CN107268784B - Energy-consumption connecting assembly applied to core area of node of assembled concrete frame - Google Patents
Energy-consumption connecting assembly applied to core area of node of assembled concrete frame Download PDFInfo
- Publication number
- CN107268784B CN107268784B CN201710561269.0A CN201710561269A CN107268784B CN 107268784 B CN107268784 B CN 107268784B CN 201710561269 A CN201710561269 A CN 201710561269A CN 107268784 B CN107268784 B CN 107268784B
- Authority
- CN
- China
- Prior art keywords
- energy
- steel bar
- section
- energy consumption
- inner sleeve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Joining Of Building Structures In Genera (AREA)
Abstract
The invention provides an energy-consumption connecting assembly applied to a core area of a node of an assembled concrete frame, which is characterized in that: the energy-consuming connecting component of the core area of the assembled concrete frame node comprises an anchoring block (1), an energy-consuming bar (2) connected with the anchoring block (1), and an adjustable combined steel bar joint (3) for connecting the energy-consuming bar (2) and a longitudinal steel bar in a beam; anchor piece (1) and power consumption stick (2) pre-buried in the node core space of prefabricated frame post. The application of the energy-consuming connecting component meets the requirement of building industrialization development, and has the advantages of batch production and rapid assembly construction.
Description
Technical Field
The invention belongs to the field of constructional engineering, relates to an assembled concrete frame structure, and particularly relates to an energy-consumption connecting assembly applied to a node core area of an assembled concrete frame.
Background
In recent decades, the prefabricated concrete structure is more and more favored by engineers due to its characteristics of industrial production and prefabricated construction, and is widely used and rapidly developed. Along with the deep research of the performance-based earthquake-proof design theory, people have higher and higher requirements on structural damage control, the research and application of high-ductility energy-consuming elements are concerned more and more, the method of adding the ductility energy-consuming elements into an assembled structure is mature day by day in countries and regions such as the United states, new Zealand and Japan, and the adoption of an assembly technology and an energy-consuming and shock-absorbing technology in a structural system becomes one of the future development trends of the building industry.
The seismic performance of beam-column joint connection is a key factor for exerting the seismic capacity of the fabricated concrete frame structure. The node of the frame structure is a part with larger internal force under the action of earthquake, which is easy to generate plastic hinge, and is also the junction of prefabricated components of the prefabricated concrete frame structure, so that the connection performance is particularly important in the prefabricated concrete structure. The frame structure often needs to dissipate seismic energy by utilizing the plastic deformation of beam ends, so that the connection is beneficial to the beam ends at nodes to play a good hysteresis performance under the repeated horizontal action, thereby lightening the seismic response. In addition, the connection and installation process of the node is a key element for the installation of the fabricated concrete frame structure. In the assembly type concrete frame structure, the prefabricated parts are manufactured in a factory, and the production efficiency can be improved through assembly line construction; and the field connection installation still needs manual operation to be completed. Whether the process of node connection is convenient to operate and whether the installation process is rapid or not can generate key influence on the construction efficiency of the industrialized building.
The induced yield mechanism is a key element for ensuring the connection anti-seismic performance of the beam-column joint of the fabricated concrete frame structure. The hysteretic energy consumption of the reinforced concrete member mainly comes from the yielding of the longitudinal steel bars. Under the cast-in-place construction process, the nodes, the connection and the components are integrally formed, the reinforcing steel bars and the concrete near the nodes are continuous, so that the components and the nodes have related bearing performance, and because the nodes are stressed complexly, the strong nodes and the weak components need to adopt stricter construction requirements. In the fabricated concrete frame structure, the connection of the nodes lags behind the completion of the manufacture of the members, so that engineers can adopt special structures and high-quality energy-consumption connection at the joints, the seismic performance of the structure is fully exerted, and the seismic capacity of the structure is ensured.
Ductile Connections (DDC) used by Dywidag corporation of america apply the hysteresis dissipation principle of metallic axial stressed members in the node core region. The ductile connection structure is simple, convenient to manufacture and install, good in energy consumption effect and relatively low in manufacturing cost, is already applied to developed countries and regions such as the United states at present, and is particularly applied to large-scale prefabricated concrete structures in California earthquake regions. Tests show that the introduction of the ductile connection obviously improves the anti-seismic performance of the structure and has excellent energy consumption performance. The DDC uses the conversion block to transmit the axial force between the energy consumption rod and the longitudinal steel bar in the beam, a through hole is formed in the position, corresponding to the energy consumption rod, of the conversion block, a counter sink with an internal thread is formed in the position, corresponding to the longitudinal steel bar in the beam, of the conversion block, the outer end of the energy consumption rod is a sleeve with an internal thread, the longitudinal steel bar is fixed with the counter sink of the conversion block through the threads at first, and then a bolt penetrates through the through hole of the conversion block and is screwed into the internal thread of the sleeve at the end of the energy consumption rod.
The premise of exerting the energy consumption characteristic of the plastic hinge is to prevent the buckling of the steel bars near the plastic hinge when the steel bars are pressed. In the cast-in-place reinforced concrete frame node, when a large plastic corner occurs in a plastic hinge area at the node, the buckling of the longitudinal compressed steel bar cannot be restrained by the peripheral stirrups and the concrete when the longitudinal compressed steel bar is yielding, so that the phenomena of outer side concrete cracking, stirrup fracture, longitudinal compressed steel bar instability and the like can be caused, the bearing capacity is reduced instantly, and the plastic hinge loses the rotation capacity. The fact shows that buckling after the longitudinal steel bars which can prevent energy consumption are subjected to compressive yielding is the key for playing the energy consumption characteristic of the plastic hinge. The DDC places the steel bars in the plastic section in the core area of the column node, so that the periphery of the energy dissipation rod is in the constraint of concrete, and the instability of the steel bars in the plastic section is prevented. However, the connection of the DDC to the longitudinal reinforcement in the beam is complicated.
Meanwhile, the connection design of the fabricated concrete frame structure should be capable of coordinating errors in the manufacturing and installation processes of the components. The components of the fabricated structure are prefabricated at the factory and then assembled on site. Even if various measures are taken to ensure the dimensional accuracy of the member during the manufacturing process, the dimensional error of the member and the position error of each part (such as a steel bar) in the member are inevitable; on the other hand, in order to ensure the smooth assembly, certain gaps must be left between the components to avoid collision during the assembly process, and the existence of the gaps also causes inevitable length errors between the components during the installation process. The connection design of the assembly type concrete frame structure can ensure the reliability of force transmission and the convenience of construction and installation by conveniently coordinating the errors caused by the reasons. DDC connections do not easily eliminate longitudinal gaps between components, easily resulting in pinching of the hysteresis curve.
The Jiangsu golden concrete prefabricated assembly building development limited company provides a novel adjustable steel bar connecting sleeve which is used for the mutual connection construction of two sections of steel bars in an assembly type structure, can realize the non-slip reliable connection of the two sections of steel bars in the same axis, is suitable for the connection of the steel bars with different diameters in various occasions, and has wide application range; the sleeve is characterized in that the sleeve joint is short, and the installation of stirrups is not influenced; the appearance is small, and the concrete protective layer is not influenced; the length and the eccentricity of the steel bar can be properly adjusted; when the member is installed in place, the fine adjustment can be carried out by rotating the steel bar joint so as to adapt to the installation precision of the prefabricated member; the connection quality is reliable and stable; the joint connection can realize no clearance slippage when the reinforcing steel bar is pressed and pulled, the stress is reliable, and the requirement of a first-level joint can be met.
Against the background, the invention provides an energy-consumption connecting assembly applied to a core area of a node of an assembled concrete frame, which is used for connecting longitudinal steel bars at the end part of a precast beam, anchoring the longitudinal steel bars in the core area of a column and bearing and transmitting repeated axial force of the upper side edge and/or the lower side edge caused by bending moment of the end of the frame beam under the action of an earthquake; the energy consumption rod is restrained by the dense concrete in the peripheral node area when being pressed, and buckling with large amplitude can not occur even if the energy consumption rod is pressed to yield. When the earthquake happens slightly, the core energy consumption rods arranged in the node core area keep elasticity, and bending rigidity is provided for beam-column connection; when the earthquake occurs in a medium or large earthquake, the energy consumption rod is pulled or pressed to yield, and the hysteresis characteristic is utilized to dissipate the earthquake energy, so that the dynamic response of the structure is reduced. The energy consumption rod has the characteristics that the energy consumption rod can exert stable ductile energy consumption performance, and the shock resistance of the structure is improved. Compared with DDC, the invention has the advantages of simple connection, convenient construction error adjustment, convenient construction and the like.
Disclosure of Invention
The technical problem is as follows: the prefabricated assembled concrete frame structure is an important structural form suitable for industrial building construction. The frame beam column node is not only an intersection point of the member and a main operation part for field installation, but also an area where a large internal force occurs under the earthquake of the member, and is easy to generate plastic deformation and dissipate earthquake energy. Therefore, how to adopt a connection mode which is convenient for connection construction and can coordinate installation errors in a node area, how to utilize a yield induction mechanism to control the position where damage and energy consumption occur and ensure the energy consumption capability of the structure, and how to avoid buckling of an energy consumption component which generates plastic deformation when being pressed is a key technical problem for ensuring the anti-seismic performance and the constructability of the fabricated concrete frame structure.
The technical scheme is as follows: in order to solve the technical problems, the invention provides an energy-consuming connecting component applied to a core area of a node of an assembled concrete frame,
the energy-consuming connecting component of the core area of the assembled concrete frame node comprises an anchoring block, an energy-consuming bar connected with the anchoring block and an adjustable combined steel bar joint for connecting the energy-consuming bar and a longitudinal steel bar in a beam; the anchor block and the energy consumption rod are pre-embedded in a node core area of the prefabricated frame column.
The energy-consumption connecting component is made of metal materials such as steel. The energy dissipation rod is firmly connected with the anchoring block through welding or threaded connection and the like, and the energy dissipation rod is firmly connected with the longitudinal steel bars in the beam through adjustable combined steel bar joints to form a continuous force transmission assembly.
The energy consumption rod is sequentially divided into an inner side connecting section, an inner side transition section, an energy consumption section, an outer side transition section and an outer side connecting section along the length direction; the sectional areas of the inner side connecting section and the outer side connecting section are larger than the sectional area of the energy consumption section; the energy consumption section is in gentle transition with the inner side connecting section and the outer side connecting section to form an inner side transition section and an outer side transition section respectively; the end part section of the outer side connecting section is provided with an external thread.
Preferably, the surface of the energy consumption section of the energy consumption rod is wrapped by the non-adhesive material.
The adjustable combined steel bar joint comprises an outer sleeve, a first inner sleeve and a second inner sleeve which are arranged in the outer sleeve, and a joint cap which is abutted against the second inner sleeve;
the end part of one end of the outer sleeve is provided with an equal-diameter reducing opening with the diameter larger than the nominal diameter of the outer side connecting section of the energy consumption rod, and the inner wall of the section at the other end is provided with an internal thread; the outer diameter of the first inner sleeve is larger than the diameter of the constant-diameter reducing opening of the outer sleeve but smaller than the inner diameter of the outer sleeve, a central countersunk hole is formed in one end of the first inner sleeve, internal threads are machined in the inner wall of the central countersunk hole, and a guide head is arranged at the other end of the first inner sleeve and can be arranged in a hemispherical or conical form; the central hole of the second inner sleeve is a through hole, the diameter of the through hole is slightly larger than the maximum diameter of the first inner sleeve guide head, the inner wall of the through hole is provided with an internal thread, and the wall of one end of the second inner sleeve is provided with an external thread; the helmet is provided with a central through hole, and the inner wall of the central through hole is provided with an internal thread;
the end part of the outer connecting section of the connected energy consumption rod passes through the constant-diameter reducing opening, and the outer thread of the energy consumption rod is matched and screwed with the inner thread of the countersunk hole of the first inner sleeve; the internal thread of the outer sleeve is matched and screwed with the external thread arranged on the wall of the second inner sleeve; the end section of the longitudinal steel bar in the connected beam is provided with an external thread, and the external thread is matched and screwed with the internal thread on the inner wall of the second inner sleeve; and the internal thread of the cap is matched and screwed with the external thread at the end part of the longitudinal steel bar in the beam, and the cap is screwed at the tail end of the second inner sleeve.
The energy-consumption connecting component applied to the core area of the node of the fabricated concrete frame is characterized in that an anchoring block of the energy-consumption connecting component is connected with an energy-consumption rod and then embedded in the core area of the node of the column, the anchoring block is aligned with longitudinal steel bars in the beam after the beam and the column are connected, and the end part of a connecting section on the outer side of the energy-consumption rod does not protrude out of the surface of concrete of the column; column concrete near the outer side connecting section of the energy consumption bar is provided with a column side gap for connection construction between the energy consumption bar and the longitudinal steel bars in the beam, a beam end rabbet with enough length is also required to be reserved near the end part of the longitudinal steel bars in the beam to ensure the operation space of the adjustable combined steel bar joint, and the gap and the rabbet are filled with post-cast concrete after connection and installation are finished.
Has the beneficial effects that: 1) The structure damage is concentrated, and the energy consumption performance is good. In the invention, through reasonable design, the yield bearing capacity of the energy consumption section of the energy consumption rod under the action of the axial force is smaller than the yield bearing capacity and the anchoring bearing capacity of the longitudinal steel bar in the connected beam, and is also smaller than the yield bearing capacity of the inner side connecting section and the outer side connecting section of the core energy consumption rod and the connecting bearing capacity between the two ends and the anchoring block and the longitudinal steel bar in the beam, so that the yield is only generated in the energy consumption section of the energy consumption rod. Because the energy consumption rod which is easy to yield is arranged in the node core area, the energy consumption rod can absorb and consume the energy of the earthquake input structure under the action of an earthquake, and the earthquake response is reduced under the condition that the beams and columns of the main bearing components are not excessively deformed or damaged.
2) The yield-inducing mechanism can be effectively realized. The energy consumption rod is arranged in the node core area, the tensile-compression yield bearing capacity of the energy consumption rod is lower than that of other component parts under the condition of reasonable design, and the energy consumption rod can be induced to yield in a specified area by weakening the section in the energy consumption section of the energy consumption rod, so that under the action of an earthquake, the energy consumption rod can yield and consume energy before other components and parts of the frame, a yield induction mechanism is formed, and therefore, the situation that the yield is only possible to occur in the energy consumption rod under the condition of a strong earthquake, only the energy consumption section of the energy consumption rod is possible to generate plastic deformation, and the rest parts can be guaranteed to be in a state of no damage or negligible damage can be guaranteed. The energy dissipation section has a certain length, and preferably, the surface of the energy dissipation section is provided with a non-adhesive layer, so that when plastic deformation is generated, similar plastic strain is generated in the range of the energy dissipation section, and the average strain in the energy dissipation section under the plastic deformation is lower, thereby being beneficial to exerting the low cycle fatigue capability of the metal material.
3) Buckling instability which possibly occurs after the energy dissipation rod is axially pressed to be buckled can be effectively avoided. The energy consumption rod is embedded in the range of the node area, is restrained by surrounding dense concrete from top to bottom and from left to right, and has enough concrete to restrain the lateral deformation of the energy consumption rod no matter which direction the energy consumption rod has a potential buckling tendency. Therefore, the energy consumption rod cannot generate large buckling deformation when being pressed, and the energy consumption rod can generate full-section yielding distributed in the energy consumption section as when being pulled when being pressed. As the yield is only limited to occur in the energy consumption section of the energy consumption rod, the longitudinal steel bar of the beam keeps an elastic state, the steel bar buckling and the damage form of concrete collapse of the protective layer, which are the same as those of the common reinforced concrete plastic hinge, can not occur, and the bearing capacity of the section can be favorably kept not to be reduced when the plastic hinge angle is larger.
4) The installation is convenient and can reliably transmit the pulling force and the pressure. The beams, columns and related components of the fabricated concrete frame structure are manufactured separately in a factory and installed in sequence on site. If the size of the component is greater than or exactly equal to the size of the component mounting space, it will cause difficulty in mounting the component. Therefore, in order to facilitate the installation of the components, the size of the components should be slightly smaller than the size of the installation space of the components, which results in a gap between the components after the installation is completed. Threaded sleeve connections can eliminate gaps between components, but the small gaps that exist between the threads at the end of the energy dissipating bar/rebar and the internal threads of the sleeve can still result in slippage when longitudinal forces are transmitted. This slippage causes a reduction in stiffness when the connection is stressed, which is very detrimental to the energy consuming connection in the core region of the node which is subjected to axial tension or pressure. The energy-consuming bar and the anchoring steel bar in the beam are connected into a whole by the connecting sleeve of the adjustable combined steel bar joint, so that the gap between the energy-consuming bar and the steel bar can be conveniently adjusted, and the beam and the column are connected into an organic whole by the telescopic characteristic of the sleeve in the installation process; after the adjustable combined steel bar joint is installed and all the threads are screwed, the end part of the second inner sleeve and the end part of the first inner sleeve guide head are abutted, the end part of the outer sleeve isodiametric necking step is abutted with the end part of the first inner sleeve countersunk hole, and the external thread of the external connecting section of the energy consumption rod is abutted against the thread of the internal thread of the first inner sleeve at one side and the thread of the external thread of the outer sleeve is abutted against the thread of the external thread of the second inner sleeve at the other side; meanwhile, the cap tightly supports the end part of the second inner sleeve, and the thread of the internal thread of the second inner sleeve abuts against the thread of the end part thread of the longitudinal steel bar in the beam on one side, and the thread of the internal thread of the cap abuts against the thread of the end part thread of the longitudinal steel bar in the beam on the other side, so that the tensile force and the pressure of the energy consumption rod are transmitted through the compression surfaces which are tightly abutted between the components, the connection does not slide in the process of transmitting the tensile force and the pressure, the influence of the thread clearance on the force transmission is eliminated, and the effectiveness and the reliability of a node force transmission system are ensured.
5) The method has strong adaptability to the installation tolerance between the components. The adjustable combined steel bar joint is adopted to connect the stressed steel bar and the energy consumption bar, the sleeve joint is short, the installation of the stirrup is not influenced, and the concrete protective layer is not influenced due to small appearance; meanwhile, the length and the eccentricity of the steel bar can be properly adjusted by the adjustable characteristic of the steel bar joint, the prefabricated column and the beam can be finely adjusted by rotating the steel bar joint when being installed in place, the installation precision of the component is improved, material variation and stress cannot be generated, and the reliable and stable connection quality is ensured.
6) The practicability is strong, and the appearance is not influenced. This power consumption coupling assembling arranges in node core area, and power consumption stick is direct with the biography power of beam column to pouring concrete behind the surplus to reserving operating space after the installation finishes and making the structure become one, the outward appearance of roof beam is unanimous with cast-in-place frame roof beam, accords with traditional aesthetic feeling.
