CN113152672A - Assembled beam column node with restorable function and beam falling prevention device - Google Patents
Assembled beam column node with restorable function and beam falling prevention device Download PDFInfo
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- CN113152672A CN113152672A CN202110419470.1A CN202110419470A CN113152672A CN 113152672 A CN113152672 A CN 113152672A CN 202110419470 A CN202110419470 A CN 202110419470A CN 113152672 A CN113152672 A CN 113152672A
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- column
- steel
- compression
- precast concrete
- damper
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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
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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
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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
Abstract
The invention relates to an assembly type beam column node with restorable function and a beam falling prevention device, which comprises: the device comprises a precast concrete column, a built-in compression-resistant damper and a beam falling-preventing component, wherein the built-in compression-resistant damper and the beam falling-preventing component are respectively fixed in a precast concrete beam; the prefabricated concrete upper column is provided with a lower column reserved longitudinal bar, a prestressed concrete lower column reserved longitudinal bar and a prestressed concrete upper column reserved longitudinal bar, wherein the lower column reserved longitudinal bar in the prefabricated concrete lower column is connected with the upper column reserved longitudinal bar in the prestressed concrete upper column through a steel bar sleeve; and (4) penetrating the longitudinal bars at the upper part of the beam through the embedded stirrups of the beam and then pouring the joint concrete. The invention solves the defects of complex site construction process, poor anti-seismic effect of the assembly type beam-column joint and the like of the existing assembly type beam-column joint; the invention can be directly used for beam-column joints, and has the advantages of rapid operation and installation, easy replacement of damaged dampers and low maintenance cost.
Description
Technical Field
The invention relates to the technical field of assembly type building structures, in particular to an assembly type beam-column joint with a restorable function and a beam falling prevention device.
Background
At present, the traditional construction method mainly based on site construction is mainly adopted in the building construction in China, the method has low industrialization degree, large labor demand, large resource consumption and serious environmental pollution, and can not meet the requirements of energy conservation, environmental protection and sustainable development. In recent years, in order to meet the requirements of 'green building' and 'building industrialization' and 'housing industrialization', China advocates to promote an 'industrialization mode' in construction, and related policies are issued, and a clear development target is provided for an assembled structure.
The connecting technology of the prefabricated building nodes in China mainly has the defects of high manufacturing cost, inconvenient stacking of prefabricated parts on a transportation site, more site wet operation, difficulty in ensuring the quality of beam-column nodes, complicated node construction and the like. In addition, China is in earthquake-prone areas, and earthquake-proof defense of buildings needs to meet the standard requirements of 'no damage in small earthquake, repairable in medium earthquake and tumbler in large earthquake', and also needs to consider the autonomous restoration and repairability of nodes after the earthquake.
In China, the post-earthquake self-resetting property and the repairability of the node are mainly realized by installing an external damper at the node of the beam column or adopting prestressed steel bars. However, the existing method has the problems of large occupation of external space, high maintenance cost in the later period of damage, difficulty in popularization and the like. At present, no method for realizing energy consumption during earthquake and automatic reset after the earthquake by using a built-in damper at the node of an assembled beam column exists.
At assembled beam column node, make prefabricated component connect through post-cast concrete and take shape, but the back junction easily forms the weak link, has the roof beam risk of falling, so set up the connection between the pretension method prestressing steel comes the reinforcing beam post at beam column node junction, prevents dropping of precast beam through setting up prestressing steel.
The built-in anti-compression damper is made of a memory alloy material and a rubber material, and does not occupy the external space. The memory alloy is a novel functional material, has the advantages of automatic reset, corrosion resistance, wear resistance, strong energy consumption capability, no magnetism, no toxicity and the like, is widely applied and is a high-quality shock absorption material; the rubber material has the advantages of high elasticity, strong resilience and low price; therefore, the best energy consumption effect can be achieved by using the memory alloy material and the rubber material as the built-in compression-resistant damper.
The existing fabricated beam-column nodes (such as authorized bulletin numbers of CN107237402A and CN107165272A) utilize prestressed reinforcements to realize low-damage self-reset after an earthquake, but the prestressed reinforcements cannot be replaced after being damaged, and the reinforcing and maintaining processes after the earthquake are complicated and the maintaining cost is high; and a method (such as No. CN108343170A and CN206157894U) of externally arranging a damper at a node of an assembled beam column is adopted, energy consumption is realized by utilizing the characteristic of small deformation of a viscoelastic material, and the damper has the advantages that the damper can be replaced after being damaged and damaged, but the damper is externally arranged without sealing, so that the service life of the damper is shortened, a larger external space is occupied, and the like.
Disclosure of Invention
Due to the defects in the prior art, the technical problem to be solved by the invention is to provide the assembled beam-column node with the restorable function and the beam falling prevention device.
In order to achieve the purpose, the invention adopts the following scheme:
an assembled beam-column joint with restorable functionality and a beam-drop prevention device, comprising: the device comprises a precast concrete lower column, a precast concrete upper column, a built-in anti-compression damper and an anti-beam-falling component, wherein the built-in anti-compression damper and the anti-beam-falling component are respectively fixed in a precast concrete left beam and a precast concrete right beam; the prefabricated concrete upper column is provided with a lower column reserved longitudinal bar, a prestressed concrete lower column reserved longitudinal bar and a prestressed concrete upper column reserved longitudinal bar, wherein the lower column reserved longitudinal bar in the prefabricated concrete lower column is connected with the upper column reserved longitudinal bar in the prestressed concrete upper column through a steel bar sleeve; and (4) penetrating the longitudinal bars at the upper part of the beam through the embedded stirrups of the beam and then pouring the joint concrete.
Compared with the prior art of the present concrete assembly type, the invention has the following advantages and effects:
1. the invention has the advantages of simple and convenient field installation, convenient operation and low noise in field construction.
2. The invention can reduce the field wet operation and the construction waste, and accords with the green and environment-friendly sustainable development.
3. The replaceable built-in damper is adopted, so that the space is saved, and the utilization rate of external space is increased;
the damping material adopts memory alloy and compression-resistant rubber, has the advantages of strong energy consumption capability, corrosion resistance, wear resistance, no magnetism, no toxicity, capability of recovering the original state after external force is removed and the like, can realize low-damage autonomous reset after an earthquake and can well solve the autonomous reset after the earthquake.
4. According to the invention, the threaded steel bar is embedded in the middle of the composite superposed beam, the steel plate is welded at the end part of the steel bar, the two steel plates are rotatably twisted together at the joint, and the inclined-pulling steel bar is arranged in the plastic hinge area, so that the beam falling can be prevented.
5. The built-in compression-resistant damper is internally provided with the thin-wall fixing sleeve to restrain the memory alloy column, so that the bearing capacity is increased, and the memory alloy column is prevented from being deformed by pressure instability and being damaged prematurely; the memory alloy columns are arranged in a plum blossom shape, the energy consumption effect of the memory alloy columns is fully utilized, and the waste of materials is avoided.
6. According to the invention, the damper thin-wall sealing steel shell is arranged outside the built-in damper, so that the damper is protected, and the service life of the damper is prolonged.
Drawings
FIG. 1 is a schematic plan view of an assembled beam-column joint with a recoverable function and a beam-drop prevention device;
FIG. 2 is a schematic plane view of a precast concrete composite superposed beam connection;
FIG. 3 is a schematic plan view of a precast concrete column connection;
FIG. 4 is a schematic view of a part of a pre-buried channel steel of a precast concrete composite superposed beam
FIG. 5 is a schematic view of a lower column clip channel plate;
FIG. 6 is a schematic plan view of a built-in compression resistant damper;
FIG. 7 is a cross-sectional view taken along line 1-1 of FIG. 6;
FIG. 8 is a three-dimensional schematic view of a lower column clip channel steel plate;
FIG. 9 is a three-dimensional schematic view of a lower column channel steel clip channel steel plate;
FIG. 10 is a three-dimensional schematic view of a fixed plate with a built-in compression-resistant damper;
FIG. 11 is a three-dimensional schematic view of a built-in compression resistant damper backing plate;
FIG. 12 is a three-dimensional view of an assembled beam-column joint with restorable functionality and anti-drop device
In the figure, 1, a precast concrete lower column, 2, a precast concrete upper column, 3a, a precast concrete left beam, 3b, a precast concrete right beam, 4, diagonal draw steel bars, 5, prestressed twisted steel bars, 6, end steel plates, 7, node stirrups, 8, beam lower longitudinal bars, 9, beam channel steel, 10, lower column channel steel, 11, high-strength bolts, 12, upper column reserved longitudinal bars, 13, lower column reserved longitudinal bars, 14, steel bar sleeves, 15, beam upper longitudinal bars, 16, beam embedded stirrups, 17, lower column channel steel groove steel plates, 18, lower column groove steel plates, 19, a built-in compression damper, 20, a built-in compression damper fixing plate, 21, a memory alloy column, 22, a thin-wall fixing sleeve, 23, a memory alloy wire mesh, 24, compression rubber, 25, a built-in compression damper cushion plate, 26, a damper thin-wall sealing steel shell, 27 and a built-in compression damper cushion strip, 28. and fixing the screw.
