CN116623792A - Device and method for connecting wave-starting hierarchical energy-consumption beam column nodes - Google Patents
Device and method for connecting wave-starting hierarchical energy-consumption beam column nodes Download PDFInfo
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- CN116623792A CN116623792A CN202310500701.0A CN202310500701A CN116623792A CN 116623792 A CN116623792 A CN 116623792A CN 202310500701 A CN202310500701 A CN 202310500701A CN 116623792 A CN116623792 A CN 116623792A
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- 238000005265 energy consumption Methods 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 20
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 202
- 239000010959 steel Substances 0.000 claims abstract description 202
- 239000011150 reinforced concrete Substances 0.000 claims abstract description 69
- 238000010008 shearing Methods 0.000 claims abstract description 29
- 239000004567 concrete Substances 0.000 claims description 13
- 210000001503 joint Anatomy 0.000 claims description 6
- 238000011065 in-situ storage Methods 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 238000005266 casting Methods 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 8
- 230000007246 mechanism Effects 0.000 abstract description 6
- 238000012360 testing method Methods 0.000 description 11
- 238000006073 displacement reaction Methods 0.000 description 9
- 230000003014 reinforcing effect Effects 0.000 description 6
- 230000035939 shock Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000005452 bending Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 230000008439 repair process Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 239000011440 grout Substances 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/20—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of concrete, e.g. reinforced concrete, or other stonelike material
- E04B1/21—Connections specially adapted therefor
- E04B1/215—Connections specially adapted therefor comprising metallic plates or parts
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/20—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of concrete, e.g. reinforced concrete, or other stonelike material
- E04B1/21—Connections specially adapted therefor
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
- E04B1/58—Connections for building structures in general of bar-shaped building elements
- E04B1/5825—Connections for building structures in general of bar-shaped building elements with a closed cross-section
- E04B1/5831—Connections for building structures in general of bar-shaped building elements with a closed cross-section of substantially rectangular form
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/92—Protection against other undesired influences or dangers
- E04B1/98—Protection against other undesired influences or dangers against vibrations or shocks; against mechanical destruction, e.g. by air-raids
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/20—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of concrete or other stone-like material, e.g. with reinforcements or tensioning members
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/30—Columns; Pillars; Struts
- E04C3/34—Columns; Pillars; Struts of concrete other stone-like material, with or without permanent form elements, with or without internal or external reinforcement, e.g. metal coverings
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
- E04C5/02—Reinforcing elements of metal, e.g. with non-structural coatings of low bending resistance
- E04C5/03—Reinforcing elements of metal, e.g. with non-structural coatings of low bending resistance with indentations, projections, ribs, or the like, for augmenting the adherence to the concrete
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
- E04C5/162—Connectors or means for connecting parts for reinforcements
- E04C5/163—Connectors or means for connecting parts for reinforcements the reinforcements running in one single direction
- E04C5/165—Coaxial connection by means of sleeves
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/12—Mounting of reinforcing inserts; Prestressing
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/025—Structures with concrete columns
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
- E04B1/58—Connections for building structures in general of bar-shaped building elements
- E04B2001/5875—Connections for building structures in general of bar-shaped building elements using exterior clamping plates or shells
Abstract
The invention discloses a wave starting grading energy consumption beam column node connecting device and a connecting method, wherein the device is connected between a reinforced concrete precast column and a reinforced concrete precast beam, the reinforced concrete precast column is provided with a first shearing resistant steel plate and a plurality of precast column reserved steel bars, the reinforced concrete precast beam is provided with a second shearing resistant steel plate and a plurality of precast beam reserved steel bars, and the first shearing resistant steel plate and the second shearing resistant steel plate are oppositely arranged; the wave-starting hierarchical energy-consumption beam column node connecting device comprises a connecting steel plate, a first wave-starting longitudinal rib, a second wave-starting longitudinal rib, a first low-strength steel bar, a second low-strength steel bar and stirrups, wherein the two connecting steel plates are respectively arranged on two sides of the first shearing-resistant steel plate and the second shearing-resistant steel plate, and the connecting steel plates are fixedly connected with the first shearing-resistant steel plate and the second shearing-resistant steel plate through bolts. The invention has high construction efficiency, can realize a yield mechanism of 'strong column and weak beam', can consume energy in stages, has excellent performance of resisting continuous collapse, and can be repaired after earthquake.
Description
Technical Field
The invention relates to a device and a method for connecting a wave starting hierarchical energy-consumption beam column node, and belongs to the technical field of building structures.
Background
In building structures, the frame structure is used as one of basic structural forms, and is widely applied due to the flexible arrangement characteristic. Under the action of an earthquake, a yield mechanism of a strong beam and a weak column of the reinforced concrete frame structure possibly occurs, namely, a plastic hinge occurs between a column end and a column foot, so that the structure collapses, and huge economic loss and casualties are caused. The artificial plastic hinge is one kind of method for solving the problem of 'strong beam and weak column' of the frame structure.
The wave reinforcing bar is a plastic hinge transferring method proposed in recent years. The method weakens the bearing capacity of the section by lifting the longitudinal ribs at the beam end so as to achieve the purpose of plastic hinge transfer. However, the application of the wave-starting steel bar has the defects that the bearing capacity is low in the initial stage, and the requirements of the structure on the crack width in the middle shock resistance 'small shock resistance' and the normal use limit state are difficult to meet; shearing damage is easy to occur at the weakened section of the beam member; at present, the related research results of the wave-starting steel bars do not meet the requirement of 'middle earthquake repairability' in earthquake fortification, and the energy consumption characteristics of the wave-starting steel bars under different earthquake intensities are not effectively utilized.
The prefabricated assembly type construction method has the advantages of environment friendliness, high efficiency, automation and the like. This is also one of the reasons why countries have greatly promoted the use of fabricated building applications. At present, a prefabricated assembly method is often adopted in the frame structure to realize the connection of beam column nodes. However, the fabricated structure has poor anti-seismic properties compared to the conventional cast-in-place structure, and it is difficult to concentrate damage to non-critical prefabricated components for post-earthquake repair.
Under the disaster conditions of strong shock, explosion, fire disaster and the like, the structure can be seriously damaged by local components, and the related components are quickly damaged in a short time, so that the structure is continuously collapsed. Once the structure collapses, the economic, social and life safety are extremely adversely affected, so how to improve the continuous collapse resistance of the structure is important.
Therefore, developing a node connecting device which has high construction efficiency, can realize a yield mechanism of a strong column and a weak beam, has excellent performance of energy consumption in stages and continuous collapse resistance and can be repaired after earthquake becomes a problem to be solved urgently.
Disclosure of Invention
In order to solve the problems, the invention provides the node connecting device and the node connecting method which have high construction efficiency, can realize a yield mechanism of a strong column and a weak beam, have the advantages of energy consumption in stages, excellent continuous collapse resistance and post-earthquake repair, and are used for realizing the node connection between reinforced concrete precast beams and columns.
The first object of the invention is to provide a node connecting device of a wave-starting grading energy-consuming beam column, which is connected between a reinforced concrete precast column and a reinforced concrete precast beam, wherein the reinforced concrete precast column is provided with a first shearing resistant steel plate and a plurality of precast column reserved steel bars, the reinforced concrete precast beam is provided with a second shearing resistant steel plate and a plurality of precast beam reserved steel bars, and the first shearing resistant steel plate and the second shearing resistant steel plate are oppositely arranged; the wave-starting grading energy-consumption beam column node connecting device comprises a connecting steel plate, a first wave-starting longitudinal rib, a second wave-starting longitudinal rib, a first low-strength steel bar, a second low-strength steel bar and stirrups, wherein the two connecting steel plates are respectively arranged on two sides of the first shearing-resistant steel plate and the second shearing-resistant steel plate, and the connecting steel plates are fixedly connected with the first shearing-resistant steel plate and the second shearing-resistant steel plate through bolts; the second wave starting longitudinal ribs and the first wave starting longitudinal ribs are respectively positioned on the upper side and the lower side of the connecting steel plate, one ends of the plurality of second wave starting longitudinal ribs and the plurality of first wave starting longitudinal ribs are in one-to-one butt joint with the plurality of precast column reserved reinforcing bars through the first grouting sleeve, and the other ends of the plurality of second wave starting longitudinal ribs and the plurality of precast beam reserved reinforcing bars are in one-to-one butt joint through the second grouting sleeve; the second wave starting longitudinal bars and the first wave starting longitudinal bars are respectively fixedly connected with a second low-strength steel bar and a first low-strength steel bar, and a plurality of second low-strength steel bars and first low-strength steel bars are fixedly connected through stirrups.
In one embodiment of the invention, the first shear steel plate is provided with a reserved round hole, the second shear steel plate is provided with a reserved waist-shaped hole, the connecting steel plate is provided with a reserved round hole and a reserved waist-shaped hole, the reserved round hole of the connecting steel plate corresponds to the reserved round hole of the first shear steel plate and is penetrated with a first pin bolt, a first gasket is sleeved on the first pin bolt, and the two first gaskets are respectively propped against the two connecting steel plates so as to fixedly connect the two connecting steel plates with the first shear steel plate; the reserved waist-shaped holes of the connecting steel plates correspond to the reserved waist-shaped holes of the second shear steel plates and are provided with second bolts in a penetrating mode, second gaskets are sleeved on the second bolts, and the two second gaskets are respectively abutted to the two connecting steel plates so that the two connecting steel plates are fixedly connected with the second shear steel plates.
In one embodiment of the invention, a plurality of precast column reserved steel bars are positioned on the upper side and the lower side of the first shear steel plate, and a plurality of precast beam reserved steel bars are positioned on the upper side and the lower side of the second shear steel plate and correspond to a plurality of precast column reserved steel bars one by one.
In one embodiment of the invention, the first longitudinal wave rib and the second longitudinal wave rib are respectively provided with a wave starting position which is sunken towards the connecting steel plate, two sides of the wave starting position of the first longitudinal wave rib are fixedly connected through a first low-strength steel bar, and two sides of the wave starting position of the second longitudinal wave rib are fixedly connected through a second low-strength steel bar.
In one embodiment of the invention, the first grouting sleeve and the second grouting sleeve are respectively provided with a grouting hole, and grouting is performed in the first grouting sleeve and the second grouting sleeve through the grouting holes so as to fixedly connect the first wave starting longitudinal bars and the second wave starting longitudinal bars with the reserved reinforcing bars of the precast columns and the reserved reinforcing bars of the precast beams.
In one embodiment of the invention, the first pin is positioned between the wave starting position of the first wave starting longitudinal rib close to one end of the reinforced concrete precast column and the upper and lower ends of the wave starting position of the second wave starting longitudinal rib close to one end of the reinforced concrete precast column; the second pin bolt is positioned between the wave starting position of the first wave starting longitudinal rib, which is close to one end of the reinforced concrete precast beam, and the upper end and the lower end of the wave starting position of the second wave starting longitudinal rib, which is close to one end of the reinforced concrete precast beam.
In one embodiment of the present invention, the distance between the second longitudinal rib and the reinforced concrete prefabricated column is smaller than the distance between the first longitudinal rib and the reinforced concrete prefabricated column.
In one embodiment of the invention, the first wave starting longitudinal ribs and the second wave starting longitudinal ribs are not contacted with the connecting steel plate, and the wave starting grading energy-consumption beam column node connecting device adopts concrete pouring; and the reinforced concrete precast column and the reinforced concrete precast beam are both pre-embedded with shear steel plates.
The second object of the present invention is to provide a method for connecting a node of a wave-starting and grading energy-consuming beam column, to which the device for connecting a node of a wave-starting and grading energy-consuming beam column is applied, the method comprising the following steps:
step one, embedding a first shear steel plate into a reinforced concrete precast column, and embedding a second shear steel plate into a reinforced concrete precast beam;
step two, connecting the first wave starting longitudinal bars and the second wave starting longitudinal bars with prefabricated column reserved bars through a first grouting sleeve; connecting the first wave starting longitudinal bars and the second wave starting longitudinal bars with precast beam reserved steel bars through a second grouting sleeve;
and thirdly, after the wave-starting grading energy-consuming beam column node connecting device is connected with the reinforced concrete precast column and the reinforced concrete precast beam, the wave-starting grading energy-consuming beam column node connecting device is cast in situ by adopting concrete.
In one embodiment of the invention, the concrete of the reinforced concrete precast column at the splicing position extends out of the side wall of the reinforced concrete precast column.
Advantageous effects
(1) The component, the reinforced concrete precast column and the reinforced concrete precast beam of the wave starting grading energy-consuming beam column node connecting device can be prefabricated in a factory and then sent to the site for splicing by constructors, so that the wave starting grading energy-consuming beam column node connecting device is applied to a prefabricated assembly structure and has the advantages of environment friendliness, high efficiency, automation, mechanization and the like.
(2) The invention combines the wave-starting steel bar structure welded with the low-strength steel bar with the pin bolt hinging structure, thereby weakening the bending-resistant bearing capacity of the beam end. Therefore, the yield mechanism that the plastic hinge moves to the beam end to achieve the strong column and weak beam can be realized. Meanwhile, under the small vibration effect and normal use state, the welded low-strength steel bars compensate the bending-resistant bearing capacity required in the initial stage; the shearing resistant steel plate and the encryption stirrup in the device fully solve the defect of insufficient shearing resistant bearing capacity at the bending part.
(3) Under the action of earthquake, the beam column node connection designed by the invention can consume energy in stages. The first stage is that the lower and upper ends close to the column end are disconnected by the low-strength welded steel bars, the upper and lower ends close to the column end are connected with the bolt to start rotation energy consumption; the second stage is to disconnect the lower and upper welded steel bars far away from the column end, and the upper and lower wave-starting steel bars far away from the column end start to generate deformation energy consumption, and the pin connection far away from the column end starts to rotate with the pin connection. The construction method can effectively utilize the energy consumption characteristics of the connection of the wave-starting steel bars and the bolts under different earthquake intensities.
(4) Under the disaster conditions of strong shock, explosion, fire disaster and the like, when the middle column of the frame structure suddenly fails, the wave-starting steel bars and the pin bolts in the device can be connected to generate large deformation to work together, so that a catenary mechanism is fully exerted, and the continuous collapse resistance of the frame structure is improved. The installation hole of the energy-consumption beam column node connecting device, which is far away from the pin connection of the column end, is in a long and flat waist-shaped hole shape, so that the plastic rotation capacity of the beam is further enhanced, the energy consumption is enhanced, the basic requirement of 'large earthquake-proof' anti-seismic fortification is met, and a certain guarantee is provided for human life safety under various sudden disasters.
(5) The invention can meet the earthquake fortification requirement of 'middle earthquake repairable'. Under the action of strong earthquake, the wave-starting graded energy-consuming beam column node connecting device generates damage deformation to dissipate energy, and key structures such as reinforced concrete precast columns and nodes are further protected. Therefore, the structure can be repaired by replacing the severely damaged energy consumption device after the earthquake, and a certain reference is provided for the post-earthquake repair research of the assembled frame structure.
(6) In the construction site, the shear steel plates are pre-embedded in the precast beam column components, so that the connection of the energy consumption device and the positioning of the precast beam column components are facilitated, and the precast beam column components have good operability.
Drawings
FIG. 1 is a schematic perspective view of a wave grading energy-dissipating beam-column node connection device of the present invention;
FIG. 2 is a partial exploded view of the wave-starting hierarchical energy-dissipating beam-column node connection device of the present invention;
FIG. 3 is a schematic view of the construction of the reinforced concrete precast column and the reinforced concrete precast beam of the present invention;
FIG. 4 is a schematic view of the connection of the node connection device of the wave grading energy-consuming beam column to the reinforced concrete precast column and the reinforced concrete precast beam;
FIG. 5 is a schematic view of the structure of the cast-in-place concrete of the node connecting device of the wave-starting hierarchical energy-consuming beam column of FIG. 4;
fig. 6 is a schematic view of the internal structure of fig. 5.
In the figure: 1. a wave starting grading energy consumption beam column node connecting device; 2. a reinforced concrete precast column; 3. reinforced concrete precast beams; 4. a first longitudinal wave rib; 5. a second wave-starting longitudinal rib; 6. a first low strength steel bar; 7. a second low strength steel bar; 8. a first shear steel plate; 9. a second shear steel plate; 10. connecting steel plates; 11. a first gasket; 12. a second gasket; 13. a first pin; 14. a second pin; 15. reserving a round hole; 16. reserving a waist-shaped hole; 17. stirrups; 18. a first grout sleeve; 19. a second grout sleeve; 20. grouting holes; 21. prefabricating a post reserved steel bar; 22. and reserving reinforcing steel bars for the precast beams.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the present invention, unless explicitly specified and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
The strength of the concrete in the examples described below is C40.
The detection method involved in the following examples is as follows:
the method for detecting the anti-seismic performance of the beam column joint comprises the following steps:
and (3) researching the anti-seismic performance of the beam column joint, and adopting a low-cycle reciprocating loading test. The test comprises a counter-force wall, a wave-starting graded energy-consumption beam column test piece, a support steel frame, an electrohydraulic servo control loading system and a data measuring and collecting instrument. The test piece is placed vertically as shown in fig. 6, and the test piece ground beam (precast column) is anchored on the rigid ground by two ground anchors. The horizontal actuator connected with the counterforce wall is adopted to apply low-cycle reciprocating load to the beam end far away from the column until the test piece fails, the loading adopts an equal-amplitude mixed load-displacement dual-control loading system (the loading level is determined by monotone loading), namely, the loading is controlled before the node yields, and the displacement is controlled after the node yields: the load is 12kN and 32kN, and each stage circulates once; each stage circulates 3 times when the displacement rotation angles are 17/20, 17/10, 51/20, 17/5, 17/4 and 51/10, and then the test is terminated when the load of the test piece is reduced to 85% of the peak load or the hysteresis loop is unstable.
The test piece beam end loading point, the ground beam and the two pin bolt positions are respectively provided with 1 displacement meter so as to measure the displacement of each position in the test process; and the wave starting position, the longitudinal ribs and the stirrups in the energy consumption device are respectively provided with 1 strain gauge along the length direction, the side surfaces of the shearing resistant steel plates are respectively provided with 1 strain gauge along the longitudinal direction, and the node surfaces are provided with 1 strain gauge along the diagonal direction so as to measure the stress strain at each position.
Example 1
As shown in fig. 1-6, the present embodiment provides a node connection device 1 for a wave-starting hierarchical energy-consuming beam column, which is connected between a reinforced concrete precast column 2 and a reinforced concrete precast beam 3, wherein the reinforced concrete precast column 2 is provided with a first shear steel plate 8 and a plurality of precast column reserved steel bars 21, the reinforced concrete precast beam 3 is provided with a second shear steel plate 9 and a plurality of precast beam reserved steel bars 22, and the first shear steel plate 8 and the second shear steel plate 9 are oppositely arranged; the wave starting grading energy consumption beam column node connecting device 1 comprises a connecting steel plate 10, a first wave starting longitudinal rib 4, a second wave starting longitudinal rib 5, a first low-strength steel bar 6, a second low-strength steel bar 7 and stirrups 17, wherein the two connecting steel plates 10 are respectively arranged at two sides of the first shearing resistant steel plate 8 and the second shearing resistant steel plate 9, and the connecting steel plates 10 are fixedly connected with the first shearing resistant steel plate 8 and the second shearing resistant steel plate 9 through bolts; the second wave starting longitudinal ribs 5 and the first wave starting longitudinal ribs 4 are respectively positioned on the upper side and the lower side of the connecting steel plate 10, one ends of the plurality of second wave starting longitudinal ribs 5 and the plurality of first wave starting longitudinal ribs 4 are in one-to-one butt joint with a plurality of precast column reserved steel bars 21 through first grouting sleeves 18, and the other ends of the plurality of second wave starting longitudinal ribs 5 and the plurality of first wave starting longitudinal ribs 4 are in one-to-one butt joint with a plurality of precast beam reserved steel bars 22 through second grouting sleeves 19; the second wave starting longitudinal bars 5 and the first wave starting longitudinal bars 4 are respectively and fixedly connected with a second low-strength steel bar 7 and a first low-strength steel bar 6, and a plurality of second low-strength steel bars 7 and first low-strength steel bars 6 are fixedly connected through stirrups 17.
Optionally, the first shear steel plate 8 is provided with a reserved round hole 15, the second shear steel plate 9 is provided with a reserved waist-shaped hole 16, the connecting steel plate 10 is provided with a reserved round hole 15 and a reserved waist-shaped hole 16, the reserved round hole 15 of the connecting steel plate 10 corresponds to the reserved round hole 15 of the first shear steel plate 8 and is provided with a first pin 13 in a penetrating way, the first pin 13 is sleeved with a first gasket 11, and the two first gaskets 11 are respectively abutted against the two connecting steel plates 10 so that the two connecting steel plates 10 are fixedly connected with the first shear steel plate 8; the reserved waist-shaped holes 16 of the connecting steel plates 10 correspond to the reserved waist-shaped holes 16 of the second shear steel plates 9, second bolts 14 are arranged in a penetrating mode, second gaskets 12 are sleeved on the second bolts 14, the two second gaskets 12 are respectively abutted to the two connecting steel plates 10, and therefore the two connecting steel plates 10 are fixedly connected with the second shear steel plates 9.
Optionally, protrusions are disposed at two ends of the first pin 13 and the second pin 14, the first gasket 11 abuts against the protrusions of the first pin 13, the second gasket 12 abuts against the protrusions of the second pin 14, and the gasket is fixed on the pin through the disposed protrusions.
Optionally, a plurality of precast column reserved steel bars 21 are located on the upper side and the lower side of the first shear steel plate 8, and a plurality of precast beam reserved steel bars 22 are located on the upper side and the lower side of the second shear steel plate 9 and are in one-to-one correspondence with a plurality of precast column reserved steel bars 21.
Optionally, the first longitudinal wave rib 4 and the second longitudinal wave rib 5 are both provided with a wave starting position recessed towards the connecting steel plate 10, two sides of the wave starting position of the first longitudinal wave rib 4 are fixedly connected through a first low-strength steel bar 6, and two sides of the wave starting position of the second longitudinal wave rib 5 are fixedly connected through a second low-strength steel bar 7. Optionally, the length of both the first low strength steel strip 6 and the second low strength steel strip 7 is greater than the length of the launch site. Preferably, the low-strength steel bars and the wave-starting longitudinal bars are fixedly connected through welding.
Optionally, the first grouting sleeve 18 and the second grouting sleeve 19 are provided with grouting holes 20, and grouting is performed in the first grouting sleeve 18 and the second grouting sleeve 19 through the grouting holes 20, so that the first longitudinal riser bars 4 and the second longitudinal riser bars 5 are fixedly connected with the precast column reserved steel bars 21 and the precast beam reserved steel bars 22.
Optionally, the first wave starting longitudinal ribs 4 and the second wave starting longitudinal ribs 5 are not contacted with the connecting steel plate 10, and the wave starting grading energy-consumption beam column node connecting device 1 adopts concrete pouring.
Optionally, the length of the cast-in-situ section of the first shear steel plate 8 and the second shear steel plate 9 is equal to the length of the wave-starting hierarchical energy-consumption beam column node connecting device 1.
Optionally, the second riser 5 is closer to the precast reinforced concrete column 2 than the first riser 4.
Optionally, the first pin 13 is located between the wave starting position of the first wave starting longitudinal bar 4 near one end of the reinforced concrete precast column 2 and the upper and lower ends of the wave starting position of the second wave starting longitudinal bar 5 near one end of the reinforced concrete precast column 2; the second pin 14 is located between the wave starting position of the first wave starting longitudinal bar 4 near one end of the reinforced concrete precast beam 3 and the upper and lower ends of the wave starting position of the second wave starting longitudinal bar 5 near one end of the reinforced concrete precast beam 3.
Alternatively, the connecting steel plate 10, the first shear steel plate 8 and the second shear steel plate 9 are the same in height.
Example 2
The embodiment provides a method for connecting a wave-starting hierarchical energy-consuming beam column, which is applied to the device for connecting a wave-starting hierarchical energy-consuming beam column node provided in the embodiment 1, and comprises the following steps:
step one, embedding a first shear steel plate 8 in a reinforced concrete precast column 2, and embedding a second shear steel plate 9 in a reinforced concrete precast beam 3;
step two, connecting the first wave starting longitudinal bars 4 and the second wave starting longitudinal bars 5 with prefabricated column reserved steel bars 21 through a first grouting sleeve 18; the first wave starting longitudinal bar 4 and the second wave starting longitudinal bar 5 are connected with precast beam reserved steel bars 22 through a second grouting sleeve 19;
step three, after the wave-starting grading energy-consumption beam column node connecting device 1 is connected with the reinforced concrete precast column 2 and the reinforced concrete precast beam 3 respectively, the wave-starting grading energy-consumption beam column node connecting device 1 is cast in situ by adopting concrete.
Optionally, the concrete of the reinforced concrete precast column 2 at the splicing position extends a distance, that is, the concrete of the reinforced concrete precast column 2 at the splicing position extends out of the side wall of the reinforced concrete precast column 2.
Example 3
The embodiment provides a wave-starting hierarchical energy-consumption beam column structure, and the construction method of the beam column is shown in embodiment 2, wherein:
reinforced concrete precast column: the cross-sectional dimensions of the column were 300mm x 300mm; the longitudinal bars adopt symmetrical reinforcement, and 6 HRB400 steel bars with the diameter of 14mm are configured in total; the stirrups adopt HPB300 steel bars with the diameters of 8mm, and the spacing is 100mm; the concrete at the joint of the prefabricated column and the energy consumption device stretches out by 350mm; pre-burying a shear steel plate in the prefabricated column for 100mm, extending out for 325mm, wherein the section size of the shear steel plate is 50mm multiplied by 10mm; the connecting part longitudinal bars adopt HRB400 bars with the diameter of 12mm, are anchored by 600mm and extend out by 120mm.
Reinforced concrete precast beam: the cross-sectional dimensions of the beam are 150mm x 300mm; the longitudinal bars adopt symmetrical reinforcement, and 4 HRB400 steel bars with the diameter of 12mm are respectively configured; the stirrups are HPB300 steel bars with the diameter of 8mm, the spacing is 150mm, and the stirrups at the wave starting positions are 100mm; embedding a shear steel plate in the precast beam by 100mm, extending out by 400mm, wherein the section size of the shear steel plate is 50mm multiplied by 10mm; the longitudinal ribs in the beam extend out by 120mm.
Wave starting graded energy consumption beam column connecting device: the 8 wave starting longitudinal bars adopt HRB400 steel bars with the diameter of 12mm, the wave starting positions of the second wave starting longitudinal bars 5 are 650mm and 950mm respectively from the prefabricated column, and the wave starting positions of the first wave starting longitudinal bars 4 are 725mm and 1025mm respectively from the prefabricated column; the wave starting height is 30mm, the wave starting wavelength is 120mm, Q235 steel bars with the size of 12X 5mm are welded at the wave starting position, and 50mm is welded at each side; the size of the shearing-resistant connecting steel plate is 350mm multiplied by 50mm multiplied by 5mm; the radius of the gasket is 25mm, and the thickness is 2mm; the distance between the two pins and the prefabricated column is 650mm and 950mm respectively, the radius of the pins is 5mm, and the length of the pins is 40mm; the radius of the reserved round hole is 5mm, the radius of the reserved waist-shaped hole is 5mm, and the length is 15mm.
The peak bearing capacity of the loading point, the displacement rotation angle corresponding to the peak bearing capacity and the ductility coefficient measured by the method for detecting the earthquake resistance are 34.447kN, 2.509 and 5.105 respectively.
Comparative example 1
Comparative example 1 provides a general beam-column structure, compared with example 3, the wave-starting graded energy-consuming beam-column node connecting device 1 is removed, the reinforcing bars of beam-column components are completely consistent, and a test piece is manufactured by adopting a cast-in-situ method.
The peak bearing capacity of the loading point, the displacement rotation angle corresponding to the peak bearing capacity and the ductility coefficient measured by the method for detecting the earthquake resistance are 33.875kN, 0.836 and 2.579 respectively.
From this, it can be seen that, in comparative example 1, the displacement angle and ductility coefficient corresponding to the peak load capacity of the wave-starting hierarchical energy-consuming beam-column node connecting device 1 of the present invention are far lower than those of example 3, and the displacement angle and ductility coefficient corresponding to the peak load capacity of the wave-starting hierarchical energy-consuming beam-column node connecting device 1 of the present invention are not removed, so that the wave-starting hierarchical energy-consuming beam-column node connecting device provided by the present invention has excellent anti-seismic performance.
While the invention has been described with reference to the preferred embodiments, it is not limited thereto, and various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. The wave starting grading energy consumption beam column node connecting device is characterized by being connected between a reinforced concrete precast column (2) and a reinforced concrete precast beam (3), wherein the reinforced concrete precast column (2) is provided with a first shear steel plate (8) and a plurality of precast column reserved steel bars (21), the reinforced concrete precast beam (3) is provided with a second shear steel plate (9) and a plurality of precast beam reserved steel bars (22), and the first shear steel plate (8) and the second shear steel plate (9) are oppositely arranged; the wave starting grading energy consumption beam column node connecting device (1) comprises a connecting steel plate (10), a first wave starting longitudinal rib (4), a second wave starting longitudinal rib (5), a first low-strength steel bar (6), a second low-strength steel bar (7) and stirrups (17), wherein the two connecting steel plates (10) are respectively arranged at two sides of the first shearing resistant steel plate (8) and the second shearing resistant steel plate (9), and the connecting steel plates (10) are fixedly connected with the first shearing resistant steel plate (8) and the second shearing resistant steel plate (9) through bolts; the second wave starting longitudinal ribs (5) and the first wave starting longitudinal ribs (4) are respectively positioned on the upper side and the lower side of the connecting steel plate (10), one ends of the plurality of second wave starting longitudinal ribs (5) and the plurality of first wave starting longitudinal ribs (4) are in one-to-one butt joint with a plurality of precast column reserved steel bars (21) through first grouting sleeves (18), and the other ends of the plurality of second wave starting longitudinal ribs and the plurality of precast beam reserved steel bars (22) are in one-to-one butt joint through second grouting sleeves (19); the second wave starting longitudinal bars (5) and the first wave starting longitudinal bars (4) are respectively fixedly connected with a second low-strength steel bar (7) and a first low-strength steel bar (6), and a plurality of second low-strength steel bars (7) and the first low-strength steel bars (6) are fixedly connected through stirrups (17).
2. The device for connecting the nodes of the wave-starting hierarchical energy-consuming beam column according to claim 1, wherein the first shear steel plate (8) is provided with a reserved round hole (15), the second shear steel plate (9) is provided with a reserved waist-shaped hole (16), the connecting steel plate (10) is provided with a reserved round hole (15) and a reserved waist-shaped hole (16), the reserved round hole (15) of the connecting steel plate (10) corresponds to the reserved round hole (15) of the first shear steel plate (8) and is penetrated with a first pin (13), the first pin (13) is sleeved with a first gasket (11), and the two first gaskets (11) are respectively abutted against the two connecting steel plates (10) so that the two connecting steel plates (10) are fixedly connected with the first shear steel plate (8); the reserved waist-shaped holes (16) of the connecting steel plates (10) correspond to the reserved waist-shaped holes (16) of the second shear steel plates (9) and are provided with second bolts (14) in a penetrating mode, the second bolts (14) are sleeved with second gaskets (12), and the two second gaskets (12) are respectively abutted to the two connecting steel plates (10) so that the two connecting steel plates (10) are fixedly connected with the second shear steel plates (9).
3. The wave-starting hierarchical energy-consumption beam column node connecting device according to claim 1, wherein a plurality of precast column reserved steel bars (21) are located on the upper side and the lower side of the first shear steel plate (8), and a plurality of precast beam reserved steel bars (22) are located on the upper side and the lower side of the second shear steel plate (9) and correspond to a plurality of precast column reserved steel bars (21) one by one.
4. The wave-starting hierarchical energy-consumption beam column node connecting device according to claim 2, wherein the first wave-starting longitudinal ribs (4) and the second wave-starting longitudinal ribs (5) are respectively provided with a wave-starting position which is sunken towards the connecting steel plate (10), two sides of the wave-starting position of the first wave-starting longitudinal ribs (4) are fixedly connected through first low-strength steel bars (6), and two sides of the wave-starting position of the second wave-starting longitudinal ribs (5) are fixedly connected through second low-strength steel bars (7).
5. The wave-starting hierarchical energy-consumption beam column node connecting device according to claim 1, wherein the first grouting sleeve (18) and the second grouting sleeve (19) are provided with grouting holes (20), and grouting is performed in the first grouting sleeve (18) and the second grouting sleeve (19) through the grouting holes (20) so as to fixedly connect the first wave-starting longitudinal ribs (4) and the second wave-starting longitudinal ribs (5) with the precast column reserved steel bars (21) and the precast beam reserved steel bars (22).
6. The wave-starting hierarchical energy-consumption beam column node connecting device according to claim 4, wherein the first pin (13) is located between a wave-starting position of the first wave-starting longitudinal rib (4) close to one end of the reinforced concrete precast column (2) and upper and lower ends of a wave-starting position of the second wave-starting longitudinal rib (5) close to one end of the reinforced concrete precast column (2); the second pin bolt (14) is positioned between the wave starting position of the first wave starting longitudinal rib (4) close to one end of the reinforced concrete precast beam (3) and the upper and lower ends of the wave starting position of the second wave starting longitudinal rib (5) close to one end of the reinforced concrete precast beam (3).
7. The wave-starting hierarchical energy-consuming beam-column node connecting device according to claim 1, characterized in that the distance between the second wave-starting longitudinal rib (5) and the reinforced concrete prefabricated column (2) is smaller than the distance between the first wave-starting longitudinal rib (4) and the reinforced concrete prefabricated column (2).
8. The wave-starting hierarchical energy-consumption beam column node connecting device according to claim 1, wherein the first wave-starting longitudinal ribs (4) and the second wave-starting longitudinal ribs (5) are not contacted with a connecting steel plate (10), and the wave-starting hierarchical energy-consumption beam column node connecting device (1) adopts concrete casting; the reinforced concrete precast column (2) and the reinforced concrete precast beam (3) are both pre-embedded with shear steel plates.
9. A method for connecting a wave-starting and grading energy-consuming beam column node, characterized in that the method is applied with the wave-starting and grading energy-consuming beam column node connecting device as claimed in any one of claims 1-8, and comprises the following steps:
step one, embedding a first shear steel plate (8) in a reinforced concrete precast column (2), and embedding a second shear steel plate (9) in a reinforced concrete precast beam (3);
step two, connecting the first wave starting longitudinal bars (4) and the second wave starting longitudinal bars (5) with prefabricated column reserved steel bars (21) through a first grouting sleeve (18); connecting the first wave starting longitudinal bars (4) and the second wave starting longitudinal bars (5) with precast beam reserved steel bars (22) through a second grouting sleeve (19);
step three, after the wave-starting grading energy-consumption beam column node connecting device (1) is connected with the reinforced concrete precast column (2) and the reinforced concrete precast beam (3) respectively, the wave-starting grading energy-consumption beam column node connecting device (1) is cast in situ by adopting concrete.
10. The method for connecting the nodes of the wave-starting graded energy-consuming beam column according to claim 9, wherein the concrete of the reinforced concrete precast column (2) at the splicing position extends out of the side wall of the reinforced concrete precast column (2).
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| CN117071732A (en) * | 2023-10-11 | 2023-11-17 | 湖南大学 | Self-resetting high-ductility assembled frame structure |
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