Drawings
FIG. 1 is a schematic view of an energy dissipating connection assembly applied to a core region of a fabricated concrete frame node;
FIG. 2 is a schematic view of an energy dissipating bar used in an energy dissipating connection assembly in a core region of a node of an assembled concrete frame;
FIG. 3 is a schematic view of an adjustable modular rebar junction in an energy dissipating connection assembly for use in a core region of a node of an assembled concrete frame;
fig. 4 is a schematic diagram illustrating a pressure transmission mechanism of an adjustable combined steel bar joint applied to an energy consumption connection assembly in a core region of a node of an assembled concrete frame;
FIG. 5 is a schematic diagram of a tension transfer mechanism of an adjustable composite rebar junction in an energy dissipating connection assembly applied to a core region of a node of an assembled concrete frame;
the figure shows that: the energy dissipation device comprises an anchoring block 1, an energy dissipation rod 2, an inner connecting section 21, an inner transition section 22, an energy dissipation section 23, an outer transition section 24 and an outer connecting section 25; outboard connecting section end external threads 251; the adjustable combined reinforcing steel bar joint 3, an outer sleeve 31, an equal-diameter reducing opening 311, an outer sleeve internal thread 312, a first inner sleeve 32, a first inner sleeve internal thread 321, a guide head 322, a second inner sleeve 33, a second inner sleeve internal thread 331, a second inner sleeve external thread 332, a combined cap 34 and a combined cap internal thread 341; longitudinal steel bars 4 in the beam, and external threads 41 at the end part of the longitudinal steel bars in the beam; the concrete is characterized by comprising non-binding materials 5, column side notches 6, beam end tongue-and-groove 7 and post-cast concrete 8.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
The invention provides an energy-consuming connecting component applied to a core area of a node of an assembled concrete frame,
the energy-consuming connecting component of the core area of the assembled concrete frame node comprises an anchoring block 1, an energy-consuming bar 2 connected with the anchoring block 1, and an adjustable combined steel bar joint 3 connected with the energy-consuming bar 2 and a longitudinal steel bar in a beam; anchor piece 1 and power consumption stick 2 pre-buried in the node core space of prefabricated frame post.
The energy-consumption connecting component is made of metal materials such as steel. The energy dissipation rod 2 is firmly connected with the anchoring block 1 through welding or threaded connection and the like, and the energy dissipation rod 2 is firmly connected with the longitudinal steel bar 4 in the beam through the adjustable combined steel bar joint 3 to form a continuous force transmission assembly.
The energy consumption rod 2 is sequentially divided into an inner connecting section 21, an inner transition section 22, an energy consumption section 23, an outer transition section 24 and an outer connecting section 25 along the length direction; the sectional areas of the inner connecting section 21 and the outer connecting section 25 are larger than the sectional area of the energy consumption section 23; the energy consumption section 23 is in smooth transition with the inner side connecting section 21 and the outer side connecting section 25 to form an inner side transition section 22 and an outer side transition section 24 respectively; the end section of the outer connecting section 25 is provided with an external thread 251.
The surface of the energy consumption section 23 of the energy consumption rod 2 is wrapped by the non-adhesive material 5.
The adjustable combined steel bar joint 3 comprises an outer sleeve 31, a first inner sleeve 32 and a second inner sleeve 33 which are arranged inside the outer sleeve, and a combining cap 34 which is abutted against the second inner sleeve 33;
the end part of one end of the outer sleeve 31 is provided with an equal-diameter reducing opening 311 with the diameter larger than the nominal diameter of the outer connecting section 25 of the energy consumption rod 2, and the inner wall of the section of the other end is provided with an internal thread 312; the outer diameter of the first inner sleeve 32 is larger than the diameter of the constant-diameter reducing opening 311 of the outer sleeve 31 but smaller than the inner diameter of the outer sleeve 31, a central countersunk hole is formed at one end of the first inner sleeve 32, internal threads 321 are processed on the inner wall of the central countersunk hole, a guide head 322 is arranged at the other end of the first inner sleeve 32, and the guide head 322 can be in a hemispherical or conical form; the central hole of the second inner sleeve 33 is a through hole, the diameter of the through hole is slightly larger than the maximum diameter of the guide head 322 of the first inner sleeve 32, the inner wall of the through hole is provided with an internal thread 331, and the cylinder wall of one end of the second inner sleeve is provided with an external thread 332; the combining cap 34 is provided with a central through hole, and the inner wall of the central through hole is provided with an internal thread 341;
the end part of the outer connecting section 25 of the connected energy consumption rod 2 passes through the constant diameter reducing opening 311, and the outer thread 251 of the end part is matched and screwed with the inner thread 321 of the countersunk hole of the first inner sleeve 32; the internal thread 312 of the outer sleeve 31 is matched and screwed with the external thread 332 arranged on the cylinder wall of the second inner sleeve 33; the end section of the longitudinal steel bar 4 in the connected beam is provided with an external thread 41, and the external thread 41 is matched and screwed with the internal thread 331 on the inner wall of the second inner sleeve 33; the internal thread 341 of the cap 34 is matched and screwed with the external thread 41 at the end part of the longitudinal steel bar 4 in the beam, and the cap 34 is screwed at the tail end of the second inner sleeve 33.
