Self-resetting bionic steel hinge assembly type RC frame structure and assembly method thereof

Abstract

The invention belongs to the technical field of civil engineering damping structures, and particularly discloses a self-resetting bionic steel hinge assembly type RC frame structure and an assembly method.The RC frame structure comprises a prefabricated column layer, a prefabricated beam, a bionic column hinge, a bionic beam hinge and a prestressed rod set, and the bionic column hinge comprises a strand shoe and a shank shoe; the bionic beam hinge comprises a strand connecting piece and a shin connecting piece. Based on the fact that bionic column hinges and bionic beam hinges serve as connecting joints between column bodies and between beam columns, according to the characteristics that plastic hinges can bear bending moment and have good rotating capacity, thigh connecting pieces, shin connecting pieces and second energy dissipation plates in the bionic beam hinges simulate thighbones, shins and ligaments of knee joints correspondingly, and the effects of supporting the body weight, improving the rigidity of the knee joints and improving the rigidity of the knee joints are achieved. The thigh boot and the tibia boot of the bionic column hinge simulate the thighbone and the tibia of the knee joint, a rotating mechanism is formed, and the rotating mechanism is matched with the ligament simulated by the first energy consumption plate to conduct stretching, buckling, internal and external rotation and buckling movement.

Description

Technical Field

[0001] The invention belongs to the technical field of civil engineering shock-absorbing structures, and in particular relates to a self-resetting bionic steel hinge assembled RC frame structure and an assembly method thereof. Background Art

[0002] At present, my country is in an important stage of in-depth development of industrialization, marketization and internationalization. Industrialized construction can increase construction speed, improve working environment and increase production efficiency, which is the trend of future development of the construction industry. Prefabricated 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 green and healthy development of society. Prefabricated building structures are the only way for the industrialization, greening and sustainable development of the construction industry.

[0003] Although traditional prefabricated RC structures have sufficient seismic resistance and ductility, the structures mainly rely on material damage and destruction to consume energy during earthquakes, resulting in large residual deformation of the structures after earthquakes, difficulty in repair, and poor economic efficiency.

[0004] In recent years, an important development trend of the structural seismic design concept is to shift from preventing structural collapse to sustainable, restorable and replaceable structural functions. Based on this, taking the connection of the structural assembly area as an opportunity, a steel hybrid connection structure with reasonable force, simple structure, convenient installation and repair, and excellent seismic performance is designed. While effectively resolving the lack of integrity of the assembly area, it meets the structural repair function requirements with the connection as the control point. The replaceable steel hybrid connection has both deformation and energy dissipation performance in the structure. It consumes energy and concentrates the plastic deformation of the structure during the earthquake. Replacing the damaged energy-consuming components after the earthquake can achieve the toughness recovery of the structural function. The research and development of replaceable steel hybrid connection prefabricated RC frame structure with excellent seismic performance, modular and easy to disassemble, simple structure, clear force, and easy to repair after the earthquake is of great practical significance for the promotion and application of prefabricated structures. Summary of the invention

[0005] In view of the above-mentioned problems, the purpose of the present invention is to provide a self-resetting bionic steel-hinge assembled RC frame structure and an assembly method thereof, so as to solve the problems of poor deformation capacity of the assembled frame structure in the prior art during an earthquake, deformation at the expense of material damage, difficulty in post-earthquake repair, difficulty in component replacement, inability to reset, and poor energy consumption capacity, thereby achieving the design purpose of no damage or low damage to the structure during an earthquake and easy replacement and repair after an earthquake.

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

[0007] The prefabricated column layer has multiple layers, which are arranged on the building foundation and stacked vertically, and each prefabricated column layer includes at least two prefabricated columns distributed at intervals;

[0008] There are a plurality of 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 by one between the prefabricated column and the building foundation and between two vertically adjacent prefabricated columns, and include: a leg boot, which is used to be embedded in the building foundation or one of the ends of the prefabricated column, and embedded in one of the connecting ends of two vertically adjacent prefabricated columns; a shank boot, which is used to be embedded in the building foundation and the other of the ends of the prefabricated column, and embedded in the other of the connecting ends of two vertically adjacent prefabricated columns; the shank boot is connected to the leg boot through a first energy dissipation plate;

[0010] There are multiple bionic beam hinges, which are distributed one by one at the connection between the prefabricated column and the prefabricated beam, and include: a stock connector, which is embedded in one of the side walls of the prefabricated column or the end of the prefabricated beam; a shank connector, which is embedded in another part of the side wall of the prefabricated column or the end of the prefabricated beam, and the shank connector is connected to the stock connector through a second energy dissipation plate;

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

[0012] Furthermore, the thigh boot comprises:

[0013] The square steel tube is embedded in the building foundation or at any point at the end of the prefabricated column;

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

[0015] Furthermore, the thigh boot also includes:

[0016] There are four horizontal ring plates of the stock shoe, which are arranged one by one at the bottom of the first inclined groove, and 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 edges of the embedded slots.