Detailed Description
As shown in fig. 1 to 12, a fabricated beam-column joint having a restorable function and a girder drop prevention device, includes: the prefabricated concrete lower column 1, the prefabricated concrete upper column 2, the built-in anti-compression damper 19 and the anti-falling beam member are respectively fixed in the prefabricated concrete left beam 3a and the prefabricated concrete right beam 3 b; wherein, the lower column of precast concrete lower column 1 reserves vertical muscle 13 and passes through reinforcing bar muffjoint with the last post of prestressing force concrete upper column 2 in reserves vertical muscle 12.
A fall arrest beam member comprising: the steel plate comprises diagonal draw steel bars 4, prestressed twisted steel bars 5 and end steel plates 6; the cross section of the end steel plate 6 is rectangular, the material is hard steel, the end steel plate is welded with the prestressed twisted steel bar 5, and the two end steel plates 6 are rotationally twisted together; and oblique-pulling steel bars are arranged in a plastic hinge area of the precast concrete composite superposed beam, and binding joint stirrups are arranged at the joints.
The built-in compression-resistant damper 19 includes: the steel plate comprises a lower column clamping groove steel plate 18, a lower column clamping groove steel plate 17, a built-in anti-compression damper fixing plate 20, a memory alloy column 21, a thin-wall fixing sleeve 22, a memory alloy wire mesh 23, compression-resistant rubber 24, a built-in anti-compression damper backing plate 25, a damper thin-wall sealing steel shell 26, a built-in anti-compression damper backing strip 27 and fixing screws. The built-in anti-compression damper fixing plate 20 is made of hard steel, clamping groove connectors are arranged at two ends of the built-in anti-compression damper fixing plate and are respectively clamped with the lower column clamping channel steel plate 18 and the lower column clamping channel steel plate 17 through the clamping groove connectors, the built-in anti-compression damper fixing plate 20 and bolt holes of the built-in anti-compression damper backing plate 25 are connected with the built-in anti-compression damper backing strip 27, the built-in anti-compression damper backing plate 25 is made of soft steel, and therefore a certain deformation space of the memory alloy wire mesh 23 and the compression-resistant rubber 24 is guaranteed, and energy is released; the memory alloy column 21 is a cylinder woven by memory alloy materials, five of the memory alloy columns are in a group and are arranged in a plum blossom shape, two ends of the memory alloy column are welded on the fixing plate 20 of the built-in anti-compression damper, a thin-wall fixing sleeve 22 is arranged on the outer side of the memory alloy column 21, the thin-wall fixing sleeve 22 is made of steel with better compression resistance, and the length of the thin-wall fixing sleeve is slightly shorter than that of the memory alloy column 21, so that the memory alloy column 21 is prevented from being damaged in the transportation process; the memory alloy wire mesh 23 and the compression-resistant rubber 24 are woven together according to the design requirement of compression strength and are filled around the memory alloy column 21, so that the compression-resistant and shock-absorbing effects are provided. After the damper is installed, the damper sealing steel shell 30 is fixed by using a bonding material, and the damper is protected by using a material with certain rigidity and difficult deformation, so that the service life of the damper is prolonged.
The beam channel steel 9 is embedded in the precast concrete left beam 3a and the precast concrete right beam 3b and is connected with the beam lower part longitudinal rib 8 in a spot welding mode, the beam lower part longitudinal rib 8 and the lower column channel steel 10 embedded in the precast concrete lower column 1 with a bolt hole are connected through the high-strength bolt 11, the lower column channel steel clamping channel steel plate 17 in the built-in anti-compression damper 19 is welded with the lower column channel steel 10, the damper thin-wall sealing steel shell 25 is fixed finally, and the built-in anti-compression damper 19 is connected.
Beam embedded stirrups 16 are reserved at the upper parts of the precast concrete left beam 3a and the precast concrete right beam 3b, the beam stirrups need to be encrypted in a node core area, and built-in anti-falling beam dampers 19 are respectively embedded in the beam stirrups; the lower post of precast concrete lower prop 1, precast concrete upper prop 2 is reserved to indulge muscle 13 and is reserved to indulge muscle 12 with the upper prop and pass through steel sleeve 14 and connect, and the length that the steel bar was reserved to the precast prop should guarantee to use steel sleeve 14 to connect the time adjacent steel sleeve 14 certain distance that staggers. The surfaces of the precast concrete lower column 1 and the precast concrete upper column 2 are both provided with serrated racking grooves, and the precast concrete lower column 1 is in a step shape; the surfaces of the precast concrete left beam 3a and the precast concrete right beam 3b are provided with concave-convex grooves, so that the bonding between the cast-in-place concrete and the precast concrete at the later stage is increased; and finally, when in-situ pouring is carried out, the node stirrups 7 are arranged at the nodes, the nodes need to be encrypted, and the pouring is finished after the longitudinal reinforcements 15 on the upper part of the beam penetrate through the beam embedded stirrups 16.
Claims (5)
1. An assembled beam-column joint with restorable functionality and a beam-drop prevention device, comprising: the device comprises a precast concrete lower column, a precast concrete upper column, a built-in anti-compression damper and an anti-beam-falling component, wherein the built-in anti-compression damper and the anti-beam-falling component are respectively fixed in a precast concrete left beam and a precast concrete right beam; wherein, the lower column reservation of precast concrete lower column is indulged the muscle and is connected through the reinforcing bar sleeve with the upper prop reservation of prestressed concrete upper prop in.
2. The assembled beam-column joint with restorable function and beam-falling prevention device of claim 1, wherein the beam-falling prevention member comprises: diagonal reinforcing steel bars, prestressed twisted reinforcing steel bars and end steel plates; the cross section of the end steel plate is rectangular, the end steel plate is made of hard steel and is welded with the prestressed twisted steel, and the two end steel plates are rotationally twisted together; and oblique-pulling steel bars are arranged in a plastic hinge area of the precast concrete composite superposed beam, and binding joint stirrups are arranged at the joints.
3. A modular beam-column joint with restorable functionality and fall prevention according to claims 1-2 wherein the built-in anti-compression damper comprises: the steel plate comprises a lower column clamping groove steel plate, a lower column channel steel clamping groove steel plate, a built-in compression-resistant damper fixing plate, a memory alloy column, a thin-wall fixing sleeve, a memory alloy wire mesh, compression-resistant rubber, a built-in compression-resistant damper base plate and a damper thin-wall sealing steel shell. The built-in anti-compression damper fixing plate is made of hard steel, clamping groove interfaces are arranged at two ends of the built-in anti-compression damper fixing plate and are respectively clamped with the lower column clamping groove steel plate and the lower column channel steel clamping groove steel plate through the clamping groove interfaces, a bolt hole in the bottom of the built-in anti-compression damper fixing plate is connected with the built-in anti-compression damper backing plate, and the built-in anti-compression damper backing plate is made of soft steel; the memory alloy column is a cylinder woven by memory alloy materials, five memory alloy columns are in a group and are arranged in a plum blossom shape, two ends of the memory alloy column are welded on the fixed plate of the built-in compression-resistant damper, a thin-wall fixed sleeve is arranged on the outer side of the memory alloy column, the thin-wall fixed sleeve is made of steel with better compression resistance, and the length of the thin-wall fixed sleeve is slightly shorter than that of the memory alloy column, so that the memory alloy column is protected from being damaged in the transportation process; the memory alloy wire mesh and the compression-resistant rubber are woven together according to the design requirement of compression strength, the memory alloy wire mesh and the compression-resistant rubber are filled around the memory alloy column, and the damper sealing steel shell is fixed by using a bonding material after the damper is installed.
4. The assembled beam-column joint with recoverable function and beam-falling prevention device of claims 1-3, wherein the beam channel steel is pre-embedded in the precast concrete left beam and the precast concrete right beam and is connected with the lower longitudinal bar of the beam through spot welding, the lower longitudinal bar of the beam is connected with the lower column channel steel pre-embedded in the precast concrete lower column with bolt holes through high-strength bolts, the lower column channel steel slot steel plate in the built-in compression-resistant damper is welded with the lower column channel steel, and finally the damper thin-wall sealing steel shell is fixed to complete the connection of the built-in compression-resistant damper.
5. The assembled beam-column joint with the restorable function and the beam falling prevention device as claimed in claims 1 to 4, wherein beam embedded stirrups are reserved at the upper parts of the precast concrete left beam and the precast concrete right beam, the beam stirrups need to be encrypted near the core area of the joint, and built-in beam falling prevention dampers are respectively embedded in the beam stirrups; the lower post of precast concrete lower prop, precast concrete upper prop is reserved to indulge the muscle and pass through steel sleeve and connect with the upper prop, and adjacent steel sleeve staggers certain distance when the length that the steel bar was reserved to the precast prop should guarantee to use steel sleeve to connect. The surfaces of the precast concrete lower column and the precast concrete upper column are both provided with serrated racking grooves, and the precast concrete lower column is in a step shape; the surfaces of the precast concrete left beam and the precast concrete right beam are provided with concave-convex grooves; and arranging a node stirrup at the node, wherein the node needs to be encrypted, and finishing pouring after penetrating the longitudinal bar at the upper part of the beam through the embedded stirrup of the beam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110419470.1A CN113152672B (en) | 2021-04-19 | 2021-04-19 | Assembled beam column node with restorable function and beam falling prevention device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110419470.1A CN113152672B (en) | 2021-04-19 | 2021-04-19 | Assembled beam column node with restorable function and beam falling prevention device |
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| CN113152672A true CN113152672A (en) | 2021-07-23 |
| CN113152672B CN113152672B (en) | 2022-05-03 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106592413A (en) * | 2016-12-23 | 2017-04-26 | 大连理工大学 | Bridge damping control system combing high-damping rubber with shape memory alloy |
| CN107905402A (en) * | 2017-11-30 | 2018-04-13 | 扬州大学 | A kind of assembled RPC/ Combined concretes frame energy-dissipating and shock-absorbing node |
| CN108316734A (en) * | 2018-04-21 | 2018-07-24 | 中国地震局工程力学研究所 | A kind of granulated multistage-multidirectional energy-dissipating and shock-absorbing bearing |
| CN108678184A (en) * | 2018-07-11 | 2018-10-19 | 北京市道路工程质量监督站 | A kind of Self-resetting shock isolating pedestal |
| KR20190036248A (en) * | 2017-09-27 | 2019-04-04 | (주)오푸스본 | Seismic retrofit structure for building and seismic retrofit method using the same |
-
2021
- 2021-04-19 CN CN202110419470.1A patent/CN113152672B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106592413A (en) * | 2016-12-23 | 2017-04-26 | 大连理工大学 | Bridge damping control system combing high-damping rubber with shape memory alloy |
| KR20190036248A (en) * | 2017-09-27 | 2019-04-04 | (주)오푸스본 | Seismic retrofit structure for building and seismic retrofit method using the same |
| CN107905402A (en) * | 2017-11-30 | 2018-04-13 | 扬州大学 | A kind of assembled RPC/ Combined concretes frame energy-dissipating and shock-absorbing node |
| CN108316734A (en) * | 2018-04-21 | 2018-07-24 | 中国地震局工程力学研究所 | A kind of granulated multistage-multidirectional energy-dissipating and shock-absorbing bearing |
| CN108678184A (en) * | 2018-07-11 | 2018-10-19 | 北京市道路工程质量监督站 | A kind of Self-resetting shock isolating pedestal |
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| CN113152672B (en) | 2022-05-03 |
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