CN107435445B - A kind of reinforcement means of reinforced concrete frame structure alien invasion node - Google Patents
A kind of reinforcement means of reinforced concrete frame structure alien invasion node Download PDFInfo
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- CN107435445B CN107435445B CN201710733874.1A CN201710733874A CN107435445B CN 107435445 B CN107435445 B CN 107435445B CN 201710733874 A CN201710733874 A CN 201710733874A CN 107435445 B CN107435445 B CN 107435445B
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- E—FIXED CONSTRUCTIONS
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- 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
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
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- 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
- E04H9/027—Preventive constructional measures against earthquake damage in existing buildings
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Abstract
The present invention relates to a kind of reinforcement means of reinforced concrete frame structure alien invasion node, including the following steps: (1) prefabricated ECC prefabricated board；(2) ECC prefabricated board is installed；ECC prefabricated board is pasted in joint cores and Zhou Bianliang, styletable alien invasion, uses mechanical anchor in joint cores and beam-ends；(3) fiber cloth is pasted in styletable carry out ring packet, i.e. the present invention is in reinforced steel concrete frame structure alien invasion node, ECC prefabricated board is pasted in joint cores and its Zhou Bianliang, styletable alien invasion, and mechanical anchor is carried out to ECC prefabricated board respectively in joint cores, beam-ends and styletable and pastes fiber cloth package, improve the shearing strength of joint cores and the bending strength of beam-ends, realize beam-ends plastic hinge, improve node entirety anti-seismic performance, many deficiencies of traditional reinforcement means are overcome, convenient, highly-safe and durability of constructing is good.
Description
Technical field
The present invention relates to the concrete strengthening field of engineering technology in civil engineering, in particular to a kind of armored concrete
The reinforcement means of frame structure alien invasion node.
Background technique
Under horizontal earthquake action, it is broken that brittle shearing easily occurs for reinforced concrete frame node (referred to as " RC node ")
Building is badly caused to destroy or collapse.Existing more RC frame structure building presses early stage Specification Design, and node tends not to
The defects of meeting the requirement of current specifications, such as there is core space under-reinforced, anchoring loosely, it is unsatisfactory for " the strong weak component of node "
Aseismic Design principle.As the power transmission hinge of entire frame structure, RC node insufficient to these anti-seismic performances is taken effectively
Strengthening measure for earthquake resistance be very necessary.
Currently, the seismic hardening for RC node, has a large amount of experimental study and engineering practice, common reinforcing side
Method mainly has concrete section increment, High Strength Steel Wire Mesh And Polymer Mortar, outsourcing fashioned iron, affixing steel plate and pastes fiber increasing
Strong composite material (FRP) etc..The methods of concrete section increment, High Strength Steel Wire Mesh And Polymer Mortar are laborious time-consuming；Outside
The methods of pouch-type steel, affixing steel plate, externally bonded FRP reinforcement cloth or lath are efficient and convenient, but not strong to space nodes applicability, and preceding two
Person's durability is poor, and the stripping damage and problem of the generally existing load later period FRP of the latter.
Summary of the invention
The object of the invention is also to provide a kind of reinforcement means of reinforced concrete frame structure alien invasion node, lead to
It crosses and pastes ECC prefabricated board in joint cores and its Zhou Bianliang, styletable alien invasion, and in joint cores, beam-ends and styletable point
It is other that mechanical anchor is carried out to ECC prefabricated board and pastes fiber cloth package, improve the shearing strength and beam-ends of joint cores
Bending strength realizes beam-ends plastic hinge, improves node entirety anti-seismic performance, overcomes all of traditional reinforcement means
Mostly insufficient, convenient, highly-safe and durability of constructing is good.
To solve the above-mentioned problems, the present invention provides a kind of reinforcings of reinforced concrete frame structure alien invasion node
Method, including the following steps:
(1) prefabricated ECC prefabricated board；
(2) ECC prefabricated board is installed
ECC prefabricated board is pasted in joint cores and Zhou Bianliang, styletable alien invasion, is used in joint cores and beam-ends
Mechanical anchor；
(3) fiber cloth is pasted in styletable carry out ring packet.
According to a kind of reinforcing side of reinforced concrete frame structure alien invasion node described in the application preferred embodiment
Method according to node size to be reinforced and arrangement of reinforcement situation, determines the size, shape and thickness of ECC prefabricated board in step (1),
And make corresponding template；The position for finding out joint reinforcing bar to be reinforced determines the position of the preformed hole of prefabricated board, and in template
Middle placement cylindrical body foam identical with required reserved pore size；By in the mixing good ECC material injection template at
Type.
According to a kind of reinforcing side of reinforced concrete frame structure alien invasion node described in the application preferred embodiment
Method, size, shape and the thickness of the ECC prefabricated board are determined according to shape, the size to reinforcing joint:
Height of the ECC prefabricated board along mast axis direction takes the sum of deck-molding and twice of column section height；
The ECC prefabricated board takes column wide plus twice of deck-molding or T-section along the width or crisscross joint of beam axis direction
Point takes column width to double deck-molding；
The prefabricated plate thickness of ECC, or when beam, column alien invasion are concordant, using etc. slabs；Or work as beam, column alien invasion not
When concordant, using non-equal slabs, the prefabricated plate thickness of beam-ends is different from styletable and core space, guarantees that alien invasion is concordant.
According to a kind of reinforcing side of reinforced concrete frame structure alien invasion node described in the application preferred embodiment
The reserving hole diameter of method, the ECC prefabricated board is 18mm, and hole back gauge and spacing are not less than 100mm, several preformed holes pair
Claim arrangement.
According to a kind of reinforcing side of reinforced concrete frame structure alien invasion node described in the application preferred embodiment
Method, the preferred PVA-ECC prefabricated board of ECC prefabricated board, the ECC material is by vinal, cement, flyash, thin
Sand, water-reducing agent and water are stirred evenly and are made.
According to a kind of reinforcing side of reinforced concrete frame structure alien invasion node described in the application preferred embodiment
Method, the mixing parameter of the ECC prefabricated board be configured in every 1 kilogram of cement 0.80~0.82 kilogram of I grades of flyash,
0.71~0.73 kilogram of yellow sand and 0.5% high efficiency water reducing agent, wherein water-cement ratio is 0.25~0.35, the vinal
Volume incorporation be 1.8%~2.2%.
According to a kind of reinforcing side of reinforced concrete frame structure alien invasion node described in the application preferred embodiment
Method drills in joint cores and beam alien invasion corresponding position, clears up simultaneously in step (2), then uses reaming
Drill bit carries out second reaming, and is cleaned out with air pump；Clear up frame alien invasion joint cores and its one times of periphery beam, column
Beam, column concrete surface within the scope of depth of section, and coated structure glue, are securely pasted on node area for ECC prefabricated board；It will
Base expanding and base expanding anchor bolt various components are tightened afterwards, and then anchor bolt is fitted into molding hole and is tightened.
According to a kind of reinforcing side of reinforced concrete frame structure alien invasion node described in the application preferred embodiment
Method, the ECC prefabricated board carry out mechanical anchor in core space and beam-ends by the preformed hole using M16 base expanding and base expanding type anchor bolt, bore
Hole depth is not less than 100mm.
According to a kind of reinforcing side of reinforced concrete frame structure alien invasion node described in the application preferred embodiment
Method, the ECC prefabricated board are only pasted onto the alien invasion of frame joint, ECC prefabricated board center and node core using structure glue
Heart district center is overlapped.
According to a kind of reinforcing side of reinforced concrete frame structure alien invasion node described in the application preferred embodiment
Method is polished to upper and lower styletable package area's concrete surface, chamfering and is cleared up, then paste fiber cloth in step (3)
Carry out the anchoring of ring packet.
According to a kind of reinforcing side of reinforced concrete frame structure alien invasion node described in the application preferred embodiment
Method, the stickup height of the fiber cloth are one times of column section height, and width is the height of styletable ECC prefabricated board.