[0018] Furthermore, the shin boot comprises:

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

[0020] There are four T-shaped side plates of the shin boot, which are distributed on the four sides of the square steel tube of the shin boot. The T-shaped side plates of the shin boot are of the same length as the square steel tube of the shin boot, and their two ends are flush with the two ends of the square steel tube of the shin boot. The ends of the T-shaped side plates of the shin boot are provided with second inclined grooves, and the inclination of the second inclined grooves corresponds to that of the first inclined grooves. The four second inclined grooves and the ends of the square steel tube of the shin boot form an outward convex cone, and the outward convex cone is inserted in the embedded slot.

[0021] Furthermore, the shin boot also includes:

[0022] There are four shank shoe horizontal ring plates, which are arranged one by one at the bottom of the second inclined groove, and the shank shoe horizontal ring plates are respectively connected to the shank shoe square steel pipe and the shank shoe T-shaped side plate;

[0023] There are four shin boot baffles, which are arranged on the second inclined groove along the inclined surface of the second inclined groove in a one-to-one correspondence. The shin boot baffles are respectively connected to the shin boot square steel pipe and the shin boot T-shaped side plate, and the shin boot baffles constitute the hypotenuse of the outward convex plug cone.

[0024] Furthermore, the strand connector includes

[0025] The strand connecting piece is an I-shaped structure, one end of which is arranged at any place of the side wall of the precast column or the end of the precast beam, and the other end is provided with a trapezoidal groove;

[0026] The thigh connecting member baffle is arranged on the thigh connecting member and distributed along the trapezoidal groove; the shank connecting member is inserted into the trapezoidal groove and connected with the thigh connecting member baffle.

[0027] Furthermore, the strand connector also includes:

[0028] The strand connector end plate is arranged at the end of the strand connector away from one end of the trapezoidal groove, and the strand connector end plate is used to connect the strand connector with any one of the side walls of the prefabricated column or the end of the prefabricated beam;

[0029] The horizontal rib of the strand connecting member is arranged on the strand connecting member, one end of which is connected to the end plate of the strand connecting member, and the other end of which is connected to the baffle plate of the strand connecting member.

[0030] Furthermore, the shank connector includes:

[0031] The shank connecting piece is an I-shaped structure, one end of which is arranged at the other end of the precast column side wall or the end of the precast beam, and the other end is provided with two inclined grooves, and the two inclined grooves cut the other end of the shank connecting piece into a trapezoidal protrusion;

[0032] The shin connecting member baffle is distributed along the trapezoidal protrusion; the trapezoidal protrusion is inserted into the trapezoidal groove, and the shin connecting member baffle is connected with the thigh connecting member baffle.

[0033] Furthermore, the shank connector further comprises:

[0034] A shank connector end plate, provided at an end of the shank connector away from one end of the trapezoidal protrusion, the shank connector end plate being used for connecting the shank connector to another location of a prefabricated column side wall or a prefabricated beam end;

[0035] The shank connecting member horizontal rib is arranged on the shank connecting member, one end of which is connected to the shank connecting member end plate, and the other end of which is connected to the shank connecting member baffle.

[0036] An assembly method of a self-resetting bionic steel hinge assembled RC frame structure comprises the following steps:

[0037] Embed one of the stock boots or the shank boots in the building foundation, embed the other of the stock boots or the shank boots in the bottom of the prefabricated column, and then assemble the prefabricated column layer on the building foundation by connecting the stock boots and the shank boots; repeat the above steps to complete the assembly of one layer of prefabricated column layer;

[0038] Embed a strand connector or a shank connector on one of the prefabricated columns, embed the other strand connector or the shank connector on the end of the prefabricated beam, and then assemble one end of the prefabricated beam on the prefabricated column by connecting the strand connector and the shank connector. Similarly, assemble the other end of the prefabricated beam on another adjacent prefabricated column to complete the assembly of a prefabricated beam, and then assemble the prestressed rod group one by one on the strand connector and the shank connector connected to each other, and apply prestress to the prestressed rod group; repeat the above steps to complete the assembly of the prefabricated beam corresponding to one layer of prefabricated columns;

[0039] Repeat the above steps to complete the overall assembly of multi-layer prefabricated column layers.

