative to each other, and the ring spring assembly will be compressed by force. The friction generated between the outer wall of the inner ring spring and the inner wall of the outer ring spring in multiple places of the ring spring assembly can better dissipate the earthquake energy and enhance the energy dissipation capacity. Under the action of small and medium earthquakes, it is in a first-stage energy dissipation state. At this time, the ring spring assembly structure plays an energy dissipation role. The connecting rod provides central support for the outer ring spring and the inner ring spring, which can assist the outer ring spring and the inner ring spring in self-resetting, and has both self-resetting and earthquake energy dissipation functions.

[0038] At the same time, the ring spring assembly structure is located between the end of the connecting rod and the steel box. The relatively longer connecting rod extends the stress point at the end of the connecting rod, increasing the deformation of the connecting rod. When the ring spring assembly structure reaches its ultimate compression state under the action of a major earthquake and is unable to dissipate energy, it enters the second stage of energy dissipation. Because the connecting rod can withstand greater deformation, it can still enable the column-column connection to continuously dissipate seismic energy, and it can still achieve self-reset after the earthquake, preventing damage to the upper and lower columns. Therefore, the interaction between the ring spring assembly and the connecting rod enhances the energy dissipation capacity and self-reset ability of the column-column connection, achieving a higher level of structural seismic performance.

[0039] 2. An outer ring spring and an inner ring spring are arranged in the steel box at the connection between the precast reinforced concrete upper column and the precast reinforced concrete lower column, which can not only effectively utilize the building space, but also have the effects of self-resetting and energy dissipation.

[0040] 3. The self-resetting and energy dissipation performance of the column-to-column connection structure can be changed by adjusting the wedge ratio, size, number of the ring spring assembly structure, and the size and shape of the steel box, so as to meet various seismic resistance requirements. When the spindle-shaped ring spring group is damaged under the action of a large earthquake, it can be quickly replaced and repaired after the earthquake to achieve the simultaneous recovery of the structural function and mechanical properties.

[0041] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 A schematic structural diagram of a prefabricated reinforced concrete upper column provided in an embodiment of the present invention;

[0043] Figure 2 A schematic structural diagram of a prefabricated reinforced concrete lower column provided in an embodiment of the present invention;

[0044] Figure 3 A schematic structural diagram of an upper steel box assembly and a lower steel box assembly provided in an embodiment of the present invention;

[0045] Figure 4 A schematic diagram of the cross-sectional structure of an upper inner ring spring provided in an embodiment of the present invention;

[0046] Figure 5 A schematic structural diagram of a friction plate provided in an embodiment of the present invention;

[0047] Figure 6 A schematic structural diagram of an upper steel box and an upper U-shaped connecting rod provided in an embodiment of the present invention;

[0048] Figure 7 A schematic structural diagram of an upper U-shaped connecting rod provided in an embodiment of the present invention;

[0049] Figure 8 It is a schematic diagram of the assembly structure of the column-column connection structure based on the spindle-type ring spring group-steel box self-resetting energy dissipation device.

[0050] Description of reference numerals:

[0051] 10-Precast reinforced concrete upper column; 11-Upper column longitudinal reinforcement; 12-Upper column stirrups; 13-Upper steel box assembly; 131-Upper steel box; 132-Upper outer ring spring; 133-Upper inner ring spring; 134-First sub-outer wall; 135-Second sub-outer wall; 136-First sub-inner wall; 137-Second sub-inner wall; 138-Upper U-shaped connecting rod; 139-First mounting hole; 140-Second mounting hole; 20-Precast reinforced concrete lower column; 21-Lower column longitudinal reinforcement; 22-Lower column stirrups; 23-Lower steel box assembly; 231-Lower steel box; 232-Lower outer ring spring; 233-Lower inner ring spring; 234-Lower U-shaped connecting rod; 235-Fourth mounting hole; 30-Connecting rod; 31-Nut; 40-Friction plate; 50-Lower concrete foundation DETAILED DESCRIPTION

[0052] The present invention will be further described in detail below with reference to specific examples, but the embodiments of the present invention are not limited thereto.

