CN104929290B - Large-span steel-reinforced concrete orthogonal-diagonal lattice hollow floor system and preparation method thereof - Google Patents
Large-span steel-reinforced concrete orthogonal-diagonal lattice hollow floor system and preparation method thereof Download PDFInfo
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Abstract
The present invention relates to a kind of large-span steel-reinforced concrete orthogonal-diagonal lattice hollow floor system, building superstructure periphery is isosceles triangle grid, and middle peripherally 45 ° of angles are square empty stomach grid, periphery isosceles triangle right-angle side size a and the long a of isosceles triangle hypotenuse1For a=a1× sin45 ° of relation, i.e. periphery grid a1It is internal to be determined along 45 ° of direction square net a sizes after it is determined that, as the length L of buildingxWith its span LyThe ratio between be more than 1.5 when, using orthogonal-diagonal lattice empty stomach grid arrangement, superstructure can be made to change into bidirectional stress by unidirectional power transmission（45 ° of directions）, so as to reach superstructure uniform force, saving construction material simultaneously reduces construction costs, and traditional large-span frame structure compares, and orthogonal-diagonal lattice hollow floor system concrete saves 25% 30%, saving steels 20% 25%；The empty stomach waffle slab that long-span floor system orthogonal-diagonal lattice laced beam is formed, its empty stomach position is the air-conditioning and line equipment layer of superstructure, significantly saves superstructure thickness.
Description
Technical field
The present invention relates to a kind of armored concrete hollow floor system of long narrow shape plane, specifically, it is related to one kind and is applied to
Superstructure length to（Lx）With spanwise dimension（Ly）The ratio between Lx/LyLarge-span steel-reinforced concrete orthogonal-diagonal lattice during ＞ 1.5 or bigger is on an empty stomach
Superstructure and preparation method thereof, belong to technical field of buildings.
Background technology
Reinforced concrete work for a long time, restricted by traditional structure system, be to superstructure span（18m-30m）
Superstructure, only way is armored concrete primary and secondary girder construction, and superstructure plane as shown in Figure 1, it is grown to size Lx=6×
7.2m=43.2m, its short are span direction Ly=3 × 7.2m=21.6m, using primary-secondary beam arrange superstructure area 43.2m ×
21.6m=933.12m2, superstructure working load 4kN/m2, superstructure concrete grade C30, by designing concrete amount 40.5cm/
m2, it is 378m per floor lid concrete amount3, superstructure steel 122kg/m2, per floor lid steel 113.8T.Traditional structure is not only
Building materials dosage is big, and construction costs is high, its 21.6m Slender R.C.column（700×1800）As real " fertile beam ", not only
In this way, also greatly increasing superstructure thickness, it is included in when by surface layer and air-conditioning equipment, superstructure thickness reaches 1800+700+20=2700,
The floor height of routine building first floor is calculated, this structure has run counter to the basic principle of energy-saving and emission-reduction.
Because being restricted by traditional structure, the less use of multilayer large-span frame structure, and use so-called advanced method, i.e., it is pre-
Prestressed concrete crossbeam, big depth of beam can decline（600×1500）, i.e., 0.3m is reduced per thickness degree, because prestressing force takes
With increase construction costs be not reduced, have no to innovate based on structural system, when span L=（18m-30m）Multilayer superstructure, it is several
It nobody shows any interest in.
The principle of recycling economy three of economic construction of China（Energy-saving and emission-reduction, sustainable development and Economization on land promote ecology
Civilization）, it is desirable to long span building makees multilayer, and inventor proposes in the mid-90 in last century《Steel reinforced concrete shearing force keyed is double
To hollow short taper》（ZL97200102.6）It is a kind of big slab-type apartment building of empty stomach being made up of armored concrete laced beam orthogonal spatial grid
Lid, makes original multilayer（2 layers -4 layers）Large span（18m-30m）The public structural system fat beams and columns with industrial building is changed
Become, former patent is no matter superstructure plane form is square or rectangle, its long side (Lx) and short side (Ly) the ratio between be less than or greater than
1.5, using orthogonal spatial empty stomach grid, i.e. grid crossed node laced beam orthogonal (900) laced beam and side-strut four
Zhou Yiwei orthogonal (900), this orthogonal spatial grid superstructure, when superstructure is square（Lx/Ly=1）Stress is most uniform, respectively accounts for
50%, general orthogonal spatial grid application is in Lx/Ly＜ 1.5 superstructure, works as Lx/LyWhen=1.5, superstructure load 70% is by short (Ly)
Bearing is passed to, only 30%, from long to supporting-point is transmitted to, works as Lx/LyWhen=2, short power transmission is grown to power transmission only up to 87.5%
12.5%, stress is extremely uneven also unreasonable.As superstructure planar dimension Lx/Ly＞ 1.5 or during bigger long narrow shape plane, then use
Orthogonal spatial empty stomach grid, then superstructure stress is extremely uneven, causes waste of material cost to improve.
The content of the invention
The problem to be solved in the present invention is the deficiency for more than, there is provided a kind of large-span steel-reinforced concrete orthogonal-diagonal lattice is on an empty stomach
Superstructure, the defects of to overcome prior art, realize following purpose：
1）, can apply to long edge size LxWith spanwise dimension LyThe ratio between Lx/Ly＞ 1.5 or bigger long narrow shape superstructure are put down
Face.
2）, superstructure can be made to change into bidirectional stress two by unidirectional power transmission（45 ° of directions）, it is equal so as to reach superstructure stress
It is even, save construction material and reduce construction costs, concrete saves 25%-30%, saving steels 20%-25%.
3）, long-span floor system orthogonal-diagonal lattice laced beam formed empty stomach waffle slab, its empty stomach position is the air-conditioning of superstructure
And line equipment layer, significantly save superstructure thickness.
4）, a kind of preparation method of large-span steel-reinforced concrete orthogonal-diagonal lattice hollow floor system is provided.
To solve above technical problem, the present invention uses following technical scheme：Large-span steel-reinforced concrete orthogonal-diagonal lattice is empty
Abdomen superstructure, it is characterised in that：Building superstructure periphery is isosceles triangle grid, middle peripherally 450Angle is square empty stomach
Grid.
A kind of prioritization scheme, the periphery isosceles triangle right-angle side size a and long a of isosceles triangle hypotenuse1For a=a1×
Sin45 ° of relation, i.e. periphery grid a1After it is determined that, inside also determines along 45 ° of direction square net a sizes.
A kind of prioritization scheme, building superstructure are long side（Lx）With short side（LyThat is span）The ratio between Lx/Ly＞'s 1.5 is long narrow
Shape plane.
Based on above large-span steel-reinforced concrete orthogonal-diagonal lattice hollow floor system, the present invention provides a kind of large-span steel-reinforced coagulation
The preparation method of native orthogonal-diagonal lattice hollow floor system, it is characterised in that：The preparation method comprises the following steps：
(1) drawing unwrapping wire is pressed, sets up support；
(2) string and shear connector template are made at superstructure supporting absolute altitude；
(3) colligation lower edge and shear connector reinforcing bar and reinforcing bar is checked and accepted；
(4) casting concrete is to shear connector tip position；
(5) after concrete strength reaches 80%, the mould of wind up grid and plate is installed in bottom of being winded up on shear connector top again
Plate；
(6) assembling reinforcement；
(7) concrete is cast；
(8) after conserving, that is, large-span steel-reinforced concrete orthogonal-diagonal lattice big panel ceiling for storied building on an empty stomach is formed.