[0040] Compared with the prior art, the present invention has the following beneficial effects:

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

[0042] During human movement, it supports body weight, absorbs shock, maintains balance, and provides flexibility. The tibial ridge of the femur and the femoral groove of the tibia form a rotation mechanism that cooperates with the ligament to perform extension, flexion, internal and external rotation, and locking movements. Among them, the femoral connector, tibial connector, and the second energy dissipation plate in the bionic beam hinge respectively imitate the femur, tibia, and ligament of the knee joint, and play the role of supporting body weight, absorbing shock, maintaining balance, and providing flexibility. Among them, the femoral boot and tibial boot of the bionic column hinge simulate the femur and tibia of the knee joint, forming a rotation mechanism that cooperates with the ligament simulated by the first energy dissipation plate to perform extension, flexion, internal and external rotation, and locking movements.

[0043] Under the action of a small earthquake, the structure is in an elastic state; under the action of a medium earthquake, the beam hinge yields before the column hinge, and the energy-absorbing plates on the upper and lower sides of the beam hinge absorb energy by tension and compression, and the stock connector stock groove and the shank connector absorb energy by friction. Since the beam hinges are evenly distributed in the structure, the deformation of the beam hinges is also evenly distributed in the structure, so that the deformation of the lateral components of the frame is sufficient, and the structure also begins to swing and consume energy. In addition, after the beam hinge node enters plastic deformation, the prestressed rod group will pull the node back to its original position, which can effectively reduce the residual deformation of the frame in a medium earthquake; under a large earthquake or an earthquake beyond the earthquake, the column hinge also begins to yield, but due to the presence of the beam node reset force, the residual deformation of the column hinge can be effectively reduced; under the action of an earthquake, the column hinge and the beam hinge energy-absorbing plates only need to be disassembled to dissipate energy to achieve structural repair, and finally the prestress of the beam hinge node can be adjusted again. The present invention is based on the optimal energy dissipation mechanism of the frame structure. The present invention is based on the optimal energy dissipation mechanism of the frame structure, with beam hinges first and column hinges later, and has the advantages of convenient installation and replacement of the reset system, simple structure, convenient installation, low cost, and easy to be widely promoted. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 It is a schematic diagram of the structure of the present invention;

[0045] Figure 2 It is a structural schematic diagram of a prefabricated column assembly leg boot, shank boot, and leg connector of the present invention;

[0046] Figure 3 It is a structural schematic diagram of the prefabricated beam assembly shank connector of the present invention;

[0047] Figure 4 It is a structural schematic diagram of the prefabricated beam of the present invention;

[0048] Figure 5 It is a schematic diagram of the structure of the thigh boot of the present invention;

[0049] Figure 6 It is a schematic structural diagram of the shin boot of the present invention;

[0050] Figure 7 This is a structural exploded diagram of the bionic beam hinge of the present invention;

[0051] Figure 8 It is a structural schematic diagram of the strand connector of the present invention;

[0052] Fig. 9 is a schematic structural diagram of the shank connector of the present invention;

[0053] Fig.10 It is a structural schematic diagram of the prestressed rod group of the present invention;

[0054] Fig.11 It is a structural schematic diagram of the first energy dissipation plate of the present invention;

[0055] Fig.12 is a schematic structural diagram of the second energy dissipation plate of the present invention;

[0056] Fig.13 1 is a schematic diagram of the working of the present invention, wherein a is a schematic diagram of the structure under a force state, b is a schematic diagram of the structure under a force acting in the left direction, and c is a schematic diagram of the structure under a force acting in the right direction;

[0057] Fig.14 It is a schematic diagram of the yield of the model of the present invention;

[0058] Fig.15 It is a schematic diagram of the hysteresis curve of the present invention.

[0059] Among them, 1-prefabricated column layer, 2-prefabricated beam, 21-I-shaped steel, 22-flame retardant foam rubber, 23-reinforced concrete, 3-bionic column hinge, 31-stock boot, 310-embedded slot, 311-stock boot square steel pipe, 312-stock boot T-shaped side plate, 3120-stock boot mounting hole, 313-stock boot horizontal ring plate, 314-stock boot baffle, 3140-stock boot limiting hole, 32-leg boot, 320-external convex cone, 321-leg boot square steel pipe, 322-leg boot T-shaped side plate, 3220-leg boot mounting hole, 323-leg boot horizontal ring plate, 324-leg boot baffle, 3240-leg boot limiting hole, 4-bionic beam hinge, 41-stock connector, 410-trapezoidal groove, 411-stock connector Connector, 4110-strand connector mounting hole, 412-strand connector baffle, 4120-strand connector limiting hole, 413-strand connector end plate, 4130-strand connector prestressed hole, 414-strand connector horizontal rib, 42-tibia connector, 420-trapezoidal protrusion, 421-tibia connector, 4210-tibia connector mounting hole, 422-tibia connector baffle, 4220-tibia connector limiting hole, 423-tibia connector end plate, 4230-tibia connector prestressed hole, 424-tibia connector horizontal rib, 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] Combine the following Figures 1 to 15 , the specific implementation methods of the present invention are described in detail. In the description of the present invention, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0061] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the 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 comprises 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 arranged 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 embedded in the building foundation or one of the ends of the prefabricated column, and embedded in one of the connecting ends of two vertically adjacent prefabricated columns. The shank boot 32 is used to be embedded in the building foundation and the other end of the prefabricated column, and embedded in the other connecting end 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, which are distributed one by one at the connection between the prefabricated column and the prefabricated beam 2. The bionic beam hinge 4 includes a stock connector 41 and a shank connector 42. The stock connector 41 is embedded in one of the side walls of the prefabricated column or the end of the prefabricated beam 2, and the shank connector 42 is embedded in another part of the side walls of the prefabricated column or the end of the prefabricated beam 2. The shank connector 42 is connected to the stock connector 41 through the second energy dissipation plate 7. There are multiple groups of prestressed rod groups 5, which are correspondingly arranged on the stock connector 41 and the shank connector 42 connected to each other.

[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, a 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 poured 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 leg boot 31 includes a leg boot square steel tube 311 and a leg boot T-shaped side plate 312. The leg boot square steel tube 311 is pre-buried in the building foundation or at any point at the end of the prefabricated column. There are four leg boot T-shaped side plates 312, which are distributed on the four sides of the leg boot square steel tube 311. The leg boot T-shaped side plates 312 are longer than the leg boot square steel tube 311, one end of which is flush with one end of the leg boot square steel tube 311, and the other end extends to the outside of the other end of the leg 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 leg boot square steel tube 311, and the four first inclined grooves and the other end of the leg boot square steel tube 311 form an embedded slot 310, and the leg boot 32 is inserted into the embedded slot 310.

[0067] It should be noted that: in this embodiment, the stock boot square steel tube 311 adopts a square steel tube, and the stock boot T-shaped side plate 312 is an I-shaped steel cut from the web, which is a T-shaped structure, and the cut web is vertically welded to the side wall of the stock boot square steel tube 311, and is located on the symmetry axis of the side wall of the stock boot square steel tube 311, the flange of the stock boot T-shaped side plate 312 is parallel to the corresponding side wall of the stock boot square steel tube 311, and the stock boot mounting hole 3120 is provided on the flange of the stock boot T-shaped side plate 312.

[0068] Preferably, the stock shoe 31 further includes a stock shoe horizontal ring plate 313 and a stock shoe baffle plate 314. There are four stock shoe horizontal ring plates 313, which are arranged at the bottom of the first chute in a one-to-one correspondence, and 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 baffle plates 314, which are arranged on the first chute along the inclined surface of the first chute in a one-to-one correspondence, and the stock shoe baffle plates 314 are respectively connected to the stock shoe square steel pipe 311 and the stock shoe T-shaped side plate 312, and the stock shoe baffle plates 314 constitute the hypotenuse of the embedded slot 310. The stock shoe horizontal ring plate 313 is used to improve the overall shear bearing capacity of the stock shoe 31, and the stock shoe baffle plates 314 are provided with stock shoe limiting holes 3140.

[0069] Preferably, Figure 6 As shown, the shin boot 32 includes a shin boot square steel tube 321 and a shin boot T-shaped side plate 322. The shin boot square steel tube 321 is pre-buried 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, which are 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 that 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.