The energy-consumption connecting component applied to the core area of the assembled concrete frame node is characterized in that an anchoring block 1 and an energy-consumption rod 2 are connected and then embedded in the core area of the column node, the anchoring block is aligned with a longitudinal steel bar 4 in a beam after the beam-column connection is finished, and the end part of a connecting section 25 on the outer side of the energy-consumption rod 2 does not protrude out of the surface of column concrete; column side gaps 6 are reserved in column concrete near the outer side connecting sections 25 of the energy consumption rods 2 to carry out connection construction between the energy consumption rods 2 and the longitudinal steel bars 4 in the beams, beam end grooves and tongues 7 with enough length are reserved near the end portions of the longitudinal steel bars in the beams to ensure operation space of the adjustable combined steel bar joints 3, and the gaps 6 and the grooves and tongues 7 are filled with post-cast concrete 8 after connection and installation are finished.
The following describes a specific embodiment of the present invention by taking an example of an embodiment of the present invention.
The invention provides an energy-consumption connecting assembly applied to a core area of a node of an assembled concrete frame, which is to be arranged at a position corresponding to the height of longitudinal steel bars on the upper side and/or the lower side of a beam in the core area of the node of the beam column of the assembled concrete frame. In this specification, the energy dissipation assembly installed at the height corresponding to the reinforcing steel bar on the upper side of the beam in the node core area is taken as an example for explanation. In this example, the left side of the beam is the column, and the area of the column within the beam height range is the column node area.
1) Prefabricated component
In the member prefabricating stage, the anchoring block 1 is firmly connected with the inner side connecting section 21 of the energy consumption rod 2 through welding or threaded connection and the like, the surface of the energy consumption section 23 of the energy consumption rod 2 is wrapped by the non-adhesive material 5, the anchoring block 1 and the energy consumption rod 2 are embedded in the node core area and are aligned with the axis of the longitudinal steel bar 4 in the back beam after connection is completed, the end part of the outer side connecting section 25 does not protrude out of the surface of the column concrete, and a column side notch 6 is reserved near the outer side connecting section 25. Meanwhile, beam end tongue-and-groove 7 is reserved near the height of the longitudinal steel bar in the beam at the beam end, the end part of the longitudinal steel bar 4 in the beam extends into the gap 7 at the beam end, and threads 41 are formed on the surface of the extending section of the longitudinal steel bar in the beam.
And after the pre-embedding is finished, respectively pouring beam concrete and column concrete, and manufacturing a prefabricated part. The outer sleeve 31 is sleeved on the outer connecting section 25 of the energy consumption bar 2, and the union cap 34 and the second inner sleeve 33 are screwed into the end threads 41 of the longitudinal steel bars 4 in the beam in sequence.
2) Beam column mounting
When the energy-consumption rod is installed on site, the prefabricated beam column is hoisted in place, and the height and the horizontal position of the beam are adjusted to enable the centroid of the section of the energy-consumption rod 2 and the centroid of the longitudinal steel bar 4 in the beam to be aligned with each other. Meanwhile, the first inner sleeve 32 is screwed and tightened on the outer connecting section 25 of the energy consumption bar 2.
3) Connection of energy-consuming bar and longitudinal steel bar in beam
The outside connecting section 25 of the energy consumption rod is connected with the longitudinal steel bar thread section 41 in the beam through the adjustable combined steel bar joint 3 and is screwed and fixed through the thread on the surface of the component, and the specific process comprises the following steps: the second inner sleeve 33 is screwed to the first inner sleeve 32 and is tightly propped, and when a slight error exists between the energy consumption rod 2 and the axis of the longitudinal steel bar 4 in the beam, the longitudinal steel bar in the beam is slightly bent to adapt to the error due to the guiding effect between the guiding head 322 and the second inner sleeve 33; pulling out the outer sleeve 31, screwing the outer sleeve internal thread 312 into the external thread 332 of the second inner sleeve, and ensuring that the end part of the first inner sleeve 32 is clamped and screwed by the constant-diameter reducing step of the outer sleeve 31; the union cap 34 is screwed towards the second inner sleeve 33 and tightened. The connection can ensure that no gap exists between the longitudinal steel bars 4 and the energy consumption rods 2 in the beam.
4) Filling post-pouring space
The remaining space of the beam-end tongue-and-groove 7 and the column-side notch 6 is filled with post-cast concrete 8.
Under the action of earthquake, the energy consumption rod 2 yields before other components and parts and dissipates the earthquake energy by utilizing the hysteresis characteristic. The energy consumption connecting assembly is used for connecting prefabricated beam columns of an assembled concrete frame structure, can induce the plastic damage of the structure to be concentrated in the energy consumption rod under medium and large earthquakes, and avoids the damage of beam column members while improving the ductility of the structure and the earthquake resistance of the structure; the energy dissipation bar is embedded in the concrete in the core area of the node, so that the generation of large-amplitude buckling during compression can be effectively avoided. The adjustable combined steel bar joint is reliable in connection, can slide without gaps when being pulled and pressed, ensures the exertion of hysteresis performance of the energy consumption bar, is convenient to construct and can adapt to construction errors. The application of the energy-consuming connecting component meets the requirement of building industrialization development, and has the advantages of batch production and rapid assembly construction.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, and those skilled in the art will be able to make various changes and modifications to the embodiments without departing from the spirit of the invention.
Claims (4)
1. The utility model provides a be applied to energy consumption coupling assembling in assembled concrete frame node core district which characterized in that:
the energy-consumption connecting component of the core area of the assembly type concrete frame node comprises an anchoring block (1) pre-embedded in a prefabricated frame column, an energy-consumption rod (2) connected with the anchoring block (1), and an adjustable combined steel bar connector (3) for connecting the energy-consumption rod (2) and a longitudinal steel bar in a beam; the anchoring block (1) and the energy consumption rod (2) are pre-embedded in a node core area of the prefabricated frame column;
the energy-consuming connecting assembly is made of metal materials, the energy-consuming bar (2) is firmly connected with the anchoring block (1) in a welding or threaded connection mode, and the energy-consuming bar (2) is firmly connected with the longitudinal steel bar (4) in the beam through the adjustable combined steel bar connector (3) to form a continuous force transmission assembly.
2. The energy dissipating connection assembly as set forth in claim 1 applied to a core region of a fabricated concrete frame node, wherein: the energy consumption rod (2) is sequentially divided into an inner side connecting section (21), an inner side transition section (22), an energy consumption section (23), an outer side transition section (24) and an outer side connecting section (25) along the length direction; the cross sections in the energy consumption sections (23) are the same; the sectional areas of the inner side connecting section (21) and the outer side connecting section (25) are larger than the sectional area of the energy consumption section (23); the energy consumption section (23) is in smooth transition with the inner side connecting section (21) and the outer side connecting section (25) to form an inner side transition section (22) and an outer side transition section (24) respectively; the end section of the outer connecting section (25) is provided with an external thread (251).
3. The energy dissipating connection assembly as set forth in claim 2, wherein: the adjustable combined steel bar joint (3) comprises an outer sleeve (31), a first inner sleeve (32) and a second inner sleeve (33) which are arranged inside the outer sleeve, and a combining cap (34) which is abutted against the second inner sleeve (33);
one end part of the outer sleeve (31) is provided with an equal-diameter reducing opening (311) with the diameter larger than the nominal diameter of the outer side connecting section (25) of the energy consumption rod (2), and the inner wall of the section at the other end is provided with an internal thread (312); the outer diameter of the first inner sleeve (32) is larger than the diameter of the constant-diameter reducing opening (311) of the outer sleeve (31) but smaller than the inner diameter of the outer sleeve (31), a central countersunk hole is formed in one end of the first inner sleeve (32), internal threads (321) are machined in the inner wall of the central countersunk hole, a guide head (322) is arranged at the other end of the first inner sleeve (32), and the guide head (322) is arranged in a hemispherical or conical form; the central hole of the second inner sleeve (33) is a through hole, the diameter of the through hole is slightly larger than the maximum diameter of the guide head (322) of the first inner sleeve (32), an internal thread (331) is arranged on the inner wall of the through hole, and an external thread (332) is arranged on the wall of one end of the second inner sleeve; the combined cap (34) is provided with a central through hole, and the inner wall of the central through hole is provided with internal threads (341);
the end part of the outer connecting section (25) of the connected energy consumption rod (2) passes through the constant-diameter reducing opening (311), and the external thread (251) of the end part is matched and screwed with the internal thread (321) of the countersunk hole of the first inner sleeve (32); the internal thread (312) of the outer sleeve (31) is matched and screwed with the external thread (332) arranged on the wall of the second inner sleeve (33); the end section of the longitudinal steel bar (4) in the connected beam is provided with an external thread (41), and the external thread (41) is matched and screwed with the internal thread (331) on the inner wall of the second inner sleeve (33); the internal thread (341) of the cap (34) is matched and screwed with the external thread (41) at the end part of the longitudinal steel bar (4) in the beam, and the cap (34) is screwed at the tail end of the second inner sleeve (33).
