CN213682543U - Self-resetting steel frame beam-center pillar node - Google Patents
Self-resetting steel frame beam-center pillar node Download PDFInfo
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- CN213682543U CN213682543U CN202022458454.7U CN202022458454U CN213682543U CN 213682543 U CN213682543 U CN 213682543U CN 202022458454 U CN202022458454 U CN 202022458454U CN 213682543 U CN213682543 U CN 213682543U
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Abstract
The utility model provides a self-resetting steel frame beam-center pillar node, which comprises two steel beams horizontally arranged at two sides of a center pillar; a shape memory alloy bent steel plate is arranged between the flange of the steel beam and the flange of the center column, and the shape memory alloy bent steel plate is arranged on the outer side of the flange of the steel beam; one end of the shape memory alloy bent steel plate is connected with the flange of the steel beam, and the other end of the shape memory alloy bent steel plate is connected with the flange of the center pillar; the friction energy dissipaters are symmetrically arranged on two sides of a web plate of the steel beam, one end of each friction energy dissipater is connected with the steel beam, and the other end of each friction energy dissipater is connected with a flange of the middle column; the utility model realizes the self-reset function of the node by utilizing the plastic deformation of the shape memory alloy bent steel plate; the friction energy dissipater can achieve friction energy dissipation with flanges and webs of the steel beams, and the friction energy dissipater and the shape memory alloy bent steel plate generate a synergistic effect to absorb seismic energy at the node together, so that the structural ductility and the energy dissipation capacity of the steel frame beam-center column node are effectively improved, and the post-earthquake repair cost is reduced.
Description
Technical Field
The utility model belongs to the technical field of structural engineering, in particular to from steel frame roof beam-center pillar node that restores to throne.
Background
The traditional steel frame beam-center column node mainly forms a rigid node through welding, the node is easy to be subjected to brittle failure after an earthquake, the ductility and the energy consumption capability of the structure are poor, and the residual deformation is large, so that the repair after the earthquake is difficult and the cost is high; with the development of the design concept based on performance earthquake resistance, the functional requirement of improving the recoverability of the structure by controlling the residual deformation of the structure after earthquake is gradually concerned by scholars at home and abroad.
At present, a self-resetting anti-seismic structure system mainly integrates beam and column components by introducing a post-tensioned prestressing technology or a shape memory alloy material into a beam-column joint to provide a recoverable function for the structure; compared with the traditional prestressed tendons or steel strands, the Shape Memory Alloy (SMA) material has excellent superelasticity and energy consumption capacity and is gradually used for beam-column joints; but the performance of the SMA material is influenced by factors such as temperature, loading conditions, heat treatment mode and the like, so that great uncertainty is generated on the energy consumption capability and the self-resetting performance of the beam-column joint.
SUMMERY OF THE UTILITY MODEL
To the technical problem who exists among the prior art, the utility model provides a from restoring to throne steel frame roof beam-center pillar node to when solving current be used for the beam column node with the memory alloy material, the power consumption ability of beam column node and from the uncertainty of restoring to throne the performance great, the structural ductility of node and the relatively poor technical problem of power consumption ability.
In order to achieve the above purpose, the utility model adopts the technical scheme that:
the utility model provides a self-resetting steel frame beam-center post node, which comprises two steel beams, a center post, a shape memory alloy bent steel plate and two friction energy dissipaters; the two steel beams are respectively arranged on two sides of the center pillar; a shape memory alloy bent steel plate is arranged between the flange of the steel beam and the flange of the center column, and the shape memory alloy bent steel plate is arranged on the outer side of the flange of the steel beam; one end of the shape memory alloy bent steel plate is connected with the flange of the steel beam, and the other end of the shape memory alloy bent steel plate is connected with the flange of the center pillar; the two friction energy dissipaters are respectively arranged at the end parts of the two steel beams, the friction energy dissipaters are symmetrically arranged on two sides of the end part of the web plate of the steel beam, one end of each friction energy dissipater is connected with the steel beam, and the other end of each friction energy dissipater is connected with the flange of the center column.
Furthermore, the friction energy dissipater comprises a first channel steel, a second channel steel, a first connecting steel plate, a second connecting steel plate and an energy dissipation friction plate;
the first channel steel and the second channel steel are positioned between two flanges of the steel beam and symmetrically arranged on two sides of the end part of the web plate of the steel beam; the web of the first channel section steel is tightly contacted with one side of the web of the steel beam, the web of the second channel section steel is tightly contacted with the other side of the web of the steel beam, and the web of the first channel section steel, the web of the steel beam and the web of the second channel section steel are fixedly connected together through a first bolt; the flange of the first channel section steel and the flange of the second channel section steel are respectively in close contact with the flange of the steel beam and are fixedly connected together through a second bolt; energy dissipation friction plates are arranged between the contact surfaces of the first channel steel and the steel beam and between the contact surfaces of the second channel steel and the steel beam;
the first connecting steel plate is arranged between the first channel section steel and the flange of the center column, one side of the first connecting steel plate is fixedly connected with the end part of the first channel section steel, and the other side of the first connecting steel plate is fixedly connected with the flange of the center column through a third bolt; the second connecting steel plate is arranged between the second channel steel and the flange of the center column, one side of the second connecting steel plate is fixedly connected with the end part of the second channel steel, and the other side of the second connecting steel plate is fixedly connected with the flange of the center column through a third bolt.
Furthermore, oblong bolt holes are correspondingly formed in the web plate of the first groove steel, the web plate of the second groove steel, the energy consumption friction plate and the web plate of the steel beam; the axes of the oblong bolt holes are horizontally arranged, the first bolts penetrate through the oblong bolt holes in the web plate of the first channel section steel, the web plate of the second channel section steel, the energy consumption friction plates and the web plate of the steel beam, and the web plate of the first channel section steel, the web plate of the second channel section steel, the energy consumption friction plates and the web plate of the steel beam are fixedly connected together through the first bolts.
Furthermore, high-strength bolts are adopted for the first bolt, the second bolt and the third bolt.
Furthermore, the energy consumption friction plate is made of non-asbestos material.
Furthermore, the shape memory alloy bent steel plate is arranged above the upper flange or below the lower flange of the steel beam; the bending steel plate comprises a first fixing section, a first bending section, a second bending section and a second fixing section, one end of the first fixing section is fixedly connected with the flange of the middle column, the other end of the first fixing section is connected with one end of the first bending section, and the other end of the first bending section is connected with one end of the second bending section; the other end of the second bending section is connected with one end of a second fixing section, and the other end of the second fixing section is fixedly connected with the flange of the steel beam; the first bending section and the second bending section are bent towards the direction of the intersection line of the flange of the steel beam and the flange of the center pillar, and the intersection line of the first bending section and the second bending section is parallel to the intersection line of the flange of the steel beam and the flange of the center pillar.
Furthermore, the central column comprises web stiffening ribs which are symmetrically arranged on two sides of the web of the central column and are arranged between two wing edges of the central column; the web stiffening rib is arranged in parallel with the flange of the steel beam and is positioned in the same plane.
Furthermore, the steel beam is an I-shaped steel beam, and the center column is an I-shaped steel column.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model provides a self-resetting steel frame beam-center pillar node, which utilizes the superior hyperelasticity and energy consumption capability of the shape memory alloy bent steel plate by arranging the shape memory alloy bent steel plate between the flange of the steel beam and the flange of the center pillar, has better bending resistance, plays a role in strengthening the flange of the steel beam and avoids the local buckling deformation of the flanges of the steel beams at the two sides of the node; meanwhile, the self-resetting function of the node is realized by utilizing the plastic deformation of the shape memory alloy bent steel plate; the friction energy dissipaters are symmetrically arranged on two sides of the web of the steel beam, friction energy dissipation can be achieved among the friction energy dissipaters, the flange and the web of the steel beam, the friction energy dissipaters and the shape memory alloy bent steel plate generate a synergistic effect to absorb seismic energy at a node together, the member is guaranteed to have no obvious inelastic deformation, the structural ductility and energy dissipation capacity of the steel frame beam-center column node are effectively improved, residual deformation of the node is reduced, the node anti-seismic performance is high, and the structural post-seismic repair cost is reduced.
Furthermore, the friction energy dissipater is formed by combining two groove-shaped steels, a connecting steel plate and energy dissipation friction plates, the energy dissipation friction plates are arranged between the web plate and the flange of the groove-shaped steel and the web plate and the flange of the steel beam, and the friction energy dissipation of the friction energy dissipater is realized by the friction of the energy dissipation friction plates with the web plate and the flange of the steel beam, so that the structural ductility and the energy dissipation performance of the node are effectively improved, the seismic energy can be effectively absorbed, the inelastic deformation of a component is avoided, the seismic performance of the node is improved, and the repair cost of the structure after earthquake is reduced.
