CN202672771U - FRP reinforcing rectangular column with corner reinforcement - Google Patents
FRP reinforcing rectangular column with corner reinforcement Download PDFInfo
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- CN202672771U CN202672771U CN 201220338493 CN201220338493U CN202672771U CN 202672771 U CN202672771 U CN 202672771U CN 201220338493 CN201220338493 CN 201220338493 CN 201220338493 U CN201220338493 U CN 201220338493U CN 202672771 U CN202672771 U CN 202672771U
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- frp
- bight
- rectangular column
- column
- chamfering
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Abstract
The utility model discloses an FRP (Fiber Reinforced Plastic) reinforcing rectangular column with a corner reinforcement, which is characterized in that an FRP reinforcing layer (2) of the rectangular column (1) is provided with a prefabricated chamfer (3) and the corner reinforcement (4). The FRP reinforcing rectangular column has the advantages that the use amount of FRP is small, the FRP reinforcing rectangular column is high in reinforcing efficiency and low in reinforcing cost, the FRP reinforcing rectangular column has good bearing capacity and good ductility; and the FRP reinforcing construction accuracy is high, and the construction is simple and convenient.
Description
Technical field
The utility model is mainly concerned with the building structure field in the civil engineering, refers in particular to a kind of FRP reinforcing rectangular column with the bight enhancing that structural column uses of doing.。
Background technology
Fibre reinforced plastics (FRP) ruggedized construction is fast-developing reinforcing technique in recent years.FRP have high-strength light, corrosion-resistant, be easy to the good characteristics such as site operation, adopt FRP that structural column is reinforced, in basic change structure post external form and increasing under the prerequisite of dead load not, increase substantially bearing capacity and the ductility of structural column, thus the reinforcing of building is arranged shortly and transform in obtain using more and more widely.The basic principle of FRP ruggedized construction post is that confined concrete is theoretical: form coupled column behind the structural column outsourcing FRP back-up coat, coupled column produces lateral expansion under the axial load effect, the attaching means of concrete outsourcing (FRP back-up coat) produces tensile stress, provide lateral restraint to the core space concrete, make concrete be in the stress state of three dimension stress, thereby improve the concrete compressive strength of core space and compression deformation ability, so that the bearing capacity of coupled column and ductility improve greatly.
A large amount of buildings that a large amount of built constructions of China, particularly last century 70, the eighties build, according to the current specifications requirement, bearing capacity and the anti-seismic performance of its structural column do not reach requirement, are badly in need of consolidation process.In addition, a large amount of buildings have strengthened structural load owing to use Functional change, and structural column often also needs to reinforce.Huge engineering reinforcement and the transformation field in this market adopts FRP that structure is reinforced often one preferred technique scheme.And a large amount of reinforcing objects is rectangular section column, and this is the main section form of structural column in the building.Large quantity research surface, the bight meeting of rectangular column is so that the FRP back-up coat of outsourcing produces significant stress concentration phenomenon, cause the FRP back-up coat to destroy too early at folding corner region, affect the utilization ratio of FRP and the performance of effect of restraint, have a strong impact on the bearing capacity of structural column and the raising of ductility.Test shows, chamfered is not being carried out in the rectangular column bight, FRP reinforces the bearing capacity that almost can not improve structural column, and FRP reinforces the bearing capacity of rectangular column almost with the linear growth of the increase of chamfering radius of curvature, ductility also significantly improves thereupon, and chamfering has decisive influence to the reinforcing effect that FRP reinforces rectangular column.Therefore, for the rectangular column that adopts FRP to reinforce, the chamfered in bight must be consistent with designing requirement as far as possible.In addition, the breakoff phenomenon of experimental study also shows, the increase of chamfering radius of curvature can improve the stress of FRP and concentrate, but can not eliminate, the destruction position of FRP still mainly occurs in the zone that the chamfering radius of curvature changes, namely the FRP back-up coat takes the lead in the bight occurring destroying, and causes whole back-up coat to lose efficacy.Therefore, across corner is carried out the destruction that local enhancement can effectively postpone the FRP back-up coat, improves utilization ratio and the effect of restraint of FRP, and then improves bearing capacity and the ductility of reinforced column.
At present, adopt FRP to reinforce rectangular column, the main problem that exists is: in the reinforcing design stage, concentrate the reinforcing effect that causes to reduce problem in order to overcome the FRP back-up coat at the stress of reinforced column chamfer site, the way that often adopt to increase the FRP back-up coat number of plies solves, although the bearing capacity of reinforced column and ductility can improve like this, does not in fact improve the stress concentration phenomenon of chamfer site, the utilization ratio of FRP has reduced on the contrary, has caused the reduction of reinforcing efficient/expense ratio; Construction stage at the scene, behind the concrete that cuts the rectangular column bight (take concrete column as example), must across corner carry out the part reparation, requirement moulding chamfering by the design radius of curvature, and this work is at present all by manually finishing, the chamfering radius of curvature of moulding often can't guarantee all to meet design requirement along whole post height, and the actual consolidation effect of FRP is difficult to control, affects structural safety.Therefore, propose a kind of new FRP reinforcing rectangular column technical scheme and job practices and become an urgent demand.
Summary of the invention
The technical problems to be solved in the utility model just is: for the technical problem of prior art existence, the utility model discloses a kind of FRP that strengthens with the bight and reinforce rectangular column, have the FRP consumption few, reinforce that efficient is high, reinforcement cost is low, bearing capacity and the characteristics such as ductility is good, FRP strengthening construction accuracy height, easy construction of reinforced column.
Solution of the present utility model is that a kind of FRP that strengthens with the bight reinforces rectangular column and job practices, it is characterized in that the FRP back-up coat of rectangular column is provided with prefabricated chamfering and bight enhancing.
The described FRP that strengthens with the bight reinforces rectangular column, it is characterized in that described prefabricated chamfering is that plastics, fibre reinforced plastics (FRP) or sheet metal are made.
The described FRP that strengthens with the bight reinforces rectangular column, it is characterized in that it is fibre reinforced plastics (FRP) or sheet metal that described bight strengthens.
The described FRP that strengthens with the bight reinforces rectangular column, and when it is characterized in that described prefabricated chamfering is made by employing fibre reinforced plastics (FRP) or sheet metal, prefabricated chamfering can directly strengthen as the bight.
The described FRP that strengthens with the bight reinforces rectangular column, it is characterized in that described prefabricated chamfering is sticked on the bight of rectangular column by patching material.
The job practices that the described FRP that strengthens with the bight reinforces rectangular column, it is characterized in that: described job practices is undertaken by following dual mode:
Mode one:
The first step: according to the chamfering radius of curvature value of design, cut the concrete (take concrete column as example) in 4 bights of rectangular column to be reinforced, cutting concrete amount will be slightly more than calculated value;
Second step: remove and cut the loose concrete in position, the rectangular column external surface is carried out necessary cleaning and hacking processing;
The 3rd step: patching material is spread upon the bight of rectangular column, then prefabricated chamfering is sticked on the bight;
The 4th step: the interface processing applying material is being treated the external surface of reinforced column;
The 5th step: after the adhesion strength of interface processing material reaches the regulation requirement, first the bight is strengthened the corresponding position that sticks on the prefabricated chamfering of rectangular column by cementing agent, with cementing agent the FRP back-up coat is sticked on the whole external surface of rectangular column again, finish site operation.
Mode two:
The first step: according to the chamfering radius of curvature value of design, cut the concrete (take concrete column as example) in 4 bights of rectangular column to be reinforced, cutting concrete amount will be slightly more than calculated value;
Second step: remove and cut the loose concrete in position, the rectangular column external surface is carried out necessary cleaning and hacking processing;
The 3rd step: patching material is spread upon the bight of rectangular column, then prefabricated chamfering is sticked on the bight, prefabricated chamfering material is that FRP or sheet metal are made, and prefabricated chamfering directly strengthens as the bight;
The 4th step: the interface processing applying material is being treated the external surface of reinforced column;
The 5th step: after the adhesion strength of interface processing material reaches regulation and requires, with cementing agent the FRP back-up coat is sticked on the whole external surface of rectangular column, finish site operation.
Compared with prior art, advantage of the present utility model just is:
1. overcoming the FRP back-up coat concentrates the reinforcing effect that causes to reduce problem at the stress of reinforced column chamfer site.The utility model proposes at chamfer site the bight enhancing is set, the bight reinforcing material can be FRP, also can be sheet metal, by local enhancement, has improved the resistance to tension in bight, has improved bearing capacity and the ductility of reinforced column when FRP destroys in the bight.By local enhancement, even can change the destruction position of FRP, further heighten the ultimate deformation ability of FRP back-up coat.
2. good economy performance.The mode that adopts the bight to strengthen improves the effect of restraint of FRP, than adopting the way that increases the FRP back-up coat number of plies, can significantly reduce the consumption of FRP, has greatly improved reinforcing efficient/expense ratio, has outstanding economy.
3. the accuracy of constructing height.When constructing at the scene, according to design chamfering radius of curvature, select the prefabricated chamfering that matches, adopt patching material prefabricated chamfering directly to be sticked on the bight of rectangular column, the chamfering radius of curvature value that forms meets design requirement fully, and along the post short transverse, whole chamfering uniformity has overcome chamfering radius of curvature by artificial moulding fully and often can't guarantee all to meet design requirement and the unmanageable problem of actual consolidation effect of FRP along whole post height.
4. easy construction.Adopt prefabricated chamfering construction, construction technology is simple, and efficient is far above artificial moulding chamfering.Use as adopting FRP material or sheet metal to make prefabricated chamfering, then can cancel the bight and strengthen, further simplified technique, efficiency of construction is further heightened.
Description of drawings
Fig. 1 is the structural representation that the FRP of the utility model band bight enhancing reinforces rectangular column;
Fig. 2 is the bight detail drawing with the FRP reinforced column of bight enhancing.
Marginal data
1 rectangular column, 2 FRP back-up coats
3 prefabricated chamferings, 4 bights strengthen
5 patching materials, 6 interface processing materials
The bight of 7 rectangular columns.
The specific embodiment
Below with reference to the drawings and specific embodiments the utility model is described in further details.
Embodiment 1:
A kind of FRP that strengthens with the bight reinforces rectangular column, as shown in Figure 1 and Figure 2, it is characterized in that the FRP back-up coat (2) of rectangular column (1) is provided with prefabricated chamfering (3) and bight enhancing (4).
Prefabricated chamfering (3) is that plastics, fibre reinforced plastics (FRP) or sheet metal are made.
It is fibre reinforced plastics (FRP) or sheet metal that the bight strengthens.
When prefabricated chamfering (3) was made by employing fibre reinforced plastics (FRP) or sheet metal, prefabricated chamfering (3) can directly strengthen (4) as the bight.
Prefabricated chamfering (3) is sticked on the bight of rectangular column (1) by patching material (5).
Job practices is undertaken by following dual mode:
Mode one:
The first step: according to the chamfering radius of curvature value of design, cut the concrete (take concrete column as example) in 4 bights (7) of rectangular column to be reinforced (1), cutting concrete amount will be slightly more than calculated value;
Second step: remove and cut the loose concrete in position, rectangular column (1) external surface is carried out necessary cleaning and hacking processing;
The 3rd step: patching material (5) is spread upon the bight of rectangular column (1), then prefabricated chamfering (3) is sticked on the bight;
The 4th step: interface processing material (6) is spread upon the external surface for the treatment of reinforced column;
The 5th step: after the adhesion strength of interface processing material (6) reaches the regulation requirement, first the bight is strengthened (4) stick on the prefabricated chamfering (3) of rectangular column (1) by cementing agent corresponding position, with cementing agent FRP back-up coat (2) is sticked on the whole external surface of rectangular column (1) again, finish site operation.
Mode two:
The first step: according to the chamfering radius of curvature value of design, cut the concrete (take concrete column as example) in 4 bights (7) of rectangular column to be reinforced (1), cutting concrete amount will be slightly more than calculated value;
Second step: remove and cut the loose concrete in position, rectangular column (1) external surface is carried out necessary cleaning and hacking processing;
The 3rd step: patching material (5) is spread upon the bight of rectangular column (1), then prefabricated chamfering (3) is sticked on the bight, prefabricated chamfering material is that FRP or sheet metal are made, and prefabricated chamfering (3) directly strengthens (4) as the bight;
The 4th step: interface processing material (6) is spread upon the external surface for the treatment of reinforced column;
The 5th step: after the adhesion strength of interface processing material (6) reaches regulation and requires, with cementing agent FRP back-up coat (2) is sticked on the whole external surface of rectangular column (1), finish site operation.
Need to prove above embodiment and form of construction work, just a kind of simple form of the utility model embodiment.Under enlightenment of the present utility model, those skilled in the art can propose new embodiment under the prerequisite of not paying creative work, are arranged on the outside etc. of FRP back-up coat (2) as the bight being strengthened (4).These embodiments also belong to the scope of the utility model protection naturally.
Claims (6)
1. a FRP who strengthens with the bight reinforces rectangular column, it is characterized in that the FRP back-up coat (2) of rectangular column (1) is provided with prefabricated chamfering (3) and bight enhancing (4).
2. the FRP that strengthens with the bight according to claim 1 reinforces rectangular column, it is characterized in that described prefabricated chamfering (3) is that plastics, fibre reinforced plastics (FRP) or sheet metal are made.
3. the FRP that strengthens with the bight according to claim 1 reinforces rectangular column, it is characterized in that it is fibre reinforced plastics (FRP) or sheet metal that described bight strengthens.
4. according to claim 1, the 2 or 3 described FRP that strengthen with the bight reinforce rectangular column, when it is characterized in that described prefabricated chamfering (3) is made by employing fibre reinforced plastics (FRP) or sheet metal, prefabricated chamfering (3) can directly strengthen (4) as the bight.
5. according to claim 1, the 2 or 3 described FRP that strengthen with the bight reinforce rectangular columns, it is characterized in that described prefabricated chamfering (3) is sticked on the bight of rectangular column (1) by patching material (5).
6. the FRP that strengthens with the bight according to claim 4 reinforces rectangular column, it is characterized in that described prefabricated chamfering (3) is sticked on the bight of rectangular column (1) by patching material (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220338493 CN202672771U (en) | 2012-07-13 | 2012-07-13 | FRP reinforcing rectangular column with corner reinforcement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220338493 CN202672771U (en) | 2012-07-13 | 2012-07-13 | FRP reinforcing rectangular column with corner reinforcement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202672771U true CN202672771U (en) | 2013-01-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220338493 Withdrawn - After Issue CN202672771U (en) | 2012-07-13 | 2012-07-13 | FRP reinforcing rectangular column with corner reinforcement |
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| Country | Link |
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| CN (1) | CN202672771U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102777051A (en) * | 2012-07-13 | 2012-11-14 | 湖南大学 | Fibre reinforced plastic (FRP) reinforcing rectangular column with corner reinforcement and construction method thereof |
| CN106836647A (en) * | 2017-01-23 | 2017-06-13 | 北京建筑大学 | A kind of reinforcement means of novel small cross-section rectangle reinforced column |
-
2012
- 2012-07-13 CN CN 201220338493 patent/CN202672771U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102777051A (en) * | 2012-07-13 | 2012-11-14 | 湖南大学 | Fibre reinforced plastic (FRP) reinforcing rectangular column with corner reinforcement and construction method thereof |
| CN102777051B (en) * | 2012-07-13 | 2017-08-01 | 湖南大学 | It is a kind of to reinforce rectangular column and construction method with the enhanced FRP in corner |
| CN106836647A (en) * | 2017-01-23 | 2017-06-13 | 北京建筑大学 | A kind of reinforcement means of novel small cross-section rectangle reinforced column |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130116 Effective date of abandoning: 20170801 |