Compared with prior art, there are following technical effects by the present invention:
1, the present invention is directed to the node defect of " strong component weak bus ", by outside joint cores and Zhou Bianliang, styletable
Facade pastes ECC prefabricated board, improves the shearing strength of joint cores and the bending strength of beam-ends, realizes the outer shifting of beam hinge,
Improve node entirety anti-seismic performance；
2, the present invention uses Varying-thickness ECC prefabricated board, can be used for reinforcing the not concordant space nodes of beam column alien invasion, compared with
Outer patch fibrous composite (FRP) and steel plate, the scope of application is wider, and it is good etc. to have both convenient, highly-safe and durability of constructing
Advantage has broad application prospects.
Detailed description of the invention
Fig. 1-a is the structural schematic diagram of present example 1PVA-ECC prefabricated board；
Fig. 1-b is the structural schematic diagram of present example 1PVA-ECC prefabricated board；
Fig. 1-c is the preformed hole location drawing of present example 1PVA-ECC prefabricated board；
Fig. 2 is present example 1PVA-ECC plate sticking area schematic diagram；
Fig. 3 is the overall schematic after the installation of present example 1PVA-ECC plate；
Fig. 4 is the overall effect schematic diagram after 1 joint reinforcing of present example；
Fig. 5-a is the structural schematic diagram of present example 2PVA-ECC prefabricated board；
Fig. 5-b is the structural schematic diagram of present example 2PVA-ECC prefabricated board；
Fig. 5-c is the preformed hole location drawing of present example 2PVA-ECC prefabricated board；
Fig. 6 is present example 2PVA-ECC plate sticking area schematic diagram；
Fig. 7 is the overall schematic after the installation of present example 2PVA-ECC plate；
Fig. 8 is the overall effect schematic diagram after 2 joint reinforcing of present example.
Specific embodiment
The present invention provides a kind of ruggedized construction of reinforced concrete frame structure alien invasion node, i.e., in joint cores
ECC prefabricated board is set with Zhou Bianliang, styletable alien invasion, and uses mechanical anchor in joint cores and beam-ends, in styletable ring packet
Fiber cloth, the construction method corresponding to this ruggedized construction are divided into following steps:
(1) prefabricated ECC prefabricated board
In step (1), according to node size to be reinforced and arrangement of reinforcement situation, determine the size of ECC prefabricated board, shape and
Thickness, and make corresponding template；The position for finding out joint reinforcing bar to be reinforced, determines the position of the preformed hole of prefabricated board, and
Cylindrical body foam identical with required reserved pore size is placed in template；It will be in the mixing good ECC material injection template
Molding.
In the present invention, engineered cementitious based composites (ECC) are the Micromechanics designs through system, are stretching and are shearing
A kind of fiber reinforced cement-based composite material of high ductibility is presented under load, it can effectively improve the tough of cement matrix
Property, make it that the feature of strain hardening be presented, and the tension of substrate, flexural strength can be improved, makes it that more microcracks be presented and open
The feature split, thus the very good solution endurance issues of concrete.The preferred polyvinyl alcohol of ECC prefabricated board of the invention is fine
Cement-base composite material (PVA-ECC) prefabricated board is tieed up, but the present invention is not limited thereto, can add in ECC material and remove PVA
Other outer fibrous materials of material, but need proof strength, construction workability, durability etc. and require, if PVA-ECC prefabricated board is by gathering
Alcohol fibers, cement, flyash, fine sand, water-reducing agent and water are stirred evenly and are made.
Further, the mixing parameter of PVA-ECC prefabricated board is that 0.80~0.82 thousand are configured in every 1 kilogram of cement
Gram I grades of flyash, 0.71~0.73 kilogram of yellow sand and 0.5% high efficiency water reducing agent, wherein water-cement ratio is 0.25~0.35, poly- second
The volume incorporation of enol fiber is 1.8%~2.2%.
