CN209780313U - Node for improving crack resistance of prefabricated concrete frame structure - Google Patents
Node for improving crack resistance of prefabricated concrete frame structure Download PDFInfo
- Publication number
- CN209780313U CN209780313U CN201920181979.5U CN201920181979U CN209780313U CN 209780313 U CN209780313 U CN 209780313U CN 201920181979 U CN201920181979 U CN 201920181979U CN 209780313 U CN209780313 U CN 209780313U
- Authority
- CN
- China
- Prior art keywords
- crack resistance
- frame structure
- channel
- concrete frame
- node
- 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
Abstract
The utility model discloses an improve node of prefabricated assembled concrete frame structure crack resistance ability, the utility model discloses a reserve a plurality of channels in the side concrete protective layer of near roof beam of piece to install the compound material lath of fibre reinforcement, with the crack resistance ability that improves piece department. The utility model discloses near the roof beam cross-section reservation channel and installation lath of piece, the crack resistance and the durability at piece position can be improved, and then the full life service cycle of extension frame construction. The utility model is suitable for a PC frame construction's node is assembled, and the construction is convenient and the effect is obvious, has wide application prospect.
Description
Technical Field
The utility model belongs to the building field relates to prefabricated assembled concrete frame structure (being called for short "PC frame construction"), in particular to improve node of prefabricated assembled concrete frame structure crack resistance ability.
Background
The reinforced concrete frame joint comprises a joint core area where a beam and a column intersect, and an adjacent beam end and an adjacent column end, and plays a role in transferring internal force and maintaining structural integrity in a frame structure.
The PC frame structure has the advantages of good quality, high production efficiency, low labor intensity of workers and the like, and is used for connecting the precast beams and the columns in the node area. Compared with a cast-in-place concrete structure, the connecting part of the PC frame structure is a weak part with durability due to inherent insufficient crack resistance.
the connection form of the PC frame structure can be mainly classified into a wet connection and a dry connection according to the construction method. The wet connection is a mainstream processing mode, namely field operation connection, steel bars, steel plates or bolts extending out of the abutted seam part in advance are welded, lapped or mechanically connected, and then the assembly is realized by pouring concrete or other joint grouting slurry on site. In the method, the precast concrete member and the subsequent cast-in-place concrete are only bonded and cannot be really integrated, the crack at the joint cannot be avoided, and the precast concrete member and the subsequent cast-in-place concrete are easy to form a water leakage channel, so that the precast assembled building material is corroded, even the safety accident is caused, and the hidden danger is caused to the property and life safety of residents. Therefore, it is necessary to take effective anti-crack measures for these patchwork portions.
SUMMERY OF THE UTILITY MODEL
the utility model provides an improve node of prefabricated assembled concrete frame structure crack resistance can, through reserve a plurality of channels in near roof beam side concrete protective layer of piece to installation fibre reinforced composite lath improves the crack resistance ability of piece department, then improves the durability of structure and prolongs its service cycle. The utility model is suitable for an all kinds of beam column nodes of PC frame construction, the construction is convenient and the effect is obvious, has wide application prospect.
the technical scheme of the utility model as follows:
a joint for improving the crack resistance of a prefabricated concrete frame structure comprises a concrete frame joint finished by using the existing assembling method and technology, a plurality of channels reserved in a beam side concrete protection layer near the joints of the joint, and fiber reinforced composite material battens arranged in the channels by using structural adhesive. The structure can strengthen the connection of the prefabricated structures at the two sides of the abutted seam and improve the anti-cracking performance of the abutted seam.
Preferably, the channels provided in the lateral concrete protective layers of each beam are a plurality of channels and, correspondingly, the slats are a plurality of channels.
preferably, the slats are a single web or an integral body made of a plurality of webs glued together by a structural glue.
Preferably, the slats are rectangular in cross-section, with a width bfTaking the total thickness t of 12-16 mmftaking 6-8 mm, wherein the length of the batten is 10-12 b from the abutted seam to the two sides respectivelyfLength. The parameters are determined comprehensively according to experience, the size of a single thin plate strip and the like, and the crack resistance can be better met.
preferably, the channels are symmetrically arranged in parallel along the axis of the beam, the distance between the channels is 80-100 mm in the height direction of the beam, and the distance between the channels and the flange surface of the beam is not higher than 1/4 of the height of the beam and is not lower than 40 mm. So set up can obtain better crack resistance.
Preferably, the dimensions of the channels are determined as follows: taking the length of a batten according to the length of the channel; channel depth lath width bf1.5 times of; the thickness of the batten is taken according to the width of the channelfand (t)f+6 mm). So set up can obtain better crack resistance.
preferably, the slats are mounted with their width in the direction of the depth of the channel and are mounted centrally into the channel by means of structural glue.
The manufacturing method of the node for improving the crack resistance of the prefabricated concrete frame structure comprises the following steps: the method comprises the following steps of designing and manufacturing a lath, reserving a plurality of channels in a beam side concrete protective layer near a spliced seam in the processing process of a prefabricated part, then completing the assembly of concrete frame joints by using the existing assembly method and technology, and finally installing the lath in the channels by using structural adhesive.
And determining the number, the length and the section size of the fiber reinforced composite material lath according to the section size and the reinforcement condition of the beam at the abutted seam.
The length of the strips of the fiber-reinforced composite board and the dimensions thereof were determined as follows:
The cross-section of the slats is preferably rectangular and has a width bfTaking the total thickness t of 12-16 mmfTaking 6-8 mm; the length of the batten extends from the splicing seam to two sides by 10-12 bflength.
The laths are single thin laths; or, when the thickness of a single sheet bar does not meet the set thickness, the multi-sheet bar can be manufactured by sticking a plurality of sheet bars by structural adhesive.
The channel size and arrangement is determined according to the number and size of the slats.
The channels are symmetrically arranged in parallel along the axis of the beam, and the distance between the channels is 80-100 mm along the height direction of the beam; and the distance from the flange surface of the beam is not higher than 1/4 of the height of the beam and is not lower than 40 mm.
The channel dimensions were determined as follows: the length of the channel is taken as the length of the slat; the depth of the channel being taken as the width b of the stripf1.5 times of; the width of the channel is taken as the thickness 2t of the stripfAnd (t)f+6 mm); the inner wall of the channel is processed into a rough surface.
The width of the slat is centered into the channel along the depth of the channel, and by structural glue.
The fiber composite material is selected from carbon fiber, glass fiber, basalt fiber or aramid fiber composite material.
The specific manufacturing method of the structure for improving the crack resistance of the prefabricated concrete frame structure comprises the following steps:
(1) Slat design and fabrication
Determining the number, the length and the section size of the battens according to the size of the beam section at the abutted seam and the reinforcement condition, and manufacturing the battens;
(2) channel design and reservation
Determining the size and the arrangement scheme of the channel according to the number and the size of the battens, and reserving the channel;
(3) Lath installation
firstly, roughening the inner wall of the channel, removing impurities, and then centrally loading the batten into the channel through structural adhesive.
According to the method for manufacturing the node for improving the crack resistance of the prefabricated concrete frame structure, in the step (1), the length of the batten and the section size of the batten are determined according to the size of the section of the beam at the splicing part and the condition of reinforcing bars:
The slats preferably have a rectangular cross-section and a width bftaking the total thickness t of 12-16 mmfTaking 6-8 mm thin plates, and sticking the thin plates by structural adhesive when the thickness of a single thin plate is not enough;
The length of the batten extends from the splicing seam to two sides by 10-12 bfLength.
In step (2), the channel size is determined as follows: taking the length of a batten according to the length of the channel; channel depth lath width bf1.5 times of; the thickness of the batten is taken according to the width of the channelfAnd (t)f+6 mm);
The channel arrangement scheme is as follows: symmetrically and parallelly arranging along the axis of the beam, and taking 80-100 mm of space along the height direction of the beam; the distance from the surface of the beam flange is not higher than 1/4 of the height of the beam and is not lower than 40 mm.
In step (3), the strip width is centered in the channel along the depth of the channel by means of structural glue.
Compared with the prior art, the beneficial effects of the utility model are as follows:
1. The utility model discloses a node for improving crack resistance of prefabricated assembly type concrete frame structure, aiming at the defect of poor crack resistance of the splicing part of the prefabricated assembly type concrete frame structure, the crack resistance of the splicing is improved by reserving a plurality of channels in the concrete protective layer of the beam section at the splicing part and installing fiber reinforced composite material laths;
2. The utility model discloses an adopt and reserve the structure of channel and installation fibre reinforced composite lath on node piece concrete protective layer, can be used to consolidate all kinds of prefabricated assembled structure nodes, application scope is wide, has advantages such as the construction is convenient, the security is high and the durability is good, application prospect is wide.
Of course, it is not necessary for any particular product to achieve all of the above-described advantages at the same time.
Drawings
Fig. 1 is a schematic view of a single fiber reinforced composite veneer strip according to embodiment 1 of the present invention;
Fig. 2 is a schematic view of a plurality of bonded fiber reinforced composite strips according to embodiment 1 of the present invention;
fig. 3 is a schematic view of a rectangular batten for grooving according to embodiment 1 of the invention;
Fig. 4 is an elevational view of the precast concrete frame structure according to embodiment 1 of the present invention before reinforcement;
Fig. 5 is a schematic cross-sectional view of a reinforced beam according to embodiment 1 of the present invention;
fig. 6 is a schematic view of the overall effect of the embodiment 1 of the present invention after reinforcement;
the designations in the figures have the following meanings:
1-thin sheet bar; 2-fiber reinforced composite slats; 3-wood strips; 4-prefabricating a column; 5, prefabricating a beam; 6-a channel; 7-seaming.
Detailed Description
To the problem mentioned in the background art, the inventor finds that the reinforcing method based on the fiber reinforced composite material developed in the last 20 years relies on the advantages of high efficiency, high strength, good durability and the like, is always a hot research topic of the civil engineering community, and how to reasonably apply the reinforcing method to the joint part of the PC structure, thereby effectively improving the problem that the joint is too large to develop, and improving the anti-cracking performance of the structure, the utility model discloses a key.
The utility model discloses a reserve a plurality of channels in near the roof beam side concrete protective layer of piece to installation fibre reinforced composite lath improves the anti cracking performance of piece department, improves the durability of structure and prolongs its service cycle then. The utility model is suitable for a prefabricated all kinds of beam column nodes of assembled concrete frame structure, the construction is convenient and the effect is obvious, has wide application prospect, the utility model discloses a method is generally applicable to all kinds of concrete structure or component seam, and application scope is wide.
The utility model discloses an improve structure of prefabricated assembled concrete frame structure crack resistance ability, reserve the channel promptly in near the roof beam side concrete protective layer of piece and install the compound material lath of fibre reinforcement, concrete manufacturing method includes following step:
(1) slat design and fabrication
determining the number, the length and the section size of the battens according to the size of the beam section at the abutted seam and the reinforcement condition, and manufacturing the battens;
Determining the size of the batten: the slats preferably have a rectangular cross-section and a width bfTaking the total thickness t of 12-16 mmfTaking 6-8 mm; the length of the batten extends from the splicing seam to two sides by 10-12 bfa length; the above dimensioning is suitable for the case of protective layers of between 20 and 25mm, as is usual for beams, columns, etc., in which the channels are arranged;
manufacturing a batten: when the thickness of a single thin plate strip is not satisfied, the thin plate strip can be adhered by structural adhesive. And cutting the thin sheet strips with corresponding lengths according to the required strip size, coating structural adhesive on the surfaces of the thin sheet strips, and sticking a plurality of thin sheet strips to obtain the required strip. The batten used by the utility model has high tensile strength, is always in the elastic stage, and can automatically retract after the external load is unloaded;
(2) Channel design and reservation
determining the size and the arrangement scheme of the channel according to the number and the size of the battens, and reserving the channel;
In particular, the amount of the solvent to be used,
Determining a channel arrangement: all the channels are symmetrically arranged in parallel along the axis of the beam, and the distance between every two channels along the height direction of the beam is 80-100 mm; the distance from the surface of the beam flange is not higher than 1/4 of the height of the beam and is not lower than 40mm, so that an ideal reinforcing effect is achieved;
Determining the size of the channel: taking the length of a batten according to the length of the channel; channel depth lath width bf1.5 times of; the width of the channel is taken and the thickness of the batten is taken to be 2tfAnd (t)f+6 mm);
Reserving a channel: according to the design size, a channel with a specified size is reserved at the corresponding position of the prefabricated part. The channel reservation can be realized by placing a mould (such as a batten) with a corresponding size during concrete pouring, and taking out the concrete after initial setting;
(3) Lath installation
Firstly, chiseling the inner wall of a channel, removing impurities such as floating ash and the like completely, and then, centrally installing a lath into the channel through structural adhesive;
In particular, the amount of the solvent to be used,
Installation preparation: and (4) roughening the inner wall of the channel, and removing floating ash and the like so as to ensure that the concrete is fully occluded with the colloid.
Installing a batten: 2/3 of the volume of the glue of the desired structure is first injected into the channel, and then the width of the strip is inserted centrally into the channel in the direction of the depth of the channel. And injecting the rest structural adhesive to fill the whole channel, and finally wiping off the rest structural adhesive by using a spatula.
The present invention will be further described with reference to the following specific examples. It should be understood that these examples are only for illustrating the present invention, and are not intended to limit the scope of the present invention. In practical applications, the improvement and adjustment made by those skilled in the art according to the present invention still belong to the protection scope of the present invention. All the components not specified in the present embodiment can be realized by the prior art.
Example 1
In the embodiment, a node in a certain side frame is taken as an example, the sectional dimension of the prefabricated column 4 is 600 × 600mm, the sectional dimension of the prefabricated beam 5 is 250 × 400mm (the height of a web is 380mm), the prefabricated column 4 and the prefabricated beam 5 are spliced at the position of the seam 7, and the potential problem of insufficient crack resistance exists at the spliced seam.
as shown in fig. 1-2, according to the condition of the node to be reinforced, 3 thin sheet strips 1 (with width of 16mm and thickness of 2mm) are adhered together to obtain a fiber reinforced composite material strip 2, and the section of the strip 2 has width of 16mm, thickness of 6mm and length of 320mm (the setting position is that the strip extends 160mm from two sides of the seam respectively). The number of the laths 2 is six, the number of the laths is three on each side of the beam section web, the middle lath is arranged along the axis of the beam 5, and the laths at the two ends are arranged along the direction parallel to the axis of the beam 5; the centers of the battens at the two ends are 100mm away from the surface of the beam flange, the center distance of each batten is 100mm, and the centers of the battens are superposed with the center of the joint 7.
As shown in fig. 3 to 4, the pre-groove 6 is formed by firstly manufacturing the batten 3 with the length of 320mm, the width of 12mm and the depth of 24mm on the premise of determining the installation position of the batten. And taking out the wood strips 3 when the concrete is initially set to obtain the channel with the required size.
As shown in fig. 5 to 6, when in field installation, the inner wall of the channel 6 is roughened by a chisel, and the slag floating ash in the channel is cleaned up by an air pump; then 2/3 volume of structural adhesive is injected into the channel 6, and the width of the batten 2 is inserted into the channel 6 along the depth direction of the channel 6; the channels 6 are filled with structural glue, the strips are fully wrapped, and finally the excess glue on the beam surface is wiped off by a spatula.
Fig. 6 is a schematic view of the overall effect of the reinforced node in the side frame of this embodiment 1.
The utility model discloses and above-mentioned embodiment is through reserving a plurality of channels and installing the fibre reinforced composite lath in the roof beam section concrete protective layer of piece department, has strengthened the connection of piece both sides prefabricated construction, has improved piece crack resistance ability.
The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The present invention is limited only by the claims and their full scope and equivalents.
Claims (6)
1. A node for improving the crack resistance of a prefabricated concrete frame structure is characterized by comprising a concrete frame node completed by using an existing assembling method and technology, a plurality of channels reserved in a beam side concrete protective layer near a joint of the node, and fiber reinforced composite material laths arranged in the channels by using structural adhesive.
2. A joint for improving the crack resistance of a precast concrete frame structure as recited in claim 1, wherein said channels are provided in the side concrete protecting layers of each of said beams in plural numbers, and correspondingly, said laths are provided in plural numbers.
3. a joint for improving the crack resistance of a precast concrete frame structure according to claim 1, wherein the slab is a single slab or an integral body made of a plurality of slabs to which structural glue is attached.
4. A joint for improving crack resistance of a precast concrete frame structure according to claim 1, wherein the section of the slab is a rectangular section having a widthb ftaking the total thickness of 12-16 mmt ftaking 6 ~ 8mm, wherein the length of the batten is 10 ~ 12mm from the abutted seam to two sides respectivelyb flength.
5. a node for improving crack resistance of a precast assembled concrete frame structure according ~ claim 1, wherein the channels are symmetrically arranged in parallel along the axis of the girder at intervals of 80 ~ 100mm in the height direction of the girder and at a distance of not more than 1/4 of the height of the girder and not less than 40mm from the flange surface of the girder.
6. A joint for improving the crack resistance of a precast concrete frame structure according to claim 4, wherein the dimensions of the channels are determined as follows: channel length fetching plateThe length of the strip; depth of channel and width of lathb f1.5 times of; channel width batten thickness 2t fand (a)t f+6 mm).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920181979.5U CN209780313U (en) | 2019-02-01 | 2019-02-01 | Node for improving crack resistance of prefabricated concrete frame structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920181979.5U CN209780313U (en) | 2019-02-01 | 2019-02-01 | Node for improving crack resistance of prefabricated concrete frame structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209780313U true CN209780313U (en) | 2019-12-13 |
Family
ID=68794564
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920181979.5U Active CN209780313U (en) | 2019-02-01 | 2019-02-01 | Node for improving crack resistance of prefabricated concrete frame structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209780313U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109610877A (en) * | 2019-02-01 | 2019-04-12 | 上海应用技术大学 | Improve the node and method of prefabricated assembled concrete frame construction cracking resistance |
-
2019
- 2019-02-01 CN CN201920181979.5U patent/CN209780313U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109610877A (en) * | 2019-02-01 | 2019-04-12 | 上海应用技术大学 | Improve the node and method of prefabricated assembled concrete frame construction cracking resistance |
| CN109610877B (en) * | 2019-02-01 | 2023-11-21 | 上海应用技术大学 | Node and method for improving crack resistance of prefabricated concrete frame structure |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN212404825U (en) | Prefabricated plate joint structure with bottom die | |
| CN101603335B (en) | Once formed precast concrete shear wall with heat preserving veneer and production method thereof | |
| CN110258789B (en) | Beam column connecting node with replaceable energy-consumption steel bar and construction method thereof | |
| CN106522441A (en) | Connecting method of prefabricated composite multi-ribbed floor slabs and steel beams of assembly type steel structure house | |
| CN209780313U (en) | Node for improving crack resistance of prefabricated concrete frame structure | |
| CN113833162B (en) | Shear wall structure system with high prefabrication rate and low cost and construction method | |
| CN110863597A (en) | Prefabricated floor slab crack prevention and repair method for assembly type steel frame laminated slab factory building | |
| CN109610877B (en) | Node and method for improving crack resistance of prefabricated concrete frame structure | |
| CN112227404B (en) | Connecting system and connecting method for prefabricated superposed foundation and prefabricated superposed shear wall | |
| CN107035027A (en) | A kind of assembled steel reinforced concrete structure light wt compound external wall panel | |
| CN111749146A (en) | Service-period cracking beam reinforced by steel plate anchoring fiber cloth and reinforcing method thereof | |
| CN217923053U (en) | Elastomer prefabricated filling type telescopic device convenient to install and replace | |
| CN213926983U (en) | Splicing node of prefabricated profiled steel sheet and concrete composite board | |
| CN213234370U (en) | Reinforced structure of uneven joints of outer vertical surfaces of reinforced concrete frame structures | |
| CN211548362U (en) | Novel prefabricated composite floor based on UHPC | |
| CN210712962U (en) | Waterproof structure of assembled structural member | |
| CN103452209A (en) | Double-layer composite slat cast-in-situ internal parting wall structure | |
| CN209924232U (en) | Anti prefabricated superimposed sheet that splits | |
| CN114215249A (en) | Separated seam-connected UHPC-NC laminated slab with shear groove keys and construction method thereof | |
| CN103266699B (en) | Seamless mounting method for integral assembled composite partition walls | |
| CN216109248U (en) | Laminated floor slab | |
| CN110359614A (en) | A kind of compound laminated floor slab and its construction method based on unidirectional longitudinal system | |
| CN104695594B (en) | Superimposed shear wall based on semi-prefabricated super-tough reinforced concrete | |
| CN209799123U (en) | Laminated plate | |
| CN214272528U (en) | Prefabricated interior partition wall connected node |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |