A replaceable steel coupling beam based on a phased energy dissipation mechanism

Abstract

The present invention discloses a replaceable steel connecting beam based on a staged energy dissipation mechanism, including a replaceable unit and a non-energy dissipation unit, wherein the replaceable unit includes a steel tube concrete beam and a buckling restraint support rod. When an earthquake occurs, the steel connecting beam deforms, causing the replaceable unit to be stressed, the buckling restraint support rod to be compressed or tensile, the piston support rod to slide back and forth relative to the sleeve, and the elastic element to deform so as to provide a restoring force for the piston support rod, so that the initial position can be restored and the residual deformation can be reduced. When the earthquake is small, the force applied to the replaceable unit by the deformation of the steel connecting beam is small, and the fuse connector limits the vertical deformation of the two connecting half beams, so that the steel connecting beam maintains an elastic state. In the case of a large earthquake, the fuse connector breaks, releasing the deformation space of the steel tube concrete beam, so that the two connecting half beams slide back and forth, and the buckling restraint support rod realizes self-reset.

Description

Technical Field

[0001] The invention relates to the technical field of civil engineering structures, and in particular to a replaceable steel coupling beam based on a staged energy dissipation mechanism. Background Art

[0002] With the rapid development of social economy, high-rise buildings are increasingly widely used in my country. Reinforced concrete shear walls are an effective lateral resistance system commonly used in high-rise and super-high-rise buildings. As the first line of seismic defense for the shear wall structure system, the coupling beam dissipates a large amount of seismic energy through its own plastic deformation to protect the wall from damage. In actual projects, the span-to-height ratio of the coupling beam is often less than 2. Under the action of earthquakes, the coupling beam is prone to premature shear failure and has poor energy dissipation capacity. Therefore, it is of great significance to improve the energy dissipation capacity of the coupling beam.

[0003] In the early days, traditional coupling beams were mainly improved by changing the reinforcement method and adopting steel-concrete composite structures. However, under the action of earthquakes, although these traditional coupling beams change the damage mode of the coupling beams to a certain extent and enhance the bearing capacity and energy dissipation capacity of the structure, they themselves suffer serious damage and are difficult to repair, causing great economic losses. In view of this, domestic and foreign scholars have proposed the concept of "replaceable coupling beams" in recent years. By concentrating energy consumption and damage on the replaceable section, the replaceable section can be disassembled and replaced after the earthquake, achieving rapid functional recovery.

[0004] At present, most of the replaceable coupling beams developed at home and abroad dissipate seismic energy through the yield deformation of the metal material (mainly steel) of the replaceable section. However, since metal materials have only one yield point, when the replaceable section is designed to yield under moderate earthquakes, the connection between the shear walls will be weakened, the overall stiffness of the structure will be reduced, and the deformation of the structure will be increased; when the replaceable section is designed to yield under large earthquakes, it cannot dissipate energy under moderate earthquakes. This type of replaceable coupling beam has a single energy dissipation function and can only be used for a certain set earthquake intensity, and cannot meet the seismic capacity requirements under earthquakes exceeding this intensity. In order to meet the seismic performance design requirements of replaceable coupling beams under different earthquake intensities, it is necessary to reasonably design the replaceable sections of the replaceable coupling beams to achieve the performance goals of phased energy dissipation and improve the toughness of the replaceable coupling beams.

[0005] On the other hand, the current research on replaceable coupling beams mainly focuses on the seismic performance of the replaceable segments, while ignoring the replaceability of the replaceable segments after an earthquake. The replaceable segments are often difficult to replace due to the large residual deformation of the structure after an earthquake. How to reduce the residual deformation of the structure is the key issue in achieving rapid replacement of replaceable coupling beams after an earthquake.

[0006] Therefore, how to change the current situation in the prior art where replaceable coupling beams are difficult to replace due to large residual deformation of the structure after an earthquake has become an urgent problem to be solved by those skilled in the art. Summary of the invention

[0007] The purpose of the present invention is to provide a replaceable steel connecting beam based on a staged energy dissipation mechanism to solve the problems existing in the above-mentioned prior art, reduce the residual deformation of the replaceable connecting beam, and reduce the difficulty of replacing the replaceable connecting beam.

[0008] To achieve the above object, the present invention provides the following solution: The present invention provides a replaceable steel coupling beam based on a staged energy dissipation mechanism, comprising:

[0009] A replaceable unit, the replaceable unit comprises a steel tube concrete beam and a buckling restraint support rod, the steel tube concrete beam comprises a connecting half beam, the connecting half beam is in two sections, the two sections of the connecting half beam can be slidably connected by shear bolts, in an initial state, a fuse connector is arranged between the connecting half beam and the shear bolt, the fuse connector can limit the relative position between the connecting half beam and the shear bolt; the buckling restraint support rod comprises a piston support rod and a sleeve, the piston support rod is slidably connected to the sleeve, an elastic element is arranged in the sleeve, the elastic element is made of a superelastic material, and the reciprocating motion of the piston support rod can cause the elastic element to deform;

[0010] A non-energy consuming unit, wherein the non-energy consuming unit can be connected to the shear wall, and the number of the non-energy consuming units is two groups, and the two groups of the non-energy consuming units are arranged on both sides of the replaceable unit;

[0011] The replaceable unit is detachably connected to the non-energy consuming unit.

[0012] Preferably, a mounting hole is provided on one section of the connecting half beam, and a limiting hole is provided on the other section of the connecting half beam, wherein the limiting hole is a long hole, and the length direction of the limiting hole is parallel to the vertical plane, and the fuse connector is arranged in the limiting hole. There are two fuse connectors, and the two fuse connectors are arranged in parallel, and the fuse connector is arranged perpendicular to the length direction of the limiting hole. The limiting hole is sleeved on the outside of the mounting hole, and the shear bolt passes through the gap between the two fuse connectors and the mounting hole and is connected to the fastening element.

[0013] Preferably, the buckling restraining support rod further comprises a first movable end plate and a second movable end plate, the first movable end plate and the second movable end plate are slidably arranged in the sleeve, a stopper is arranged on the inner wall of the sleeve, the stopper is arranged between the first movable stopper and the second movable stopper, the stopper can limit the limit position of the first movable end plate and the second movable end plate, and the elastic element connects the first movable end plate and the second movable end plate;

[0014] The sleeve has a through hole, and one end of the piston support rod can extend into the sleeve through the through hole. The first movable end plate is arranged close to the through hole, and the piston support rod is slidably connected to the first movable end plate; the piston support rod includes a driving end head, and the driving end head is located between the first movable end plate and the second movable end plate, and the driving end head can drive the first movable end plate and the second movable end plate to move.

[0015] Preferably, the outer circumferential surfaces of the first movable end plate and the second movable end plate are both provided with a friction layer, the friction layer is made of a friction material, and the friction layer abuts against the inner wall of the sleeve.

[0016] Preferably, the inner wall of the sleeve has an arc-surface protrusion protruding toward the axial direction of the sleeve, and the first movable end plate and the second movable end plate can abut against the arc-surface protrusion when sliding back and forth.

[0017] Preferably, the first movable end plate and the second movable end plate are respectively connected to the elastic element by connecting bolts, and the inner wall of the sleeve has pits matching the connecting bolts.

[0018] Preferably, the buckling restraint support rod further comprises a steel tube support rod, the steel tube support rod is connected to the sleeve, and the steel tube support rod and the piston support rod are respectively located at two ends of the sleeve.

[0019] Preferably, the replaceable unit further comprises a replaceable end plate, the number of the replaceable end plates is two, the two replaceable end plates are arranged parallel to the vertical plane, the steel tube concrete beam and the buckling restraint support rod are arranged between the two replaceable end plates, the number of the steel tube concrete beams is four groups, the steel tube concrete beams are arranged parallel to the horizontal plane, the steel tube concrete beams are fixedly connected to the replaceable end plates, and the connecting line of the four groups of steel tube concrete beams is rectangular;

[0020] There are two groups of buckling restraint support rods, and the two groups of buckling restraint support rods are located between the frames surrounded by the steel tube concrete beams. The two groups of buckling restraint support rods are arranged in a cross shape, one end of the buckling restraint support rod is hinged to one of the replacement end plates, and the other end of the buckling restraint support rod is hinged to the other replacement end plate; the replacement end plate is detachably connected to the non-energy consuming unit.

