CN203808543U

CN203808543U - Concrete column fast reinforcing FRP strengthening part

Info

Publication number: CN203808543U
Application number: CN201420142380.8U
Authority: CN
Inventors: 张海霞; 何禄源
Original assignee: Shenyang Jianzhu University
Current assignee: Shenyang Jianzhu University
Priority date: 2014-03-27
Filing date: 2014-03-27
Publication date: 2014-09-03
Anticipated expiration: 2024-03-27

Abstract

The utility model provides a concrete column fast reinforcing FRP strengthening part. The concrete column fast reinforcing FRP strengthening part is characterized in that the FRP strengthening part has a shape adaptive to that of a concrete column; the FRP strengthening part comprises two parts; overlapping parts capable of being overlapped together are arranged at the jointing positions of the two parts of FRP strengthening part; the overlapping slots are shaped like a stair, a concave-convex buckle or a barb. The utility model aims at popularizing the concrete column reinforcing technology by the FRP strengthening part in the reinforcing field of China, and provides a fast reinforcing technology, a concrete structure can be reinforced to meet the use functions, the construction is facilitated and the pollution is reduced.

Description

Concrete column is reinforced FRP girth member fast

Technical field

The utility model belongs to concrete structure reinforcement field, is specifically applicable to the concrete column in building structure, is particularly useful for the building structure that corrosion resistance and anti-electromagnetic interference are had relatively high expectations.

Background technology

Concrete structure is applied more in Practical Project, it has the advantages such as supporting capacity is high, good integrity, rigidity is large, fire resistance is good, but in the environment that especially chloride ion-containing is higher in corrosive atmosphere, easily there is corrosion in reinforcing bar, cause building, bridge etc. normally to use, and cause certain economic loss.Encased structures in use also exposes some problems: in the exposed externally environment of steel pipe, in use procedure, easily there is the problems such as burn into is deteriorated, particularly in rugged environment, as the steel tube concrete pile of port and pier is easily subject to the erosion of chlorion, marine drilling platform long period of soaking is vulnerable to the erosion of seawater in seawater, the wet environment of tunnel, subway easily causes pipe corrosion etc., just need to take measures to carry out preservative treatment.In addition, modern architecture is gradually towards large span, high-rise future development, the weight of building self is also increasing, adopt lightweight, high-strength constructional materials to reduce the weight of building, and then reach the object that reduces the geological process power that building is subject to, also become gradually the problem that scientific research personnel is concerned about.

Summary of the invention

Utility model object: the utility model provides a kind of FRP of utilization girth member to the method for rapidly reinforcing of concrete column and girth member, its objective is that solution building concrete post in the past holds corrosion-prone problem, existing anti-corrosion measure effect and intensity is bad and constructs the not problem of easy pollution.

technical scheme: the utility model is achieved through the following technical solutions:

Utilize the method for rapidly reinforcing of FRP girth member to concrete column, it is characterized in that: the step of the method is as follows:

When construction, first polished in the concrete column surface needing reinforcement, make its surface irregularity, and with air compressor, concrete column surface debris is removed;

Get FRP girth member, FRP girth member is divided into the two parts that can combine, and every part is the shape adapting with concrete column surface, then uses acetone to carry out wiping prefabricated FRP girth member inner side; Subsequently cementing agent is evenly spread upon to concrete column surface, wherein a part of prefabricated FRP girth member is held in concrete column surface again, itself and cementing agent are fitted tightly, and then the prefabricated FRP girth member of another part is also held in to concrete column surface, lap-joint at two parts FRP girth member processes the overlap joint groove that can overlap, and at overlap joint, cementing agent is evenly smeared at groove place.

The mode of polishing in concrete column surface is as follows: on concrete column surface, utilize Churn drill to carry out digging a pit, hole, etc. of point type, while digging a pit, hole, etc., chopping bit holds down and bores body and concrete column is 45 °～60 ° angles, make concrete column surface form the pit of pit formula, the degree of depth of pit is 3～5mm, the diameter of pit is 5～8 mm, and the spacing between pit is 5～15mm.

3 implement the above-mentioned FRP girth member that utilizes reinforces FRP girth member fast to concrete column special-purpose in the method for rapidly reinforcing of concrete column, this FRP girth member is the shape adapting with concrete column, FRP girth member is two parts, the position of two parts FRP girth member handing-over is provided with the overlap joint groove that can overlap, and overlap joint groove is step structure, concave convex button shape structure or reversed acanthoid structure.

advantage and effect:

The utility model provides a kind of FRP of utilization girth member to the method for rapidly reinforcing of concrete column and girth member, has compared following advantage with traditional concrete structure:

1, good decay resistance; Prefabricated FRP pipe confined concrete can expose or other corrosivity and special adverse environment under use.

2, overall performance is good; Because the linear expansion coeffcient of concrete and FRP is approaching, they are out of shape basic identical after being heated, and the thermal stress that total produces is less, thereby FRP pipe confined concrete can bear violent difference variation.

3, dielectric properties are superior; In electromagnetic field of high frequency, FRP material can be because eddy current effect produces heat as steel, the concrete cracking that causes thermal stress to produce.

4, not affected by electromagnetic wave; Because FRP material is organic material nonmetals, be therefore suitable for doing the device structure of non-magnetic environment requirement.

5, polishing mode is carried out on unique concrete column surface; This tilting sander strictly limits the parameter of pit, makes pit have better attachment.

6, unique FRP girth member two parts bridging arrangement and overlap joint groove structure, make the installation of FRP girth member more convenient, connects more firm.

At present, China is mainly construction aspect for the application of FRP pipe reinforced concrete column,, in work progress, uses FRP pipe as the template of post, concrete is directly built to one-shot forming.For how FRP pipe being applied to existing building is reinforced, research and application few.

The purpose of this utility model is to be promoted in China's field of reinforcement for FRP girth member reinforced concrete column technology, a kind of rapid reinforcement technology is provided, can either have reinforced concrete structure, it has been met and use function, simultaneously again can convenient construction, reduce and pollute.

accompanying drawing explanation:

Fig. 1 is the structural representation of a kind of form of the utility model;

Fig. 2 is the joint form partial enlarged drawing of Fig. 1;

Fig. 3 is half structural representation of FRP girth member used in Fig. 1;

Fig. 4 is the structural representation of the another kind of form of the utility model;

Fig. 5 is the joint form partial enlarged drawing of Fig. 4;

Fig. 6 is half structural representation of FRP girth member used in Fig. 4;

Fig. 7 is the structural representation of the another kind of form of FRP girth member overlap joint groove;

Fig. 8 is the structural representation of another the third form of FRP girth member overlap joint groove;

Fig. 9 is the another kind of form of structure similar to Fig. 7;

Figure 10 is the another kind of form of structure similar with Fig. 8;

Figure 11 is the amplification key diagram of pit polishing mode.

the specific embodiment:below in conjunction with accompanying drawing, the utility model is further described:

The utility model provides the method for rapidly reinforcing of a kind of FRP of utilization girth member to concrete column, and the step of the method is as follows:

As shown in figs. 1 and 4, when construction, first polished in the concrete column needing reinforcement 1 surface, make its surface irregularity, and with air compressor, concrete column 1 surface debris is removed;

Get FRP girth member 3, FRP girth member 3 is divided into the two parts that can combine, every part is the shape adapting with concrete column 1 surface, that is to say that two parts are in conjunction with just in time concrete column can be wrapped later, the concrete shape of every part, as shown in Fig. 3 and 6, then uses acetone to carry out wiping in FRP girth member 3 inner sides; Subsequently cementing agent 2 is evenly spread upon to concrete column 1 surface, wherein half prefabricated FRP girth member 3 is held in concrete column 1 surface again, itself and cementing agent 2 are fitted tightly, and then second half prefabricated FRP girth member 3 is also held in to concrete column 1 surface, lap-joint at two halves FRP girth member 3 processes the overlap joint groove 4 that can overlap, and at overlap joint, cementing agent 2 is evenly smeared at groove 4 places.

The mode of polishing in concrete column 1 surface is as follows: on concrete column 1 surface, utilize Churn drill to carry out digging a pit, hole, etc. of point type, while digging a pit, hole, etc., chopping bit 111 holds down drill bit 111 and is 45 °～60 ° angle R with concrete column 1, make concrete column 1 surface form the pit 222 of pit formula, the angle that keeps brill body and concrete column is in order to make pit form a downward-sloping angle, there are like this 2 benefits, first, smear after cementing agent 2, the cementing agent entering in pit will form integral body with surperficial cementing agent, and because pit is downward-sloping and opening is upward, structure as shown in Figure 9, so, the form that will make whole adhesive layer form the hook of a downward hangnail hangs on concrete column 1 firmly, utilize like this viscous chemical character of cementing agent, and the physical form of tack coat hangnail, greatly strengthened the intensity of the formed bonding of cementing agent, second when smearing cementing agent 2, because the opening of pit tilts upward, so, smearing cementing agent in the process of cementing agent can enter in pit fully, can not cause the phenomenon of outflow, and so on the one hand prevent from causing the waste of cementing agent, guaranteed on the other hand the intensity consumption of cementing agent, once because cementing agent outflow will make adhesion strength impaired.

The degree of depth of pit is 3～5mm, and the diameter of pit is 5～8 mm, and the spacing between pit is 5～15mm.These parameters are all set according to needed intensity, because if the degree of depth of pit is crossed the own structural strength that deeply will affect concrete column, cross the shallow bond effect that affects, spacing between pit is too small can cause solidifying earth pillar surface concrete come off, the excessive same bond effect that affects.

In addition, as being depicted as concrete column, Fig. 3,6,7 and 8 reinforces fast FRP girth member, this FRP girth member is the shape adapting with concrete column, FRP girth member is two parts, the position of two parts FRP girth member handing-over is provided with the overlap joint groove 4 that can overlap, overlap joint groove 4 be the step structure shown in Fig. 3 or 6, the concave convex button shape structure 5 as shown in Fig. 7 or 9 or the reversed acanthoid structure as shown in Fig. 8 or 10, and the reversed acanthoid structure shown in the concave convex button shape structure shown in Fig. 9 and Figure 10 makes construction FRP girth member external surface afterwards more smooth; When step structure improves the intensity of FRP girth member overlap joint, also can make the external surface of lap-joint more smooth; Concave convex button shape structure as shown in Fig. 7 or 9 can further increase the fastness of overlap joint, and 6, reversed acanthoid structure as shown in Fig. 8 or 10 is the best form of intensity of overlap joint.

Described cementing agent 2 is modified epoxy class bicomponent structural adhesive; Described FRP girth member 3 comprises CFRP pipe, CFRP square tube, GFRP pipe, GFRP square tube, BFRP pipe and BFRP square tube.

The utility model work progress is simple, and the engineering time is shorter, and construction cost is lower, and curing period is shorter, and what surrounding environment was caused is of reduced contamination.This utility model is applicable to the concrete column in building structure.Can well apply in the field of reinforcement of concrete column.

Claims

1. concrete column is reinforced FRP girth member fast, it is characterized in that: this FRP girth member is the shape adapting with concrete column, FRP girth member is two parts, the position of two parts FRP girth member handing-over is provided with the overlap joint groove (4) that can overlap, and overlap joint groove (4) is step structure, concave convex button shape structure (5) or reversed acanthoid structure (6).