Self-resetting bionic steel hinge assembled RC frame structure and assembling method thereof

Abstract

The application belongs to the technical field of civil engineering damping structure, and particularly discloses a self-resetting bionic steel hinge assembled RC frame structure and an assembling method thereof, the RC frame structure comprising a prefabricated column layer, a prefabricated beam, a bionic column hinge, a bionic beam hinge and a prestressed rod group, the bionic column hinge comprising a thigh boot and a shank boot, and the bionic beam hinge comprising a thigh connecting piece and a shank connecting piece. The bionic column hinge and the bionic beam hinge are used as connecting nodes between column bodies and between beams and columns, the bionic column hinge and the bionic beam hinge can bear bending moment and have good rotating capacity according to the characteristics of a plastic hinge, the thigh connecting piece, the shank connecting piece and the second energy dissipation plate in the bionic beam hinge respectively imitate the femur, the tibia and the ligament of a knee joint, and play the roles of supporting body weight, absorbing impact, keeping balance and providing flexibility, the thigh boot and the shank boot of the bionic column hinge simulate the femur and the tibia of a knee joint, and form a rotating mechanism cooperating with the ligament simulated by the first energy dissipation plate to perform stretching, flexing, internal and external rotation and locking movements.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of civil engineering shock-absorbing structures, and particularly relates to a self-resetting bionic steel hinge fabricated RC frame structure and a method for assembling the same. BACKGROUND

[0002] At present, China is in an important stage of deepening industrialization, marketization and internationalization. Industrialized buildings can improve construction speed, improve working environment and improve production efficiency, which is the trend of future development of the building industry. Fabricated building structures have the advantages of fast construction speed, short construction period, high material utilization rate, energy saving and environmental protection, and meet the needs of social green and healthy development. Fabricated building structures are the only way for the industrialization, greenization and sustainability of the building industry.

[0003] Although the traditional fabricated RC structure has sufficient seismic and ductility performance, the structure mainly relies on material damage to dissipate energy during an earthquake, resulting in large residual deformation of the structure after the earthquake, difficulty in repairing, poor economy and other problems.

[0004] In recent years, an important development trend of structural seismic design concept is to shift from preventing structural collapse to sustainable, recoverable and replaceable structure function. Based on this, the connection of the structural assembly area is taken as an opportunity to design a type steel hybrid connection structure with reasonable force, simple structure, easy installation and repair, and superior seismic performance. The type steel hybrid connection effectively resolves the lack of integrity of the assembly area, and achieves the function of structure repair control point. The replaceable type steel hybrid connection has deformation and energy dissipation performance in the structure, and dissipates energy and concentrates structural plastic deformation in the earthquake. After the earthquake, replacing the damaged energy dissipation component can realize the toughness recovery of the structure function. The development of replaceable type steel hybrid connection fabricated RC frame structure with excellent seismic performance, modularization, simple structure, clear force and easy repair function after the earthquake has very important practical significance for the popularization and application of fabricated structures. SUMMARY

[0005] In view of the above problems, the purpose of the present application is to provide a self-resetting bionic steel hinge fabricated RC frame structure and a method for assembling the same, to solve the problems of poor deformation capacity, deformation at the cost of material damage, difficulty in repairing after the earthquake, difficulty in replacing components, inability to reset and poor energy dissipation capacity of the fabricated frame structure in the prior art during an earthquake, and to achieve the design purpose of easy replacement and repairability of the structure after the earthquake.

[0006] The technical solution of the present application is: a self-resetting bionic steel hinge fabricated RC frame structure, comprising:

[0007] The prefabricated column layer has multiple layers and is used to be arranged on a building foundation and stacked along the vertical direction. Each layer of the prefabricated column layer comprises at least two prefabricated columns distributed at intervals.

[0008] There are multiple precast beams, which are arranged one by one between two adjacent precast columns in the same precast column layer;

[0009] There are multiple bionic column hinges, which are distributed one-to-one between the prefabricated column and the building foundation and between two vertically adjacent prefabricated columns. They include: a leg boot, which is used to be pre-buried in the building foundation or at one of the ends of the prefabricated column, and pre-buried in one of the connecting ends of two vertically adjacent prefabricated columns; a shank boot, which is used to be pre-buried in the building foundation and at the other of the ends of the prefabricated column, and pre-buried in the other of the connecting ends of two vertically adjacent prefabricated columns; the shank boot and the leg boot are connected by a first energy dissipation plate;

[0010] There are multiple bionic beam hinges, which are distributed one by one at the connection between the prefabricated columns and the prefabricated beams, including: a stock connector, which is embedded in one of the side walls of the prefabricated columns or the ends of the prefabricated beams; a shank connector, which is embedded in the other of the side walls of the prefabricated columns or the ends of the prefabricated beams, and the shank connector and the stock connector are connected through a second energy dissipation plate;

[0011] There are multiple groups of prestressed rods, which are correspondingly passed through the mutually connected strand connectors and shank connectors.

[0012] Furthermore, the thigh boot comprises:

[0013] Shoe-shaped square steel pipes are pre-buried in the building foundation or at any point on the end of a prefabricated column;

[0014] There are four T-shaped side plates of the shank boot, which are distributed on the four sides of the square steel tube of the shank boot. The T-shaped side plates of the shank boot are longer than the square steel tube of the shank boot. One end of the T-shaped side plates is flush with one end of the square steel tube of the shank boot, and the other end extends to the outside of the other end of the square steel tube of the shank boot and is provided with a first inclined groove. The bottom of the first inclined groove is flush with the other end of the square steel tube of the shank boot. The four first inclined grooves and the other end of the square steel tube of the shank boot form an embedded slot, and the shank boot is inserted in the embedded slot.

[0015] Furthermore, the thigh boot further comprises:

[0016] There are four horizontal ring plates of the stock shoe, which are arranged one by one at the bottom of the first inclined chute. The horizontal ring plates of the stock shoe are respectively connected to the square steel pipe of the stock shoe and the T-shaped side plate of the stock shoe;

[0017] There are four stock shoe baffles, which are arranged on the first inclined groove along the inclined surface of the first inclined groove in a one-to-one correspondence. The stock shoe baffles are respectively connected to the stock shoe square steel pipe and the stock shoe T-shaped side plate, and the stock shoe baffles constitute the oblique sides of the embedded slots.

[0018] Furthermore, the shin boot comprises:

[0019] Shank shoe square steel pipe, embedded in the building foundation or another place at the end of the precast column;

[0020] The tibial boot T-shaped side plate has four, which are distributed on the four sides of the tibial boot square steel tube. The tibial boot T-shaped side plate is equal in length to the tibial boot square steel tube, and the two ends of the tibial boot T-shaped side plate are flush with the two ends of the tibial boot square steel tube. The end of the tibial boot T-shaped side plate is provided with a second inclined groove, and the inclination of the second inclined groove corresponds to that of the first inclined groove. The four second inclined grooves and the end of the femoral boot square steel tube form an outwardly convex plug cone, which is inserted into the inwardly embedded slot.

[0021] Further, the tibial boot further comprises:

[0022] The tibial boot horizontal ring plate has four, which are correspondingly arranged at the bottom of the second inclined groove. The tibial boot horizontal ring plate is connected with the tibial boot square steel tube and the tibial boot T-shaped side plate respectively.

[0023] The tibial boot baffle has four, which are correspondingly arranged on the second inclined groove along the inclined surface of the second inclined groove. The tibial boot baffle is connected with the tibial boot square steel tube and the tibial boot T-shaped side plate respectively. The femoral boot baffle forms the inclined edge of the outwardly convex plug cone.

[0024] Further, the femoral connector comprises

[0025] The femoral connector is of an I-shaped structure, one end of which is arranged at any one of the end of the prefabricated column side wall or the prefabricated beam, and the other end is provided with a trapezoidal groove.

[0026] The femoral connector baffle is arranged on the femoral connector and distributed along the trapezoidal groove. The tibial connector is inserted into the trapezoidal groove and connected with the femoral connector baffle.

[0027] Further, the femoral connector further comprises:

[0028] The femoral connector end plate is arranged at the end of the femoral connector away from the trapezoidal groove. The femoral connector end plate is used for connecting the femoral connector with any one of the end of the prefabricated column side wall or the prefabricated beam.

[0029] The femoral connector horizontal rib plate is arranged on the femoral connector, one end of which is connected with the femoral connector end plate, and the other end is connected with the femoral connector baffle.

[0030] Further, the tibial connector comprises:

[0031] The tibial connector is of an I-shaped structure, one end of which is arranged at the other end of the prefabricated column side wall or the prefabricated beam, and the other end is provided with two inclined grooves, which cut the other end of the tibial connector into a trapezoidal protrusion.

[0032] The tibial connector baffle is distributed along the trapezoidal protrusion. The trapezoidal protrusion is inserted into the trapezoidal groove, and the tibial connector baffle is connected with the femoral connector baffle.

[0033] Further, the tibial connector further comprises:

[0034] The tibia connecting piece end plate is arranged at the end of the tibia connecting piece away from the trapezoidal protrusion, and is used for connecting the tibia connecting piece with the other part of the end of the prefabricated column sidewall or the prefabricated beam.

[0035] The tibia connecting piece horizontal rib plate is arranged on the tibia connecting piece, one end of the tibia connecting piece horizontal rib plate is connected with the tibia connecting piece end plate, and the other end of the tibia connecting piece horizontal rib plate is connected with the tibia connecting piece baffle.

[0036] A self-resetting bionic steel hinge assembled RC frame structure assembly method, comprising the following steps:

[0037] Any one of the femoral boots or tibia boots is embedded in the building foundation, the other one of the femoral boots or tibia boots is embedded at the bottom of the prefabricated column, and then the prefabricated column layer is assembled on the building foundation through the connection of the femoral boots and the tibia boots; the aforementioned steps are repeated to complete the assembly of a prefabricated column layer;

[0038] Any one of the femoral connecting pieces or tibia connecting pieces is embedded on one of the prefabricated columns, the other one of the femoral connecting pieces or tibia connecting pieces is embedded at the end of the prefabricated beam, then one end of the prefabricated beam is assembled on the prefabricated column through the connection of the femoral connecting pieces and the tibia connecting pieces, and the other end of the prefabricated beam is assembled on another adjacent prefabricated column in the same way to complete the assembly of a prefabricated beam, then the prestressed rod groups are assembled on the connected femoral connecting pieces and tibia connecting pieces one by one, and prestress is applied to the prestressed rod groups; the aforementioned steps are repeated to complete the assembly of a prefabricated column layer corresponding to the prefabricated beam;

[0039] The aforementioned steps are repeated to complete the overall assembly of multiple prefabricated column layers.

[0040] Compared with the prior art, the beneficial effects of the present application are that:

[0041] The present application is based on bionic column hinges and bionic beam hinges as connecting nodes between column bodies and between beams and columns, the bionic column hinges and the bionic beam hinges are designed according to the characteristics of the plastic hinge that can withstand bending moment and has good rotation capacity, and the working mechanism of the human knee joint that can rotate flexibly when bearing a large concentrated load, to replace the plastic hinge in the RC structure.

[0042] In the process of human movement, the tibial tuberosity of the femur and the femoral groove of the tibia form a rotating mechanism cooperating with ligaments to perform stretching, flexion, internal and external rotation, and locking movements. Among them, the femoral connecting piece, the tibia connecting piece and the second energy dissipation plate in the bionic beam hinge respectively simulate the femur, the tibia and the ligament, and play the role of supporting body weight, absorbing impact, maintaining balance and providing flexibility. Among them, the femoral boots and the tibia boots of the bionic column hinge simulate the femur and the tibia of the knee joint, form a rotating mechanism cooperating with the ligaments simulated by the first energy dissipation plate, and can perform stretching, flexion, internal and external rotation, and locking movements.

[0043] Under the action of small earthquake, the structure is in elastic state; under the action of medium earthquake, the beam hinge yields prior to the column hinge, the upper and lower sides of the beam hinge are tensioned and pressed to dissipate energy and the stock connecting piece and the shin connecting piece are rubbed to dissipate energy, since the beam hinges are uniformly distributed in the structure, the deformation of the beam hinges is also uniformly distributed in the structure, so that the deformation of the lateral member of the frame is sufficient, and the structure also begins to swing and dissipate energy, in addition, after the beam hinge node enters plastic deformation, the prestressed bar group can reset the node, which can effectively reduce the residual deformation of the frame under medium earthquake; under the action of large earthquake or beyond earthquake, the column hinge also begins to yield, but due to the existence of the resetting force of the beam node, the residual deformation of the column hinge can be effectively reduced; under the action of earthquake, the column hinge and the beam hinge energy dissipation plate only need to be disassembled to dissipate energy to realize the repair of the structure, and finally the prestress of the beam hinge node can be adjusted again. BRIEF DESCRIPTION OF DRAWINGS

[0044] Figure 1 is a structural schematic diagram of the application;

[0045] Figure 2 is a structural schematic diagram of the application for assembling the stock boot, the shin boot and the stock connecting piece of the prefabricated column;

[0046] Figure 3 is a structural schematic diagram of the application for assembling the shin connecting piece of the prefabricated beam;

[0047] Figure 4 is a structural schematic diagram of the application for assembling the prefabricated beam;

[0048] Figure 5 is a structural schematic diagram of the application for assembling the stock boot;

[0049] Figure 6 is a structural schematic diagram of the application for assembling the shin boot;

[0050] Figure 7 is an exploded view of the bionic beam hinge of the application;

[0051] Figure 8 is a structural schematic diagram of the stock connecting piece of the application;

[0052] Figure 9 is a structural schematic diagram of the shin connecting piece of the application;

[0053] Figure 10 is a structural schematic diagram of the prestressed bar group of the application;

[0054] Figure 11 is a structural schematic diagram of the first energy dissipation plate of the application;

[0055] Figure 12 is a structural schematic diagram of the second energy dissipation plate of the application;

[0056] Figure 13 is a working schematic diagram of the present application, wherein a is a structural schematic diagram under force state, b is a structural schematic diagram under force acting in left direction, and c is a structural schematic diagram under force acting in right direction;

[0057] Figure 14 is a model yield schematic diagram of the present application;

[0058] Figure 15 is a hysteresis curve schematic diagram of the present application.

[0059] Wherein, 1-precast column layer, 2-precast beam, 21-I-shaped steel, 22-flame-retardant foam glue, 23-reinforced concrete, 3-bionic column hinge, 31-sock, 310-embedded slot, 311-sock square steel tube, 312-sock T-shaped side plate, 3120-sock mounting hole, 313-sock horizontal ring plate, 314-sock baffle, 3140-sock limiting hole, 32-shin, 320-outer convex plug, 321-shin square steel tube, 322-shin T-shaped side plate, 3220-shin mounting hole, 323-shin horizontal ring plate, 324-shin baffle, 3240-shin limiting hole, 4-bionic beam hinge, 41-sock connector, 410-trapezoidal groove, 411-sock connector, 4110-sock connector mounting hole, 412-sock connector baffle, 4120-sock connector limiting hole, 413-sock connector end plate, 4130-sock connector prestress hole, 414-sock connector horizontal rib plate, 42-shin connector, 420-trapezoidal protrusion, 421-shin connector, 4210-shin connector mounting hole, 422-shin connector baffle, 4220-shin connector limiting hole, 423-shin connector end plate, 4230-shin connector prestress hole, 424-shin connector horizontal rib plate, 5-prestressed rod group, 51-prestressed rod, 52-clamp, 6-first energy dissipation plate, 7-second energy dissipation plate, 70-second mounting hole, 700-damage control hole. DETAILED DESCRIPTION

[0060] The specific embodiments of the present application will be described in detail below. Figures 1 to 15 In the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0061] The terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include one or more of such features; in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0062] Example

[0063] like Figure 1 The self-resetting bionic steel hinge assembled RC frame structure shown includes a prefabricated column layer 1, a prefabricated beam 2, a bionic column hinge 3, a bionic beam hinge 4 and a prestressed rod group 5.

[0064] There are multiple layers of prefabricated column layers 1, which are used to be placed on the building foundation and stacked vertically. Each prefabricated column layer 1 includes at least two prefabricated columns distributed at intervals. There are multiple prefabricated beams 2, which are placed one by one between two adjacent prefabricated columns in the same prefabricated column layer 1. Figure 2 As shown, there are multiple bionic column hinges 3, which are distributed one by one between the prefabricated column and the building foundation and between two vertically adjacent prefabricated columns. The bionic column hinge 3 includes a leg boot 31 and a shank boot 32. The leg boot 31 is used to be pre-buried in the building foundation or at one of the ends of the prefabricated column, and pre-buried in one of the connection ends of two vertically adjacent prefabricated columns. The shank boot 32 is used to be pre-buried in the building foundation and at another location of the end of the prefabricated column, and pre-buried in another location of the connection ends of two vertically adjacent prefabricated columns; the shank boot 32 is connected to the leg boot 31 through the first energy dissipation plate 6. As shown Figure 2 、 Figure 3 、 Figure 7 As shown, there are multiple bionic beam hinges 4, distributed one-to-one at the connection between the precast column and the precast beam 2. The bionic beam hinges 4 include a leg connector 41 and a shank connector 42. The leg connector 41 is embedded in one of the precast column sidewalls or the end of the precast beam 2, and the shank connector 42 is embedded in the other of the precast column sidewalls or the end of the precast beam 2. The shank connector 42 and the leg connector 41 are connected by a second energy dissipation plate 7. There are multiple groups of prestressed rods 5, which are connected one-to-one through the connected leg connectors 41 and shank connectors 42.

[0065] The prefabricated columns in this embodiment are prefabricated reinforced concrete columns. Figure 4 As shown, the precast beam 2 includes an I-shaped steel 21, flame-retardant foam rubber 22 and reinforced concrete 23. The flame-retardant foam rubber 22 is placed near the middle of the web of the I-shaped steel 21, and the other parts are cast with reinforced concrete 23. While effectively reducing the self-weight of the precast beam 2, the bearing capacity and fire resistance of the beam can be effectively improved.

[0066] Preferably, Figure 5As shown, the thigh shoe 31 includes a thigh shoe square steel tube 311 and thigh shoe T-shaped side plates 312. The thigh shoe square steel tube 311 is embedded in either the building foundation or the end of the prefabricated column. The thigh shoe T-shaped side plates 312 are four in number and are distributed on the four side edges of the thigh shoe square steel tube 311. The thigh shoe T-shaped side plates 312 are longer than the thigh shoe square steel tube 311. One end of the thigh shoe T-shaped side plates 312 is flush with one end of the thigh shoe square steel tube 311, and the other end extends beyond the other end of the thigh shoe square steel tube 311 and is provided with a first inclined groove. The bottom of the first inclined groove is flush with the other end of the thigh shoe square steel tube 311. The four first inclined grooves and the other end of the thigh shoe square steel tube 311 form an embedded insertion slot 310. The shin shoe 32 is inserted into the embedded insertion slot 310.

[0067] It should be noted that the thigh shoe square steel tube 311 is a square steel tube, and the thigh shoe T-shaped side plates 312 are I-shaped steel cut from the web. The thigh shoe T-shaped side plates 312 are T-shaped structures, and the cut web is vertically welded to the side wall of the thigh shoe square steel tube 311 and located on the symmetry axis of the side wall of the thigh shoe square steel tube 311. The flange of the thigh shoe T-shaped side plate 312 is parallel to the side wall of the corresponding thigh shoe square steel tube 311. The flange of the thigh shoe T-shaped side plate 312 is provided with a thigh shoe mounting hole 3120.

[0068] Preferably, the thigh shoe 31 further includes thigh shoe horizontal ring plates 313 and thigh shoe baffle plates 314. The thigh shoe horizontal ring plates 313 are four in number and are provided in one-to-one correspondence on the bottom of the first inclined groove. The thigh shoe horizontal ring plates 313 are connected to the thigh shoe square steel tube 311 and the thigh shoe T-shaped side plates 312, respectively. The thigh shoe baffle plates 314 are four in number and are provided in one-to-one correspondence along the inclined surface of the first inclined groove. The thigh shoe baffle plates 314 are connected to the thigh shoe square steel tube 311 and the thigh shoe T-shaped side plates 312, respectively, and form the inclined edge of the embedded insertion slot 310. The thigh shoe horizontal ring plates 313 are used to improve the overall shear carrying capacity of the thigh shoe 31. The thigh shoe baffle plates 314 are provided with thigh shoe limiting holes 3140.

[0069] Preferably, as shown in Figure 6 The shin shoe 32 includes a shin shoe square steel tube 321 and shin shoe T-shaped side plates 322. The shin shoe square steel tube 321 is embedded in the other of the building foundation or the end of the prefabricated column. The shin shoe T-shaped side plates 322 are four in number and are distributed on the four side edges of the shin shoe square steel tube 321. The shin shoe T-shaped side plates 322 are equal in length to the shin shoe square steel tube 321. The two ends of the shin shoe T-shaped side plates 322 are flush with the two ends of the shin shoe square steel tube 321. The end of the shin shoe T-shaped side plate 322 is provided with a second inclined groove. The second inclined groove corresponds in inclination to the first inclined groove. The four second inclined grooves and the end of the thigh shoe square steel tube 311 form an outwardly convex insertion cone 320. The outwardly convex insertion cone 320 is inserted into the embedded insertion slot 310.

[0070] It should be noted that the square steel tube 321 of the shin guard is also square steel tube, and the T-shaped side plate 322 of the shin guard is also I-shaped steel cut from the web, which is T-shaped structure, and the cut web is vertically welded on the side wall of the square steel tube 321 of the shin guard and located on the symmetry axis of the side wall of the square steel tube 321 of the shin guard, the flange of the T-shaped side plate 322 of the shin guard is parallel to the side wall of the square steel tube 321 of the shin guard, and the flange of the T-shaped side plate 322 of the shin guard is provided with a shin guard mounting hole 3220.

[0071] After the convex plug 320 is inserted into the embedded slot 310, the first energy dissipation plate 6 is used to fix the T-shaped side plate 312 of the thigh guard and the T-shaped side plate 322 of the shin guard, the first energy dissipation plate 6 is a metal plate with the same width as the T-shaped side plate 312 of the thigh guard and the T-shaped side plate 322 of the shin guard, as shown in Figure 11 , the first energy dissipation plate 6 is provided with first mounting holes 60 corresponding to the thigh guard limiting hole 3140 and the shin guard mounting hole 3220, and the first energy dissipation plate 6 is mounted on the T-shaped side plate 312 of the thigh guard and the T-shaped side plate 322 of the shin guard by high-strength bolts.

[0072] Preferably, the shin guard 32 further comprises a shin guard horizontal ring plate 323 and a shin guard baffle 324. The shin guard horizontal ring plate 323 has four, one-to-one corresponding to the bottom of the second inclined groove, and the shin guard horizontal ring plate 323 is connected with the square steel tube 321 of the shin guard and the T-shaped side plate 322 of the shin guard respectively. The shin guard baffle 324 has four, one-to-one corresponding to the inclined surface of the second inclined groove, and the shin guard baffle 324 is connected with the square steel tube 321 of the shin guard and the T-shaped side plate 322 of the shin guard respectively, and the thigh guard baffle 314 forms the bevel of the convex plug 320. The shin guard horizontal ring plate 323 is used to improve the overall shear carrying capacity of the shin guard 32, the shin guard baffle 324 is provided with a shin guard limiting hole 3240, the shin guard limiting hole 3240 corresponds in position to the thigh guard limiting hole 3140, and the shin guard baffle 324 is connected by high-strength bolts.

[0073] Preferably, as shown in Figure 7 , Figure 8 , the thigh connector 41 comprises a thigh connector 411 and a thigh connector baffle 412. The thigh connector 411 is I-shaped structure, one end of which is arranged at any one of the side wall of the prefabricated column or the end of the prefabricated beam 2, and the other end is provided with a trapezoidal groove 410. The thigh connector baffle 412 is arranged on the thigh connector 411 and distributed along the trapezoidal groove 410; the shin connector 42 is inserted into the trapezoidal groove 410 and connected with the thigh connector baffle 412.

[0074] The strand connector 411 is made of a I-shaped steel with a web cut into a trapezoidal groove 410, and the strand connector 411 is provided with a strand connector mounting hole 4110. The strand connector baffle 412 is made of a square steel plate bent according to the shape of the trapezoidal groove 410, and the middle section of the strand connector baffle 412 is symmetrically provided with two strand connector limiting holes 4120, and the strand connector baffle 412 is vertically and symmetrically welded on the web of the strand connector 411.

[0075] Preferably, the strand connector 41 further comprises a strand connector end plate 413 and a strand connector horizontal rib plate 414. The strand connector end plate 413 is arranged at the end of the strand connector 411 away from the trapezoidal groove 410, and the strand connector end plate 413 is used for connecting the strand connector 411 with any one of the end of the prefabricated column side wall or the prefabricated beam 2. The strand connector horizontal rib plate 414 is arranged on the strand connector 411, one end of which is connected with the strand connector end plate 413, and the other end of which is connected with the strand connector baffle 412.

[0076] The strand connector end plate 413 is arranged to facilitate the connection with other components, and the strand connector horizontal rib plate 414 is arranged to enhance the compression resistance of the strand connector 41. The strand connector end plate 413 is provided with a strand connector prestress hole 4130.

[0077] Preferably, as shown in Figure 7 、 Figure 9 The shin connector 42 comprises a shin connector 421 and a shin connector baffle 422. The shin connector 421 is a I-shaped structure, one end of which is arranged at another position of the end of the prefabricated column side wall or the prefabricated beam 2, and the other end of which is provided with two inclined grooves cutting the other end of the shin connector 421 into a trapezoidal protrusion 420. The shin connector baffle 422 is distributed along the trapezoidal protrusion 420; the trapezoidal protrusion 420 is inserted into the trapezoidal groove 410, and the shin connector baffle 422 is connected with the strand connector baffle 412.

[0078] The shin connector 421 is made of a I-shaped steel with a web cut into a trapezoidal protrusion 420, and the shin connector 421 is provided with a shin connector mounting hole 4210. The shin connector baffle 422 is made of a square steel plate bent according to the shape of the strand connector trapezoidal protrusion 420, and the middle plate is symmetrically provided with two shin connector limiting holes 4220, and is vertically and symmetrically welded on the web of the shin connector 421.

[0079] After the trapezoidal protrusion 420 is inserted into the trapezoidal groove 410, the second energy dissipation plate 7 is used to fix the femoral connector 411 and the tibial connector 421. The second energy dissipation plate 7 is a C-shaped structure which is bent from a square steel plate. A second installation hole 70 is formed on the second energy dissipation plate 7 corresponding to the positions of the femoral connector installation hole 4110 and the tibial connector installation hole 4210. The second energy dissipation plate 7 is installed on the femoral connector 411 and the tibial connector 421 by high-strength bolts.

[0080] In addition, as shown in Figure 12 The second energy dissipation plate 7 is also provided with a damage control hole 700. The damage control hole 700 can effectively concentrate the damage of the second energy dissipation plate 7 in the cross-section weakening area, thereby effectively achieving the purpose of controlling structural damage.

[0081] Preferably, the tibial connector 42 further comprises a tibial connector end plate 423 and a tibial connector horizontal rib plate 424. The tibial connector end plate 423 is arranged at the end of the tibial connector 421 away from the trapezoidal protrusion 420. The tibial connector end plate 423 is used for connecting the tibial connector 421 with the other part of the end of the precast column side wall or the precast beam 2. The tibial connector horizontal rib plate 424 is arranged on the tibial connector 421. One end of the tibial connector horizontal rib plate 424 is connected with the tibial connector end plate 423, and the other end is connected with the tibial connector baffle 422.

[0082] The tibial connector end plate 423 is arranged to facilitate connection with other components. The tibial connector horizontal rib plate 424 is arranged to enhance the compression resistance of the tibial connector 42. The tibial connector end plate 423 is provided with a tibial connector prestressed hole 4230.

[0083] Preferably, as shown in Figure 7 Figure 10 The prestressed rod set 5 comprises a prestressed rod 51 and a clamp 52. The prestressed rod 51 is provided with threads on the outer side walls of both ends. The clamp 52 comprises two nuts which are respectively and correspondingly installed on the two ends of the prestressed rod 51. After the femoral connector 41 and the tibial connector 42 are assembled, the prestressed rod 51 is arranged in the tibial connector limiting hole 4220 and the tibial connector prestressed hole 4230. The prestressed rod 51 is prestressed by changing the distance between the two nuts at both ends by using the clamp 52.

[0084] It should be noted that the tibial boot 32 of the embodiment is pre-installed at the bottom of the precast column, and the femoral boot 31 is pre-installed at the top of the same precast column. The building foundation is pre-installed with the femoral boot 31. The precast columns of the first layer of precast columns 1 are arranged on the building foundation through the tibial boots 32. The precast columns of the second layer of precast columns 1 are arranged on the femoral boots 31 at the top of the precast columns corresponding to the positions of the first layer of precast columns 1 through the tibial boots 32 at the bottom of the precast columns.

[0085] The femoral connector 41 is pre-installed on the precast column, and the tibial connector 42 is pre-installed at the end of the precast beam 2.

[0086] An assembling method of a self-resetting bionic steel hinge assembled RC frame structure, comprising the following steps:

[0087] The calf shoe 32 is embedded in the bottom of the prefabricated column, and then the prefabricated column layer 1 is assembled on the building foundation through the connection of the thigh shoe 31 and the calf shoe 32; the foregoing steps are repeated to complete the assembly of the prefabricated column layer 1, and then the first energy dissipation plate 6 is installed on the thigh shoe T-shaped side plate 312 and the calf shoe T-shaped side plate 322 through high-strength bolts. It should be noted that if the second prefabricated column layer 1 is multi-layer, the thigh shoe 31 needs to be embedded at the top of the prefabricated column of the non-top prefabricated column layer 1.

[0088] The thigh connector 41 is embedded on the prefabricated column, the calf connector is embedded at the end of the prefabricated beam 2, and then the prefabricated beam 2 is assembled between the two adjacent prefabricated columns through the connection of the thigh connector 41 and the calf connector 42. The second energy dissipation plate 7 is installed on the thigh connector 411 and the calf connector 421 through high-strength bolts, and the assembly of a prefabricated beam 2 is completed. The prestressed rod 51 is arranged in the calf connector limiting hole 4220 and the calf connector prestressed hole 4230, and the prestressed rod 51 is prestressed by changing the distance between the two nuts at both ends by using the clamp 52. The foregoing steps are repeated to complete the overall assembly of the multi-layer prefabricated column layer 1.

[0089] In this embodiment, each component is connected mechanically, so if a component is damaged locally after an earthquake, it can be easily replaced. The design goal of this structure is that under rare earthquakes, the bionic column hinge 3 is in a yield state, and the bionic beam hinge 4 can restore the initial state. To ensure the reset of the bionic beam hinge 4, the force applied by the prestressed bar group 5 is 1.5 times the ultimate bearing capacity of the bionic beam hinge 4. The prestressed bar group 5, the first energy dissipation plate 6, and the second energy dissipation plate 7 can be replaced and repaired, greatly reducing the post-earthquake repair workload of the structure, and the structure damage location is preset to achieve the purpose of controllable structure damage.Wherein: ① The design of the trapezoidal groove and the tibial rise of the bionic beam hinge 4 and the bionic column hinge 3, that is, the embedded slot 310 and the trapezoidal groove 410, and the outer convex plug 320 and the trapezoidal convex 420, not only facilitates the production of connection, but also can form mechanical occlusion force when installed, avoiding the erection of the installation support; secondly, the connection of the bionic beam hinge 4 and the bionic column hinge 3 decouples the shear and bending of the traditional node, and when the earthquake comes, the main deformation is borne by the mechanical occlusion of the groove and the tibial rise, and the bending moment is mainly borne by the energy dissipation, which can effectively realize the control of the connection strength; in addition, the groove and the tibial rise provide sufficient and flexible rotation ability for the connection; ② The first energy dissipation plate 6 and the second energy dissipation plate 7 of the bionic beam hinge 4 and the bionic column hinge 3 are bolted around the connection, and when damage occurs, the first energy dissipation plate 6 and the second energy dissipation plate 7 can be replaced by only removing the bolts; when the structural performance needs to be adjusted, the thickness, shape and material of the energy dissipation can be changed to change the structural performance, for example, the first energy dissipation plate 6 and the second energy dissipation plate 7 are replaced by a memory alloy plate, then the bionic beam hinge 4 and the bionic column hinge 3 become self-resetting nodes; ③ The self-resetting bionic steel hinge assembly type RC frame structure has three lines of defense: the first energy dissipation plate 6 and the second energy dissipation plate 7 are the first line of defense of the structure, mainly providing lateral stiffness for the structure; the limiting bolt between the bionic beam hinge 4 and the bionic column hinge 3 is the second line of defense, which can effectively control the rotation of the connection once the first energy dissipation plate 6 and the second energy dissipation plate 7 are damaged; the groove and the tibial rise of the bionic beam hinge 4 and the bionic column hinge 3 are the third line of defense, and the occlusion force of the groove and the tibial rise can clamp the structure and make it fall off; ④ The bionic beam hinge 4 connection adopts prestress to provide beam connection reset force, which can also constrain the plastic deformation of the column to some extent; in addition, the prestressed rod 51 is arranged on both sides of the prefabricated beam 2, and the installation, removal and prestress monitoring are convenient, and when the structure needs to reset the performance, the clamp 52 of the prestressed rod can be tightened; compared with the traditional assembly type reinforced concrete structure, there is no wet work on the construction site, and convenient construction and assembly are realized; the present application changes the difficulty of flexible repair of the traditional assembly type frame structure, and uses replaceable first energy dissipation plate 6 and second energy dissipation plate 7 to concentrate the main deformation of the structure, so that the structure can be flexibly repaired by only replacing the first energy dissipation plate 6 and the second energy dissipation plate 7 after the earthquake; the bionic column hinge 3 and the steel hinge designed in the present application are simple in structure, reasonable in stress, and can effectively avoid the installation precision of the assembly type structure; compared with the traditional same type component, the present application reduces the use of welding connection mode, and all the main force connecting pieces are connected by bolts, avoiding the residual stress caused by welding; the present application avoids the difficulty of controlling the damage position of the traditional assembly type frame structure, and designs the bionic column hinge 3 and the bionic beam hinge 4, the bearing capacity of the bionic beam hinge 4 is lower than that of the bionic column hinge 3, which can ensure that the bionic beam hinge 4 yields before the bionic column hinge 3, and the bearing capacity of the bionic beam hinge 4 and the bionic column hinge 3 is smaller than that of the prefabricated component connected therewith, so as to ensure that the structural damage occurs in the expected position and order, and the precise damage control of the structure can be realized, which is easy to be widely applied and promoted.

[0090] Experimental example

[0091] Based on the self-resetting bionic steel hinge assembled RC frame structure proposed in the embodiment, tension and compression simulation experiments were performed on it.

[0092] The self-resetting bionic steel hinge assembled RC frame structure has push-pull symmetry. Whether it is in tension or compression, the shear wall stress state is always consistent. Figure 15 The system hysteresis curve is completely symmetrical on the left and right.

[0093] like Figure 13 、 14 As shown, when under push state: the Changliang bionic hinge connection has to withstand the complex forces such as bending moment, shear force and axial force. The shear and axial bearing capacity of the Changliang bionic hinge connection is completely dependent on the thigh connector 41 and the shank connector 42 and the limiter. It is required that the shear bearing capacity of the Changliang bionic hinge connection must be greater than that of the concrete beam to ensure that the connection system is not damaged during use.

[0094] The bending moment is primarily borne by the energy dissipation plate. If the energy dissipation plate is damaged or requires redesign, the energy dissipation system can be directly replaced by removing the high-strength bolts. Because the self-centering bionic steel strand frame structure is centrally symmetrical, the stress state of the constant beam bionic hinge connection remains the same regardless of positive or negative loads.

[0095] like Figure 13 The figure shows the working process of the self-resetting bionic steel strand under positive and negative loads. When the load acts on the frame column end, the second energy absorbing plate 7 on one side of the Changliang bionic hinge connection is subjected to tension, and the second energy absorbing plate 7 on the other side is subjected to compression. The concrete beam provides shear force transmission through the pre-buried strand connector 41 and shank connector 42, allowing the beam to rotate relative to the column under bending moment. The gap between the flanges is reserved to ensure the rotation space, so that the upper and lower second energy absorbing plates 7 are deformed and dissipate the seismic energy. When the thin plate undergoes local buckling deformation under pressure, the component reaches the yield bearing moment. As a connection of prefabricated components, the Changliang bionic hinge connection device directly bears the load in normal use. Under the action of a large earthquake, it yields before the concrete component to ensure the formation of the beam hinge mode of the frame structure. The Changliang bionic hinge connection has a strong deformation capacity. It dissipates most of the seismic energy of the structure and concentrates the plastic damage of the structure to protect the concrete components.

[0096] The load bearing capacity of the column-hinged connection is mainly borne by the thigh shoe 31, the shin shoe 32 and the first energy dissipation plate 6, which is designed to control the column end bending moment with a strength threshold without weakening the column load bearing capacity, and to transfer the moment and dissipate seismic energy by the first energy dissipation plate 6. As shown in the figure, when a positive displacement load acts on the column end, the upper part of the column-hinged connection node rotates around one of the bottom corners of its trapezoidal section, and the corner is close to the compression side. The rear first energy dissipation plate 6 is in tension, the front first energy dissipation plate 6 is in compression, and the two sides of the first energy dissipation plate 6 are divided into compression and tension zones by the rotation fulcrum. There is vertical pressure and interaction force between the thigh shoe 31 and the shin shoe 32. The thigh shoe square steel tube 311 and the shin shoe square steel tube 321 play a restraining role in the deformation of concrete, avoiding premature local damage. The shear force in the prefabricated column is transmitted to the foundation through the compression of the contact area between the thigh shoe 31 and the shin shoe 32. The interface between the shin shoe 32 and the embedded slot 310 can separate from each other, allowing possible relative rotation, thereby promoting the compression or tension of the first energy dissipation plate 6 to yield to dissipate seismic energy. During the entire stress process, the node deformation is mainly concentrated on the first energy dissipation plate 6, the concrete prefabricated component part is in elastic state, only the part of the steel connecting bolt hole is in plastic state, but the deformation is small, which does not affect the disassembly of the whole structure, so the node only needs to disassemble the bolt to replace the energy dissipation plate to realize the repair of the structure.

[0097] The above specific embodiments further illustrate the purpose, technical solutions and advantages of the present application. It should be understood that the above description is only a specific embodiment of the present application and does not limit the present application. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application is included in the protection scope of the present application.

Claims

1. A self-resetting bionic steel hinge assembled RC frame structure, characterized in that: include: The prefabricated column layer (1) has multiple layers and is used to be arranged on a building foundation and stacked vertically, and each prefabricated column layer (1) includes at least two prefabricated columns distributed at intervals; There are multiple prefabricated beams (2), which are arranged in a one-to-one correspondence between two adjacent prefabricated columns in the same prefabricated column layer (1); There are multiple bionic column hinges (3), which are distributed one by one between the prefabricated column and the building foundation and between two vertically adjacent prefabricated columns, and include: a leg boot (31), which is used to be pre-buried in the building foundation or at one of the ends of the prefabricated column, and pre-buried in one of the connection ends of two vertically adjacent prefabricated columns; a shank boot (32), which is used to be pre-buried in the building foundation and at the other of the ends of the prefabricated column, and pre-buried in the other of the connection ends of two vertically adjacent prefabricated columns; the shank boot (32) is connected to the leg boot (31) through a first energy dissipation plate (6); There are multiple bionic beam hinges (4), which are distributed one by one at the connection between the prefabricated column and the prefabricated beam (2), and include: a stock connector (41), which is embedded in one of the side walls of the prefabricated column or the end of the prefabricated beam (2); a shank connector (42), which is embedded in the other of the side walls of the prefabricated column or the end of the prefabricated beam (2), and the shank connector (42) is connected to the stock connector (41) through a second energy dissipation plate (7); There are multiple prestressed rod groups (5), which are correspondingly arranged on the mutually connected thigh connectors (41) and shank connectors (42).

2. The self-resetting bionic steel hinge assembled RC frame structure according to claim 1, characterized in that: The thigh boot (31) comprises: The square steel tube (311) is embedded in the building foundation or at any point of the prefabricated column end; There are four T-shaped side plates (312) of the shank boot, which are distributed on the four sides of the shank boot square steel tube (311). The shank boot T-shaped side plates (312) are longer than the shank boot square steel tube (311). One end of the T-shaped side plates (312) is flush with one end of the shank boot square steel tube (311), and the other end extends to the outside of the other end of the shank boot square steel tube (311) and is provided with a first inclined groove. The bottom of the first inclined groove is flush with the other end of the shank boot square steel tube (311). The four first inclined grooves and the other end of the shank boot square steel tube (311) form an embedded slot (310), and the shank boot (32) is inserted into the embedded slot (310).

3. The self-resetting bionic steel hinge assembled RC frame structure according to claim 2, characterized in that: The thigh boot (31) further comprises: There are four stock shoe horizontal ring plates (313), which are arranged one by one at the bottom of the first chute. The stock shoe horizontal ring plates (313) are respectively connected to the stock shoe square steel pipe (311) and the stock shoe T-shaped side plate (312); There are four stock shoe baffles (314), which are arranged on the first inclined groove along the inclined surface of the first inclined groove in a one-to-one correspondence. The stock shoe baffles (314) are respectively connected to the stock shoe square steel pipe (311) and the stock shoe T-shaped side plate (312). The stock shoe baffles (314) constitute the oblique sides of the embedded slot (310).

4. The self-resetting bionic steel hinge assembled RC frame structure according to claim 3, characterized in that: The shin boot (32) comprises: Shank square steel tube (321), embedded in the building foundation or at another location at the end of the prefabricated column; There are four shin boot T-shaped side plates (322) distributed on the four sides of the shin boot square steel tube (321). The shin boot T-shaped side plates (322) are equal in length to the shin boot square steel tube (321), and their two ends are flush with the two ends of the shin boot square steel tube (321). The ends of the shin boot T-shaped side plates (322) are provided with second inclined grooves, and the inclination of the second inclined grooves corresponds to the inclination of the first inclined grooves. The four second inclined grooves and the ends of the shin boot square steel tube (311) form an outward convex plug cone (320), and the outward convex plug cone (320) is inserted into the embedded slot (310).

5. The self-resetting bionic steel hinge assembled RC frame structure according to claim 4, characterized in that: The shin boot (32) further comprises: There are four shin shoe horizontal ring plates (323), which are arranged one by one at the bottom of the second inclined groove. The shin shoe horizontal ring plates (323) are respectively connected to the shin shoe square steel tube (321) and the shin shoe T-shaped side plate (322); There are four shin boot baffles (324), which are arranged on the second slant groove along the inclined surface of the second slant groove in a one-to-one correspondence. The shin boot baffles (324) are respectively connected to the shin boot square steel tube (321) and the shin boot T-shaped side plate (322). The shin boot baffles (314) constitute the oblique edge of the outward convex plug cone (320).

6. The self-resetting bionic steel hinge assembled RC frame structure according to claim 1, characterized in that: The strand connector (41) comprises The strand connecting member (411) is an I-shaped structure, one end of which is arranged at any one of the side walls of the prefabricated column or the end of the prefabricated beam (2), and the other end is provided with a trapezoidal groove (410); The thigh connecting member baffle (412) is arranged on the thigh connecting member (411) and distributed along the trapezoidal groove (410); the shank connecting member (42) is inserted into the trapezoidal groove (410) and connected to the thigh connecting member baffle (412).

7. The self-resetting bionic steel hinge assembled RC frame structure according to claim 6, characterized in that: The strand connector (41) further comprises: The strand connector end plate (413) is provided at an end of the strand connector (411) away from one end of the trapezoidal groove (410), and the strand connector end plate (413) is used to connect the strand connector (411) to any one of the side walls of the prefabricated column or the end of the prefabricated beam (2); The strand connecting member horizontal rib (414) is provided on the strand connecting member (411), one end of which is connected to the strand connecting member end plate (413), and the other end of which is connected to the strand connecting member baffle (412).

8. The self-resetting bionic steel hinge assembled RC frame structure according to claim 6, characterized in that: The shank connector (42) includes: The shank connecting member (421) is an I-shaped structure, one end of which is arranged at the other end of the prefabricated column side wall or the end of the prefabricated beam (2), and the other end is provided with two inclined grooves, which cut the other end of the shank connecting member (421) into a trapezoidal protrusion (420); The shin connecting member baffle (422) is distributed along the trapezoidal protrusion (420); the trapezoidal protrusion (420) is inserted into the trapezoidal groove (410), and the shin connecting member baffle (422) is connected to the thigh connecting member baffle (412).

9. The self-resetting bionic steel hinge assembled RC frame structure according to claim 8, characterized in that: The shank connector (42) further comprises: a shank connector end plate (423) provided at an end of the shank connector (421) away from one end of the trapezoidal protrusion (420), the shank connector end plate (423) being used to connect the shank connector (421) to another location of the prefabricated column side wall or the end of the prefabricated beam (2); The shin connector horizontal rib (424) is provided on the shin connector (421), one end of which is connected to the shin connector end plate (423), and the other end of which is connected to the shin connector baffle (422).

10. A method for assembling a self-resetting bionic steel hinge assembled RC frame structure, characterized in that: The following steps are involved: Embedding either the stock boot (31) or the shank boot (32) in the building foundation, embedding the other stock boot (31) or the shank boot (32) in the bottom of the prefabricated column, and then assembling the prefabricated column layer (1) on the building foundation by connecting the stock boot (31) and the shank boot (32); repeating the above steps to complete the assembly of one layer of prefabricated column layer (1); Embed any one of the strand connectors (41) or the shank connectors (42) on one of the prefabricated columns, and embed the other of the strand connectors (41) or the shank connectors (42) on the end of the prefabricated beam (2), and then assemble one end of the prefabricated beam (2) on the prefabricated column by connecting the strand connector (41) and the shank connector (42), and similarly assemble the other end of the prefabricated beam (2) on another adjacent prefabricated column to complete the assembly of one prefabricated beam (2), and then assemble the prestressed rod group (5) one by one on the interconnected strand connectors (41) and the shank connectors (42), and apply prestress to the prestressed rod group (5); repeat the above steps to complete the assembly of the prefabricated beam (2) corresponding to one prefabricated column layer (1); Repeat the above steps to complete the overall assembly of the multi-layer prefabricated column layer (1).

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