[0021] Preferably, the non-energy-consuming unit includes a connecting beam and a fixed end plate, the connecting beam is connected to the shear wall, and the connecting beam is connected to the fixed end plate. There are two fixed end plates, and the two fixed end plates are arranged on both sides of the replaceable unit. The fixed end plate and the replacement end plate are connected by high-strength bolts.

[0022] Preferably, both the fixed end plate and the replacement end plate are provided with shear keys, and the fixed end plate is connected with a plurality of reinforcing ribs.

[0023] Compared with the prior art, the present invention has achieved the following technical effects: the replaceable steel connecting beam based on the staged energy dissipation mechanism of the present invention, when encountering earthquake, the steel connecting beam deforms to cause the replaceable unit to be stressed, the buckling constraint support rod is subjected to pressure or tension, the piston support rod slides back and forth relative to the sleeve, and the elastic element deforms to provide a restoring force for the piston support rod, so that the steel connecting beam can restore to its initial position and reduce residual deformation. At the same time, when a small or medium earthquake occurs, the force applied to the replaceable unit by the deformation of the steel connecting beam is small, and the fuse connector limits the vertical deformation of the two connecting half beams, so that the steel connecting beam maintains an elastic state. In the case of a large earthquake, the fuse connector breaks, releasing the deformation space of the steel tube concrete beam, so that the two connecting half beams slide back and forth, and the buckling constraint support rod realizes self-reset; in the case of a huge earthquake, the replaceable unit dissipates seismic energy through overall plastic deformation. The replaceable steel connecting beam based on the staged energy dissipation mechanism of the present invention reduces the residual deformation of the steel connecting beam based on the staged energy dissipation mechanism and reduces the difficulty of replacing the steel connecting beam. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 It is a front view schematic diagram of a replaceable steel coupling beam based on a staged energy dissipation mechanism of the present invention;

[0026] Figure 2 It is a top view schematic diagram of a replaceable steel coupling beam based on a staged energy dissipation mechanism of the present invention;

[0027] Figure 3 It is a cross-sectional schematic diagram of a replaceable unit of a replaceable steel coupling beam based on a staged energy dissipation mechanism of the present invention;

[0028] Figure 4 It is a structural schematic diagram of an articulated seat of a replaceable steel connecting beam based on a staged energy dissipation mechanism of the present invention;

[0029] Figure 5 The schematic diagram of the partial structure of the connecting half beam of the replaceable steel connecting beam based on the staged energy dissipation mechanism of the present invention is as follows Figure 1 ;

[0030] Figure 6The schematic diagram of the partial structure of the connecting half beam of the replaceable steel connecting beam based on the staged energy dissipation mechanism of the present invention is as follows Figure 2 ;

[0031] Figure 7 It is a schematic cross-sectional view of a partial structure of a buckling restraint support rod of a replaceable steel coupling beam based on a staged energy dissipation mechanism of the present invention;

[0032] Figure 8 It is a schematic diagram of the working principle of the buckling restraint support rod of the replaceable steel coupling beam based on the staged energy dissipation mechanism of the present invention in the initial state, the compression state and the tension state;

[0033] Fig. 9 It is a schematic diagram of the replaceable steel coupling beam based on the staged energy dissipation mechanism of the present invention under earthquake conditions.

[0034] Among them, 100 is a replaceable unit and 200 is a non-energy consuming unit;

[0035] 1 is a steel tube concrete beam, 101 is a connecting half beam, 102 is a shear bolt, 103 is a fuse connector, 104 is a mounting hole, 105 is a limit hole, 2 is a buckling restraint support rod, 201 is a piston support rod, 202 is a sleeve, 203 is an elastic element, 204 is a first movable end plate, 205 is a second movable end plate, 206 is a stopper, 207 is a driving end head, 208 is a friction layer, 209 is a curved protrusion, 210 is a pit, 211 is a steel tube support rod, 212 is a replacement end plate, 213 is an articulated seat, 3 is a connecting beam, 4 is a fixed end plate, 5 is a reinforcing rib, and 6 is a shear key. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] The purpose of the present invention is to provide a replaceable steel connecting beam based on a staged energy dissipation mechanism to solve the problems existing in the above-mentioned prior art, reduce the residual deformation of the replaceable connecting beam, and reduce the difficulty of replacing the replaceable connecting beam.