Furthermore, oblong bolt holes are formed among the web plate of the groove steel, the energy consumption friction plate and the web plate of the steel beam, bolts are arranged in the oblong bolt holes in a penetrating mode, and when the nodes are stressed, the bolts can generate horizontal displacement in the oblong bolt holes, so that energy consumption is achieved, and the ductility of the structure is effectively improved; the ductile rotation capacity is large, the energy consumption capacity of the friction energy dissipater is effectively improved, and the rotation capacity can be regulated and controlled; after the node ductile rotation, can change friction type bolt crowd into pressure-bearing type bolt crowd, effectively improve node strength and the ultimate bearing capacity of node, almost need not restore after the bolt slip deformation, the preparation is simple and convenient to install.
Furthermore, the bolts are high-strength bolts, so that the connection strength and the structural stability of the node are ensured, and the bearing capacity of the node is effectively improved.
Furthermore, the energy consumption friction plate is made of non-asbestos material, so that the performance is stable, and the friction noise is low; non-asbestos material friction plates are filled between the web plate of the steel beam and the web plate of the channel steel, and between the flange of the steel beam and the flange of the channel steel, and the steel beam, the energy consumption friction plates and the channel steel are combined into a friction energy dissipater through bolts, so that most of seismic energy can be consumed, the energy consumption capacity of the node is enhanced, and the stability of the energy consumption process is good.
Furthermore, the bending of the shape memory alloy bent steel plate can be used for reinforcing the flange of the steel beam, so that the local buckling deformation at the node can be avoided; meanwhile, the node can deform under the action of an earthquake, so that a large amount of earthquake capacity is absorbed, and the energy consumption capacity of the node is improved.
Furthermore, through set up the web stiffening rib at the center pillar web, improve bending resistance bearing capacity and node rotational rigidity, reduce the column flange simultaneously and warp.
To sum up, the self-resetting steel frame beam-center pillar node of the utility model is characterized in that the energy dissipation friction plate is arranged on the contact surface of the steel beam and the channel steel, and the shape memory alloy bent steel plate is arranged between the flange of the steel beam and the flange of the center pillar; the steel beam, the channel steel, the connecting steel plate and the center column are connected by high-strength bolts; friction between the energy consumption friction plate and the steel beam is utilized to realize friction energy consumption; through the coordination action of the shape memory alloy bent steel plate and the energy consumption friction plate, the seismic energy is absorbed together, the main components of the node are ensured not to have obvious inelastic deformation, and the repair cost of the structure after the earthquake can be reduced; the self-resetting of the node can be realized by utilizing the plastic deformation of the shape memory alloy bent steel plate, and the whole node has excellent structural ductility and energy consumption capability; the utility model adopts the assembly structure, the construction is convenient, the safety is higher, and the replaceability of the structural components is enhanced; meanwhile, the shape memory alloy bent steel plate has a reinforcing effect on the flange of the steel beam, so that the flange of the steel beam at a node can be effectively prevented from local buckling deformation; the utility model discloses can show the power consumption ability that improves steel frame beam column node, the power consumption friction disc adopts non-asbestos material, the stable performance, and the friction noise is little, fills the non-asbestos material of certain thickness between web and the channel-section steel, between beam flange and the channel-section steel, makes up the friction energy dissipation ware through high-strength bolt, consumes most seismic energy to strengthen the power consumption ability of node; the utility model discloses simple structure, the preparation is convenient, and the production and the manufacturing of especially adapted industrialization have higher market competition.
Drawings
Fig. 1 is a schematic structural view of a self-resetting steel frame beam-center pillar joint according to the present invention;
fig. 2 is a schematic a-a cross-sectional view of a self-resetting steel frame beam-center pillar joint according to the present invention;
fig. 3 is a schematic B-B cross-sectional view of a self-resetting steel frame beam-center pillar joint according to the present invention;
fig. 4 is a schematic view of the connection structure of the steel plate and the channel steel of the present invention.
The steel beam 1, the middle column 2, the shape memory alloy bent steel plate 3, the friction energy dissipater 4 and the web stiffening rib 5 are arranged in the steel frame; 41 first groove-shaped steel, 42 second groove-shaped steel, 43 first connecting steel plate, 44 second connecting steel plate, 45 energy consumption friction plate, 46 first bolt, 47 second bolt, 48 third bolt and 49 oblong bolt hole.
