CN104652841A - Steel plate cage strengthened reinforced concrete beam structure and preparation method - Google Patents
Steel plate cage strengthened reinforced concrete beam structure and preparation method Download PDFInfo
- Publication number
- CN104652841A CN104652841A CN201510071571.9A CN201510071571A CN104652841A CN 104652841 A CN104652841 A CN 104652841A CN 201510071571 A CN201510071571 A CN 201510071571A CN 104652841 A CN104652841 A CN 104652841A
- Authority
- CN
- China
- Prior art keywords
- expanded metal
- metal lath
- steel plate
- concrete
- beam structure
- 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.)
- Pending
Links
Landscapes
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
The invention discloses a steel plate cage strengthened reinforced concrete beam structure and a preparation method, and belongs to the technical field of strengthening of construction engineering. A steel plate cage is bound to the side face and the bottom surface of a beam plastic hinge region, so a good restriction effect can be provided for concrete, and the concrete can also be prevented from falling prematurely, and the beam ductility is improved. The specific operation steps comprise cutting of the steel plate cage, bending of the steel plate cage, mounting of the steel plate cage and coating of high-performance mortar. By using the structure and the method, the rotation capacity of the beam plastic hinge region can be effectively improved, the ductility of the beam is improved, and the working state of the concrete is improved.
Description
Technical field
The present invention relates to a kind of reinforced concrete beam ruggedized construction, especially a kind of expanded metal lath high performance composite mortar reinforcement of rc beam structure and preparation method, belong to construction work reinforcing technique field.
Background technology
In reinforced concrete beam field of reinforcement, more have increasing section reinforcing method, adhesivebonded bar (steel plate) reinforcing method, the anchor of application at present paste steel reinforcing method, the composite material reinforced method of besides adhibit the fiber and gauze wire cloth method etc.But, such as increase strengthened section method, reinforcement by sticking of sheets etc. and all have that difficulty of construction is large, corrosion resistance and poor durability, change structure shape, costly and increase the shortcomings such as deadweight; And fibrous composite also shows obvious fragility under seismic loading, make component damage more unexpected.Therefore, in the urgent need to a kind of novel reinforced concrete beam ruggedized construction.
Summary of the invention
The technical problem to be solved in the present invention is to provide one can improve reinforced concrete beam bearing capacity and ductility, easy construction and low-cost steel plate cylinder mould reinforcement of rc beam structure, to improve the working condition of reinforced concrete beam lower concrete;
Present invention also offers the preparation method of above-mentioned ruggedized construction.
For solving the problems of the technologies described above, the technical scheme that steel plate cylinder mould reinforcement of rc beam structure of the present invention adopts is as follows:
It comprises U-shaped expanded metal lath, described expanded metal lath is centered around raw steel reinforced concrete beam sides and bottom surface, described expanded metal lath the bottom surface place of raw steel Concrete Beam Reinforced bending after on extend to armored concrete slab basal surface position place, implant on described raw steel Concrete Beam Reinforced surface and have pin, described expanded metal lath is fixed by tied silk and pin colligation, and described expanded metal lath outer setting has screed.
Preferably, described expanded metal lath thickness d is 0.5mm ~ 2mm, size of mesh opening long-pitch
t bfor 12.5mm ~ 50mm, short pitch
t lfor 8mm ~ 18mm.
Preferably, described high performance composite mortar layer thickness is 15mm ~ 30mm.
Preferably, adjacent two pin spacing are not more than 200mm.
Preferably, the colligation spacing of described expanded metal lath lap-joint tied silk is not more than 200mm.
Preferably, the length H of described expanded metal lath gets the higher value of 1.5 times of deck-moldings and 500mm.
Described screed is high performance composite mortar layer.