In the present invention, the size, shape of PVA-ECC prefabricated board are determined according to shape, the size to reinforcing joint:
Height of the PVA-ECC prefabricated board along mast axis direction takes the sum of deck-molding and twice of column section height；
In the present invention, node may be crisscross joint (please referring to Fig. 1 a-Fig. 4), it is also possible to which T shape node (is asked
With reference to Fig. 5 a-Fig. 8), the present invention is without limitation, and therefore, PVA-ECC prefabricated board is also classified into along the width of beam axis direction
Two kinds of situations: when node is crisscross joint, PVA-ECC prefabricated board is taken along the width of beam axis direction for crisscross joint
Column is wide to add twice of deck-molding；When node is T-section point, PVA-ECC prefabricated board is taken along the width of beam axis direction for T-section point
Column width doubles deck-molding；
The related prefabricated plate thickness of PVA-ECC, also in two kinds of situation, i.e., when beam, column alien invasion are concordant, using etc. slabs；
When beam, column alien invasion be not concordant, using non-equal slabs, the prefabricated plate thickness of beam-ends is different from styletable and joint cores, protects
It is concordant to demonstrate,prove alien invasion, specific thickness then calculates determination according to reinforcing joint actual conditions.
(2) PVA-ECC prefabricated board is installed
PVA-ECC prefabricated board is pasted in joint cores and Zhou Bianliang, styletable alien invasion, in joint cores and beam-ends
Using mechanical anchor.The present invention is preferably connected by the way of structure glue in joint cores and Zhou Bianliang, styletable alien invasion
Connect ECC prefabricated board, structure glue preferred epoxy glue.
In step (2), drills in joint cores and beam alien invasion corresponding position, clear up, then use simultaneously
Reaming bit carries out second reaming, and is cleaned out with air pump；Clear up one times of frame alien invasion joint cores and its periphery
PVA-ECC, is securely pasted on node area by beam, the beam in column section altitude range, column concrete surface, and coated structure glue；
Rear base expanding and base expanding anchor bolt various components are tightened, then anchor bolt is fitted into molding hole and is tightened.
Further, PVA-ECC prefabricated board reserving hole diameter is 18mm, and hole back gauge and spacing are not less than 100mm,
Several preformed holes are arranged symmetrically.PVA-ECC prefabricated board using M16 base expanding and base expanding type anchor bolt by prefabricated board preformed hole in core space and
Beam-ends carries out mechanical anchor, and drilling depth is not less than 100mm, and bore diameter is determined according to selected anchor bolt size.
Further, PVA-ECC prefabricated board is only pasted onto the alien invasion of frame joint using structure glue, and PVA-ECC is prefabricated
Plate center is overlapped with joint core district center.
(3) fiber cloth is pasted in styletable carry out ring packet
The preferred carbon cloth of fiber cloth of the invention (CFRP), but the present invention is not limited thereto, other kinds also can be used
Fiber cloth, such as the one or more of glass fibre, basalt fibre or aramid fiber.
In step (3), is polished upper and lower styletable package area's concrete surface, chamfering and cleared up, then successively
It pastes fiber cloth and carries out the anchoring of ring packet.Pasting height is one times of column section height, and width is the height of styletable PVA-ECC prefabricated board
Degree wraps up 2~3 layers of fiber cloth.
In conclusion the reinforcement means of reinforced concrete frame structure alien invasion node can be refined as it is following specific
Step:
(1) prefabricated PVA-ECC prefabricated board
According to node size to be reinforced and arrangement of reinforcement situation, determine PVA-ECC prefabricated board shape (cross or T shape) and
Size (uniform thickness or not uniform thickness).Height of the PVA-ECC prefabricated board along mast axis direction take deck-molding and twice column section height it
With.For PVA-ECC prefabricated board along the width of beam axis direction, crisscross joint takes column wide plus twice of deck-molding, and T-section point takes
Column width doubles deck-molding.Plate thickness prefabricated for PVA-ECC, when beam column alien invasion is concordant, using etc. slabs；When outside beam column
When facade is not concordant, using non-equal slabs, i.e. the prefabricated plate thickness of beam-ends is different from styletable and core space, guarantees that alien invasion is flat
Together, specific thickness then calculates determination according to reinforcing joint actual conditions.
The position for finding out joint reinforcing bar to be reinforced, determines the position of the preformed hole of prefabricated board, and hole back gauge and spacing be not small
In 100mm, pitch-row can be 250~300mm；Corresponding wooden model is made, and is placed in a template equal sized with required preformed hole
Same cylindrical body foam will be injected in the template by the PVA-ECC material of the match ratio mixing and be formed.
(2) ECC prefabricated board is installed
Drilling: using according to PVA-ECC prefabricated board institute's reserving hole position and drill with the drill bit that anchor bolt matches,
Reinforcing bar must not be damaged, hole depth is not less than 100mm, clears up hole, then carries out second reaming using reaming bit, and use gas
Pump is cleaned out；
Clear up node bond regions: in crisscross joint cleaning joint cores, upper next times of column section altitude range and left
Concrete outer surface within the scope of right one times of beam section height；T-section point clears up joint cores, upper next times of column section height
Concrete outer surface within the scope of degree and one times of deck-molding；
It pastes PVA-ECC prefabricated board: in bond regions coated structure glue, pasting the PVA-ECC prefabricated board, guarantee it
Center is overlapped with joint core district center；
Anchoring PVA-ECC prefabricated board: rear base expanding and base expanding anchor bolt various components are tightened, and guarantee does not loosen, and then fill anchor bolt
Enter in molding hole, and apply torsion according to the requirement of the specifications and models of anchor bolt with torque spanner and tighten nut, is installed.
(3) the ECC prefabricated board of ring packet fiber cloth anchoring styletable
It polished column upper and lower end package area's concrete surface, chamfering and cleared up, then layer-by-layer affixing carbon fabric
The anchoring of ring packet is carried out, swathing width is styletable prefabricated board height, wraps up 2~3 layers, glue used is epoxide-resin glue.Swathe column
The fiber cloth at end is recommended to use carbon cloth, other fibre types cloth also can be used, such as can be fine for glass fabric, basalt
Tie up the one or more of cloth or aryl fiber cloth.
In order to better illustrate and understand the present invention, lower section is by embodiment 1 and embodiment 2 and in conjunction with attached drawing to this hair
It is bright to be described in detail.
Embodiment 1:
Fig. 1 a-Fig. 4 is please referred to, by taking certain frame interior joint as an example, 3 sectional dimension of column is 450 × 450mm, and beam 4 is cut
Having a size of 350 × 700mm, beam column alien invasion is not concordant in face, and beam axis deviates 25mm outward, this node has " the strong structure of weak bus
Part " problem (such as core space hooping bars layout is insufficient).
According to reinforcing joint situation, 1 shape and size of PVA-ECC prefabricated board are as shown in Fig. 1-a, 1-b and 1-c
One cross unequal thickness plate, wherein beam-ends 30mm is thick, and core space and styletable 55mm are thick.Preformed hole 2 is 16, diameter 18mm total,
Symmetrically placed, wherein core space assumes diamond in shape distribution, and 4 holes are respectively positioned on the midline position on each side of core space, and away from each side 100mm,
Specific location is as shown in fig 1-c.
Template is made, guarantees that beam-ends is 25mm lower than column counterdie, by the cylindrical body placement of foam corresponding position of diameter 18mm；
Then the PVA-ECC material being stirred is injected in template, forms cross PVA-ECC prefabricated board 1.
It drills in component core space and beam-ends alien invasion corresponding position, depth 100mm is cleared up, then using hairbrush
Second reaming 5 is carried out using reaming bit, and is cleaned out with air pump.
As shown in Fig. 2, on joint cores, node in next times of column section altitude range column surface and node
Concrete outer surface 8 within the scope of the one times of deck-molding in left and right carries out polishing until exposing new face, and dust removing is clean.
As shown in figure 3, pasting PVA-ECC prefabricated board 1 in bond regions coated structure glue.By rear base expanding and base expanding anchor bolt various components
It tightens, is then loaded into molding hole, and apply torsion according to the requirement of the specifications and models of anchor bolt with torque spanner and tighten spiral shell
Mother is installed.
As shown in figure 4,0.167mm thickness carbon cloth 7 is pasted by upper and lower newel post carries out the anchoring of ring packet, swathing height is one times
Column section height.It specifically will first wrap up the polishing of area's surface concrete, chamfering and clear up, first brush one layer of epoxide-resin glue, CFRP cloth
One layer of package, then one layer of epoxide-resin glue is brushed, CFRP cloth wraps up one layer again, wraps up three layers of CFRP cloth according to this, guarantees filling for glue
Sub-dip profit.Fig. 4 is the overall effect schematic diagram after 1 frame interior joint of the present embodiment is reinforced.
Embodiment 2:
Fig. 5 a-Fig. 8 is please referred to, by taking certain frame mid-side node as an example, 3 sectional dimension of column is 450 × 450mm, and beam 4 is cut
Having a size of 350 × 700mm, beam column alien invasion is not concordant in face, and beam axis deviates 25mm outward, this node has " the strong structure of weak bus
Part " problem (such as core space hooping bars layout is insufficient).
According to reinforcing joint situation, 9 shape and size of PVA-ECC prefabricated board are as shown in Fig. 5-a, 5-b and 5-c
One T shape unequal thickness plate, wherein beam-ends 30mm is thick, and core space and styletable 55mm are thick.It is preformed hole 2 total 10, diameter 18mm, right
Claim to place, wherein core space assumes diamond in shape distribution, and 4 holes are respectively positioned on the midline position on each side of core space, and away from each side 100mm, has
Body position is as shown in Fig. 5-c.
Template is made, guarantees that beam-ends is 25mm lower than column counterdie, by the cylindrical body placement of foam corresponding position of diameter 18mm；
Then the PVA-ECC material being stirred is injected in template, the at T-shaped PVA-ECC prefabricated board 9 of shape.
It drills in component core space and beam-ends alien invasion corresponding position, depth 100mm is cleared up, then using hairbrush
Second reaming 10 is carried out using reaming bit, and is cleaned out with air pump.
As shown in fig. 6, on joint cores, node in next times of column section altitude range column surface and one times
Concrete outer surface 11 within the scope of deck-molding carries out polishing until exposing new face, and dust is removed completely.
As shown in fig. 7, pasting PVA-ECC prefabricated board in bond regions coated structure glue.By rear base expanding and base expanding anchor bolt various components
It tightens, is then loaded into molding hole, and apply torsion according to the requirement of the specifications and models of anchor bolt with torque spanner and tighten spiral shell
Mother is installed.
As shown in figure 8,0.167mm thickness carbon cloth 7 is pasted by upper and lower newel post carries out the anchoring of ring packet, swathing height is one times
Column section height.It specifically will first wrap up the polishing of area's surface concrete, chamfering and clear up, first brush one layer of epoxide-resin glue, CFRP cloth
One layer of package, then one layer of epoxide-resin glue is brushed, CFRP cloth wraps up one layer again, wraps up three layers of CFRP cloth according to this, guarantees filling for glue
Sub-dip profit.Fig. 8 is the overall effect schematic diagram after 2 frame mid-side node of the present embodiment is reinforced.
Disclosed above is only the specific embodiment of the application, and however, this application is not limited to this, any this field
Technical staff can think variation, should all fall in the protection domain of the application.
Claims (11)
1. a kind of reinforcement means of reinforced concrete frame structure alien invasion node, which is characterized in that including the following steps:
(1) prefabricated ECC prefabricated board；
(2) ECC prefabricated board is installed
ECC prefabricated board is pasted in joint cores and Zhou Bianliang, styletable alien invasion, in joint cores and beam-ends using mechanical anchor
Gu；
(3) fiber cloth is pasted in styletable carry out ring packet.
2. a kind of reinforcement means of reinforced concrete frame structure alien invasion node as described in claim 1, which is characterized in that
In step (1), according to node size to be reinforced and arrangement of reinforcement situation, the size, shape and thickness of ECC prefabricated board are determined, and make
Make corresponding template；The position for finding out joint reinforcing bar to be reinforced determines the position of the preformed hole of prefabricated board, and places in a template
Cylindrical body foam identical with required reserved pore size；It will be formed in the mixing good ECC material injection template.
3. a kind of reinforcement means of reinforced concrete frame structure alien invasion node as claimed in claim 2, which is characterized in that
Size, shape and the thickness of the ECC prefabricated board are determined according to shape, the size to reinforcing joint:
Height of the ECC prefabricated board along mast axis direction takes the sum of deck-molding and twice of column section height；
The ECC prefabricated board takes column is wide twice of deck-molding or T-section point is added to take along the width or crisscross joint of beam axis direction
Column width doubles deck-molding；
The prefabricated plate thickness of ECC, or when beam, column alien invasion are concordant, using etc. slabs；Or when beam, column alien invasion be not concordant
When, using non-equal slabs, the prefabricated plate thickness of beam-ends is different from styletable and core space, guarantees that alien invasion is concordant.
4. a kind of reinforcement means of reinforced concrete frame structure alien invasion node as claimed in claim 2, which is characterized in that
The reserved bore dia of the ECC prefabricated board is 18mm, and hole back gauge and spacing are not less than 100mm, and several preformed holes are arranged symmetrically.
5. a kind of reinforcement means of reinforced concrete frame structure alien invasion node as claimed in claim 2, which is characterized in that
The preferred PVA-ECC prefabricated board of ECC prefabricated board, the ECC material by vinal, cement, flyash, fine sand, subtract
Aqua and water are stirred evenly and are made.
6. a kind of reinforcement means of reinforced concrete frame structure alien invasion node as claimed in claim 5, which is characterized in that
The mixing parameter of the ECC prefabricated board be every 1 kilogram of cement in configure 0.80~0.82 kilogram of I grades of flyash, 0.71~
0.73 kilogram of fine sand and 0.5% high efficiency water reducing agent, wherein water-cement ratio is 0.25~0.35, and the volume of the vinal is mixed
Entering amount is 1.8%~2.2%.
7. a kind of reinforcement means of reinforced concrete frame structure alien invasion node as described in claim 1, which is characterized in that
It in step (2), drills in joint cores and beam alien invasion corresponding position, clears up simultaneously, then use reaming bit
Second reaming is carried out, and is cleaned out with air pump；It clears up frame alien invasion joint cores and its one times of periphery beam, column section is high
Beam, the column concrete surface in range, and coated structure glue are spent, ECC prefabricated board is securely pasted on node area；By rear base expanding and base expanding anchor
Bolt various components are tightened, and then anchor bolt is fitted into molding hole and is tightened.
8. a kind of reinforcement means of reinforced concrete frame structure alien invasion node as claimed in claim 2, which is characterized in that
The ECC prefabricated board carries out mechanical anchor in core space and beam-ends by the preformed hole using M16 base expanding and base expanding type anchor bolt, and drilling is deep
Degree is not less than 100mm.
9. a kind of reinforcement means of reinforced concrete frame structure alien invasion node as claimed in claim 7, which is characterized in that
The ECC prefabricated board is only pasted onto the alien invasion of frame joint, ECC prefabricated board center and joint cores using structure glue
Center is overlapped.
10. a kind of reinforcement means of reinforced concrete frame structure alien invasion node as described in claim 1, feature exist
In in step (3), being polished upper and lower styletable package area's concrete surface, chamfering and cleared up, then successively pasted fine
Wei Bu carries out the anchoring of ring packet.
11. a kind of reinforcement means of reinforced concrete frame structure alien invasion node as claimed in claim 10, feature exist
In the stickup height of the fiber cloth is one times of column section height, and width is the height of styletable ECC prefabricated board.
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| CN112575891B (en) * | 2020-12-17 | 2021-10-15 | 西南交通大学 | Low-seismic-loss beam column node based on waveform BFRP connecting plate |
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| CN106481090B (en) * | 2016-10-21 | 2019-06-25 | 上海应用技术大学 | A kind of Shockproof reinforcing method of existing reinforced concrete concrete frame joint |
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