[0038] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0039] Please refer to Figure 1-9 ,in, Figure 1It is a schematic diagram of the main view of the replaceable steel coupling beam based on the staged energy dissipation mechanism of the present invention, Figure 2 Schematic diagram of a top view of a replaceable steel coupling beam based on a staged energy dissipation mechanism of the present invention, Figure 3 is a cross-sectional schematic diagram of a replaceable unit of a replaceable steel coupling beam based on a staged energy dissipation mechanism of the present invention, Figure 4 It is a structural schematic diagram of the articulated seat of the replaceable steel connecting beam based on the staged energy dissipation mechanism of the present invention, Figure 5 The schematic diagram of the partial structure of the connecting half beam of the replaceable steel connecting beam based on the staged energy dissipation mechanism of the present invention is as follows Figure 1 , Figure 6 The schematic diagram of the partial structure of the connecting half beam of the replaceable steel connecting beam based on the staged energy dissipation mechanism of the present invention is as follows Figure 2 , Figure 7 It is a schematic cross-sectional view of a partial structure of a buckling restraint support rod of a replaceable steel coupling beam based on a staged energy dissipation mechanism of the present invention, Figure 8 The schematic diagram is a working principle diagram of the buckling restraint support rod of the replaceable steel coupling beam based on the staged energy dissipation mechanism in the initial state, the compression state and the tension state of the present invention. Fig. 9 It is a schematic diagram of the replaceable steel coupling beam based on the staged energy dissipation mechanism of the present invention under earthquake conditions.

[0040] The present invention provides a replaceable steel coupling beam based on a staged energy dissipation mechanism, comprising a replaceable unit 100 and a non-energy dissipation unit 200, wherein the replaceable unit 100 comprises a steel tube concrete beam 1 and a buckling restraint support rod 2, the steel tube concrete beam 1 comprises a connecting half beam 101, the connecting half beam 101 has two sections, the two sections of the connecting half beam 101 can be connected by sliding using a shear bolt 102, in an initial state, a fuse connector 103 is provided between the connecting half beam 101 and the shear bolt 102, and the fuse connector 103 can limit the connection between the connecting half beam 101 and the shear bolt 1 02; the relative position between the flexure constraint support rod 2 includes a piston support rod 201 and a sleeve 202, the piston support rod 201 is slidably connected to the sleeve 202, an elastic element 203 is arranged in the sleeve 202, the elastic element 203 is made of super elastic material, and the reciprocating motion of the piston support rod 201 can cause the elastic element 203 to deform; the non-energy absorbing unit 200 can be connected to the shear wall, the number of the non-energy absorbing units 200 is two groups, and the two groups of non-energy absorbing units 200 are arranged on both sides of the replaceable unit 100; the replaceable unit 100 is detachably connected to the non-energy absorbing unit 200.

[0041] The replaceable steel connecting beam based on the phased energy dissipation mechanism of the present invention, when encountering earthquake, the deformation of the steel connecting beam causes the replaceable unit 100 to be stressed, the buckling constraint support rod 2 is subjected to pressure or tension, the piston support rod 201 slides back and forth relative to the sleeve 202, and the elastic element 203 is deformed so as to provide a restoring force for the piston support rod 201, so that the steel connecting beam can restore to its initial position and reduce residual deformation. At the same time, when a small or medium earthquake occurs, the force applied to the replaceable unit 100 by the deformation of the steel connecting beam is relatively small, and the fuse connector 103 limits the vertical deformation of the two connecting half beams 101, so that the steel connecting beam maintains an elastic state. In the case of a large earthquake, the fuse connector 103 breaks, releasing the deformation space of the steel tube concrete beam 1, so that the two connecting half beams 101 slide back and forth, and the buckling constraint support rod 2 is self-reset; in the case of a huge earthquake, the replaceable unit 100 dissipates seismic energy through overall plastic deformation. The replaceable steel coupling beam based on the staged energy dissipation mechanism of the present invention reduces the residual deformation of the steel coupling beam and reduces the difficulty of replacing the steel coupling beam based on the staged energy dissipation mechanism.

[0042] Specifically, a mounting hole 104 is provided on one section of the connecting half beam 101, and a limiting hole 105 is provided on the other section of the connecting half beam 101. Concrete is filled in other structures of the connecting half beam 101 to ensure strength. The limiting hole 105 is a long hole, and the length direction of the limiting hole 105 is parallel to the vertical plane. The fuse connector 103 is arranged in the limiting hole 105. There are two fuse connectors 103, and the two fuse connectors 103 are arranged in parallel, and the fuse connector 103 is arranged perpendicular to the length direction of the limiting hole 105. The limiting hole 105 is sleeved on the outside of the mounting hole 104, and the shear bolt 102 passes through the gap between the two fuse connectors 103 and the mounting hole 104 and is connected to the fastening element. The fastening element can be a nut. The fuse connector 103 cooperates with the side wall of the limiting hole 105 to limit the horizontal and vertical displacement of the shear bolt 102, ensuring the reliability of force transmission of the steel tube concrete beam 1. Under the action of small earthquakes and medium earthquakes, the deformation of the steel connecting beam drives the deformation of the fuse connector 103. The energy consumption of the plastic deformation of the fuse connector 103 itself keeps the steel connecting beam in an elastic state. The fuse connector 103 plays the role of a "fuse". In the case of a large earthquake, as the deformation of the replaceable connecting beam increases, the fuse connector 103 breaks to release the vertical deformation space of the steel tube concrete beam 1, and the horizontal direction is still limited. In this specific embodiment, the fuse connector 103 is made of steel bars, and the structural strength of the fuse connector 103 can be selected according to the specific working conditions to improve the flexibility and adaptability of the steel connecting beam.

[0043] More specifically, the buckling restraint support rod 2 also includes a first movable end plate 204 and a second movable end plate 205, the first movable end plate 204 and the second movable end plate 205 are slidably arranged in the sleeve 202, and a stopper 206 is arranged on the inner wall of the sleeve 202, and the stopper 206 is arranged between the first movable end plate 204 and the second movable end plate 205, and the stopper 206 can limit the limit position of the first movable end plate 204 and the second movable end plate 205, and the elastic element 203 connects the first movable end plate 204 and the second movable end plate 205. The sleeve 202 has a through hole, and one end of the piston support rod 201 can extend into the sleeve 202 through the through hole. The first movable end plate 204 is arranged near the through hole, and the piston support rod 201 is slidably connected to the first movable end plate 204. The piston support rod 201 includes a driving end 207, which is located between the first movable end plate 204 and the second movable end plate 205, and the driving end 207 can drive the first movable end plate 204 and the second movable end plate 205 to move. The steel connecting beam is deformed, the buckling constraint support rod 2 is pulled or compressed, and the piston support rod 201 slides back and forth relative to the sleeve 202, so that the driving end 207 drives the elastic element 203 to produce tensile deformation. The radial cross-sectional area of ​​the driving end 207 is larger than the through hole area of ​​the first movable end plate 204, and it is a dumbbell-shaped structure to prevent the driving end 207 from slipping off. When the piston support rod 201 is under pressure, the length of the piston support rod 201 extending into the sleeve 202 is lengthened, and the driving end head 207 pushes the second movable end plate 205 to move in the direction away from the first movable end plate 204. Under the blocking action of the block 206, the position of the first movable end plate 204 remains unchanged, thereby stretching the elastic element 203, so that the elastic element 203 provides a restoring force for the buckling constraint support rod 2; when the buckling constraint support rod 2 is subjected to tension, the driving end head 207 or drives the first movable end plate 204 to move in the direction away from the second movable end plate 205. Similarly, under the blocking action of the block 206, the position of the second movable end plate 205 remains unchanged, the elastic element 203 is stretched, and the elastic element 203 also provides a restoring force for the buckling constraint movable support rod. It should be noted here that the elastic element 203 is made of a nonlinear elastic material with large deformation capacity. When a deformation far greater than its elastic limit strain occurs under the action of an external force, the strain can automatically recover after unloading. The specific material can be shape memory alloy, prestressed steel strand or high-performance composite fiber material.

[0044] Among them, the outer peripheral surfaces of the first movable end plate 204 and the second movable end plate 205 are both provided with a friction layer 208, and the friction layer 208 is made of friction material. The friction layer 208 is against the inner wall of the sleeve 202. When the first movable end plate 204 and the second movable end plate 205 slide back and forth relative to the sleeve 202, the friction layer 208 and the inner wall of the sleeve 202 reciprocate, which can dissipate a large amount of seismic energy and has a good energy dissipation effect.

[0045] In order to further enhance the energy dissipation effect, the inner wall of the sleeve 202 has an arc-shaped protrusion 209 protruding toward the axial direction of the sleeve 202. The first movable end plate 204 and the second movable end plate 205 can both resist the arc-shaped protrusion 209 when they slide back and forth. When the piston support rod 201 drives the first movable end plate 204 and the second movable end plate 205 to reciprocate, the arc-shaped protrusion 209 cooperates with the friction layer 208 to further improve the energy dissipation capacity and enhance the energy dissipation effect of the buckling constraint support rod 2.

[0046] It should also be noted that the first movable end plate 204 and the second movable end plate 205 are respectively connected to the elastic element 203 by connecting bolts, and the inner wall of the sleeve 202 has a pit 210 that matches the connecting bolt. When the first movable end plate 204 and the second movable end plate 205 move to the axial end surface of the sleeve 202, the connecting bolt is located in the pit 210, so that the first movable end plate 204 and the second movable end plate 205 can be against the inner wall of the sleeve 202, increasing the contact area between the first movable end plate 204 and the second movable end plate 205 and the inner wall of the sleeve 202, avoiding stress concentration. At the same time, the elastic element 203 is fixed between the first movable end plate 204 and the second movable end plate 205 by connecting bolts, which is convenient for disassembly and assembly, and the pre-tightening force of the elastic element 203 can also be adjusted by the connecting bolts.

[0047] In addition, the buckling restraint support rod 2 also includes a steel tube support rod 211, which is connected to the sleeve 202. The steel tube support rod 211 and the piston support rod 201 are respectively located at both ends of the sleeve 202. The steel tube support rod 211 is provided to facilitate the connection and fixation of the buckling restraint support rod 2.

[0048] Furthermore, the replaceable unit 100 further includes a replacement end plate 212, the number of the replacement end plates 212 is two, the two replacement end plates 212 are arranged parallel to the vertical plane, the steel tube concrete beam 1 and the buckling restraint support rod 2 are arranged between the two replacement end plates 212, the number of the steel tube concrete beam 1 is four groups, the steel tube concrete beam 1 is arranged parallel to the horizontal plane, the steel tube concrete beam 1 is fixedly connected to the replacement end plate 212, and the connection line of the four groups of steel tube concrete beams 1 is rectangular; the number of the buckling restraint support rod 2 is There are two groups of buckling restraint support rods 2, which are located between the frames surrounded by the steel tube concrete beams 1. The two groups of buckling restraint support rods 2 are arranged in a cross-shaped manner, and one end of the buckling restraint support rod 2 is hinged to one of the replacement end plates 212, and the other end of the buckling restraint support rod 2 is hinged to another replacement end plate 212. In this specific embodiment, the replacement end plate 212 is connected with a hinge seat 213, which is convenient for hinge connection with the buckling restraint support rod 2; the replacement end plate 212 is detachably connected to the non-energy consuming unit 200. It should be explained here that the arrangement form and quantity of the steel tube concrete beams 1 and the buckling restraint support rods 2 can be determined according to the specific design requirements of the shear wall.

[0049] Correspondingly, the non-energy consuming unit 200 includes a connecting beam 3 and a fixed end plate 4, the connecting beam 3 is connected to the shear wall, the connecting beam 3 is connected to the fixed end plate 4, the number of the fixed end plates 4 is two, the two fixed end plates 4 are arranged on both sides of the replaceable unit 100, and the fixed end plate 4 is connected to the replacement end plate 212 by high-strength bolts. The replacement end plate 212 and the fixed end plate 4 are connected by high-strength bolts, which facilitates the connection and disassembly of the replaceable unit 100 and the non-energy consuming unit 200, and provides convenience for the subsequent disassembly and replacement of the replaceable unit 100. The connecting beam 3 can be made of steel profiles. In this specific embodiment, the connecting beam 3 is made of H-shaped steel. The connecting beam 3 is embedded in the inside of the shear wall. Studs can be set to prevent the bonding and slipping problem between the concrete of the shear wall and the connecting beam 3. The shear wall can be a reinforced concrete shear wall or a steel-concrete composite shear wall. The thickness of the web and flange plate of the H-shaped steel can be calculated according to the actual engineering to calculate the bearing capacity of the connecting beam 3.

[0050] Furthermore, both the fixed end plate 4 and the replacement end plate 212 are provided with shear keys 6 to further improve the safety factor of the steel connecting beam. In addition, the fixed end plate 4 is connected with a plurality of reinforcing ribs 5 to prevent the connecting beam 3 from buckling. The bearing capacity of the connecting beam 3 can be calculated based on the thickness of the web and flange plates of the selected H-shaped steel, thereby determining the number of reinforcing ribs 5.

[0051] The replaceable steel connecting beam based on the phased energy dissipation mechanism of the present invention is installed between the joint shear walls, and includes a replaceable unit 100 and a non-energy dissipation unit 200, which are connected by high-strength bolts. The replaceable unit 100 includes a steel tube concrete beam 1 and a buckling restraint support rod 2, the buckling restraint support rod 2 is subjected to pressure or tension, the piston support rod 201 reciprocates relative to the sleeve 202, and the elastic element 203 is stretched and deformed to provide a restoring force for the piston support rod 201, so that the steel connecting beam can return to its initial position and reduce residual deformation. When the earthquake is small, the force exerted by the deformation of the non-energy-consuming unit 200 on the replaceable unit 100 is small, and the fuse connector 103 limits the vertical deformation of the two connecting half beams 101, so that the steel connecting beam remains in an elastic state. In the case of a large earthquake, the fuse connector 103 breaks, releasing the deformation space of the steel tube concrete beam 1, so that the two connecting half beams 101 slide back and forth, and the buckling constraint support rod 2 realizes self-reset; in the case of a huge earthquake, the replaceable unit 100 dissipates the seismic energy through overall plastic deformation. The non-energy-consuming unit 200 includes a connecting beam 3 and a fixed end plate 4, the connecting beam 3 is connected to the shear wall, and the connecting beam 3 is connected to the fixed end plate 4. A shear key 6 is set on the fixed end plate 4 to improve the shear resistance of the steel connecting beam. The replaceable steel connecting beam based on the staged energy dissipation mechanism of the present invention has self-reset capability and can adapt to earthquakes of different degrees. In addition, the sleeve 202 of the present invention is provided with an arc-shaped protrusion 209, and the first movable end plate 204 and the second movable end plate 205 are provided with a friction layer 208. When the first movable end plate 204 and the second movable end plate 205 slide back and forth in the sleeve 202, a large friction force can be generated to dissipate a large amount of seismic energy, thereby enhancing the energy dissipation effect.

[0052] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A replaceable steel coupling beam based on a phased energy dissipation mechanism, characterized in that: include: A replaceable unit, the replaceable unit comprises a steel tube concrete beam and a buckling restraint support rod, the steel tube concrete beam comprises a connecting half beam, the connecting half beam is in two sections, the two sections of the connecting half beam can be slidably connected by shear bolts, in an initial state, a fuse connector is arranged between the connecting half beam and the shear bolt, the fuse connector can limit the relative position between the connecting half beam and the shear bolt; the buckling restraint support rod comprises a piston support rod and a sleeve, the piston support rod is slidably connected to the sleeve, an elastic element is arranged in the sleeve, the elastic element is made of a superelastic material, and the reciprocating motion of the piston support rod can cause the elastic element to deform; A non-energy consuming unit, wherein the non-energy consuming unit can be connected to the shear wall, and the number of the non-energy consuming units is two groups, and the two groups of the non-energy consuming units are arranged on both sides of the replaceable unit; The replaceable unit is detachably connected to the non-energy consuming unit.

2. The replaceable steel coupling beam based on the staged energy dissipation mechanism according to claim 1 is characterized in that: A mounting hole is provided on one section of the connecting half beam, and a limiting hole is provided on the other section of the connecting half beam. The limiting hole is a long hole, and the length direction of the limiting hole is parallel to the vertical plane. The fuse connector is arranged in the limiting hole. There are two fuse connectors, and the two fuse connectors are arranged in parallel, and the fuse connector is arranged perpendicular to the length direction of the limiting hole. The limiting hole is sleeved on the outside of the mounting hole, and the shear bolt passes through the gap between the two fuse connectors and the mounting hole and is connected to the fastening element.

3. The replaceable steel coupling beam based on the staged energy dissipation mechanism according to claim 1 is characterized in that: The buckling restraining support rod also includes a first movable end plate and a second movable end plate, the first movable end plate and the second movable end plate are slidably arranged in the sleeve, a stopper is arranged on the inner wall of the sleeve, the stopper is arranged between the first movable end plate and the second movable end plate, the stopper can limit the limit position of the first movable end plate and the second movable end plate, and the elastic element connects the first movable end plate and the second movable end plate; The sleeve has a through hole, and one end of the piston support rod can extend into the sleeve through the through hole. The first movable end plate is arranged close to the through hole, and the piston support rod is slidably connected to the first movable end plate; the piston support rod includes a driving end head, and the driving end head is located between the first movable end plate and the second movable end plate, and the driving end head can drive the first movable end plate and the second movable end plate to move.

4. The replaceable steel coupling beam based on the staged energy dissipation mechanism according to claim 3 is characterized in that: The outer circumferential surfaces of the first movable end plate and the second movable end plate are both provided with a friction layer, the friction layer is made of a friction material, and the friction layer abuts against the inner wall of the sleeve.

5. The replaceable steel coupling beam based on the staged energy dissipation mechanism according to claim 4 is characterized in that: The inner wall of the sleeve has an arc-surface protrusion protruding toward the axial direction of the sleeve, and the first movable end plate and the second movable end plate can both abut against the arc-surface protrusion when sliding back and forth.

6. The replaceable steel coupling beam based on the staged energy dissipation mechanism according to claim 3 is characterized in that: The first movable end plate and the second movable end plate are respectively connected to the elastic element by connecting bolts, and the inner wall of the sleeve is provided with pits matching the connecting bolts.

7. The replaceable steel coupling beam based on the staged energy dissipation mechanism according to claim 3 is characterized in that: The buckling restraint support rod also includes a steel tube support rod, the steel tube support rod is connected to the sleeve, and the steel tube support rod and the piston support rod are respectively located at two ends of the sleeve.

8. The replaceable steel coupling beam based on the staged energy dissipation mechanism according to any one of claims 1 to 7, characterized in that: The replaceable unit further includes a replacement end plate, the number of the replacement end plates is two, the two replacement end plates are arranged parallel to the vertical plane, the steel tube concrete beam and the buckling restraint support rod are arranged between the two replacement end plates, the number of the steel tube concrete beams is four groups, the steel tube concrete beams are arranged parallel to the horizontal plane, the steel tube concrete beams are fixedly connected to the replacement end plates, and the connecting line of the four groups of steel tube concrete beams is rectangular; There are two groups of buckling restraint support rods, and the two groups of buckling restraint support rods are located between the frames surrounded by the steel tube concrete beams. The two groups of buckling restraint support rods are arranged in a cross shape, one end of the buckling restraint support rod is hinged to one of the replacement end plates, and the other end of the buckling restraint support rod is hinged to the other replacement end plate; the replacement end plate is detachably connected to the non-energy consuming unit.

9. The replaceable steel coupling beam based on the staged energy dissipation mechanism according to claim 8 is characterized in that: The non-energy-consuming unit includes a connecting beam and a fixed end plate, the connecting beam is connected to the shear wall, and the connecting beam is connected to the fixed end plate. There are two fixed end plates, and the two fixed end plates are arranged on both sides of the replaceable unit. The fixed end plate and the replacement end plate are connected by high-strength bolts.

10. The replaceable steel coupling beam based on the staged energy dissipation mechanism according to claim 9 is characterized in that: The fixed end plate and the replacement end plate are both provided with shear keys, and the fixed end plate is connected with a plurality of reinforcing ribs.

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