[0053] like Figure 1 、 Figure 2 、 Figure 3 and Figure 8 As shown, a column-column connection structure based on a spindle-type ring spring group-steel box self-resetting energy dissipation device includes: a precast reinforced concrete upper column 10, a precast reinforced concrete lower column 20, four connecting rods 30, four upper steel box assemblies 13 and four lower steel box assemblies 23.

[0054] The upper steel box assembly 13 and the lower steel box assembly 23 are vertically symmetrical. Specifically, the upper steel box assembly 13 and the lower steel box assembly 23 are axially symmetrical, with the horizontal axis of the contact surface between the upper steel box assembly 13 and the lower steel box assembly 23 as the axis. The upper steel box assembly 13 and the lower steel box assembly 23 are connected to form a column-to-column connection between the precast reinforced concrete upper column 10 and the precast reinforced concrete lower column 20.

[0055] The precast reinforced concrete upper column 10 includes a plurality of upper column longitudinal bars 11 and a plurality of upper column stirrups 12. Specifically, the upper column longitudinal bars 11 and the upper column stirrups 12 are tied together to form a column shape and then poured with concrete. A portion of the upper column longitudinal bars 11 near one end is left unconcreted, and one end of the upper column longitudinal bars 11 is located outside the precast reinforced concrete upper column 10, forming the precast reinforced concrete upper column 10.

[0056] The precast reinforced concrete lower column 20 includes a plurality of lower column longitudinal bars 21 and a plurality of lower column stirrups 22. Specifically, the lower column longitudinal bars 21 and the lower column stirrups 22 are tied together to form a column shape and then poured with concrete. A portion of the lower column longitudinal bar 21 near one end is left unconcreted, and one end of the lower column longitudinal bar 21 is located outside the precast reinforced concrete lower column 20, forming the precast reinforced concrete lower column 20.

[0057] The upper steel box assembly 13 includes an upper steel box 131 , a plurality of upper outer ring springs 132 and a plurality of upper inner ring springs 133 .

[0058] One side of the upper steel box 131 is open, and the top of the upper steel box 131 is fixedly connected to the end of an upper column longitudinal reinforcement 11 located at a corner outside the precast reinforced concrete upper column 10 .

[0059] Multiple upper inner ring springs 133 are spaced apart within the upper steel box 131, with their centers aligned on the same straight line. The multiple upper inner ring springs 133 are arranged vertically in sequence, with the upper inner ring spring 133 at one end being mounted on the bottom of the upper steel box 131. An upper outer ring spring 132 is positioned between two adjacent upper inner ring springs 133, with the outer sidewalls of the upper inner ring springs 133 contacting the inner sidewalls of the adjacent upper outer ring springs 132. The multiple upper outer ring springs 132 and the multiple upper inner ring springs 133 are alternately arranged. The outer sidewalls of the upper inner ring springs 133 and the inner sidewalls of the upper outer ring springs 132 are both inclined. Each of the four corners of the precast reinforced concrete upper column 10 has an upper column longitudinal reinforcement 11, and the end of each upper column longitudinal reinforcement 11 is connected to an upper steel box 131.

[0060] Accordingly, if Figure 2 、 Figure 3 and Figure 8 As shown, the lower steel box assembly 23 includes: a lower steel box 231, a plurality of lower outer ring springs 232 and a plurality of lower inner ring springs 233.

[0061] One side of the lower steel box 231 is open, and the bottom of the lower steel box 231 is fixedly connected to the end of a lower column longitudinal reinforcement 21 located at a corner outside the precast reinforced concrete lower column 20 .

[0062] Multiple lower inner ring springs 233 are spaced apart within the lower steel box 231, with their centers aligned on a straight line. The lower inner ring springs 233 are arranged vertically in sequence, with the lower inner ring spring 233 at one end resting on the top of the lower steel box 231. A lower outer ring spring 232 is positioned between two adjacent lower inner ring springs 233, with the outer sidewalls of the lower inner ring springs 233 contacting the inner sidewalls of the adjacent lower outer ring springs 232. The lower outer ring springs 232 and the lower inner ring springs 233 are alternately spaced. The outer sidewalls of the lower inner ring springs 233 and the inner sidewalls of the lower outer ring springs 232 are both inclined. Each of the four corners of the precast reinforced concrete lower column 20 has a lower column longitudinal reinforcement 21, with the end of each lower column longitudinal reinforcement 21 connected to a lower steel box 231.

[0063] The connecting rod 30 passes through the upper inner ring spring 133 and the bottom of the upper steel box 131. It also passes through the top of the lower steel box 231 of the lower steel box assembly 23 and the lower inner ring spring 233. The connecting rod 30's ends are fixedly connected to the lower inner ring spring 233 and the upper inner ring spring 133. The connecting rod 30 passes through the upper inner ring spring 133, the bottom of the upper steel box 131, the top of the lower steel box 231, and the lower inner ring spring 233 in sequence. Its ends are respectively fixed to the upper inner ring spring 133 at the upper end and the lower inner ring spring 233 at the lower end. Specifically, the ends of the connecting rod 30 are threadedly connected to the nut 31, which is pressed onto the inner ring spring. A friction plate 40 is also interposed between the upper and lower steel boxes 131, 231. The upper steel box assembly 13, friction plate 40, lower steel box assembly 23, and connecting rod 30 constitute a ring spring assembly-steel box self-resetting energy dissipation device.

[0064] The inner ring spring is made of high-strength steel, and the outer ring spring and the connecting rod 30 are made of SMA (shape memory alloys).

[0065] In this embodiment, the inner and outer ring springs form a ring spring assembly structure. The superelasticity of the ring springs provides a restoring force, enabling the post-column connection to self-reset after an earthquake. Under the influence of an earthquake, the upper steel box 131 and the lower steel box 231 will shift relative to each other, causing the ring spring assembly to be compressed. The friction generated between the outer sidewalls of the inner ring springs and the inner sidewalls of the outer ring springs at various locations in the ring spring assembly can better dissipate seismic energy and enhance energy dissipation capacity. Under the influence of a relatively small earthquake, the ring spring assembly structure performs an energy dissipation function during the first stage of energy dissipation. The connecting rod 30 provides central support for the outer and inner ring springs, assisting them in self-resetting, thus achieving both self-resetting and seismic energy dissipation functions.

[0066] At the same time, the ring spring assembly is located between the end of the connecting rod 30 and the steel box. The relatively longer connecting rod 30 extends the stress point at the end of the connecting rod 30, increasing its deformation. When the ring spring assembly reaches its ultimate compression state under a large earthquake and is unable to dissipate energy, it enters a second stage of energy dissipation. Because the connecting rod 30 can withstand greater deformation, it can still dissipate seismic energy at the column-to-column connection, allowing it to self-reset after the earthquake, preventing damage to the upper and lower columns. Therefore, the interaction between the ring spring assembly and the connecting rod 30 enhances the energy dissipation and self-resetting capabilities of the column-to-column connection, achieving a higher level of structural seismic performance.

[0067] It should be noted that compared to a configuration without the ring spring assembly structure, the connecting rod 30 directly connects the upper steel box 131 and the lower steel box 231, leaving no space between the end of the connecting rod 30 and the bottom of the steel box. Therefore, the length of the connecting rod 30 in this embodiment is significantly shorter than that of the connecting rod 30 in this embodiment. In this embodiment, the ring spring assembly structure provides space for the connecting rod 30, allowing the distal force point of the connecting rod 30 to be extended, thereby enhancing the self-resetting and energy dissipation capabilities of the connecting rod 30.

[0068] In this embodiment, an outer ring spring and an inner ring spring are arranged in the steel box at the connection between the precast reinforced concrete upper column 10 and the precast reinforced concrete lower column 20, which can not only effectively utilize the building space, but also have self-resetting and energy dissipation effects.

[0069] In this embodiment, the self-resetting and energy dissipation performance of the column-to-column connection structure can be changed by adjusting the wedge ratio, size, number of the ring spring assembly structure and the size and shape of the steel box, thereby meeting various seismic resistance requirements. When the spindle-shaped ring spring group is damaged under the action of a large earthquake, it can be quickly replaced and repaired after the earthquake, thereby achieving simultaneous recovery of the structure's functional use and mechanical properties.

[0070] In this embodiment, a double-box connection is realized between prefabricated reinforced concrete columns to meet the needs of actual design and construction. The assembled connecting columns have clear force transmission and high bearing capacity, are convenient to construct and simple to operate, and can continue to exert a stable energy dissipation effect under the action of earthquakes. They can also return to their original state after the earthquake and achieve self-reset.

[0071] Furthermore, if Figure 3 and Figure 4 As shown, in this embodiment, the structure is specifically described by taking the upper inner ring spring 133 and the upper outer ring spring 132 as an example. The outer side wall of the upper inner ring spring 133 includes: a first sub-outer wall 134 and a second sub-outer wall 135;

[0072] The first sub-outer wall 134 is an inclined surface extending from the first horizontal surface of the upper inner ring spring 133 toward a center away from the upper inner ring spring 133 and facing away from the second horizontal surface of the upper inner ring spring 133;

[0073] The second sub-outer wall 135 is an inclined surface extending from the second horizontal surface of the upper inner ring spring 133 toward a center away from the upper inner ring spring 133 and facing away from the first horizontal surface of the upper inner ring spring 133;

[0074] An edge of the first sub-outer wall 134 away from the center of the upper inner ring spring 133 intersects an edge of the second sub-outer wall 135 away from the center of the upper inner ring spring 133 ;

[0075] The inner side wall of the upper outer ring spring 132 includes: a first sub-inner wall 136 and a second sub-inner wall 137;

[0076] The first sub-inner wall 136 is parallel to the second sub-outer wall 135 and contacts the adjacent second sub-outer wall 135 ; the second sub-inner wall 137 is parallel to the first sub-outer wall 134 and contacts the adjacent first sub-outer wall 134 .

[0077] In this embodiment, the outer side wall of the upper inner ring spring 133 can interfere with the inner side walls of the two adjacent upper outer ring springs 132, and the upper steel box 131 and the lower steel box 231 will shift relative to each other, causing the ring spring assembly to be compressed. The friction generated between the outer side wall of the inner ring spring and the inner side wall of the outer ring spring at more positions of the ring spring assembly can better dissipate seismic energy, further enhancing the energy absorption capacity.

[0078] Preferably, the minimum and maximum inner diameters of the multiple upper outer ring springs 132 increase from top to bottom, while the maximum and minimum outer diameters of the multiple upper inner ring springs 133 increase from top to bottom. The contact area between the upper outer ring springs 132 and the upper inner ring springs 133 increases from top to bottom. The minimum and maximum inner diameters of the multiple lower outer ring springs 232 increase from bottom to top, while the maximum and minimum outer diameters of the multiple lower inner ring springs 233 increase from bottom to top. The contact area between the lower outer ring springs 232 and the lower inner ring springs 233 increases from bottom to top. The upper outer ring spring 132, the upper inner ring spring 133, the lower outer ring spring 232 and the lower inner ring spring 233 form a spindle-shaped structure. In this embodiment, the upper steel box assembly 13 and the lower steel box assembly 23 constitute a spindle-shaped ring spring group-steel box self-resetting energy dissipation device. The contact area between the inner ring spring and the outer ring spring near the connection between the upper steel box 131 and the lower steel box 231 is larger, which can better ensure that the column-column connection dissipates the earthquake energy better.

[0079] Furthermore, if Figure 3 and Figure 5As shown, the friction plate 40 is made of non-asbestos organic (NAO) material. Connecting rod 30 passes through friction plate 40. When upper steel box 131 and lower steel box 231 move relative to each other, friction between friction plate 40 and the steel boxes dissipates energy, further enhancing the energy dissipation effect. The shape of friction plate 40 matches that of the steel box.

[0080] Furthermore, if Figure 1 、 Figure 2 、 Figure 6 and Figure 7 As shown, a column-to-column connection structure based on a spindle-type ring spring group-steel box self-resetting energy dissipation device also includes four upper U-shaped connecting rods 138 and four lower U-shaped connecting rods 234; the two ends of the upper U-shaped connecting rod 138 are welded to the outer side wall of the upper steel box 131; and the four upper U-shaped connecting rods 138 are welded to each other.

[0081] Both ends of the lower U-shaped connecting rod 234 are welded to the outer side wall of the lower steel box 231 ; the four lower U-shaped connecting rods 234 are welded to each other.

[0082] In this embodiment, the U-shaped connecting rod is connected to the steel box from both sides, the upper U-shaped connecting rods 138 are fixedly connected to each other, and the lower U-shaped connecting rods 234 are fixedly connected to each other. Two connections are formed between the U-shaped connecting rod and the steel box, the force is balanced and the connection is more stable, which is convenient for centering and leveling at the construction site. The U-shaped connecting rod makes the four steel box components form a whole, which can form a system with strong bending and shear stiffness. Under the action of a large earthquake, it is ensured that the column-to-column connection part yields later than other parts of the column, thereby achieving the seismic performance goal of "strong connection and weak component".

[0083] Furthermore, if Figure 2 、 Figure 3 and Figure 6 As shown, the top and bottom of the upper steel box 131 are respectively provided with a first mounting hole 139 and a second mounting hole 140; the first mounting hole 139 is used to install the upper column longitudinal reinforcement 11; the second mounting hole 140 is used to install the connecting rod 30. The top and bottom of the lower steel box 231 are respectively provided with a third mounting hole 235; the fourth mounting hole 235 is used to install the lower column longitudinal reinforcement 21; the third mounting hole is used to install the connecting rod 30. The openings of the four upper steel boxes 131 face outward away from the center of the precast reinforced concrete upper column 10, while the openings of the four lower steel boxes 231 face outward away from the center of the precast reinforced concrete lower column 20, to facilitate the installation and fixation of the connecting rod 30.

[0084] The specific construction process of the present invention is:

[0085] (1) Preparation of spindle-shaped ring spring group-steel box self-resetting energy dissipation device

[0086] The high-strength steel upper inner ring spring 133 and the upper outer ring spring 132 are arranged in sequence in the upper steel box 131 to form an upper ring spring assembly structure (the number of the high-strength steel upper inner ring spring 133 and the upper outer ring spring 132 can be determined according to the stiffness and deformation requirements, and is not limited to the number of the present invention), and the high-strength steel lower inner ring spring 233 and the lower outer ring spring 232 are arranged in sequence in the lower steel box 231 to form a lower ring spring assembly structure. A non-asbestos (NAO) friction plate 40 is placed between the upper steel box 131 and the lower steel box 231. Finally, an SMA (shape memory alloy) connecting rod 30 is inserted into the upper ring spring assembly structure, the second mounting hole 140 of the upper steel box 131, the NAO friction plate 40, the third mounting hole of the lower steel box 231, and the lower ring spring assembly structure in sequence, and fixedly connected with a nut 31 to complete the preparation of the spindle-type ring spring group-steel box self-resetting energy dissipation device.

[0087] (2) Precast reinforced concrete lower column 20, upper column

[0088] During prefabrication, the lower column longitudinal reinforcement 21 within the prefabricated lower concrete foundation 50 is thrown out in advance, the lower column stirrups 22 are tied, and concrete is poured. The portion of the lower column longitudinal reinforcement 21 connecting to the lower steel box 231 is not poured with concrete, completing the prefabrication of the prefabricated reinforced concrete lower column 20. The upper column longitudinal reinforcement 11 is tied and connected to the upper column stirrups 12, and concrete is poured. The portion of the upper column longitudinal reinforcement 11 connecting to the upper steel box 131 is not poured with concrete, completing the prefabrication of the prefabricated reinforced concrete upper column 10.

[0089] (3) Assembling prefabricated reinforced concrete columns and spindle-shaped ring spring groups - steel box self-resetting energy dissipation devices

[0090] Place the four spindle-shaped ring spring assembly-steel box self-resetting energy dissipation devices at the four corners of the precast reinforced concrete lower column 20 at the lower column longitudinal reinforcement 21. Insert the lower column longitudinal reinforcement 21 into the fourth mounting hole 235 of the lower steel box 231 and secure it with plug welding. Weld it with the lower U-shaped connecting rod 234 at the lower steel box 231. Weld it with the upper U-shaped connecting rod 138 at the upper steel box 131. Then, hoist the precast reinforced concrete upper column 10, insert the upper column longitudinal reinforcement 11 into the first mounting hole 139 of the upper steel box 131 and secure it with plug welding. Finally, pour concrete at the upper and lower column connection sections. The precast reinforced concrete column and the spindle-shaped ring spring assembly-steel box self-resetting energy dissipation device are assembled. See the completed overall assembly diagram for details. Figure 8 .

[0091] The vertical bearing capacity of the precast reinforced concrete upper column 10 and lower column of the present invention is directly transmitted through the ring spring assembly-steel box self-resetting energy dissipation device and the concrete in its core, resulting in clear force and precise force transmission. The ring spring assembly-steel box energy dissipation device bears part of the shear force and the majority of the tensile stress under earthquake action, without creating weak points in the column body and connection surfaces. The precast reinforced concrete upper and lower columns and the ring spring assembly-steel box self-resetting energy dissipation device of the present invention can all be manufactured in a factory and directly assembled on-site. The process is simple and the requirements for construction personnel are low. It can greatly reduce on-site wet concrete work and various complex grouting processes, meet the development concept of green and environmentally friendly prefabricated buildings, have high construction efficiency, and have the dual advantages of practicality and feasibility.

[0092] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0093] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0094] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0095] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0096] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification.

[0097] The above is a further detailed description of the present invention in conjunction with specific preferred embodiments, and the specific implementation of the present invention should not be considered to be limited to these descriptions. For those skilled in the art of the present invention, without departing from the concept of the present invention, several simple deductions or substitutions can be made, which should be considered to fall within the scope of protection of the present invention.

Claims

1. A column-column connection structure based on a spindle-shaped ring spring assembly and a steel box self-resetting energy dissipation device, characterized in that: include: Precast reinforced concrete upper column (10), precast reinforced concrete lower column (20), four connecting rods (30), four upper steel box assemblies (13) and four lower steel box assemblies (23); The upper steel box assembly (13) and the lower steel box assembly (23) are vertically symmetrical structures; The upper steel box assembly (13) comprises: an upper steel box (131), a plurality of upper outer ring springs (132) and a plurality of upper inner ring springs (133); The upper steel box (131) is open on one side, and the top is fixedly connected to the end of an upper column longitudinal reinforcement (11) located at a corner outside the precast reinforced concrete upper column (10); A plurality of upper inner ring springs (133) are sequentially arranged at intervals in the upper steel box (131), the centers of the plurality of upper inner ring springs (133) are located on the same straight line, and the inner ring spring at one end is arranged on the bottom of the upper steel box (131); The upper outer ring spring (132) is arranged between two adjacent upper inner ring springs (133), and the outer side wall of the upper inner ring spring (133) contacts the inner side wall of the adjacent upper outer ring spring (132); the outer side wall of the upper inner ring spring (133) and the inner side wall of the upper outer ring spring (132) are both inclined surfaces; The outer side wall of the upper inner ring spring (133) comprises: a first sub-outer wall (134) and a second sub-outer wall (135); the first sub-outer wall (134) is an inclined surface extending from the first horizontal surface of the upper inner ring spring (133) to a direction away from the center of the upper inner ring spring (133), and facing away from the second horizontal surface of the upper inner ring spring (133); the second sub-outer wall (135) is an inclined surface extending from the second horizontal surface of the upper inner ring spring (133) to a direction away from the center of the upper inner ring spring (133), and facing away from the first horizontal surface of the upper inner ring spring (133); the edge of the first sub-outer wall (134) away from the center of the upper inner ring spring (133) intersects with the edge of the second sub-outer wall (135) away from the center of the upper inner ring spring (133); The inner side wall of the upper outer ring spring (132) includes: a first sub-inner wall (136) and a second sub-inner wall (137); the first sub-inner wall (136) is parallel to the second sub-outer wall (135), and the first sub-inner wall (136) is in contact with the adjacent second sub-outer wall (135); the second sub-inner wall (137) is parallel to the first sub-outer wall (134), and the second sub-inner wall (137) is in contact with the adjacent first sub-outer wall (134); the minimum inner diameter and the maximum inner diameter of the plurality of upper outer ring springs (132) increase from top to bottom; the minimum outer diameter and the maximum outer diameter of the plurality of upper inner ring springs (133) increase from top to bottom; the contact area between the upper outer ring spring (132) and the upper inner ring spring (133) increases from top to bottom; The connecting rod (30) passes through the upper inner ring spring (133) and the bottom of the upper steel box (131), and the connecting rod (30) passes through the lower inner ring spring (233) of the lower steel box assembly (23) and the top of the lower steel box (231); both ends of the connecting rod (30) are fixedly connected to the lower inner ring spring (233) and the upper inner ring spring (133); The upper outer ring spring (132) and the connecting rod (30) are both made of SMA material; the upper inner ring spring (133) is made of high-strength steel; A friction plate (40) is further provided between the upper steel box (131) and the lower steel box (231); The upper steel box assembly (13), the friction plate (40), the lower steel box assembly (23) and the connecting rod (30) constitute a ring spring group-steel box self-resetting energy dissipation device.

2. A column-column connection structure based on a spindle-shaped ring spring assembly-steel box self-resetting energy dissipation device according to claim 1, characterized in that: The friction plate (40) is made of non-asbestos NAO material.

3. A column-to-column connection structure based on a spindle-shaped ring spring assembly-steel box self-resetting energy dissipation device according to claim 2, characterized in that: Also included are four upper U-shaped connecting rods (138) and four lower U-shaped connecting rods (234); Both ends of the upper U-shaped connecting rod (138) are welded to the outer side wall of the upper steel box (131); The four upper U-shaped connecting rods (138) are welded together; Both ends of the lower U-shaped connecting rod (234) are welded to the outer side wall of the lower steel box (231); The four lower U-shaped connecting rods (234) are welded to each other.

4. A column-to-column connection structure based on a spindle-shaped ring spring assembly-steel box self-resetting energy dissipation device according to claim 3, characterized in that: A first mounting hole (139) and a second mounting hole (140) are respectively provided on the top and bottom of the upper steel box (131); The first mounting hole (139) is used for mounting the upper column longitudinal reinforcement (11); The second mounting hole (140) is used for mounting the connecting rod (30).

5. The column-to-column connection structure based on the spindle-shaped ring spring assembly-steel box self-resetting energy dissipation device according to claim 1 is characterized in that: The opening of the upper steel box (131) faces away from the center of the prefabricated reinforced concrete upper column (10).

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