4. An energy dissipating connection assembly as claimed in claim 3 applied to a core region of a fabricated concrete frame node, wherein: the energy-consumption connecting assembly applied to the core area of the assembled concrete frame node is characterized in that an anchoring block (1) of the energy-consumption connecting assembly is connected with an energy-consumption rod (2) and then pre-embedded in the core area of the column node, the anchoring block is aligned with a longitudinal steel bar (4) in a beam after the beam-column connection is completed, and the end part of an outer side connecting section (25) of the energy-consumption rod (2) does not protrude out of the surface of column concrete; column concrete near the outer side connecting section (25) of the energy consumption rod (2) is provided with a column side notch (6) to carry out connection construction between the energy consumption rod (2) and the longitudinal steel bar (4) in the beam, a beam end rabbet (7) with enough length needs to be reserved near the end part of the longitudinal steel bar in the beam to ensure the operation space of the adjustable combined steel bar joint (3), and the notch (6) and the rabbet (7) are filled with post-cast concrete (8) after connection and installation are finished.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710561269.0A CN107268784B (en) | 2017-07-11 | 2017-07-11 | Energy-consumption connecting assembly applied to core area of node of assembled concrete frame |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710561269.0A CN107268784B (en) | 2017-07-11 | 2017-07-11 | Energy-consumption connecting assembly applied to core area of node of assembled concrete frame |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107268784A CN107268784A (en) | 2017-10-20 |
| CN107268784B true CN107268784B (en) | 2023-01-06 |
Family
ID=60072557
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710561269.0A Active CN107268784B (en) | 2017-07-11 | 2017-07-11 | Energy-consumption connecting assembly applied to core area of node of assembled concrete frame |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107268784B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110158769A (en) * | 2019-05-16 | 2019-08-23 | 东南大学 | Full assembled is bolted Self-resetting bean column node, installation method and self-resetting method |
| CN110230369A (en) * | 2019-07-03 | 2019-09-13 | 厦门源昌城建集团有限公司 | A kind of assembles post and its joggle construction method |
| CN110468987A (en) * | 2019-08-08 | 2019-11-19 | 重庆大学 | A kind of novel anti-buckling replaceable connecting node of support-RC frame |
| CN111175111B (en) * | 2020-03-02 | 2022-02-01 | 湘潭大学 | Clamp for shear test of asphalt concrete contact test piece and test method thereof |
| CN111335146B (en) * | 2020-03-10 | 2021-05-18 | 青岛理工大学 | Frame type replaceable buckling-restrained damping energy dissipation device and using method thereof |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103556625B (en) * | 2013-10-27 | 2015-06-03 | 彭桂皎 | Complex squeezed pile forming construction method and complex squeezed pile forming device |
| CN105525679B (en) * | 2016-01-21 | 2017-09-29 | 东南大学 | A kind of local prestressing force assembled energy-dissipation beam column node |
| CN106499247B (en) * | 2016-10-21 | 2018-09-21 | 东南大学 | The replaceable energy consumption connection component of assembling frame beam-to-column joint |
| CN207794301U (en) * | 2017-07-11 | 2018-08-31 | 东南大学 | A kind of energy consumption connection component applied to assembly concrete frame joint core space |
-
2017
- 2017-07-11 CN CN201710561269.0A patent/CN107268784B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN107268784A (en) | 2017-10-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107268784B (en) | Energy-consumption connecting assembly applied to core area of node of assembled concrete frame | |
| CN106592807B (en) | Replaceable energy consumption connecting assembly for beam-column connection of assembled concrete frame | |
| CN107299789B (en) | Beam end adjustable combined energy consumption connecting assembly of assembled concrete frame | |
| CN102828560B (en) | Flange joint structure of hinge pin for assembled cold forming sectional steel structural connection | |
| CN110306727B (en) | Prefabricated prestressed steel pipe concrete column and construction method | |
| CN107447857B (en) | Beam end replaceable energy consumption connecting assembly of assembled concrete frame | |
| CN104878948A (en) | Reinforced concrete frame beam hogging moment region reinforcing method and reinforcing device | |
| KR20100076576A (en) | Concrete-filled steel tube | |
| TWI554667B (en) | Assembly buckling restrained brace using steel bar | |
| CN207794301U (en) | A kind of energy consumption connection component applied to assembly concrete frame joint core space | |
| CN111851757B (en) | Steel structure beam column connecting node with metal round bar energy dissipation damper | |
| JP6948754B2 (en) | Column base joint structure | |
| CN108625534B (en) | Knurling formula is planted muscle anchor head device | |
| CN110616855A (en) | Steel bar mechanical connection structure and connection method for prefabricated concrete structure | |
| CN202831237U (en) | Shaft flange joint structure for assembly-type cold rolled section steel structure connection | |
| CN106368319B (en) | A kind of nodal connection device suitable for fabricated construction | |
| CN110258966B (en) | Anti-pulling fiber reinforced composite bar connecting sleeve | |
| CN109267805B (en) | Assembly node for connecting rubber support with upper and lower structures and construction method | |
| CN219710758U (en) | Longitudinal prestress buckling-preventing double-steel-tube concrete column | |
| CN106639027B (en) | Self-stress buckling-restrained brace in threaded connection and assembling method thereof | |
| CN110805157B (en) | Cross energy dissipation support | |
| CN114197681B (en) | Grouting-free bar energy consumption device | |
| CN114294311B (en) | Anti-pulling flexible shear-resistant self-tapping screw | |
| CN202055415U (en) | Rebar splicing device | |
| JP7198692B2 (en) | Reinforced concrete column beam structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |