Self-resetting concrete column box connection structure with dual-stage hybrid energy dissipation components

Abstract

This invention relates to a self-resetting concrete column-box connection structure with dual-stage hybrid energy dissipation components, comprising: a precast reinforced concrete foundation, a precast reinforced concrete lower column, a precast reinforced concrete upper column, several steel boxes, several connectors, several disc spring groups, several first-stage energy dissipation components, and several second-stage energy dissipation components. Limit pins are provided on the side surfaces of the steel boxes and connectors. The surface shape of the first-stage energy dissipation components is an arc shape with a concave center and convex ends, and several limiting grooves corresponding to the limit pins are formed on both sides of the first-stage energy dissipation components at the concave positions. Second-stage energy dissipation components are provided at both ends of the first-stage energy dissipation components. The surface shape of the second-stage energy dissipation components is an arc shape complementary to the surface in contact with the first-stage energy dissipation components. This structure overcomes the problems of single energy dissipation mode and insufficient energy dissipation of existing energy dissipation components. The energy dissipation components are connected by bolts, facilitating repair and replacement after earthquakes; the disc spring groups can greatly improve the recoverable deformation capacity of the components.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of fabricated concrete buildings, and particularly relates to a self-resetting concrete column column box type connecting structure with a double-stage hybrid energy dissipation component. BACKGROUND

[0002] With the proposal of the "double carbon" strategy of carbon peak and carbon neutrality, fabricated buildings have become an important lever for promoting the transformation and upgrading of the construction industry and high-quality development and have risen to a national strategy due to their advantages of high energy efficiency, full cycle life and effective reduction of carbon emissions. Nowadays, the prefabricated connection technology of horizontal components such as beams and slabs has been perfected, and the key to the prefabricated concrete frame structure is how to achieve prefabricated connection of vertical components (columns). The column-column connection is often a weak position where damage occurs, and the column-column connection surface is a weak surface with significantly reduced bearing capacity. Therefore, the safety and applicability of column-column connection are the focus of our attention.

[0003] The current column-column connection methods include grouting sleeve connection, welding connection and bolt connection. In terms of the current situation, the grouting sleeve connection cannot guarantee the compactness of grouting in terms of technology; the welding connection is convenient for construction, but the construction quality cannot be guaranteed, which is mainly due to excessive reliance on the skill level of construction personnel; the bolt connection is relatively complex in stress, and when the precision of ordinary connecting bolts is low, it is not suitable for shearing, and when the precision is high, the processing and installation are difficult, the processing and installation of high-strength bolt connection are relatively complex, the cost is high and it is easy to loosen under the action of earthquake, which can easily produce weak points in the column-column connection area and cannot effectively solve the adverse effects brought by seismic and wind resistance. The column-column connection of fabricated buildings is generally weak and easy to damage, the existing column-column connection methods have insufficient reliability, cannot effectively utilize the combined structure of grouting and steel bar connection, and the above connection methods generally delay the structure into the plastic working stage and reduce plastic deformation by improving the bearing capacity, and the energy dissipation capacity is often poor, which cannot meet the performance design target of structural seismic resistance.

[0004] Therefore, it is necessary to research and develop a concrete column column box type connecting structure that has clear force transmission, guaranteed sectional bearing capacity, can perform double-stage hybrid continuous energy dissipation under the action of earthquake and can realize self-resetting after earthquake. SUMMARY

[0005] In order to solve the above problems in the prior art, the application provides a self-resetting concrete column column box type connecting structure with a double-stage hybrid energy dissipation component. The technical problem to be solved by the application is solved by the following technical scheme.

[0006] The embodiment of the present application provides a self-resetting concrete column box type connecting structure with a double-stage hybrid energy dissipation component, which comprises a prefabricated reinforced concrete foundation, a prefabricated reinforced concrete lower column, a prefabricated reinforced concrete upper column, a plurality of steel boxes, a plurality of connecting pieces, a plurality of disc spring groups, a plurality of first-stage energy dissipation components and a plurality of second-stage energy dissipation components, wherein

[0007] The lower column longitudinal reinforcement of the prefabricated reinforced concrete lower column is drawn out from the prefabricated reinforced concrete foundation;

[0008] The plurality of steel boxes are connected with the lower column longitudinal reinforcement of the upper end corner of the prefabricated reinforced concrete lower column respectively, and the plurality of connecting pieces are connected with the upper column longitudinal reinforcement of the lower end corner of the prefabricated reinforced concrete upper column respectively;

[0009] The plurality of steel boxes are connected with the plurality of connecting pieces one by one through the connecting pieces, and the plurality of disc spring groups are fixed in the plurality of steel boxes one by one through the connecting pieces;

[0010] The disc spring group is a shape memory alloy disc spring group, which comprises a plurality of gaskets and a plurality of disc spring groups, the disc spring group comprises a plurality of disc spring pieces, the plurality of disc spring pieces are stacked and arranged in parallel to form the disc spring group, and the adjacent disc spring groups are separated and arranged through the gaskets to form the disc spring group in series;

[0011] The side surfaces of the steel box and the connecting piece are provided with limiting pins, the surface shape of the first-stage energy dissipation component adopts an arc surface type with a concave middle and convex two ends, limiting grooves corresponding to the limiting pins are formed in the concave positions on the two sides of the first-stage energy dissipation component, and the limiting pins and the limiting grooves are matched concave-convex to limit the first-stage energy dissipation component;

[0012] One end of the first-stage energy dissipation component is fixed on the prefabricated reinforced concrete lower column and the outer surface is provided with the second-stage energy dissipation component, and the other end is fixed on the prefabricated reinforced concrete upper column and the outer surface is provided with the second-stage energy dissipation component;

[0013] The surface shape of the second-stage energy dissipation component adopts an arc surface type complementary to the surface of the first-stage energy dissipation component.

[0014] In one embodiment of the present application, the side surface of each steel box is vertically fixed with a plurality of first U-shaped rings, and the side surface of the connecting piece is vertically fixed with a second U-shaped ring.

[0015] In one embodiment of the present application, the bottom of the steel box is provided with a first hole, and the first hole is fixedly connected with the reserved steel bar section of the lower column longitudinal reinforcement through plug welding;

[0016] The top of the connecting piece is provided with a second hole, and the second hole is fixedly connected with the reserved steel bar section of the upper column longitudinal reinforcement through plug welding.

[0017] In one embodiment of the present application, the steel box is connected with the connecting piece by bolts, and the disc spring group is fixed in the steel box by the bolts.

[0018] In one embodiment of the present application, the surface shape of the first-order energy dissipation component adopts a curved surface type, and the thickness of the first-order energy dissipation component gradually increases from the middle to the two ends and then gradually decreases.

[0019] In one embodiment of the present application, the surface of the second-order energy dissipation component adopts a curved surface complementary to the end surface of the first-order energy dissipation component, and the thickness of the second-order energy dissipation component gradually decreases from one end to the other end and then gradually increases.

[0020] In one embodiment of the present application, the end of the first-order energy dissipation component is provided with a plurality of first bolt holes, the surface of the second-order energy dissipation component is provided with a plurality of second bolt holes, and the plurality of second bolt holes correspond to the plurality of first bolt holes one by one.

[0021] The second-order energy dissipation component and the first-order energy dissipation component are fixed on the prefabricated reinforced concrete lower column and the prefabricated reinforced concrete upper column by bolts passing through the second bolt holes and the first bolt holes in sequence.

[0022] In one embodiment of the present application, a plurality of steel boxes are respectively connected with the upper column longitudinal reinforcement of the lower end corner of the prefabricated reinforced concrete upper column, and a plurality of connecting pieces are respectively connected with the lower column longitudinal reinforcement of the upper end corner of the prefabricated reinforced concrete lower column.

[0023] Compared with the prior art, the present application has the following beneficial effects:

[0024] 1. The structure of the application can be divided into two energy dissipation stages according to the displacement of the first-order energy dissipation component under the action of an earthquake. In the first-order energy dissipation stage, the upper and lower connecting surfaces of the column are repeatedly opened and closed, which drives the upper and lower movement of the first-order energy dissipation component. When the first-order energy dissipation component moves, the limiting slot on the first-order energy dissipation component is constrained by the limiting pin. Due to the structural characteristics of the two ends of the first-order energy dissipation component being convex and the middle part being concave, and the limiting slot being arranged in the concave part, the first-order energy dissipation component is weakened. In this stage, the first-order energy dissipation component will yield at the cross section of the limiting slot, dissipate seismic energy in the buckling mode, and ensure small displacement of the component during a long period of earthquake occurrence. When the earthquake continues to increase (generally in the large earthquake stage), the buckling energy dissipation of the first-order energy dissipation component fails, and the second-order energy dissipation stage (large deformation stage) is entered, and large displacement occurs. At this time, the first-order energy dissipation component and the second-order energy dissipation component frictionally dissipate energy between the mutual arc surfaces. The arc-shaped cross section better plays the energy dissipation effect. Both stages can fully develop the potential of the material to ensure stable energy dissipation under a large earthquake. Through the double-stage hybrid energy dissipation, the failure and damage of the energy dissipation component are avoided, and the damage of the main structure of the structure is avoided.

[0025] 2. In the structure of the application, the shape memory alloy (SMA) disc spring group is first arranged in parallel by stacking the disc spring pieces in the same direction to form a disc spring group, and then the disc spring group is arranged in series by adding spacers between the disc spring groups. The spacers keep the adjacent disc spring groups in stable contact during deformation. Through the arrangement of the disc spring group, the load-carrying capacity, stiffness and deformation capacity of the self-resetting disc spring pieces can be improved simultaneously, effectively solving the technical problem that the deformation capacity, load-carrying capacity and stiffness of multiple disc springs cannot be improved simultaneously when stacked in the same direction or in the opposite direction. The arrangement of the disc spring group can greatly reduce the residual deformation of the component and greatly improve the recoverable deformation capacity of the component, meeting the large deformation and recoverable performance requirements of the self-resetting component.

[0026] 3. In the structure of the application, the column-column connection is fixedly connected by a U-shaped ring to the lower steel box and the upper connecting piece, which facilitates centering and leveling on the construction site. The U-shaped ring is welded with the steel box and the connecting piece, and the formed system has strong bending and shear stiffness. Under the action of a rare earthquake, the column-column connection part yields later than other parts of the column, achieving the seismic performance goal of "strong connection and weak component".

[0027] 4. The prefabricated reinforced concrete upper column and lower column vertical bearing capacity of the application is directly transmitted through the upper connecting piece, the lower steel box and the concrete in the core thereof, the stress is clear, the force transmission is clear, the bolts bear part of the shear force, and part of the tensile stress under the action of the earthquake, the first energy dissipation component can also bear part of the bending moment and shear force, and no weak point is generated in the column body and the connecting surface.

[0028] 5. The prefabricated reinforced concrete upper column, lower column and each energy dissipation component of the application can be completed in the factory, directly assembled on site, the process is simple, the requirements for construction personnel are not high, the site concrete wet work and various complex grouting processes can be greatly reduced, the development concept of green and environmentally friendly fabricated building under the background of "double carbon" is met, the construction efficiency is high, and the fabricated building has the dual advantages of practicality and feasibility. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 A whole assembly three-dimensional drawing of the self-centering concrete column box type connecting structure with a double-stage hybrid energy dissipation component is provided for the embodiment of the application;

[0030] Figure 2 A prefabricated reinforced concrete lower column and steel box three-dimensional drawing is provided for the embodiment of the application;

[0031] Figure 3 A prefabricated reinforced concrete upper column and connecting piece three-dimensional drawing is provided for the embodiment of the application;

[0032] Figure 4 A double-stage energy dissipation-self-centering system assembly three-dimensional drawing is provided for the embodiment of the application;

[0033] Figure 5 A three-dimensional drawing of an energy dissipation component is provided for the embodiment of the application;

[0034] Figure 6 A parallel disc spring group schematic diagram is provided for the embodiment of the application;

[0035] Figure 7 A series disc spring group schematic diagram is provided for the embodiment of the application;

[0036] Figure 8 A U-shaped ring three-dimensional drawing is provided for the embodiment of the application;

[0037] Figure 9 A connecting piece and U-shaped ring connection schematic diagram is provided for the embodiment of the application. DETAILED DESCRIPTION

[0038] The application will be further described in detail below in combination with specific embodiments, but the embodiments of the application are not limited thereto.

[0039] Embodiment one

[0040] Please refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 , Figure 1 The overall assembly three-dimensional diagram of the column-box type connecting structure of the self-resetting concrete column with the double-stage hybrid energy dissipation assembly provided by the embodiment of the present application, Figure 2 The three-dimensional diagram of the prefabricated reinforced concrete lower column and the steel box provided by the embodiment of the present application, Figure 3 The three-dimensional diagram of the prefabricated reinforced concrete upper column and the connecting piece provided by the embodiment of the present application, Figure 4 The assembly three-dimensional diagram of the double-stage energy dissipation-self-resetting system provided by the embodiment of the present application, Figure 5 The three-dimensional diagram of the energy dissipation assembly provided by the embodiment of the present application.

[0041] The column-box type connecting structure in the embodiment includes a prefabricated reinforced concrete foundation 1, a prefabricated reinforced concrete lower column 2, a prefabricated reinforced concrete upper column 3, a plurality of steel boxes 4, a plurality of connecting pieces 5, a plurality of disc spring groups 6, a plurality of first-stage energy dissipation assemblies 8 and a plurality of second-stage energy dissipation assemblies 9. The lower column longitudinal reinforcement 201 of the prefabricated reinforced concrete lower column 2 is projected from the prefabricated reinforced concrete foundation 1. The plurality of steel boxes 4 are respectively connected with the lower column longitudinal reinforcement 201 at the upper end corner of the prefabricated reinforced concrete lower column 2, and the plurality of connecting pieces 5 are respectively connected with the upper column longitudinal reinforcement 301 at the lower end corner of the prefabricated reinforced concrete upper column 3. The plurality of steel boxes 4 and the plurality of connecting pieces 5 are connected one-to-one through the connecting pieces, and the plurality of disc spring groups 6 are fixed one-to-one in the plurality of steel boxes 4. The side surfaces of the steel boxes 4 and the connecting pieces 5 are respectively provided with limiting pins 7. The surface shape of the plurality of first-stage energy dissipation assemblies 8 adopts an arc surface type with a concave middle and convex ends, and a plurality of limiting grooves 10 corresponding to the limiting pins 7 are formed at the concave positions on the two sides of the first-stage energy dissipation assemblies 8. The limiting pins 7 and the limiting grooves 10 are matched concave-convexly to limit the first-stage energy dissipation assemblies 8. One end of the first-stage energy dissipation assembly 8 is fixed on the prefabricated reinforced concrete lower column 2 and the outer surface thereof is provided with the second-stage energy dissipation assembly 9, and the other end is fixed on the prefabricated reinforced concrete upper column 3 and the outer surface thereof is provided with the second-stage energy dissipation assembly 9. The surface shape of the second-stage energy dissipation assembly 9 adopts an arc surface type complementary to the surface of the first-stage energy dissipation assembly 8 in contact.

[0042] Specifically, the prefabricated reinforced concrete lower column 2 and the prefabricated reinforced concrete upper column 3 are both rectangular columns, each having 4 side surfaces and 4 corners. Therefore, the number of the steel boxes 4, the connecting pieces 5, the disc spring groups 6 and the first-stage energy dissipation assemblies 8 is 4, and the number of the second-stage energy dissipation assemblies 9 is 8.

[0043] Specifically, the bottom of the four steel boxes 4 is connected with the lower column longitudinal reinforcement 201 of the four corners of the upper end of the prefabricated reinforced concrete lower column 2 respectively, the side of the steel box 4 is provided with a steel plate and faces the prefabricated reinforced concrete lower column 2, and the outer side of the steel box 4 is not provided with a steel plate. The top of the four connecting pieces 5 is connected with the upper column longitudinal reinforcement 301 of the four corners of the lower end of the prefabricated reinforced concrete upper column 3 respectively, the side of the connecting piece 5 is provided with a steel plate and faces the prefabricated reinforced concrete upper column 3, and the outer side of the connecting piece 5 is not provided with a steel plate. The top of each steel box 4 is aligned with the bottom of each connecting piece 5 and connected by the connecting piece, and a group of disc spring groups 6 is arranged in each steel box 4 and fixed through the connecting piece.

[0044] Specifically, the two vertical sides of the steel box 4 are welded with limiting pins 7, and the limiting pins 7 extend to the surface of the prefabricated reinforced concrete lower column 2; the two vertical sides of the connecting piece 5 are provided with limiting pins 7, and the limiting pins 7 extend to the surface of the prefabricated reinforced concrete upper column 3.

[0045] Specifically, the surface of the first-order energy dissipation component 8 is concave in the middle and convex at both ends and is arc-shaped, two limiting grooves 10 are formed in the middle concave position on the two sides of the first-order energy dissipation component 8 respectively, the upper limiting groove 10 corresponds to the limiting pin 7 on the side of the steel box 4 and matches concave-convex, and the lower limiting groove 10 corresponds to the limiting pin 7 on the side of the connecting piece 5 and matches concave-convex. The limiting grooves 10 on the two sides of the first-order energy dissipation component 8 concave-convex match with the corresponding limiting pins 7 on the steel box 4 and the connecting piece 5, so as to limit the first-order energy dissipation component 8, so that one end of the first-order energy dissipation component 8 is fixed on the prefabricated reinforced concrete upper column 3, and the other end is fixed on the prefabricated reinforced concrete lower column 2. Further, the second-order energy dissipation component 9 is fixed at both ends of the first-order energy dissipation component 8, the surface of the second-order energy dissipation component 9 is arc-shaped and complementary to the arc-shaped end of the first-order energy dissipation component 8.

[0046] It should be noted that the middle concave and both ends convex of the first-order energy dissipation component 8 in the embodiment means that the thinnest part is located between the arcs at both ends, so that the thinnest part can be arranged at the maximum deformation position, that is, the connecting position of the column, to achieve the purpose of buckling energy dissipation, that is, the thinnest part can be located at the upper middle position, the middle position or the lower middle position. The arc-shaped convex at both ends can increase the friction energy dissipation between the energy dissipation components, and the specific form of the arc is not limited in the embodiment.

[0047] In addition, Figure 1 The steel box 4 in the embodiment is arranged at the column foot of the concrete column formed by the prefabricated reinforced concrete lower column 2 and the prefabricated reinforced concrete upper column 3, but the steel box 4 can also be arranged in the concrete column, and the embodiment does not make further limitation.

[0048] The structure of the embodiment can be divided into two energy dissipation stages according to the displacement of the first-order energy dissipation component under the action of an earthquake. In the first-order energy dissipation stage, i.e. the small deformation stage, the upper and lower column connecting surfaces repeatedly open and close, which drives the upper and lower movement of the first-order energy dissipation component. When the first-order energy dissipation component moves, the limiting slot on the first-order energy dissipation component is constrained by the limiting pin. Due to the structural characteristics that the two ends of the first-order energy dissipation component are convex and the middle part is concave, and the limiting slot is arranged in the middle concave part, the first-order energy dissipation component is weakened. In this stage, the first-order energy dissipation component will yield at the cross section of the limiting slot and dissipate seismic energy in the buckling mode, which can ensure that the component has a small displacement for a long time during the earthquake. When the earthquake continues to increase and is generally in the large earthquake action stage, the buckling energy dissipation of the first-order energy dissipation component fails, and the second-order energy dissipation stage, i.e. the large deformation stage, is entered, and a larger displacement occurs. At this time, the first-order energy dissipation component and the second-order energy dissipation component frictionally dissipate energy between the mutual arc surfaces. The arc-shaped cross section can better play the energy dissipation effect. Both stages can fully develop the potential of the material and ensure that the structure can still continuously and stably dissipate energy under a large earthquake. Through the double-stage hybrid energy dissipation, the failure and damage of the energy dissipation component are avoided, and the damage of the main structure of the structure is avoided.

[0049] Please refer to Figure 2 and Figure 4 , the bottom of the steel box 4 is provided with a first hole 402, and the first hole 402 is fixedly connected with the reserved reinforcing bar section of the lower column longitudinal reinforcement 201 through plug welding. Please refer to Figure 3 and Figure 4 , the top of the connecting piece 5 is provided with a second hole 502, and the second hole 502 is fixedly connected with the reserved reinforcing bar section of the upper column longitudinal reinforcement 301 through plug welding.

[0050] Please refer to Figure 4 , the steel box 4 and the connecting piece 5 are connected through bolts, and the disc spring group 6 is fixed in the steel box 4 through bolts.

[0051] Specifically, the bolt hole at the top of the steel box 4 and the bolt hole at the bottom of the connecting piece 5 are centered and positioned, a bolt rod is inserted, the disc spring group 6 is inserted on the bolt rod in the steel box 4, and a nut is used for fixing.

[0052] Please refer to Figure 6 and Figure 7 , Figure 6 is a schematic diagram of a parallel disc spring group provided by the embodiment of the application, Figure 7A schematic diagram of a series disc spring group is provided for the embodiment of the present application. Specifically, the disc spring group 6 is a shape memory alloy disc spring group, which comprises a plurality of spacers 602 and a plurality of disc spring groups 603, and each disc spring group 603 comprises a plurality of disc spring pieces 601. The plurality of disc spring pieces 601 are stacked and arranged in parallel to form the disc spring group 603, and the adjacent disc spring groups 603 are separated and arranged in series by the spacers 602 to form the disc spring group 6.

[0053] The SMA disc spring group of the embodiment is first stacked and arranged in the same direction to form the disc spring group in parallel, and then the spacers are added between the disc spring groups to form the disc spring group in series. The spacers enable the adjacent disc spring groups to maintain stable contact during deformation. Through the arrangement of the disc spring group, the load-carrying capacity, stiffness and deformation capacity of the disc spring piece can be improved simultaneously, which solves the technical problem that the deformation capacity, load-carrying capacity and stiffness of the multi-disc spring cannot be improved simultaneously when the disc spring pieces are stacked in the same direction or in the opposite direction. The arrangement of the disc spring group can greatly reduce the residual deformation of the component and greatly improve the recoverable deformation capacity of the component, thereby meeting the large deformation and recoverable performance requirements of the self-centering component.

[0054] Please refer to Figure 8 and Figure 9 , Figure 8 A U-shaped ring three-dimensional view is provided for the embodiment of the present application, Figure 9 A schematic diagram of the connection between the connecting piece and the U-shaped ring is provided for the embodiment of the present application. Specifically, the side surface of each steel box 4 is vertically fixed with a first U-shaped ring 401, and the side surface of the connecting piece 5 is vertically fixed with a second U-shaped ring 501.

[0055] Specifically, the side surface of the steel box 4 is welded with one first U-shaped ring 401, which is located at the middle position of the steel box 4. The side surface of the connecting piece 5 is fixed with one second U-shaped ring 501, which is located at the middle position of the connecting piece 5. In the embodiment, the first U-shaped ring 401 and the second U-shaped ring 501 have the same structure.

[0056] Further, the four first U-shaped rings 401 on the side surfaces of the four steel boxes 4 can be welded together or not, preferably, the four first U-shaped rings 401 are welded together. The four second U-shaped rings 501 on the side surfaces of the four connecting pieces 5 can be welded together or not, preferably, the four second U-shaped rings 501 are welded together. Welding the U-shaped rings together can improve the overall stiffness of the steel box and the connecting piece.

[0057] In the embodiment, the U-shaped ring is used to fix and connect the lower steel box and the upper connecting piece at the column-column connection, which is convenient for centering and leveling at the construction site. The U-shaped ring is welded with the steel box and the connecting piece, and the system formed thereby has strong bending and shearing stiffness. Under the action of rare earthquakes, the column-column connection part is yielded later than other parts of the column body, thereby achieving the seismic performance goal of "strong connection and weak component".

[0058] In one embodiment, the surface shape of the first-order energy dissipation component 8 adopts a curved surface type, and the thickness of the first-order energy dissipation component 8 gradually increases and then gradually decreases from the middle to the two ends; correspondingly, the surface of the second-order energy dissipation component 9 adopts a curved surface complementary to the end surface of the first-order energy dissipation component 8, and the thickness of the second-order energy dissipation component 9 gradually decreases and then gradually increases from one end to the other end, as shown in Figure 5 .

[0059] It can be understood that the surface of the first-order energy dissipation component 8 in this embodiment has a change trend of gradually rising from concave to convex and then gradually falling from convex to concave from the middle to the two ends, and the surface of the second-order energy dissipation component 9 has a change trend of gradually falling from convex to concave and then gradually rising from concave to convex from one end to the other end.

[0060] Further, the end of the first-order energy dissipation component 8 is provided with a plurality of first bolt holes 801, and the surface of the second-order energy dissipation component 9 is provided with a plurality of second bolt holes 901, and the plurality of second bolt holes 901 correspond to the plurality of first bolt holes 801 one by one. The second-order energy dissipation component 9 and the first-order energy dissipation component 8 are fixed on the prefabricated reinforced concrete lower column 2 and the prefabricated reinforced concrete upper column 3 by bolts passing through the second bolt holes 901 and the first bolt holes 801 in turn.

[0061] In one embodiment, a plurality of steel boxes 4 are respectively connected with the upper column longitudinal reinforcement 301 at the lower end corner of the prefabricated reinforced concrete upper column 3, and a plurality of connecting pieces 5 are respectively connected with the lower column longitudinal reinforcement 201 at the upper end corner of the prefabricated reinforced concrete lower column 2.

[0062] It can be understood that the positions of the steel box 4 and the connecting piece 5 in this embodiment can be transposed, and the steel box is fixed on the prefabricated reinforced concrete upper column 3, the connecting piece is fixed on the prefabricated reinforced concrete lower column 2, and the disc spring group 6 is fixed in the steel box 4. The positional relationship and connection relationship of the first-order energy dissipation component 8, the second-order energy dissipation component 9, the second-order steel box 4, and the connecting piece 5 are the same as those in the above embodiment, and the structure can also achieve the effects of the above embodiment, which will not be described here.

[0063] The vertical bearing capacity of the prefabricated reinforced concrete upper column and lower column in this embodiment is directly transmitted through the upper connecting piece, the lower steel box and the concrete in the core thereof, the stress is clear, the force transmission is clear, the bolt connection bears part of the shear force, and under the action of earthquake, it will bear part of the tensile stress, the first-order energy dissipation component can also bear part of the bending moment and shear force, and there will be no weak point in the column body and the connecting surface.

[0064] Embodiment Two

[0065] On the basis of Embodiment One, the assembly process of the self-centering concrete column box type connecting structure with a double-stage hybrid energy dissipation component is described in this embodiment. The assembly process includes the following steps:

[0066] (1) prefabricated reinforced concrete lower column 2 and reinforced concrete upper column 3:

[0067] Specifically, the lower column longitudinal reinforcement 201 in the prefabricated reinforced concrete foundation 1 is pre-arranged in advance during prefabrication, the lower column longitudinal reinforcement 201 at the upper end of the prefabricated reinforced concrete lower column 2 is reserved for a steel segment connected to the steel box 4, and concrete is poured, and the prefabricated reinforced concrete lower column 2 is prefabricated, as shown in Figure 2 The upper column longitudinal reinforcement 301 in the prefabricated reinforced concrete upper column 3 is connected by binding the stirrups, the upper column longitudinal reinforcement 301 at the lower end of the prefabricated reinforced concrete upper column 3 is reserved for a steel segment connected to the connecting piece 5, and concrete is poured, and the prefabricated reinforced concrete upper column 3 is prefabricated, as shown in Figure 3 .

[0068] (2) preparation of steel box 4, connecting piece 5, first-order energy dissipation component 8 and second-order energy dissipation component 9:

[0069] Specifically, the processed steel plate is assembled into a steel box 4 and a connecting piece 5 using welding connection, first and second holes 402 and 502 for passing longitudinal reinforcement and bolt rods are respectively formed on the steel box 4 and the connecting piece 5, and a limiting pin 7 is welded on the side surface thereof, as shown in Figure 4 Limiting grooves 10 are formed on both sides of the first-order energy dissipation component 8, the surface is processed into an arc surface type with convex ends and a concave middle, and first bolt holes 801 are formed thereon, the surface of the second-order energy dissipation component 9 is processed into an arc surface type, complementary to the arc surface of the first-order energy dissipation component, and second bolt holes 901 are formed thereon, as shown in Figure 5 .

[0070] (3) assembly of disc spring group 6:

[0071] Specifically, the disc spring pieces 601 are first stacked in the same direction to form a disc spring group 603 in parallel, as shown in Figure 6 Then, the disc spring group 603 is separated by adding a gasket 602 to form a disc spring group 6 in series, as shown in Figure 7 .

[0072] (4) assembly of upper and lower columns and disc spring group:

[0073] Specifically, the steel segments reserved by the four corner lower column longitudinal reinforcements 201 of the prefabricated reinforced concrete lower column 2 are respectively placed into the first holes 402 of the steel boxes 4, and are fixedly connected by plug welding, the open ends of the four first U-shaped rings 401 are respectively welded at the middle positions of the four steel boxes 4, and the closed ends of the four first U-shaped rings 401 are welded together to form a whole. The steel segments reserved by the four corner upper column longitudinal reinforcements 301 of the prefabricated reinforced concrete upper column 3 are respectively placed into the second holes 502 of the connecting pieces 5, and are fixedly connected by plug welding, the open ends of the four second U-shaped rings 501 are respectively welded on the four connecting pieces 5, as shown in Figure 8 andFigure 9 As shown in the figure, and the four second U-shaped ring 501 closed end welded together, so that it becomes a whole. The prefabricated reinforced concrete column 3 hoisted to the corresponding position, the connector 5 and steel box 4 bolt hole for the centering positioning, threaded bolt rod, followed by threaded disc spring group 6, and fixed with the nut, complete assembly.

[0074] (5) the assembly of the first and second energy dissipation components:

[0075] Specifically, the limiting slot 10 on the first energy dissipation component 8 is placed at the limiting pin 7, and the second energy dissipation component 9 is placed at both ends of the first energy dissipation component 8, respectively. Bolt through the second bolt hole 901 and the first bolt hole 801 in turn to fix the energy dissipation component, get the column-column box type connection structure as shown in the figure. Figure 1

[0076] The prefabricated reinforced concrete upper and lower columns and each energy dissipation component of the embodiment can be completed in the factory, and directly assembled on site, the process is simple, the requirements for construction personnel are not high, and the site concrete wet work and various complex grouting processes can be greatly reduced, meeting the development concept of green and environmentally friendly prefabricated buildings under the background of "double carbon", with high construction efficiency, practicality and feasibility.

[0077] The above is a further detailed description of the present application in combination with a specific preferred embodiment, which cannot be considered as limiting the specific implementation of the present application to these descriptions. For ordinary skilled persons in the technical field to which the present application belongs, without departing from the concept of the present application, a number of simple deductions or substitutions can be made, which should be considered as falling within the protection scope of the present application.​

Claims

1. A self-centering concrete column column box connection structure with a double-stage hybrid energy dissipation component, characterized in that, The application relates to a prefabricated reinforced concrete foundation (1), a prefabricated reinforced concrete lower column (2), a prefabricated reinforced concrete upper column (3), a plurality of steel boxes (4), a plurality of connecting pieces (5), a plurality of disc spring groups (6), a plurality of first-order energy dissipation assemblies (8) and a plurality of second-order energy dissipation assemblies (9), wherein, the lower column longitudinal reinforcement (201) of the prefabricated reinforced concrete lower column (2) extends from the prefabricated reinforced concrete foundation (1); a plurality of the steel boxes (4) are connected with the lower column longitudinal reinforcement (201) at the upper end corners of the prefabricated reinforced concrete lower column (2), and a plurality of the connecting pieces (5) are connected with the upper column longitudinal reinforcement (301) at the lower end corners of the prefabricated reinforced concrete upper column (3); the plurality of steel boxes (4) and the plurality of connecting pieces (5) are connected through bolts in one-to-one correspondence, and the plurality of disc spring groups (6) are fixed in the plurality of steel boxes (4) through the bolts in one-to-one correspondence; the disc spring group (6) is a shape memory alloy disc spring group, comprising a plurality of gaskets (602) and a plurality of disc spring groups (603), the disc spring group (603) comprises a plurality of disc spring pieces (601), the plurality of disc spring pieces (601) are stacked and arranged to be connected in parallel to form the disc spring group (603), and the adjacent disc spring groups (603) are separated and arranged through the gaskets (602) to be connected in series to form the disc spring group (6); the side surfaces of the steel box (4) and the connecting piece (5) are provided with limiting pins (7), the surface shape of the first-order energy dissipation assembly (8) adopts an arc surface type with a concave middle portion and convex two ends, limiting grooves (10) corresponding to the limiting pins (7) are formed in the concave positions on the two sides of the first-order energy dissipation assembly (8), and the limiting pins (7) and the limiting grooves (10) are matched to limit the first-order energy dissipation assembly (8); one end of the first-order energy dissipation assembly (8) is fixed on the prefabricated reinforced concrete lower column (2) and provided with the second-order energy dissipation assembly (9) on the outer surface, and the other end is fixed on the prefabricated reinforced concrete upper column (3) and provided with the second-order energy dissipation assembly (9) on the outer surface; the surface shape of the first-order energy dissipation assembly (8) adopts an arc surface type, and the thickness of the first-order energy dissipation assembly (8) gradually increases from the middle portion to the two ends and then gradually decreases; the surface shape of the second-order energy dissipation assembly (9) adopts an arc surface type complementary to the surface of the first-order energy dissipation assembly (8); a plurality of first bolt holes (801) are formed in the end portion of the first-order energy dissipation assembly (8), and a plurality of second bolt holes (901) are formed in the surface of the second-order energy dissipation assembly (9), the plurality of second bolt holes (901) correspond to the plurality of first bolt holes (801) in one-to-one correspondence; the second-order energy dissipation assembly (9) and the first-order energy dissipation assembly (8) are fixed on the prefabricated reinforced concrete lower column (2) and the prefabricated reinforced concrete upper column (3) through bolts successively penetrating the second bolt holes (901) and the first bolt holes (801). ​ 2. The self-centering concrete column with dual-stage hybrid energy-dissipating component connection structure according to claim 1, characterized in that, The side of each steel box (4) is vertically fixed with several first U-shaped rings (401), and the side of the connecting piece (5) is vertically fixed with second U-shaped rings (501).

3. The self-centering concrete column with dual-stage hybrid energy-dissipating component connection structure according to claim 1, characterized in that, The bottom of the steel box (4) is provided with first holes (402) which are fixedly connected with the reserved steel segments of the lower column longitudinal reinforcement (201) through plug welding. The top of the connecting piece (5) is provided with second holes (502) which are fixedly connected with the reserved steel segments of the upper column longitudinal reinforcement (301) through plug welding.

4. The self-centering concrete column with dual hysteretic energy consuming components according to claim 1, wherein, The steel box (4) and the connecting piece (5) are connected through bolts, and the disc spring group (6) is fixed in the steel box (4) through the bolts.

5. The self-centering concrete column with dual-stage hybrid energy-dissipating component connection structure according to claim 1, wherein, The surface of the second-order energy dissipation component (9) adopts an arc surface which is complementary to the end surface of the first-order energy dissipation component (8), and the thickness of the second-order energy dissipation component (9) gradually decreases from one end to the other end and then gradually increases.

6. The self-centering concrete column with dual hysteretic energy-consuming component connection structure according to claim 1, characterized in that, Several steel boxes (4) are respectively connected with the upper column longitudinal reinforcement (301) of the upper end corner of the prefabricated reinforced concrete upper column (3), and several connecting pieces (5) are respectively connected with the lower column longitudinal reinforcement (201) of the upper end corner of the prefabricated reinforced concrete lower column (2).

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