Another preparation method of large-span steel-reinforced concrete orthogonal-diagonal lattice hollow floor system described above, it is characterised in that：
The preparation method comprises the following steps：
(1) sets up support by construction drawing unwrapping wire；
(2) is installed the template and reinforcing bar of the upper and lower string of hollow floor system and each part of shear connector by construction drawing；
(3) is in shear connector（Wind up crossover location）, the hole of cast concrete is reserved, from this hole cast-in-place concrete, by
Lower edge is to shear connector again to the grid panel that winds up and wind up, one-time cast-forming.
The present invention uses above technical scheme, compared with prior art, have advantages below：When superstructure length to short it
Compare Lx/LyAfter ＞ 1.5, orthogonal laced beam is shelved for 45 ° by periphery, 45 ° of laced beam periphery arrangement, forms orthogonal-diagonal lattice
Armored concrete hollow floor system, superstructure can be made to change into bidirectional stress two by unidirectional power transmission（45 ° of directions）, so as to reach superstructure
Uniform force, save construction material and reduce construction costs, concrete saves 25%-30%, saving steels 20%-25%；Large span
The empty stomach waffle slab that superstructure orthogonal-diagonal lattice laced beam is formed, its empty stomach position is the air-conditioning and line equipment layer of superstructure, significantly
Degree saves superstructure thickness.
The invention will be further described with reference to the accompanying drawings and examples.
Brief description of the drawings
Accompanying drawing 1 is the structural plan of conventional rebar concrete primary and secondary beam or frame structure system；
Accompanying drawing 2 is the laced beam grid arrangement figure of armored concrete orthogonal-diagonal lattice hollow floor system in the embodiment of the present invention；
Accompanying drawing 3 is the top view that the lower left corner superstructure empty stomach position of accompanying drawing 2 is splitted；
Accompanying drawing 4 is A-A profiles in accompanying drawing 3；
Accompanying drawing 5 is 1-1 node profiles in accompanying drawing 4；
Accompanying drawing 6 is B-B node profiles in accompanying drawing 4.
Embodiment
Embodiment, large-span steel-reinforced concrete orthogonal-diagonal lattice hollow floor system, building superstructure periphery are isosceles triangle net
Lattice, middle peripherally 450Angle is square empty stomach grid, periphery isosceles triangle right-angle side size a and isosceles triangle hypotenuse
Long a1For a=a1× sin45 ° of relation, i.e. periphery grid a1After it is determined that, inside also determines along 45 ° of direction square net a sizes.
It is described in detail by taking the superstructure shown in Fig. 1 as an example, its length direction is per piece Slender R.C.column of 7.2m, often
Piece secondary beam of 3.6m, periphery set concrete connecting-beam and are connected as a single entity with crossbeam, form 43.2m × 21.6m=933.12m2Large area
Superstructure, this traditional structure cause engineering cost high, hinder the architectural engineering development of multilayer large-span.Specific embodiment be by
Fig. 1 structures are changed to Fig. 2 structural plans, i.e. orthogonal-diagonal lattice hollow floor system.
Large-span steel-reinforced concrete orthogonal-diagonal lattice hollow floor system makes according to following steps：
(1) drawing unwrapping wire is pressed, sets up support；
(2) string and shear connector template are made at superstructure supporting absolute altitude；
(3) colligation lower edge and shear connector reinforcing bar and reinforcing bar is checked and accepted；
(4) casting concrete is to shear connector tip position；
(5) after concrete strength reaches 80%, the mould of wind up grid and plate is installed in bottom of being winded up on shear connector top again
Plate；
(6) assembling reinforcement；
(7) concrete is cast；
(8) after conserving, that is, large-span steel-reinforced concrete orthogonal-diagonal lattice big panel ceiling for storied building on an empty stomach is formed.
As shown in Fig. 2 periphery（Lx, Ly）Direction uses concrete isosceles triangle empty stomach grid, inner square grid edge
45 ° of both sides direction is side by side set, such as above-mentioned superstructure plane（933.12m2）By 36 isosceles triangles and 126 positive direction nets
Lattice form rhombus, and it is both the primary structure member of superstructure, is the suspended ceiling modeling of superstructure again.
As shown in figure 3, star section is shear connector section inside superstructure, pentagon is corner shear connector section, six sides
Shape is periphery shear connector section.
As shown in figure 4, armored concrete orthogonal-diagonal lattice hollow floor system, is winded up by cast-in-place concrete（Containing panel）Lower edge and cut
Power key forms, and its square net size a is isosceles triangle right-angle side size a=a1× sin45 °, such as a1=3600, a=
2545.5, in order to ensure its clear height of shear connector shear stiffness（h0）With clear span（B）The ratio between h0/ B≤1, superstructure hollow rate is very big, and one
As between 80%-85%, building cover structure deadweight is while significantly decline, it is ensured that superstructure three-dimensional stress.hFor Open-web Floor Frame
Thickness, typicallyh=(1/25-1/30) L, such as Fig. 4 sizes,h=21600/25=850, highly decline 60%- than Slender R.C.column
53%。
As shown in figure 5, it is cruciform reinforcement concrete shear key sectional dimension and reinforcement detailing, this is to ensure that superstructure winds up
（Containing plate）With the cooperative key member of lower edge.
As shown in fig. 6, being the side view of concrete empty stomach superstructure periphery laced beam, whole armored concrete empty stomach periphery is pressed
Grid a1It is supported on the side bar of periphery, superstructure empty stomach position is architectural to make blind window processing.
Concrete construction method following (1) presses drawing unwrapping wire, sets up support；
(2) string and shear connector template are made at superstructure supporting absolute altitude；
(3) colligation lower edge and shear connector reinforcing bar and reinforcing bar is checked and accepted；
(4) casting concrete is to shear connector tip position；
(5) after concrete strength reaches 80%, the mould of wind up grid and plate is installed in bottom of being winded up on shear connector top again
Plate；
(6) assembling reinforcement；
(7) concrete is cast；
(8) after conserving, that is, large-span steel-reinforced concrete orthogonal-diagonal lattice big panel ceiling for storied building on an empty stomach is formed.
The armored concrete empty stomach grid superstructure of long span building engineering, its mechanical model are one piece of consideration detrusion
Battenboard, and " plate " has point of " two-way slab " and " one-way slabs ", such as reinforced concrete floor, as long side LxWith span LyThe ratio between
More than 2（Lx/Ly≥2）It is defined as one-way slabs.During design arrangement of reinforcement by it is short across（Ly）Internal force carries out arrangement of reinforcement, long to need to only match somebody with somebody by construction
Muscle, plane superstructure L as shown in Figure 1, Figure 2y=21.6m, Lx=43.2m, Lx/Ly=43.2/21.6=2, superstructure load P is in both direction
（x,y）How on earth distribute, P can be represented with equation belowx=P/(1+n3) and Py=【1-（1/1+n3）】P represents that n is length ratio
Value, Fig. 1,2 ratios are n=2, then Px=p/9=0.125p, Py=[1-0.125] p=0.875p, superstructure load 90% along short across transmission,
Only 10% along long to transmission, during such as n=5, short distribution internal force 99.2%, and it is long to distribution internal force 0.8%, now again using orthogonal
It is also unreasonable just to put concrete empty stomach sandwich plate floor, now using structure type of the present invention, be up to it is safe, reasonable, advanced,
Economic requirement.
Under identical span and identical working load, concrete empty stomach sandwich plate floor of the invention and traditional structure ratio
Compared with：Concrete saves 25%-30%, saving steels 20%-25%, empty using armored concrete orthogonal-diagonal lattice for Fig. 1 planes superstructure
The concrete amount of abdomen superstructure is 21.5cm/m2, decline 19cm/m2, rolled steel dosage 71.5kg/m2, decline 50.5kg/m2, use
New floor system, the principles and requirements of national recycling economy three are reached, so that superstructure uniform force, saves building materials and engineering is made
Valency.
It can also be constructed using following preparation method：
(1) sets up support by construction drawing unwrapping wire；
(2) is installed the template and reinforcing bar of the upper and lower string of hollow floor system and each part of shear connector by construction drawing；
(3) is in shear connector（Wind up crossover location）, the hole of cast concrete is reserved, from this hole cast-in-place concrete, by
Lower edge is to shear connector again to the grid panel that winds up and wind up, one-time cast-forming.
One skilled in the art would recognize that above-mentioned embodiment is exemplary, it is in order that ability
Field technique personnel can be better understood from present invention, should not be understood as limiting the scope of the invention, as long as
According to technical solution of the present invention improvements introduced, protection scope of the present invention is each fallen within.
Claims (2)
1. large-span steel-reinforced concrete orthogonal-diagonal lattice hollow floor system, it is characterised in that：Building superstructure periphery is isosceles triangle
Grid, middle peripherally 45 ° of angles are square empty stomach grid；
The periphery isosceles triangle right-angle side size a and long a of isosceles triangle hypotenuse1For a=a1×sin45°；
Building superstructure is long side（Lx）With short side（Ly）The ratio between Lx/Ly＞ 1.5 long narrow shape plane；
The large-span steel-reinforced concrete orthogonal-diagonal lattice hollow floor system makes according to following steps：
(1) drawing unwrapping wire is pressed, sets up support；
(2) string and shear connector template are made at superstructure supporting absolute altitude；
(3) colligation lower edge and shear connector reinforcing bar and reinforcing bar is checked and accepted；
(4) casting concrete is to shear connector tip position；
(5) after concrete strength reaches 80%, the template of wind up grid and plate is installed in bottom of being winded up on shear connector top again；
(6) assembling reinforcement；
(7) concrete is cast；
(8) after conserving, that is, large-span steel-reinforced concrete orthogonal-diagonal lattice big panel ceiling for storied building on an empty stomach is formed.
2. large-span steel-reinforced concrete orthogonal-diagonal lattice hollow floor system, it is characterised in that：Building superstructure periphery is isosceles triangle
Grid, middle peripherally 45 ° of angles are square empty stomach grid；
The periphery isosceles triangle right-angle side size a and long a of isosceles triangle hypotenuse1For a=a1×sin45°；
Building superstructure is long side（Lx）With short side（Ly）The ratio between Lx/Ly＞ 1.5 long narrow shape plane；
The preparation method of the large-span steel-reinforced concrete orthogonal-diagonal lattice hollow floor system comprises the following steps：
(1) support is set up by construction drawing unwrapping wire；
(2) by the template and reinforcing bar of the upper and lower string of construction drawing installation hollow floor system and each part of shear connector；
(3) in the shear connector of crossover location that winds up, the hole for pouring into a mould concrete is reserved, from this hole cast-in-place concrete, by lower edge
To shear connector again to the grid panel that winds up and wind up, one-time cast-forming.
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| CN107514082A (en) * | 2017-09-19 | 2017-12-26 | 贵州大学 | A kind of irregular II types large-span concrete hollow sandwich panel ceiling for storied building and preparation method |
| CN107514081A (en) * | 2017-09-19 | 2017-12-26 | 贵州大学 | A kind of irregular I types large-span concrete hollow sandwich panel ceiling for storied building and preparation method |
| CN109610349B (en) * | 2018-12-29 | 2020-09-25 | 北京工业大学 | PC box girder web plate reinforcing structure with built-in obliquely-woven mesh and method |
| CN111962860B (en) * | 2020-08-19 | 2022-02-15 | 山东金驰建设有限公司 | Design and construction method of shear key assembly type formwork of hollow sandwich plate |
| CN111962675A (en) * | 2020-08-20 | 2020-11-20 | 泰宏建设发展有限公司 | Construction method of large-span special-shaped cast-in-place reinforced concrete open-web truss |
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