CN102776973A - Composition (floor) slab of steel bar welding orthogonal net rack and concrete - Google Patents

Composition (floor) slab of steel bar welding orthogonal net rack and concrete Download PDF

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Publication number
CN102776973A
CN102776973A CN2011101215223A CN201110121522A CN102776973A CN 102776973 A CN102776973 A CN 102776973A CN 2011101215223 A CN2011101215223 A CN 2011101215223A CN 201110121522 A CN201110121522 A CN 201110121522A CN 102776973 A CN102776973 A CN 102776973A
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China
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concrete
rack
floor
slab
net rack
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CN2011101215223A
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Chinese (zh)
Inventor
陈云波
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陈云波
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Priority to CN2011101215223A priority Critical patent/CN102776973A/en
Publication of CN102776973A publication Critical patent/CN102776973A/en

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Abstract

The invention discloses a composition (floor) slab of a steel bar welding orthogonal net rack and concrete, reinforcement is realized through welding a net rack 1 or a net rack 2 by using rebars, so that the property that the traditional reinforced concrete plate is zero in bearing force before setting of concrete is thoroughly changed, and thus cast-in-place operation of the (floor) slab disclosed by the invention does not require templates and supports. From the situation that reinforcement of the net rack has bearing force before concrete setting, various decorative plates, insulation plates and anti-seismic noise plates can be developed to serve as permanent templates; and due to the principle that bending a plane to a curved surface can increase the rigidity of the plane, the net rack 1 or the net rack 2 is bent into a net rack 3, and various decorative plates, insulation plates and fire-proof plates are fixed on the inner side of the bent net rack 3 by using hanging bars. Concrete with the strength larger than C30 is sprayed in a layering mode. The design and construction of a shell can be greatly expanded by using the composition (floor) slab. As the composition (floor) slab conforms to favorable conditions described by modern three mechanical theories, the bearing force of the composition (floor) slab is increased, and the crack resistance and aseismicity are strengthened due to the strengthening of ductility of the composition (floor) slab.

Description

Reinforcing bar welding orthogonal spatial rack and concrete combination (building) plate

Technical field

The invention belongs to a kind of building structural element, particularly (building) plate, the housing of reinforcing bar welding orthogonal spatial rack and concrete combination are that the development of armored concrete slab is created.

Background technology

On the seismographic record, in the biotic factor of the house harm people that earthquake destroys, the situation of life that injures the people after the destruction of reinforced concrete floor is more.Invention at the earlier 1800s armored concrete slab is universally acknowledged good invention: reinforcing bar is that even matter is high-strength; Concrete is that compressive strength is high; Form armored concrete slab after reinforcing bar and the concrete setting, reinforcing bar mainly receives pulling force, and concrete mainly is stressed; Two kinds of materials complement each other, the barrier of benefiting mutually.Therefore nearly more than one since century, seldom there are expert, scholar to propose to reform Journal of Sex Research and development.The applicant finds from international contract project; The support of in-situ reinforced concrete slab and template are very to take a lot of work with expensive under given conditions; Therefore at first improve from the angle that reduces support and template; Realized a simple reason gradually: traditional steel concrete has no bearing capacity before concrete setting, is zero bearing capacity, therefore needs the load before a large amount of supports and template are come equilibrium freezing.In decades, there are many people on support and template, to carry out technological invention; Obtained certain achievement; But still will support and template, and occur the accident that many cast-in-place slab integrals cave in both at home and abroad, therefore in key project, rebounding again support and template phenomenon raised without restriction have occurred.Reinforcing bar welding orthogonal spatial rack of the present invention and coagulation combination (building) plate; Bearing capacity is just arranged before concrete setting; The orthogonal spatial rack of reinforcing bar welding can bear concrete deadweight and relevant working load, and the most obvious characteristics of the present invention are that in-situ reinforced concrete slab need not support and template.

Get into the work of scientific and technological development company after applicant's retirement, main business is an optimal design, so self has carried out the education again of structure conceptual design again, recognizes that profoundly structure has four elements: beam, plate, post, lateral resistant member.Want structurally to have creation to improve, develop this four elements.

Reinforcing bar welding orthogonal spatial rack and concrete combination (building) plate; No longer be the combination of reinforcing bar and two kinds of materials of concrete, but the combination of structure and structure is the combination of steel work and concrete structure; Therefore its structural advantage is self-evident greater than the combination of material and material; The bearing capacity of this plate, crack resistance, ductility, shock resistance etc. are all superior than traditional armored concrete slab, in the case, have high people to point out: the application patent of invention; Help continuing to create, so the applicant proposes the application of patent of the present invention.

Summary of the invention

The invention of reinforcing bar welding orthogonal spatial rack and concrete combination (building) plate, its rack is seen Fig. 1, rack is normally bilayer, can make three layers as required.Patent of the present invention is the rack of general floor: the double-deck rack that is welded to form by Q235 Φ 6 reinforcing bars, grid plan is of a size of 70 * 70mm, floor height 80mm, orthogonal spatial rack such as the rack 1 of Fig. 1.Be laid on the beam, the spacing of beam is 3600mm, and Fig. 2 is seen on its plane.If in concrete pouring, this moment rack to receive load be concrete deadweight, add the construction load.When thickness of slab is 100mm, concrete deadweight=0.1 * 24KN=2.4KN/m 2, working load=0.5KN/m 2, this moment bar frame square metre load=2.4+0.5=2.9KN/m 2, the reinforcing bar beam of the thin dash area in the cut-away view 2 is regarded its end as freely-supported earlier, and the letter of reinforcing bar beam is tried hard to shown in Figure 3.The reinforcing bar girder span is L=3600mm, and 51 elastic supports are arranged therebetween approximately, for safety when calculating, puts aside 51 elastic supports, the suffered line load q=2.9 * 0.07=0.203KN/m of reinforcing bar beam this moment 2

The basis of reinforcing bar welding orthogonal spatial rack and concrete combination (building) plate

● the intensity of reinforcing bar beam is calculated

The maximal bending moment of reinforcing bar beam is at span centre, M Max = 1 8 Ql 2 = 1 8 × 0.203 × 3.6 2 = 0.329 KN . M

Reinforcing bar beam opposing moment M, spacing between the M=area of reinforcement * reinforced steel bar strength design load * reinforcing bar

Spacing=80mm, Q235 steel design strength=215N/mm 2

∴ M>M MaxIntensity satisfies, M/M Max=0.486/0.329=1.47 representes to have big degree of safety

● the Calculation of Deflection of reinforcing bar beam

Reinforcing bar beam deflection Δ Δ = 5 q l 4 384 EJ

Wherein: E is the steel modulus of elasticity, E=2.06N * 10 5/ mm 2

J is the moment of inertia of reinforcing bar beam, the J=2 * (area of the J+ Φ 6 of Φ 6 * centre of form distance 2)

The J=π r of Φ 6 4/ 4=63.58mm 4, the area of Φ 6=π D 2/ 4=28.26mm 2, centre of form distance=80/2=40mm

J=2×(63.58+28.26×40 2)=90559.16mm 4

Δ = 5 × 203 / 1000 × 3600 4 384 × 2.06 × 10 5 × 9.0559 × 10 4 = 23.79 mm

According to standard: the landing slab flexural member allows amount of deflection<L/150=24mm

The Calculation of Deflection of 24mm>23.79mm ∴ reinforcing bar beam satisfies.

The another kind of computational methods of reinforcing bar beam

Can find out that from Fig. 2 the welded steel fabric frame is continuous; The end that is to say the reinforcing bar beam is not hinged, because the end is retrained to such an extent that almost have no corner by the rack remainder, therefore according to fixed definition; The end of reinforcing bar beam is fixed, and then the letter of reinforcing bar beam is tried hard to shown in Figure 4.

● the intensity of reinforcing bar beam is calculated

Span centre M Max = QL 2 24 = 0.203 × 3.6 2 24 = 0.109 KN . M

Reinforcing bar beam opposing moment M=0.486KN.M,

M M Max = 0.486 0.109 = 4.45 Show that the reinforcing bar beam is very powerful.

● the Calculation of Deflection of reinforcing bar beam

Δ = ql 4 384 EJ = 203 / 1000 × 3600 4 384 × 2.06 × 10 5 × 9.0559 × 10 4 = 4.759 mm

Permission amount of deflection=the 24mm of standard>>4.759mm, 24/4.759=5.04 shows that the reinforcing bar beam is very powerful.

Conclusion:

Φ 6; It is 70mm * 70mm that the reinforcing bar of Q235 material is welded into plane grid; The orthogonal spatial rack of plane and the high 80mm in plane; Can bear the concrete deadweight and the working load of its thickness of slab well, therefore when cast-in-place, need not support and template guaranteeing on the mechanics with the rack arrangement of reinforcement of reinforcing bar welding orthogonal spatial.And potentiality are very big, after patent of the present invention is accomplished, also can create the more invention from this source.

The theoretical foundation of reinforcing bar welding orthogonal spatial rack and concrete combination (building) plate

● fracture mechanics is a new branch of strength theory that forms through a large amount of practices over nearly more than 30 years.Research shows that except that intensity material must have enough toughness just can avoid taking place brittle fracture.In the bearing capacity research of flexural member normal section, very clear and definite: beam with compression steel can improve the ductility in cross section, and vertically compressive reinforcement is many more, and cross section ductility is good more.Coming arrangement of reinforcement with the such steel work of orthogonal spatial rack of reinforcing bar welding is exactly very good two muscle, can improve the toughness of plate.

● the rack of the orthogonal spatial that is welded into reinforcing bar is a space structures; Not only realized arrangement of reinforcement " thin and close " in the plate; And many grids have been formed with space behavior; Formed favourable mechanical condition, met very much three big modern mechanics: the argumentation of fracture mechanics, damage mechanics, Micromechanics: the described material strength theory of the mechanics of materials is to suppose that material is to study on the even continuous basis.Exist defective in real material and the structure.Be inhomogeneous discontinuous, innovation and creation condition for continuous evenly, so the toughness of material can be greatly improved.Micromechanics research microdefect develops into microscopic checks; Since innovation and creation many space structures, the genetic defects of structure is reduced, the chance that develops into microscopic checks so reduces; Thereby strengthened the plastic strain of material and member, what show is toughness.Damage mechanics is considered and is had the crack in the material, is mingled with, and defectives such as bubble, to destroy be a process of deterioration gradually by beginning to be deformed to, and develops into fine crack, develops into macrocrack again and get into the category of fracture mechanics.Bar frame effectively suppresses this deterioration process.The bigger raising of plate ductile performance.

● adopt traditional arrangements of reinforcement such as separate type or bent-up bar; Before concrete does not solidify; Reinforcing bar does not have bearing capacity, and their ground combinations also are reinforcing bar and concrete combination of materials, and the orthogonal spatial rack and the concrete combination of reinforcing bar weldering; Being space structures and concrete combination, is the textural association between steel work and the concrete structure; The combinatorial theory of structure has clearly illustrated that combining structure is superior to separate structures separately, and it suppresses the development of microdefect, has suppressed deterioration process, has developed the ability of stresses re-distribution, makes the bearing capacity of structure, crack resistance, and shock resistance is significantly improved.

Reinforcing bar welding orthogonal spatial rack makes up the cast-in-place of (building) plate with concrete, need not support the method with template, is divided into three types of A, B, C.

Category-A: the characteristic of utilizing rack to carry, be fixed on decorative panel on the rack with hanging muscle, such as wood based panel, the bamboo offset plate, the paper gypsum plank, decorative panels such as fiber reinforced calcium silicate board are seen Fig. 5

Category-B: floor requires the anti-collision noise very strict or warming very strictness, can be fixed on the super light concrete plate on the rack with hanging muscle, and such as aerated concrete panel, GRC aerated concrete panel etc. are seen Fig. 6

The C class: if soffit will make hair side, will do more fitting-out work, with regard to the practice of available Fig. 7, the position that can at the bottom of rack, provide the 10mm protective layer thickness put which floor gauze wire cloth (or plastic wire) so that concrete not spillage be as the criterion.And placing and troweling.

The invention of reinforcing bar welding orthogonal spatial rack and concrete combination (building) plate has promoted the development of shell structure

Shell is the architectural image that the eighties of last century people love, but after the eighties, housing is more and more rare; Be not that people have disliked it, but two reasons are arranged, more time-consuming owing to case design in design; Therefore in economic development period fast, just done less naturally.Mainly in construction, housing is made up of curved surface for second reason, template with support quite time-consuming taking a lot of work, be easy to lose.The invention of reinforcing bar welding orthogonal spatial network frame plate can solve construction fully and go up time-consuming problem of taking a lot of work, and also can promote the simplified design of housing.Why say so and attach patent of invention; Because reinforcing bar welding orthogonal spatial rack arrangement of reinforcement plate is basic patent of invention; Its basis, theoretical foundation have proved that reinforcing bar welding orthogonal spatial rack can carry concrete and working load, and this invention can be used in the housing construction invention fully, increase a job; Bend to the housing shape to rack gradually, this steel work processing factory for certain scale can both do.Because have the plane to be on the mechanics becoming its rigidity of curved surface is the principle that increases, another one is for brake forming better, on the rack of orthogonal spatial, increases the oblique reinforcing bar of some hand welderings, and quantity is not limit.Its practice is as shown in Figure 8; Liner color steel sheet curved slab or other decorative panel; Be fixed on it on curved surface rack with hanging muscle, utilize the complete set technology layering of sprayed mortar to carry out concreting work, solidify the back and do the roof waterproof processing at clean concrete surface; Or other high-tech processing, like solar energy utilization etc.

Description of drawings

Fig. 1 is the phantom drawing of two layers of bar frame 1 and compound steel muscle rack 2; Fig. 2 is arranged on the plan view on the brace summer for bar frame, and wherein thin dash area is the reinforcing bar beam of intercepting; Fig. 3 tries hard to for the letter of the reinforcing bar beam of intercepting; To try hard to be that two ends are fixing to Fig. 4 for the letter of the another kind of computing method of reinforcing bar beam; Fig. 5 is for to use decorative panel to be fixed on the rack with hanging muscle as permanent template, be category-A need not support unformed method; Fig. 6 is that category-B need not support unformed method for to be fixed on the welded steel fabric frame with hanging muscle with lightweight concrete slabs such as gas concrete; Fig. 7 is for need not support unformed method with the C class at the bottom of the several layers gauze wire cloth bag; Fig. 8 need not support unformed method for the development shell structure.

The specific embodiment

The specific embodiment one: combine Fig. 1 to make and double-deckly be welded into its grid plan by Q235 Φ 6 reinforcing bars and be of a size of 70 * 70mm, plane floor height 80mm, orthogonal spatial rack 1; Be arranged on the beam, then with category-A, category-B method with hanging muscle decorative panel, lightweight concrete slabs such as gas concrete are fixed on the rack as permanent template; The C class methods are bag several layers gauze wire cloths at the bottom of rack; Be as the criterion with spillage not, pour into a mould the above concrete of C20 then, need not support and template.

The specific embodiment two: combine Fig. 1,, can make three layers rack 2 according to the specific (special) requirements of plate; Bar diameter can be by Φ 6~Φ 10 less expensives; For well, control with thickness of slab, requires slenderness ratio >=150 of reinforcing bar by the grid floor height by 50 * 50mm~120 * 120mm for the grid plan size.Be arranged on rack on the beam, be fixed on the rack with hanging muscle according to the method for category-A, category-B, C class, the cast-in-place then concrete greater than C20 can be made the reinforced concrete cast-in-situ floor that satisfies specific (special) requirements.Do not support, do not want template.

The specific embodiment three: reinforcing bar welding orthogonal spatial rack and concrete make up (building) plate and are fixed on lightweight concrete slab on the rack or are fixed on PLASTIC LAMINATED on the rack or warming plate and be fixed on the rack with hanging muscle; Method with category-A, category-B is poured into a mould the concrete greater than C20; It after solidifying the floor of superior in quality impact resistance noise; Or the very high floor of fire-protection rating, or the very high floor of insulation grade.

The specific embodiment four: as shown in Figure 8; Bending to hull shape to bar frame becomes crooked rack 3, in the inboard with hanging fixedly color steel sheet of muscle, various decorative panels; Cut apart on the rack after glass brick etc. is fixed on bending; Carry out concrete pouring work with the layering of sprayed mortar complete set technology then, solidify the back and make waterproofing work at clean concrete surface, particularly the solar energy utilization is handled.

Claims (4)

1. with reinforcing bar welding orthogonal spatial rack and concrete combination (building) plate, being welded into its grid plan by Q235 Φ 6 reinforcing bars and being of a size of 70 * 70mm, plane floor height 80mm of bilayer; Orthogonal spatial rack 1; Be laid on the beam, the spacing of beam is 3600mm, can make and need not support without template; Bearing capacity is high, the in-situ reinforced concrete slab that anti-seismic performance is good, ductility is good.
2. with reinforcing bar welding orthogonal spatial rack and concrete combination (building) plate; Make three layers of Q235 reinforcing bar and be welded into orthogonal spatial rack 2; The grid plan size is by 50 * 50mm~120 * 120mm, and the grid plan floor height is by the thick control of floor, reinforcing bar slenderness ratio >=150; Bar diameter is Φ 6~Φ 10, belongs to economic category.Build concrete, can make to support and bear very big load, satisfy the in-situ reinforced concrete slab of antidetonation earthquake intensity high request without template greater than C30.
3. according to claim 1 and claim 2, be fixed on various decorative panels on the welded steel fabric frame with hanging muscle according to Fig. 5, make permanent template.According to Fig. 6; With hanging muscle lightweight concrete slabs such as aerated concrete panels, be fixed on the rack, it is high to make the anti-collision noiseproof feature; What heat-insulating property was high need not support unformed cast-in-situ floor; According to Fig. 7, wrapping the rack bottom with the several layers gauze wire cloth, make and need not support unformed concrete cast-in-situ floor of making any decoration.
4. according to claim 1 and claim 2, according to Fig. 8 double steel bar rack 1, compound steel muscle rack 2; Become the housing curved surface gradually and become crooked rack 3; Be fixed on various decorative panels on the rack with hanging muscle, carry out concreting work, realized that housing is cast-in-place without template with the layering of sprayed mortar complete set technology; The condition that need not support; Solidify the back and make the waterproofing work layer at clean concrete surface, also can carry out the processing of solar electrical energy generation heating, this invention can impel the housing great development.
CN2011101215223A 2011-05-12 2011-05-12 Composition (floor) slab of steel bar welding orthogonal net rack and concrete CN102776973A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103352563A (en) * 2013-07-16 2013-10-16 上海建工集团股份有限公司 Self plate-bearing type steel bar mesh support combined template and construction method thereof
CN106284786A (en) * 2015-05-21 2017-01-04 海南华磊建筑设计咨询有限公司 A kind of beams and slabs

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103352563A (en) * 2013-07-16 2013-10-16 上海建工集团股份有限公司 Self plate-bearing type steel bar mesh support combined template and construction method thereof
CN103352563B (en) * 2013-07-16 2016-05-04 上海建工集团股份有限公司 The board-like bar frame gang form of self-supporting and construction method thereof
CN106284786A (en) * 2015-05-21 2017-01-04 海南华磊建筑设计咨询有限公司 A kind of beams and slabs

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Application publication date: 20121114