The present invention utilizes the preparation method of above-mentioned steel plate cylinder mould reinforcement of rc beam, and its step is as follows:
1) raw steel Concrete Beam Reinforced is reinforced position dabbing process, dabbing degree of depth 5mm ~ 10mm, with the dust on hair-dryer cleaning surface, guarantee that concrete surface is solid, free from admixture; Implant pin at concrete surface, pin adopts inorganic anchoring adhesive anchoring;
2) carbon fiber primer host and curing compound are pressed the proportions of 3:1, brush the concrete surface after dabbing uniformly;
3) after the drying of carbon fiber primer primer, expanded metal lath is bent into the outside that U-shaped is enclosed within raw steel Concrete Beam Reinforced, strikes and pound expanded metal lath and make it be close to concrete surface, by tied silk, expanded metal lath and pin colligation are fixed;
4) high performance composite mortar made is spread upon uniformly the outside of expanded metal lath, and repeatedly pressurizes and smear, ensure bubble-free in high performance composite mortar and with former concrete close contact.
Preferably, in described step 4), the collocation method of high performance composite mortar is: the medium sand that carbon fiber face glue, portland cement and 0.25mm sieve aperture sieve is carried out stirring and form thick paste, the parts by weight of portland cement and medium sand get 1:2.
The beneficial effect adopting technique scheme to produce is as follows:
1. protected effect of the present invention is good: from confined concrete concept, by being firmly fixed on the expanded metal lath outside reinforced concrete beam, good effect of contraction can not only be provided to reinforced concrete beam lower concrete, too early the coming off of concrete can also be prevented, improve the ductility of beam;
2. the present invention constructs simply, is easy to install, and does not need Large Construction facility.Be the side and the bottom surface that by tied silk, expanded metal lath are fixed on beam in work progress, and can cut randomly according to scantling, can be completed by common laborer, there is the features such as simple to operate, convenient and quick construction;
3. the present invention has good decay resistance and endurance quality.Because the density of high performance composite mortar is high, effectively resist the various acid of building, the corrosion of salt pair beam, do not need the antirust maintenance that steel bonding method adopts, save fund;
4. the present invention affects little on the outward appearance of structure and shape.Expanded metal lath high performance composite mortar reinforcement of rc beam structure, high performance composite mortar layer is thinner, generally only has 15 ~ 30mm, does not substantially increase deadweight and physical dimension;
5. the present invention is good in economic efficiency, low price.This programme is applied in the plastic hinge region of beam, successful and can not improve construction costs significantly.
6, the present invention's expanded metal lath composite mortar is reinforced reinforced concrete beam, prevents too early the coming off of reinforced concrete beam lower concrete in seismic process, the bearing capacity of reinforcing steel bar concrete beam and ductility, improves test specimen energy dissipation capacity.Compared with ordinary steel silk screen, expanded metal lath has ductility and the toughness of higher tensile strength, better cracking resistance and Geng Gao.
Accompanying drawing explanation
Fig. 1 is the using state structural representation of the present invention at reinforced concrete beam;
Fig. 2 is one of them node schematic diagram in Fig. 1 light plate net C portion;
Fig. 3 is the A-A cross-sectional schematic in Fig. 1;
1. raw steel Concrete Beam Reinforceds in figure, 2, armored concrete slab, 3, expanded metal lath, 4, pin, 5, tied silk, 6, screed.
Detailed description of the invention
Below by drawings and Examples, technical solution of the present invention is described in further detail.
See accompanying drawing 1, accompanying drawing 2 and accompanying drawing 3, this steel plate cylinder mould reinforcement of rc beam structure is: comprise U-shaped expanded metal lath, described expanded metal lath 3 is centered around raw steel Concrete Beam Reinforced 1 side and bottom surface, described expanded metal lath 3 bends at the bottom surface place of raw steel Concrete Beam Reinforced 1, upwards extend to armored concrete slab 2 basal surface position place, implant on described raw steel Concrete Beam Reinforced 1 surface and have multiple pin 4, described expanded metal lath 3 is fixed by tied silk 5 and pin 4 colligation, and described expanded metal lath 3 outer setting has high performance composite mortar layer.The collocation method of the high performance composite mortar wherein in high performance composite mortar layer is: carried out by the medium sand that carbon fiber face glue, portland cement and 0.25mm sieve aperture sieve stirring formation thick paste (the such as desirable 1:1 of the ratio of weight and number of carbon fiber face glue, portland cement, the ratio of weight and number of portland cement and medium sand gets 1:2).This high performance composite mortar adopt commercially available Related product also can, carbon fiber face glue adopt existing product.
During construction, described expanded metal lath 3 thickness d is 0.5mm ~ 2mm, size of mesh opening long-pitch
t bfor 12.5mm ~ 50mm, short pitch
t lfor 8mm ~ 18mm.
The preparation method of above-mentioned steel plate cylinder mould reinforcement of rc beam structure is as follows:
1. dabbing, fixing pin and rinse glue
Raw steel Concrete Beam Reinforced 1 is reinforced position dabbing process, dabbing degree of depth 5mm ~ 10mm, with the dust on hair-dryer cleaning surface, guarantee that concrete surface is solid, free from admixture; Implant pin at concrete surface, pin adopts inorganic anchoring adhesive anchoring; Subsequently carbon fiber primer (or construction structure glue) host and curing compound are pressed the proportions of 3:1, brush the concrete surface after dabbing uniformly.Carbon fiber primer is divided into A, B two type, and wherein A is host, and B is curing compound, is paired during purchase.
2. the cutting of expanded metal lath
The length H of expanded metal lath 3 gets the higher value of 1.5 times of deck-moldings and 500mm.Width get beam sides and bottom surface and, i.e. 2h+b, wherein b is soffit width, and h is beam section height.
3. the bending of expanded metal lath
With the most edge of expanded metal lath length direction for reference line, first measure the height h of breadth of section with tape measure as Article 1 folding line; Again with Article 1 folding line for reference line, measure beam section width degree as Article 2 folding line.Expanded metal lath 3 make shaping after with tape measure, size is checked again, check qualified after carry out the installation of expanded metal lath 3.
4. the installation of expanded metal lath
Expanded metal lath 3 is bent into side and bottom surface that U-shaped is enclosed within beam plastic hinge region, strikes and pound expanded metal lath 3 and make it be close to concrete surface, expanded metal lath 3 and pin 4 colligation are fixed by tied silk 5, colligation spacing is less than 200mm.
5. outside, smear high performance composite mortar
The medium sand that carbon fiber face glue, Portland cement and 0.25mm sieve aperture sieve is carried out stirring and form thick paste, the ratio of cement and sand gets 1:2, forms high performance composite mortar after uniform stirring; The high performance composite mortar made is spread upon uniformly the outside of expanded metal lath, thickness is 15 ~ 30mm, and repeatedly pressurizes and smear, ensure bubble-free in high performance composite mortar and with former concrete close contact.
Expanded metal lath colligation in the side of beam plastic hinge region and bottom surface, can not only be provided good effect of contraction to concrete, can also prevent too early the coming off of concrete by the present invention, improves the ductility of beam.
The above, be only wherein a kind of embodiment of the present invention, also pin can be welded with expanded metal lath.Every above embodiment is made according to the technology of the present invention essence any amendment, change or equivalent structure change, the protection domain of technical solution of the present invention all should be belonged to.
Claims (9)
1. a steel plate cylinder mould reinforcement of rc beam structure, it is characterized in that: it comprises U-shaped expanded metal lath, described expanded metal lath is centered around raw steel reinforced concrete beam sides and bottom surface, described expanded metal lath (3) extends to armored concrete slab (2) basal surface position place on the bending of the bottom surface place of raw steel Concrete Beam Reinforced (1) is backward, implant on described raw steel Concrete Beam Reinforced (1) surface and have pin (4), described expanded metal lath (3) is fixed by tied silk (5) and pin (4) colligation, and described expanded metal lath (3) outer setting has screed (6).
2. require described steel plate cylinder mould reinforcement of rc beam structure according to right 1, it is characterized in that: described expanded metal lath (3) thickness d is 0.5mm ~ 2mm, size of mesh opening long-pitch
t bfor 12.5mm ~ 50mm, short pitch
t lfor 8mm ~ 18mm.
3. require described steel plate cylinder mould reinforcement of rc beam structure according to right 1, it is characterized in that: described high performance composite mortar layer (6) thickness is 15mm ~ 30mm.
4. require described steel plate cylinder mould reinforcement of rc beam structure according to right 1, it is characterized in that: adjacent two pins (4) spacing is not more than 200mm.
5. require described steel plate cylinder mould reinforcement of rc beam structure according to right 1, it is characterized in that: the colligation spacing of described expanded metal lath (3) lap-joint tied silk (5) is not more than 200mm.
6. require described steel plate cylinder mould reinforcement of rc beam structure according to right 1, it is characterized in that: the length H of described expanded metal lath (3) gets the higher value of 1.5 times of deck-moldings and 500mm.
7. require described steel plate cylinder mould reinforcement of rc beam structure according to right 1, it is characterized in that: described screed (6) is high performance composite mortar layer.
8. the preparation method of the steel plate cylinder mould reinforcement of rc beam structure described in any one of claim 1-7, it is characterized in that, it comprises the following steps:
1) raw steel Concrete Beam Reinforced (1) is reinforced position dabbing process, dabbing degree of depth 5mm ~ 10mm, with the dust on hair-dryer cleaning surface, guarantee that concrete surface is solid, free from admixture; Implant pin (4) at concrete surface, pin (4) adopts inorganic anchoring adhesive anchoring;
2) carbon fiber primer host and curing compound are pressed the proportions of 3:1, brush the concrete surface after dabbing uniformly;
3) after the drying of carbon fiber primer, expanded metal lath (3) is bent into the outside that U-shaped is enclosed within raw steel Concrete Beam Reinforced (1), strikes and pound expanded metal lath (3) and make it be close to concrete surface, by tied silk (5), expanded metal lath (3) and pin (4) colligation are fixed;
4) high performance composite mortar made is spread upon uniformly the outside of expanded metal lath, and repeatedly pressurizes and smear, ensure bubble-free in high performance composite mortar and with former concrete close contact.
9. preparation method according to claim 7, it is characterized in that: in described step 4), the collocation method of high performance composite mortar is: the medium sand that carbon fiber face glue, portland cement and 0.25mm sieve aperture sieve is carried out stirring and form thick paste, wherein the ratio of weight and number of portland cement and medium sand gets 1:2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510071571.9A CN104652841A (en) | 2015-02-11 | 2015-02-11 | Steel plate cage strengthened reinforced concrete beam structure and preparation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510071571.9A CN104652841A (en) | 2015-02-11 | 2015-02-11 | Steel plate cage strengthened reinforced concrete beam structure and preparation method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104652841A true CN104652841A (en) | 2015-05-27 |
Family
ID=53244424
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510071571.9A Pending CN104652841A (en) | 2015-02-11 | 2015-02-11 | Steel plate cage strengthened reinforced concrete beam structure and preparation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104652841A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107143151A (en) * | 2017-06-30 | 2017-09-08 | 唐山钢铁集团有限责任公司 | A kind of architectural engineering Vierendeel girder bracing means |
| CN107268790A (en) * | 2016-04-09 | 2017-10-20 | 河南城建学院 | Webmaster concrete and preparation method thereof |
| CN107575038A (en) * | 2017-09-27 | 2018-01-12 | 华南理工大学 | A kind of concrete beam strengthening structure and its construction method that precast hole steel plate is set |
| CN115217347A (en) * | 2022-07-27 | 2022-10-21 | 广东东荣建筑工程有限公司 | Supporting beam carbon fiber reinforcing structure for energy-saving building |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003113672A (en) * | 2001-10-03 | 2003-04-18 | Kajima Corp | Construction method of reinforcing member against earthquake in reinforced concrete structure, sheet-like steel plate with granular material used therefor, and manufacturing method of the same |
| CN102296752A (en) * | 2011-06-09 | 2011-12-28 | 北京工业大学 | Galvanized welded steel wire mesh beam end structure and method for improving ductility of beam end bottom pressure zone |
-
2015
- 2015-02-11 CN CN201510071571.9A patent/CN104652841A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003113672A (en) * | 2001-10-03 | 2003-04-18 | Kajima Corp | Construction method of reinforcing member against earthquake in reinforced concrete structure, sheet-like steel plate with granular material used therefor, and manufacturing method of the same |
| CN102296752A (en) * | 2011-06-09 | 2011-12-28 | 北京工业大学 | Galvanized welded steel wire mesh beam end structure and method for improving ductility of beam end bottom pressure zone |
Non-Patent Citations (3)
| Title |
|---|
| 叶蓁: ""高性能复合砂浆钢筋网加固伸臂梁受剪性能的试验研究"", 《中国优秀硕士学位论文全文数据库，工程科技II辑》 * |
| 孟浩: ""钢筋混凝土梁侧粘钢板网抗剪加固的试验研究"", 《淮南职业技术学院学报》 * |
| 王忠海等: "高强钢绞线网片_聚合物砂浆复合面层加固钢筋混凝土柱的数值模拟分析", 《工程抗震与加固改造》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107268790A (en) * | 2016-04-09 | 2017-10-20 | 河南城建学院 | Webmaster concrete and preparation method thereof |
| CN107143151A (en) * | 2017-06-30 | 2017-09-08 | 唐山钢铁集团有限责任公司 | A kind of architectural engineering Vierendeel girder bracing means |
| CN107575038A (en) * | 2017-09-27 | 2018-01-12 | 华南理工大学 | A kind of concrete beam strengthening structure and its construction method that precast hole steel plate is set |
| CN115217347A (en) * | 2022-07-27 | 2022-10-21 | 广东东荣建筑工程有限公司 | Supporting beam carbon fiber reinforcing structure for energy-saving building |
| CN115217347B (en) * | 2022-07-27 | 2023-10-13 | 广东东荣建筑工程有限公司 | A supporting beam carbon fiber reinforced structure for energy-conserving building |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110318495B (en) | Assembled permanent template superposed FRP rib seawater sea sand recycled concrete beam and manufacturing method thereof | |
| CN104652841A (en) | Steel plate cage strengthened reinforced concrete beam structure and preparation method | |
| CN104775627A (en) | Steel plate net cage reinforced concrete column structure and preparation method | |
| CN102296752B (en) | Galvanized welded steel wire mesh beam end structure and method for improving ductility of beam end bottom pressure zone | |
| CN101691818A (en) | Building strengthening method | |
| CN1356440A (en) | Floor with space structure | |
| WO2019214187A1 (en) | Trc reinforcement method for improving anti-earthquake performance of multi-piece brick masonry wall | |
| CN107327078A (en) | A kind of Novel steel continuous fiber composite reinforcing ECC concrete composite beams and preparation method thereof | |
| CN107304634A (en) | A kind of high strength stainless steel silk screen strengthens ECC reinforced concrete structures | |
| CN201962877U (en) | Reinforcing net for building wall | |
| CN105888132A (en) | Fiber reinforced composite material rib and concrete composite beam | |
| CN104594577A (en) | Steel plate net reinforced reinforcement concrete stair structure and construction method | |
| CN108824696A (en) | A kind of FRP tendons seawater sea sand-UHDCC composite beam and its construction method | |
| CN109138490A (en) | A kind of method and its masonry using NSM-TRC reinforcing masonry structure | |
| CN201554235U (en) | Polymer modified cement mortar reinforcement mesh surface layer reinforcing structure | |
| CN107311571A (en) | The preparation method of nanometer enhancing TRC composites | |
| CN203129623U (en) | Composite strengthening structure for building | |
| CN209066819U (en) | Slurry tool is got rid of in a kind of wall plastering | |
| CN204571339U (en) | A kind of steel plate cylinder mould reinforcement of rc beam structure | |
| CN204571131U (en) | A kind of expanded metal lath reinforced steel concrete staircase structure | |
| CN109469242A (en) | A kind of profiled sheet-regeneration concrete composite floor and its construction method | |
| CN204571340U (en) | A kind of steel plate cylinder mould reinforced steel concrete rod structure | |
| CN202117223U (en) | Beam end structure of galvanized welded steel wire gauze | |
| CN102605968A (en) | Method for reinforcing compression member of masonry structure by means of compounding covering fibers with angle steel | |
| CN202945816U (en) | Brickwork wall between windows and reinforced by high-ductility fiber concrete |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150527 |