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

[0071] After the convex insert cone 320 is inserted into the embedded slot 310, the first energy dissipation plate 6 is used to fix the hip boot T-shaped side plate 312 and the shin boot T-shaped side plate 322. The first energy dissipation plate 6 is a metal plate with the same width as the hip boot T-shaped side plate 312 and the shin boot T-shaped side plate 322. Fig.11 As shown, the first energy dissipation plate 6 is provided with a first mounting hole 60 corresponding to the hip boot limiting hole 3140 and the shin boot mounting hole 3220, and the first energy dissipation plate 6 is mounted on the hip boot T-shaped side plate 312 and the shin boot T-shaped side plate 322 by high-strength bolts.

[0072] Preferably, the shin boot 32 further includes a shin boot horizontal ring plate 323 and a shin boot baffle plate 324. There are four shin boot horizontal ring plates 323, which are arranged at the bottom of the second chute in a one-to-one correspondence. The shin boot horizontal ring plates 323 are connected to the shin boot square steel tube 321 and the shin boot T-shaped side plate 322 respectively. There are four shin boot baffle plates 324, which are arranged on the second chute along the inclined surface of the second chute in a one-to-one correspondence. The shin boot baffle plates 324 are connected to the shin boot square steel tube 321 and the shin boot T-shaped side plate 322 respectively, and the thigh boot baffle plate 314 constitutes the hypotenuse of the convex plug cone 320. The shin boot horizontal ring plate 323 is used to improve the overall shear bearing capacity of the shin boot 32. The shin boot baffle plate 324 is provided with a shin boot limiting hole 3240, which corresponds to the position of the thigh boot limiting hole 3140 and is connected by a high-strength bolt.

[0073] Preferably, Figure 7 , Figure 8 As shown, the shank connector 41 includes a shank connector 411 and a shank connector baffle 412. The shank connector 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 shank connector baffle 412 is arranged on the shank connector 411 and distributed along the trapezoidal groove 410; the shank connector 42 is inserted into the trapezoidal groove 410 and connected to the shank connector baffle 412.

[0074] The strand connector 411 is made of an I-shaped steel with a trapezoidal groove 410 cut into the web, and a strand connector mounting hole 4110 is provided on the strand connector 411. The strand connector baffle 412 is formed by bending a square steel plate in the shape of the trapezoidal groove 410, and two strand connector limiting holes 4120 are symmetrically provided in the middle section of the strand connector baffle 412, and the strand connector baffle 412 is vertically symmetrically welded to 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 disposed at the 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 with any one of the side walls of the prefabricated column or the end of the prefabricated beam 2. The strand connector horizontal rib plate 414 is disposed on the strand connector 411, with one end connected to the strand connector end plate 413 and the other end connected to the strand connector baffle plate 412.

[0076] The strand connector end plate 413 is provided to facilitate connection with other components, and the strand connector horizontal ribs 414 are provided to enhance the compression resistance of the strand connector 41. The strand connector end plate 413 is provided with strand connector prestressed holes 4130.

[0077] Preferably, Figure 7 , Fig. 9 As shown, the shin connector 42 includes a shin connector 421 and a shin connector baffle 422. The shin connector 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 oblique grooves, and the two oblique grooves cut 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 to the thigh connector baffle 412.

[0078] The shank connector 421 is made of an I-shaped steel with a web cut into a trapezoidal protrusion 420, and a shank connector mounting hole 4210 is provided on the shank connector 421. The shank connector baffle 422 is formed by bending a square steel plate in the shape of the thigh connector trapezoidal protrusion 420, and two shank connector limiting holes 4220 are symmetrically provided in the middle plate, which are vertically symmetrically welded to the web of the shank 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 thigh connector 411 and the shank connector 421. The second energy dissipation plate 7 is a C-shaped structure, which is formed by bending a square steel plate. A second mounting hole 70 corresponding to the position of the thigh connector mounting hole 4110 and the shank connector mounting hole 4210 is opened on it. The second energy dissipation plate 7 is installed on the thigh connector 411 and the shank connector 421 by high-strength bolts.

[0080] In addition, if Fig.12 As shown, the second energy dissipation plate 7 is further provided with a damage control hole 700 , which can effectively concentrate the damage of the second energy dissipation plate 7 in the weakened area of ​​the cross section, thereby effectively achieving the purpose of controlling structural damage.

[0081] Preferably, the shin connector 42 further comprises a shin connector end plate 423 and a shin connector horizontal rib plate 424. The shin connector end plate 423 is disposed at the end of the shin connector 421 away from one end of the trapezoidal protrusion 420, and the shin connector end plate 423 is used to connect the shin connector 421 with another part of the prefabricated column side wall or the end of the prefabricated beam 2. The shin connector horizontal rib plate 424 is disposed on the shin connector 421, one end of which is connected to the shin connector end plate 423, and the other end is connected to the shin connector baffle plate 422.

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

[0083] Preferably, Figure 7 Fig.10 As shown, the prestressed rod group 5 includes a prestressed rod 51 and a clamp 52. The outer walls at both ends of the prestressed rod 51 are provided with threads, and the clamp 52 includes two nuts that are threadedly installed on both ends of the prestressed rod 51 in a one-to-one correspondence. After the thigh connector 41 and the shank connector 42 are assembled, the prestressed rod 51 is inserted into the shank connector limiting hole 4220 and the shank connector prestressing hole 4230, and the prestressed rod 51 is prestressed at both ends by using the clamp 52 to change the distance between the two nuts.

[0084] It should be noted that: in this embodiment, the shank boot 32 is preset at the bottom of the prefabricated column, the stock boot 31 is preset at the top of the same prefabricated column, the stock boot 31 is preset on the building foundation, and the prefabricated columns of the first prefabricated column layer 1 are set on the building foundation through the shank boot 32. The prefabricated columns of the second prefabricated column layer 1 are set on the stock boot 31 at the top of the prefabricated column corresponding to the position of the first prefabricated column layer 1 through the shank boot 32 at the bottom thereof.

[0085] The strand connector 41 is preset on the prefabricated column, and the shank connector 42 is preset on the end of the prefabricated beam 2 .

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

[0087] The stock boot 31 is embedded in the building foundation, the shank boot 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 between the stock boot 31 and the shank boot 32; the above steps are repeated to complete the assembly of one layer of prefabricated column layer 1, and then the first energy dissipation plate 6 is installed on the stock boot T-shaped side plate 312 and the shank boot T-shaped side plate 322 through high-strength bolts. It should be noted that: if the second prefabricated column layer 1 is multi-layered, the stock boot 31 needs to be embedded on the top of the prefabricated column of the prefabricated column layer 1 other than the top layer.

[0088] The stock connector 41 is embedded in the prefabricated column, and the shank connector is embedded in the end of the prefabricated beam 2. Then, the prefabricated beam 2 is assembled between two adjacent prefabricated columns by connecting the stock connector 41 and the shank connector 42. The second energy dissipation plate 7 is installed on the stock connector 411 and the shank connector 421 by high-strength bolts to complete the assembly of a prefabricated beam 2. Then, the prestressed rod 51 is inserted into the shank connector limit hole 4220 and the shank connector prestressed hole 4230, and the prestressed rod 51 is applied with a clamp 52 at both ends by changing the distance between the two nuts. Repeat the above steps to complete the overall assembly of the multi-layer prefabricated column layer 1.

[0089] In this embodiment, since all components are mechanically connected, after an earthquake, if a component is partially damaged, it can be easily replaced; the structural design goal is that under rare earthquakes, the bionic column hinge 3 is in a yield state, and the bionic beam hinge 4 can restore to an initial state. To ensure the resettability of the bionic beam hinge 4, the force applied by the prestressed rod group 5 is 1.5 times the ultimate bearing capacity of the bionic beam hinge 4; the prestressed rod group 5, the first energy absorption plate 6, and the second energy absorption plate 7 can all be replaced and repaired, which greatly reduces the workload of post-earthquake repair of the structure, and the structural damage position is preset to achieve the purpose of controllable structural damage.Among them: ① The design of the trapezoidal groove and shank of the bionic beam hinge 4 and the bionic column hinge 3, the trapezoidal groove is the embedded slot 310 and the trapezoidal groove 410, and the shank is the convex cone 320 and the trapezoidal protrusion 420, which not only facilitates the production of the connection, but also can form a mechanical bite force during installation, avoiding the construction of installation supports; secondly, the connection between the bionic beam hinge 4 and the bionic column hinge 3 decouples the shear and bending of the traditional nodes. When an earthquake occurs, the strength of the connection is mainly borne by the mechanical bite of the groove and the shank, and the bending moment is mainly borne by the energy consumption, which can effectively realize the control of the connection strength; in addition, the groove and the shank provide sufficient and flexible rotation capacity 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 both installed around the connection with bolts. Once In case of damage, the first energy dissipation plate 6 and the second energy dissipation plate 7 can be replaced by removing the bolts; when the structural performance needs to be adjusted, the thickness, shape and material of the energy dissipation plate can be changed to change the structural performance. For example, if the first energy dissipation plate 6 and the second energy dissipation plate 7 are replaced with memory alloy plates, the bionic beam hinge 4 and the bionic column hinge 3 will become self-resetting nodes; ③ The self-resetting bionic steel hinge assembled 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, which mainly provide lateral stiffness for the structure; the limit bolts between the connection of the bionic beam hinge 4 and the bionic column hinge 3 are the second line of defense. Once the first energy dissipation plate 6 and the second energy dissipation plate 7 are damaged, the limit bolts can effectively control the rotation of the connection; the grooves and shanks of the bionic beam hinge 4 and the bionic column hinge 3 are The third line of defense, the bite force of the femoral groove and the shin can clamp the structure and prevent it from falling out bionically; ④ The bionic beam hinge 4 connection adopts prestressing to provide the beam connection reset force, which can also restrain the plastic deformation of the column to a certain extent; in addition, the prestressed rod 51 is arranged on both sides of the prefabricated beam 2, and the installation, disassembly and prestress monitoring are convenient, and when the structure needs to be reset and the performance needs to be improved, it is only necessary to tighten the clamp 52 of the prestressed rod; compared with the traditional prefabricated reinforced concrete structure, since there is no wet operation on the construction site, convenient construction and assembly are achieved; the present invention changes the deficiency of the traditional prefabricated frame structure that is difficult to repair with toughness, and adopts the replaceable first energy consumption plate 6 and the second energy consumption plate 7 to concentrate the main deformation of the structure. After the earthquake, only the first energy consumption plate 6 and the second energy consumption plate 7 need to be replaced to achieve Tough repair of the structure; the bionic column hinge 3 and steel hinge designed in the present invention have simple structure, reasonable force, and can effectively avoid the installation accuracy in the prefabricated structure; compared with traditional components of the same type, the present invention reduces the use of welding connection methods, and all the main force-bearing connectors are connected by bolts, avoiding the residual stress caused by welding; the present invention avoids the difficulty in controlling the damage position of the traditional prefabricated frame structure, and designs the bionic column hinge 3 and 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 are both smaller than the prefabricated components connected thereto, ensuring that the structural damage occurs in the expected position and sequence, and the precise damage of the structure can be controlled, 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, a tension and compression simulation experiment was 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. Fig.15 The system hysteresis curve is completely symmetrical on the left and right.

[0093] like Fig.13 , 14 As shown, when under pushing 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 completely depends 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 mainly borne by the energy dissipation plate. Once the energy dissipation plate is damaged or needs to be redesigned, the energy dissipation system can be directly replaced by removing the high-strength bolts. Because the self-resetting bionic steel strand frame structure has central symmetry, the stress state of the constant beam bionic hinge connection is the same regardless of positive or negative loads.

[0095] like Fig.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 pulled, and the second energy absorbing plate 7 on the other side is compressed. The concrete beam provides shear force transmission through the embedded strand connector 41 and the shank connector 42, allowing the beam to rotate relative to the column under the 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 components 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 bearing capacity of the column hinge connection is mainly borne by the stock boot 31, the shank boot 32 and the first energy dissipation plate 6. The first energy dissipation plate 6 is intended to control the bending moment of the column end with the strength threshold without weakening the bearing capacity of the column, and use the first energy dissipation plate 6 for moment transmission and seismic energy dissipation. As shown in the figure, when the positive displacement load acts on the column end, the upper part of the column hinge connection node rotates around a bottom angle of its trapezoidal cross section, and the angle is close to the compression side. The first energy dissipation plate 6 at the back is in a tensile state, and the first energy dissipation plate 6 at the front is in a compressed state. The first energy dissipation plates 6 on both sides are divided into a compression zone and a tension zone with the rotation fulcrum as the boundary. There is a vertical pressure and an interaction force between the convex and concave groove walls between the stock boot 31 and the shank boot 32. The stock boot square steel pipe 311 and the shank boot square steel pipe 321 play a restraining role in the deformation of the concrete and avoid local premature failure. The shear force in the prefabricated column is transmitted to the foundation through the compression of the contact area between the stock boot 31 and the shank boot 32. The interface between the shank shoe 32 and the embedded slot 310 can be separated from each other, allowing possible relative rotation, thereby promoting the yielding of the compressed or stretched first energy dissipation plate 6 to dissipate seismic energy. During the entire force-bearing process, the node deformation is mainly concentrated on the first energy dissipation plate 6, the concrete prefabricated component part is in an elastic state, and only the steel connection bolt hole part is in a plastic state, but the deformation is small and does not affect the disassembly of the entire structure. Therefore, the node only needs to remove the bolts and replace the energy dissipation plate to achieve structural repair.

[0097] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and does not limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are included in the protection scope of the present invention.

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 a plurality of prefabricated beams (2), which are arranged one by one between two adjacent prefabricated columns in the same prefabricated column layer (1); The bionic column hinge (3) has a plurality of them, 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) for pre-embedded in the building foundation or at one of the ends of the prefabricated column, and at one of the connecting ends of two vertically adjacent prefabricated columns; a shank boot (32) for pre-embedded in the building foundation and at the other of the ends of the prefabricated column, and at the other of the connecting ends of two vertically adjacent prefabricated columns; the shank boot (32) is connected to the leg boot (31) via a first energy dissipation plate (6); There are a plurality of 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 pre-buried in one of the side walls of the prefabricated column or the end of the prefabricated beam (2); a shank connector (42), which is pre-buried in another 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) via a second energy dissipation plate (7); There are multiple prestressed rod groups (5), which are arranged one by one on the mutually connected thigh connecting members (41) and shank connecting members (42).

2. A self-resetting bionic steel hinge assembled RC frame structure as claimed in 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 which 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), and 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. A self-resetting bionic steel hinge assembled RC frame structure as claimed in 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 inclined groove, and 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), and the stock shoe baffles (314) constitute the oblique side of the embedded slot (310).

4. A self-resetting bionic steel hinge assembled RC frame structure as claimed in claim 3, characterized in that: The shin boot (32) comprises: The square steel tube (321) of the shank is embedded in the building foundation or in another place 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 that 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 as claimed in claim 4, characterized in that: The shin boot (32) further comprises: There are four shank shoe horizontal ring plates (323), which are arranged one by one at the bottom of the second inclined groove, and the shank shoe horizontal ring plates (323) are respectively connected to the shank shoe square steel pipe (321) and the shank shoe T-shaped side plate (322); There are four shin boot baffles (324), which are arranged on the second slanted groove along the inclined surface of the second slanted groove in a one-to-one correspondence. The shin boot baffles (324) are respectively connected to the shin boot square steel pipe (321) and the shin boot T-shaped side plate (322). The shin boot baffles (314) constitute the hypotenuse 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 connecting member (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 arranged at the 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 plate (414) is arranged 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 plate (412).

8. The self-resetting bionic steel hinge assembled RC frame structure according to claim 6, characterized in that: The shank connector (42) comprises: The shank connecting member (421) is an I-shaped structure, one end of which is arranged at another position of the prefabricated column side wall or the end of the prefabricated beam (2), and the other end is provided with two inclined grooves, and the two inclined grooves cut the other end of the shank connecting member (421) into a trapezoidal protrusion (420); The shank connecting member baffle plate (422) is distributed along the trapezoidal protrusion (420); the trapezoidal protrusion (420) is inserted into the trapezoidal groove (410), and the shank connecting member baffle plate (422) is connected to the thigh connecting member baffle plate (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) is provided at an end of the shank connector (421) away from one end of the trapezoidal protrusion (420), and the shank connector end plate (423) is used to connect the shank connector (421) to another part of the side wall of the prefabricated column or the end of the prefabricated beam (2); The shin connecting member horizontal rib plate (424) is arranged on the shin connecting member (421), one end of which is connected to the shin connecting member end plate (423), and the other end of which is connected to the shin connecting member baffle plate (422).

10. A method for assembling a self-resetting bionic steel hinge assembled RC frame structure, characterized in that: The following steps are involved: Pre-embed one of the leg boots (31) or the shank boots (32) in the building foundation, and pre-embed the other of the leg boots (31) or the shank boots (32) at the bottom of the prefabricated column, and then assemble the prefabricated column layer (1) on the building foundation by connecting the leg boots (31) and the shank boots (32); repeat the above steps to complete the assembly of one layer of prefabricated column layer (1); Embed a strand connector (41) or a shank connector (42) on one of the prefabricated columns, embed the other strand connector (41) or the shank connector (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). Similarly, assemble the other end of the prefabricated beam (2) on another adjacent prefabricated column to complete the assembly of a prefabricated beam (2), and then assemble the prestressed rod group (5) one by one on the strand connector (41) and the shank connector (42) connected to each other, and apply prestress to the prestressed rod group (5); repeat the above steps to complete the assembly of a prefabricated beam (2) corresponding to a 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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