CN104775627A - Steel plate net cage reinforced concrete column structure and preparation method - Google Patents
Steel plate net cage reinforced concrete column structure and preparation method Download PDFInfo
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- CN104775627A CN104775627A CN201510071529.7A CN201510071529A CN104775627A CN 104775627 A CN104775627 A CN 104775627A CN 201510071529 A CN201510071529 A CN 201510071529A CN 104775627 A CN104775627 A CN 104775627A
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Abstract
The invention discloses a steel plate net cage reinforced concrete column structure and a preparation method, and belongs to the technical field of building engineering reinforcement. A steel plate net is bound at the outer side of a column plastic hinge area, so that the excellent restraint effect can be provided to concrete, and the early falling of the concrete can be prevented to improve the column ductility. The preparation method comprises the specific operation steps of tailoring of the steel plate net, bending of the steel plate net, mounting of the steel plate net and coating of high-performance mortar. The steel plate net cage reinforced concrete column structure can effectively improve the rotating capacity of the column plastic hinge area, enhance the column ductility and improve the concrete working state.
Description
Technical field
The present invention relates to a kind of expanded metal lath high performance composite mortar reinforced steel concrete rod structure and preparation method, belong to construction work reinforcing technique field.
Background technology
In Reinforced Concrete Reinforcement field, 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.
Summary of the invention
The technical problem to be solved in the present invention is to provide one can improve steel concrete columns bearing capacity and ductility and simple steel plate cylinder mould reinforced steel concrete rod structure of constructing, to improve concrete working condition in post;
Present invention also offers the preparation method of above-mentioned steel plate cylinder mould reinforced steel concrete rod structure.
For solving the problems of the technologies described above, the technical scheme that steel plate cylinder mould reinforced steel concrete rod structure of the present invention adopts is as follows:
It comprises expanded metal lath, described expanded metal lath is enclosed in outside reinforced concrete post and at two lateral bucklings at its some angle and repeats overlap joint, the expanded metal lath of this lap-joint is fixed by tied silk colligation, expanded metal lath outer setting has screed, and described expanded metal lath and screed are centered around reinforced concrete post surface and form steel plate cylinder mould.
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, described expanded metal lath lap-joint tied silk colligation spacing is not more than 150mm, and this colligation spacing is the distance of adjacent tied silk in horizontal and vertical both direction.
Preferably, the height H of described expanded metal lath gets the 1.2-1.7 of the maximum value of reinforced concrete post cross section side length b or h doubly.
Preferably, overlap is arranged on the both sides at certain angle of reinforced concrete post, and the length of lap is the half w of face, the place length of side.
Described screed is high performance composite mortar layer.
Utilize the preparation method of above-mentioned steel plate cylinder mould reinforced steel concrete post, its step is as follows:
1) former reinforced concrete post 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;
2) carbon fiber primer host and curing compound are pressed the proportions of 3:1, brush the surface of the reinforced concrete post after dabbing uniformly;
3) after the drying of carbon fiber primer, expanded metal lath is bent into the outside that quadrangle is enclosed within reinforced concrete post, lap is arranged on the both sides at certain angle, strike and pound expanded metal lath and make it be close to concrete surface, by tied silk by expanded metal lath lap with carrying out colligation, in process of binding, pretightning force is applied to expanded metal lath, form firmly quadrangle;
4) high performance composite mortar 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, described high performance composite mortar collocation method 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 ratio of weight and number of portland cement and medium sand gets 1:2.
The beneficial effect adopting technique scheme to produce is:
1, protected effect is good: from confined concrete concept, by being firmly fixed on the expanded metal lath outside steel concrete, can not only provide good effect of contraction to concrete, can also prevent too early the coming off of concrete, improve the ductility of post;
2, construction simple, be easy to install, not needing Large Construction facility, is the outside by tied silk, expanded metal lath being fixed on reinforced concrete post 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, there is good decay resistance and endurance quality: because the density of high performance composite mortar is high, effectively can resist the various acid of building, the corrosion of salt coupled columns, not need the antirust maintenance that steel bonding method adopts, save fund;
4, on the outward appearance of structure and shape impact little: high performance composite mortar is thinner, generally only has 15 ~ 30mm, does not substantially increase deadweight and physical dimension;
5, good in economic efficiency, low price, the present invention is applied in the plastic hinge region of post, successful and can not improve construction costs significantly.
6, the present invention utilizes expanded metal lath composite mortar to reinforce reinforced concrete post, can prevent too early the coming off of concrete in seismic process, the bearing capacity of reinforcing steel bar concrete column 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 post;
Fig. 2 is the partial schematic diagram of I, Fig. 1 light plate net;
Fig. 3 is A-A cross-sectional schematic in Fig. 1;
In figure, 1, expanded metal lath, 2, tied silk, 3, screed, 4, former reinforced concrete post, 5, lap, 6, beam.
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, the structure of the embodiment of the present invention is as follows: it comprises expanded metal lath 1, described expanded metal lath 1 is enclosed in outside reinforced concrete post 4 and at two lateral bucklings at its some angle and repeats overlap joint, the expanded metal lath 1 of this lap-joint is fixed by tied silk 2 colligation, expanded metal lath 1 outer setting has high performance composite mortar layer, and described expanded metal lath and high performance composite mortar layer are centered around reinforced concrete post surface and form steel plate cylinder mould.Wherein the collocation method of high performance composite mortar 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 and carbon fiber face glue adopt commercially available Related product.
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.
Preparation method of the present invention is specific as follows:
1, dabbing and rinse glue
Former reinforced concrete post 4 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; Subsequently by carbon fiber primer (or being construction structure glue) host and curing compound by 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 width B (height H namely in claims) of expanded metal lath 1 gets the maximum value of post cross section b or h of 1.5 times, and the length of overlap joint intersection is 2(b/2+h/2+2 × 5mm), wherein b and h is the post cross section length of side.
3, the bending of expanded metal lath
With the most edge of expanded metal lath 1 length direction for reference line, first measure the half b/2 of breadth of section with tape measure as Article 1 folding line; Again with Article 1 folding line for reference line, measure whole column section height as Article 2 folding line; Further with Article 2 folding line for reference line, measure whole column section width as Article 3 folding line; Further with Article 3 folding line for reference line, measure whole depth of section as Article 4 folding line; Further with Article 4 folding line for reference line, measure whole breadth of section as Article 5 folding line, finally get the half h/2 of depth of section after Article 5 folding line as cutting edge.Expanded metal lath 1 make shaping after with tape measure, size is checked again, check qualified after carry out the installation of expanded metal lath 1.
4, the installation of expanded metal lath
Expanded metal lath 1 is bent into the outside that quadrangle is enclosed within post root plastic hinge region, and lap 5 is arranged on the both sides at certain angle, strikes to pound expanded metal lath 1 and make it be close to concrete surface, and lap-joint's expanded metal lath colligation fixed by tied silk 2, colligation spacing is less than 150mm; In process of binding, certain pretightning force is applied to expanded metal lath 1, form firmly quadrangle, effectively confined concrete.
5, high performance composite mortar is smeared in outside
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 outside and the inner side of expanded metal lath, thickness is 15 ~ 30mm, and repeatedly pressurizes and smear, ensure bubble-free in high performance composite mortar 3 and with former concrete close contact.High performance composite mortar mainly protects expanded metal lath and firmly forms an entirety with reinforced concrete post, and plays a protective role, mainly in the outside of expanded metal lath.
The present invention, by the outside of expanded metal lath colligation in post plastic hinge region, can not only provide good effect of contraction to concrete, can also prevent too early the coming off of concrete, improves the ductility of post.
The above, be only wherein a kind of embodiment of the present invention.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 reinforced steel concrete rod structure, it is characterized in that: it comprises expanded metal lath, described expanded metal lath (1) is enclosed in outside reinforced concrete post and at two lateral bucklings at its some angle and repeats overlap joint, the expanded metal lath (1) of this lap-joint is fixed by tied silk (2) colligation, expanded metal lath (1) outer setting has screed (3), and described expanded metal lath (1) and screed (3) are centered around reinforced concrete post surface and form steel plate cylinder mould.
2. require described steel plate cylinder mould reinforced steel concrete rod structure according to right 1, it is characterized in that: described expanded metal lath (1) 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 reinforced steel concrete rod structure according to right 1, it is characterized in that: described high performance composite mortar layer (3) thickness is 15mm ~ 30mm.
4. require described steel plate cylinder mould reinforced steel concrete rod structure according to right 1, it is characterized in that: described expanded metal lath lap-joint tied silk (2) colligation spacing is not more than 150mm, this colligation spacing is the distance of adjacent tied silk in horizontal and vertical both direction.
5. require described steel plate cylinder mould reinforced steel concrete rod structure according to right 1, it is characterized in that: the height H of described expanded metal lath (1) gets the 1.2-1.7 of the maximum value of the reinforced concrete post cross section length of side (b) or (h) doubly.
6. require described steel plate cylinder mould reinforced steel concrete rod structure according to right 1, it is characterized in that: overlap is arranged on the both sides at certain angle of reinforced concrete post, the length of lap is the half of face, the place length of side.
7. require described steel plate cylinder mould reinforced steel concrete rod structure according to right 1, it is characterized in that: described screed (3) is high performance composite mortar layer.
8. the preparation method of the steel plate cylinder mould reinforced steel concrete rod structure described in any one of claim 1-6, is characterized in that: it comprises the following steps:
1) former reinforced concrete post (4) 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;
2) carbon fiber primer host and curing compound are pressed the proportions of 3:1, brush the surface of the reinforced concrete post after dabbing uniformly;
3) after the drying of building primer, expanded metal lath (1) is bent into the outside that quadrangle is enclosed within former reinforced concrete post (4), lap is arranged on the both sides at certain angle, strike and pound expanded metal lath (1) and make it be close to concrete surface, by tied silk (2) by expanded metal lath (1) lap with carrying out colligation, in process of binding, pretightning force is applied to expanded metal lath (1), form firmly quadrangle;
4) high performance composite mortar is spread upon uniformly outside and the inner side of expanded metal lath, and repeatedly pressurizes and smear, ensure bubble-free in high performance composite mortar and with former concrete close contact.
9. the preparation method of steel plate cylinder mould reinforced steel concrete rod structure according to claim 7, is characterized in that:
Described high performance composite mortar collocation method 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.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106958320A (en) * | 2017-04-24 | 2017-07-18 | 华南理工大学 | A kind of reinforced column tie hoop ruggedized construction and its construction method |
| CN107268790A (en) * | 2016-04-09 | 2017-10-20 | 河南城建学院 | Webmaster concrete and preparation method thereof |
| CN107587724A (en) * | 2017-09-27 | 2018-01-16 | 华南理工大学 | A kind of reinforcement of concrete post structure and its construction method that precast hole steel plate is set |
| CN108798054A (en) * | 2018-05-31 | 2018-11-13 | 昆明理工大学 | A kind of reinforcement means for the enhancing damaged frame column that ECC is combined with reinforced mesh |
| CN111119404A (en) * | 2020-01-17 | 2020-05-08 | 吉林建筑大学 | Method for improving ductility of frame beam end |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN106958320A (en) * | 2017-04-24 | 2017-07-18 | 华南理工大学 | A kind of reinforced column tie hoop ruggedized construction and its construction method |
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| CN108798054A (en) * | 2018-05-31 | 2018-11-13 | 昆明理工大学 | A kind of reinforcement means for the enhancing damaged frame column that ECC is combined with reinforced mesh |
| CN111119404A (en) * | 2020-01-17 | 2020-05-08 | 吉林建筑大学 | Method for improving ductility of frame beam end |
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Application publication date: 20150715 |