Detailed Description
In order to make the technical problem solved by the present invention, technical solution and beneficial effect are more clearly understood, and the following specific embodiments are right for the present invention to proceed further detailed description. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in the attached drawings 1-4, the utility model provides a self-resetting steel frame beam-center pillar node, which comprises two steel beams 1, a center pillar 2, a shape memory alloy bent steel plate 3 and two friction energy dissipators 4, wherein the two steel beams 1 are respectively horizontally arranged at two sides of the center pillar 2; a shape memory alloy bent steel plate 3 is arranged between the flange of each steel beam 1 and the flange of the central column 2, and the shape memory alloy bent steel plate 3 is arranged on the outer side of the flange of the steel beam 1; one end of the shape memory alloy bent steel plate 3 is connected with the flange of the steel beam 1, and the other end of the shape memory alloy bent steel plate is connected with the flange of the center column 2; the two friction energy dissipaters 4 are respectively arranged at the end parts of the two steel beams 1, one friction energy dissipater is arranged between one steel beam and the steel column, and the other friction energy dissipater is arranged between the other steel beam and the steel column; friction energy dissipation ware 4 symmetry sets up in the web tip both sides of girder steel 1, and friction energy dissipation ware 4's one end is connected with girder steel 1, and the other end is connected with the edge of a wing of center pillar 2.
The shape memory alloy bent steel plate is arranged between the flange of the steel beam and the flange of the center pillar, the shape memory alloy bent steel plate has excellent hyperelasticity and energy consumption capability, the flanges of the steel beams on two sides of the center pillar are strengthened, and the local buckling deformation of the flange of the steel beam at a node is effectively avoided; meanwhile, the self-resetting function of the node is realized by utilizing the plastic deformation of the shape memory alloy bent steel plate; the friction energy dissipaters are symmetrically arranged on two sides of the end portion of the web of the steel beam, friction energy dissipation can be achieved among the friction energy dissipaters, the flange and the web of the steel beam, the friction energy dissipaters and the bent steel plate of the shape memory alloy generate a synergistic effect to absorb seismic energy at a node together, the member is guaranteed not to have obvious inelastic deformation, the structural ductility and energy dissipation capacity of the steel frame beam-center column node are effectively improved, the node seismic performance is high, and the structural post-seismic restoration cost is reduced.
The shape memory alloy bent steel plate is arranged above the upper flange or below the lower flange of the steel beam 1 and symmetrically arranged along a web plate of the steel beam 1; one end of one of the bent steel plates is fixedly connected with the upper end of the flange of the center column 2 through a connecting bolt, and the other end of the bent steel plate is fixedly connected with the upper flange of the steel beam 1 through a connecting bolt; one end of the other bent steel plate is fixedly connected with the lower end of the flange of the center column 2 through a connecting bolt, and the other end of the other bent steel plate is fixedly connected with the lower flange of the steel beam 1 through a connecting bolt; preferably, the connecting bolt is a high-strength bolt.
The center of the bent steel plate is far away from the intersection line of the steel beam 1 and the center post 2; the bent steel plate comprises a first fixing section, a first bending section, a second bending section and a second fixing section, one end of the first fixing section is fixedly connected with the flange of the middle column 2 through a connecting bolt, the other end of the first fixing section is connected with one end of the first bending section, the other end of the first bending section is connected with one end of the second bending section, the other end of the second bending section is connected with one end of the second fixing section, and the other end of the second fixing section is fixed with the upper flange or the lower flange of the steel beam 1 through a connecting bolt; the first bending section and the second bending section are bent towards the direction of the intersection line of the flange of the steel beam 1 and the flange of the center column 2, and the intersection line of the first bending section and the second bending section is parallel to the intersection line of the flange of the steel beam 1 and the flange of the center column 2.
The friction damper 4 comprises a first channel steel 41, a second channel steel 42, a first connecting steel plate 43, a second connecting steel plate 44, a friction plate 45, a first bolt 46, a second bolt 47 and a third bolt 48; the first channel steel 31 and the second channel steel 42 are both positioned between two flanges of the steel beam 1 and symmetrically arranged on two sides of a web plate of the steel beam 1; the web of the first channel section steel 41 is in close contact with one side of the web of the steel beam 1, the upper surface of the upper flange of the first channel section steel 41 is in close contact with the lower surface of the upper flange of the steel beam 1, and the lower surface of the lower flange of the first channel section steel 41 is in close contact with the upper surface of the lower flange of the steel beam 1; the web of the second channel section steel 41 is in close contact with the other side of the web of the steel beam 1, the upper surface of the upper flange of the second channel section steel 42 is in close contact with the lower surface of the upper flange of the steel beam 1, and the lower surface of the lower flange of the second channel section steel 42 is in close contact with the upper surface of the lower flange of the steel beam 1; energy dissipation friction plates 45 are arranged between the contact surfaces of the first channel steel 41 and the second channel steel 42 and the steel beam 1, and the energy dissipation friction plates 45 comprise a first energy dissipation friction plate, a second energy dissipation friction plate and a third energy dissipation friction plate; a first energy consumption friction plate is arranged between a web plate of the first channel steel 41 or the second channel steel 42 and a web plate of the steel beam 1, a second energy consumption friction plate is arranged between an upper flange of the first channel steel 41 or the second channel steel 42 and an upper flange of the steel beam 1, and a third energy consumption friction plate is arranged between a lower flange of the first channel steel 41 or the second channel steel 42 and a lower flange of the steel beam 1; preferably, the first energy consumption friction plate, the second energy consumption friction plate and the third energy consumption friction plate are of an integrated structure.
The web plate of the first channel steel 41, the second channel steel 42, the two first energy consumption friction plates and the web plate of the steel beam 1 are correspondingly provided with oblong bolt holes 49, the axis of each oblong bolt hole 49 is horizontally arranged, the first bolts 46 sequentially penetrate through the oblong bolt holes in the web plate of the first channel steel 41, one of the first energy consumption friction plates, the web plate of the steel beam 1, the other first energy consumption friction plate and the web plate of the second channel steel 42, and the web plates of the first channel steel 41, the second channel steel 42, the two first energy consumption friction plates and the steel beam 1 are fixedly connected together through the first bolts 46.
Circular bolt holes are correspondingly formed in the upper flange of the first channel steel 41 or the second channel steel 42, one of the second energy consumption friction plates and the upper flange of the steel beam 1, a second bolt 47 sequentially penetrates through the upper flange of the first channel steel 41 or the second channel steel 42, one of the second energy consumption friction plates and the circular bolt holes in the upper flange of the steel beam 1, and the upper flange of the first channel steel 41 or the second channel steel 42, one of the second energy consumption friction plates and the upper flange of the steel beam 1 are fixedly connected together through the second bolt 47.
Circular bolt holes are correspondingly formed in the lower flange of the first channel section steel 41 or the second channel section steel 42, the other second energy consumption friction plate and the lower flange of the steel beam 1, the other second bolt 47 sequentially penetrates through the circular bolt holes in the lower flange of the first channel section steel 41 or the second channel section steel 42, the other second energy consumption friction plate and the lower flange of the steel beam 1, and the lower flange of the first channel section steel 41 or the second channel section steel 42, the other second energy consumption friction plate and the lower flange of the steel beam 1 are fixedly connected together through the other second bolt 47.
In the utility model, the energy consumption friction plate 45 is made of non-asbestos materials, the friction plate is stable in performance and low in friction noise, and the non-asbestos materials are filled between the web plate of the steel beam and the web plate of the channel steel, the flange of the steel beam and the flange of the channel steel, and the three parts are combined into a friction energy dissipater through bolts, so that most of seismic energy can be consumed, the energy consumption capacity of the node is enhanced, and the stability of the energy consumption process is good; preferably, high-strength bolts are used for the first bolts 46 and the second bolts 47.
The first connecting steel plate 43 is disposed between the first channel section 41 and the flange of the center pillar 2, one side of the first connecting steel plate 43 is fixedly connected with the first channel section 41, and the other side is fixedly connected with the flange of the center pillar 2 by the third bolt 48; the second connecting steel plate 44 is disposed between the second channel steel 42 and the flange of the center pillar 2, one side of the second connecting steel plate 44 is fixedly connected with the second channel steel 42, and the other side is fixedly connected with the flange of the center pillar 2 through a third bolt 48; preferably, the third bolt 48 is a high-strength bolt; preferably, the first connecting steel plate 43 and the first channel steel 41 are welded together or are of an integral structure, and the second connecting steel plate 44 and the second channel steel 42 are welded together or are of an integral structure; the first connecting steel plate 43 and the first channel steel 41 or the second connecting steel 44 and the second channel steel 42 are combined to form an end plate connecting piece, the end plate connecting piece is arranged at the end part of the steel beam 1, the end part connecting piece is fixedly connected with the steel beam 1 and the middle column 2 through bolts, energy dissipation friction plates are arranged on the contact surface of the end plate connecting piece and the steel beam 1, the end plate connecting piece and the energy dissipation friction plates are combined to form a friction energy dissipater, under the action of an earthquake, friction energy dissipation is generated among the energy dissipation friction plates, the end plate connecting piece and the steel beam, the absorption of the earthquake energy is realized, and the structural ductility and the energy dissipation.
In the utility model, the steel beam 1 is an I-shaped steel beam, the central column 2 is an I-shaped steel column, and the web stiffening ribs 5 are symmetrically arranged at two sides of the web of the central column 2 and are arranged between two flanges of the central column 2; the web stiffening ribs 5 are arranged at intervals up and down, and the web stiffening ribs 5 are arranged in parallel with the flanges of the steel beam 1 and are positioned in the same plane; both sides of the web stiffener 5 are welded to both flanges of the center pillar 2, and the end of the web stiffener 5 is welded to the web of the center pillar 2.
The utility model relates to a construction method from steel frame roof beam-center pillar node that restores to throne, specifically include following step:
And 3, connecting the end plate connecting piece and the steel beam through the high-strength bolt, and arranging the energy-consumption friction plate between the steel beam and the channel steel.
And 5, hoisting the connected steel beam to a mounting position, realizing the centering of bolt holes on the end plate connecting piece and bolt holes on the middle column, connecting by using high-strength bolts, and screwing the nuts.
And 6, arranging the shape memory alloy bent steel plate at the outer sides of the flanges of the center pillar and the steel beam, centering bolt holes, and connecting the shape memory alloy bent steel plate with the center pillar and the steel beam by using high-strength bolts.
Principle of operation
The steel frame beam-center column node of the utility model is provided with the channel steel and the connecting steel plate at the steel beam and center column node, the channel steel and the connecting steel plate are combined to form the end plate connecting piece, the contact surface of the end plate connecting piece and the steel beam is provided with the energy dissipation friction plate, and the combination forms the friction energy dissipater which can be used as a bearing element and an energy dissipation element; the friction energy dissipaters are symmetrically arranged on two sides of the end part of the web plate of the steel beam and are positioned between the upper flange and the lower flange of the steel beam, and friction energy dissipation can be realized among the friction energy dissipaters, the flanges of the steel beam and the web plate; the shape memory alloy bent steel plate is arranged between the flange of the steel beam and the flange of the center column, has excellent superelasticity and energy consumption capacity, improves the rotational rigidity of the node, has good bending resistance, and can effectively avoid the local buckling deformation of the flange of the steel beam at the node; meanwhile, the self-resetting function of the node is realized by utilizing the plastic deformation of the shape memory alloy bent steel plate; the friction energy dissipater and the shape memory alloy bent steel plate generate a synergistic effect to jointly absorb seismic energy at a node, so that no obvious inelastic deformation of a component is ensured, the structural ductility and the energy dissipation capacity of the steel frame beam-center pillar node are effectively improved, the node seismic performance is high, and the structural post-seismic repair cost is reduced; the utility model discloses a full bolted connection, full bolted connection form as semi-rigid node, and its rotation ability and power consumption ability are good, have avoided on-the-spot welding, realize the quick assembly connection of job site, have effectively improved node efficiency of construction.
Examples
The embodiment provides a self-resetting steel frame beam-center pillar node which comprises a center pillar, steel beams positioned on two sides of the center pillar, a shape memory alloy bent steel plate for connecting a flange of the center pillar and a flange of the steel beam, and a friction energy dissipater positioned at a web plate of the steel beam; the friction energy dissipater comprises an end plate connecting piece, an energy dissipation friction plate and a high-strength bolt, wherein the end plate connecting piece is arranged on a steel beam web plate and connected with a flange of a center column; the connecting steel plate is connected with the flanges of the center column through high-strength bolts, the channel steel is located between the two flanges of the steel beam, the inner side of the flange in the steel beam is provided with an energy consumption friction plate, and the outer sides of the upper flange and the lower flange of the steel beam are provided with the shape memory alloy bent steel plates; the high-strength bolt sequentially penetrates through the flange of the channel steel, the energy consumption friction plate, the flange of the steel beam and the shape memory alloy bent steel plate, and the flange of the channel steel, the energy consumption friction plate, the flange of the steel beam and the shape memory alloy bent steel plate are connected through the high-strength bolt.
In the embodiment, the groove steel is welded with the connecting steel plate, a web plate of the groove steel is connected with a web plate of a steel beam through a high-strength bolt, an oblong bolt hole is formed in the corresponding position of the web plate of the steel beam, and the high-strength bolt is installed in the oblong bolt hole; web stiffening ribs which are at the same horizontal height with the upper and lower flanges of the steel beam are arranged in the middle column; the shape memory alloy bent steel plate is positioned on the outer sides of the steel beam flange and the center column flange; the steel beam is an I-shaped steel beam, and the center column is an I-shaped center column; the energy consumption friction plate is made of non-asbestos materials, and the carbon fiber friction material has the advantages of stable performance, low friction noise and the like; non-asbestos materials are filled between the steel beam web plate and the channel steel and between the steel beam flange and the channel steel, and the steel beam web plate, the channel steel and the steel beam flange are combined into a friction energy dissipater through high-strength bolts, so that most of seismic energy is consumed, and the energy dissipation capacity of the node is enhanced.
In the beam-center pillar joint, the energy-consuming friction plate is arranged on the contact surface of the steel beam and the channel steel, and the shape memory alloy bent steel plate is arranged between the flange of the steel beam and the flange of the center pillar; the steel beam, the channel steel, the connecting steel plate and the center column are connected by high-strength bolts; friction between the energy consumption friction plate and the steel beam is utilized to realize friction energy consumption; through the coordination action of the shape memory alloy bent steel plate and the energy consumption friction plate, the seismic energy is absorbed together, the main components of the node are ensured not to have obvious inelastic deformation, and the repair cost of the structure after the earthquake can be reduced; the self-resetting of the node can be realized by utilizing the plastic deformation of the shape memory alloy bent steel plate, and the whole node has excellent structural ductility and energy consumption capability; the utility model adopts the assembly structure, the construction is convenient, the safety is higher, and the replaceability of the structural components is enhanced; meanwhile, the shape memory alloy bent steel plate has a reinforcing effect on the flange of the steel beam, so that the flange of the steel beam at a node can be effectively prevented from local buckling deformation; the utility model discloses can show the power consumption ability that improves steel frame beam column node, the power consumption friction disc adopts non-asbestos material, the stable performance, and the friction noise is little, fills the non-asbestos material of certain thickness between web and the channel-section steel, between beam flange and the channel-section steel, makes up the friction energy dissipation ware through high-strength bolt with the three, consumes most seismic energy to strengthen the power consumption ability of node; the utility model discloses simple structure, the preparation is convenient, and the production and the manufacturing of especially adapted industrialization have higher market competition.
The above embodiment is only one of the embodiments that can realize the technical solution of the present invention, and the scope of the present invention is not limited only by the embodiment, but also includes any variations, substitutions and other embodiments that can be easily conceived by those skilled in the art within the technical scope of the present invention.
Claims (8)
1. A self-resetting steel frame beam-center pillar node is characterized by comprising two steel beams (1), a center pillar (2), a shape memory alloy bent steel plate (3) and two friction energy dissipaters (4); the two steel beams (1) are respectively arranged on two sides of the center pillar (2); a shape memory alloy bent steel plate (3) is arranged between the flange of the steel beam (1) and the flange of the center column (2), and the shape memory alloy bent steel plate (3) is arranged on the outer side of the flange of the steel beam (1); one end of the shape memory alloy bent steel plate (3) is connected with the flange of the steel beam (1), and the other end of the shape memory alloy bent steel plate is connected with the flange of the center pillar (2); two friction energy dissipaters (4) are respectively arranged at the end parts of the two steel beams (1), the friction energy dissipaters (4) are symmetrically arranged on two sides of the end part of a web plate of the steel beam (1), one end of each friction energy dissipater (4) is connected with the steel beam (1), and the other end of each friction energy dissipater is connected with a flange of the center column (2).
2. A self-resetting steel frame beam-center pillar node according to claim 1, wherein the friction energy dissipater (4) comprises a first channel steel (41), a second channel steel (42), a first connecting steel plate (43), a second connecting steel plate (44) and an energy dissipation friction plate (45);
the first channel steel (41) and the second channel steel (42) are positioned between two flanges of the steel beam (1) and symmetrically arranged on two sides of the end part of a web plate of the steel beam (1); the web of the first channel section steel (41) is in close contact with one side of the web of the steel beam (1), the web of the second channel section steel (42) is in close contact with the other side of the web of the steel beam (1), and the web of the first channel section steel (41), the web of the steel beam (1) and the web of the second channel section steel (42) are fixedly connected together through a first bolt (46); the flange of the first channel section steel (41) and the flange of the second channel section steel (42) are respectively in close contact with the flange of the steel beam (1) and are fixedly connected together through a second bolt (47); energy dissipation friction plates (45) are arranged between the contact surfaces of the first channel steel (41) and the second channel steel (42) and the steel beam (1);
the first connecting steel plate (43) is arranged between the first channel steel (41) and the flange of the center column (2), one side of the first connecting steel plate (43) is fixedly connected with the end part of the first channel steel (41), and the other side of the first connecting steel plate is fixedly connected with the flange of the center column (2) through a third bolt (48); the second connecting steel plate (44) is arranged between the second channel steel (42) and the flange of the center column (2), one side of the second connecting steel plate (44) is fixedly connected with the end part of the second channel steel (42), and the other side of the second connecting steel plate is fixedly connected with the flange of the center column (2) through a third bolt (48).
3. The self-resetting steel frame beam-center column joint according to claim 2, wherein the web of the first channel steel (41), the web of the second channel steel (42), the energy dissipation friction plate (45) and the web of the steel beam (1) are correspondingly provided with oblong bolt holes (49); the axis of the long circular bolt hole (49) is horizontally arranged, the first bolt (46) penetrates through the long circular bolt hole (49) formed in the web plate of the first groove steel (41), the web plate of the second groove steel (42), the energy consumption friction plate (45) and the web plate of the steel beam (1), and the web plate of the first groove steel (41), the web plate of the second groove steel (42), the energy consumption friction plate (45) and the web plate of the steel beam (1) are fixedly connected together through the first bolt (46).
4. A self-resetting steel frame beam-center pillar node according to claim 2, wherein the first bolt (46), the second bolt (47) and the third bolt (48) are high-strength bolts.
5. A self-resetting steel frame beam-center pillar joint according to claim 2, wherein the energy dissipation friction plates (45) are friction plates made of non-asbestos material.
6. A self-resetting steel frame beam-center pillar node according to claim 1, wherein the shape memory alloy bent steel plate (3) is disposed above the upper flange or below the lower flange of the steel beam (1); the bent steel plate comprises a first fixing section, a first bending section, a second bending section and a second fixing section, one end of the first fixing section is fixedly connected with the flange of the middle column (2), the other end of the first fixing section is connected with one end of the first bending section, and the other end of the first bending section is connected with one end of the second bending section; the other end of the second bending section is connected with one end of a second fixing section, and the other end of the second fixing section is fixedly connected with the flange of the steel beam (1); the first bending section and the second bending section are bent towards the direction of the intersection line of the flange of the steel beam (1) and the flange of the center column (2), and the intersection line of the first bending section and the second bending section is parallel to the intersection line of the flange of the steel beam (1) and the flange of the center column (2).
7. A self-resetting steel frame beam-center pillar node according to claim 1, further comprising web stiffeners (5), wherein the web stiffeners (5) are symmetrically arranged on both sides of the web of the center pillar (2) and are placed between two flanges of the center pillar (2); the web stiffening ribs (5) are arranged in parallel with the flanges of the steel beam (1) and are positioned in the same plane.
8. A self-resetting steel frame beam-center pillar joint according to claim 1, wherein the steel beam (1) is an i-beam and the center pillar (2) is an i-column.
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| CN112144672A (en) * | 2020-10-29 | 2020-12-29 | 西安建筑科技大学 | Self-resetting steel frame beam-center pillar joint and construction method thereof |
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| CN112144672A (en) * | 2020-10-29 | 2020-12-29 | 西安建筑科技大学 | Self-resetting steel frame beam-center pillar joint and construction method thereof |
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