CN101614052B - Right hexagonal steel-concrete combined hollow double lattice floor and manufacturing method thereof - Google Patents

Abstract

The invention discloses a regular hexagonal steel-concrete composite hollow double grid beam floor and a manufacturing method thereof. The floor is composed of a frame formed by a hexagonal column net to form six sides of the regular hexagon of the floor, and its diagonal The length L is 30 meters ≤ L ≤ 48 meters. Steel-concrete composite hollow beams are connected within the framework of the hexagonal column network, and the steel-concrete composite hollow beams are parallel to each side of the hexagon and intersect in pairs to form an internal three-dimensional structure. The steel-concrete composite vierendeel beam has a large regular triangular grid crossing to each other, and the structural height of the steel-concrete composite vierendeel beam is 20 to 24 times the length of the diagonal line L; in each large regular triangular grid, there is a three-way crossing grid. The densely ribbed beams, the three-way intersecting densely ribbed beams form a small regular triangle grid, and the concrete floor slab is covered on the large and small regular triangle grids. The invention has the advantages of good structural integrity, small structural height, less space occupied, less concrete and steel consumption, etc., and is especially suitable for building large-span polygonal planes and multi-layer multifunctional halls.

Description

Regular hexagonal steel-concrete composite hollow double grid beam floor and its manufacturing method

technical field

The invention relates to a regular hexagonal steel-concrete combined empty-web double-grid beam floor and a manufacturing method thereof, belonging to the technical field of large-span multi-layer reinforced concrete floors.

Background technique

The rapid development of my country's economic construction and social-related industries has driven the development of cultural undertakings. There are more and more multi-functional halls for large-scale theatrical performances and activities; It is becoming more and more important. From the plane analysis of the multi-functional (including performance and conference) halls with 600 to 1200 seats, the plane of the regular hexagon is better than the square and rectangular planes. When the diagonal span of the regular hexagon is L=36 meters When the hall area is 842 square meters, about 650 seats can be set; when the diagonal span L=48 meters, the hall area is 1496 square meters, and about 1200 seats can be set. For example, the building has three floors and a hexagonal long-span floor (two floors). Due to its large service load (more than 3.5kn per square meter), the selection of the structure is very important. The conventional reinforced concrete frame structure will not only cause fat beams For fat columns, the amount of concrete and steel has increased sharply. For example, when the diagonal span L=36 meters, the minimum cross-section of the frame beam is 1000×3000 (L/12) and the minimum cross-section is 800×2400 (L/15). Not only the amount of concrete and steel Large, the structural height almost accounts for the height of a floor. If a reinforced concrete three-way densely ribbed grid plate is used, when the side length of the triangle is 1.8 meters, due to the force in the three-dimensional space, the structural height h=1m (L/36), the cross-section of the densely ribbed beam is 400×1000, and the converted thickness of the concrete is per square meter 75cm, the design value of the structural self-weight is over 2250 kg per square meter. Although the structural height is the smallest, the amount of concrete and steel is large and the cost is high, so it is not the best solution. If a hexagonal steel-concrete three-way composite grid structure is used, the amount of steel used will decrease, but the height of the structure is still very high. The cost of rust prevention, fire protection and ceiling suspension will increase. For the multi-functional art hall with regular hexagonal diagonal long-span (30 meters ≤ L ≤ 48 meters) floor area ranging from 842 square meters to 1496 square meters, choose a "safe, reasonable, advanced and economical The "floor structure form" has prompted architectural structural engineers to explore new structural systems to meet the needs of economic and cultural construction and development.

Contents of the invention

The object of the present invention is to provide a regular hexagonal steel-concrete composite hollow double grid beam floor with reasonable structure, small structural height, and less concrete and steel consumption, and its manufacturing method, so as to overcome the deficiencies in the prior art .

The present invention is achieved in this way: the manufacturing method of the regular hexagonal steel-concrete combined hollow double grid beam floor of the present invention is that the planar shape of the floor is a regular hexagon, and the frame formed by the hexagonal column network is composed The six sides of the regular hexagon of the floor, the diagonal length L of the regular hexagon is 30 meters ≤ L ≤ 48 meters, steel-concrete composite hollow beams are connected in the frame of the hexagonal column network, and the steel-concrete Composite vierendeel beams intersect each side of the parallel hexagon two by two to form a large regular triangular grid of steel-concrete composite vierendeel beams with internal three-way crossing. The structural height of the intersecting steel-concrete composite vierendeel beam is 1/20-24 of the length L of the hexagonal diagonal; Reinforced concrete three-way intersecting densely ribbed beams are cast on-site in a large regular triangular grid to form a small regular triangular grid of three-way intersecting reinforced concrete densely ribbed beams. The triangular double grid structure with constant structural height is formed by the small regular triangular grid of reinforced concrete densely ribbed beams composed of three-way intersections connected in the large regular triangular grid.

When making a steel-concrete composite hollow beam with a large regular triangle grid, the channel-shaped steel plate is used as the pouring steel formwork for the lower rib beam of the hollow beam, and the reinforced concrete is poured on site after pinning the steel bars on the steel formwork to form a steel-concrete composite hollow beam The lower rib of the beam and the upper rib beam of the steel-concrete composite vierendeel beam are composed of three-way intersections of reinforced concrete with rectangular cross-sections, and the upper rib beam and the lower rib beam are connected with reinforced concrete members at intervals to form a steel-concrete composite Fasting type large mesh.

When the upper ribs of the above-mentioned large regular triangular grids are connected to make the three-way intersecting small regular triangular grids of reinforced concrete densely ribbed beams and floor slabs, the phosphogypsum formwork is used as the formwork for pouring densely ribbed beams and concrete floor slabs, and the steel bars are poured on site. The ribbed beams and concrete floor slabs are poured by means of concrete, so that the phosphogypsum formwork is connected with the poured ribbed beams and concrete floor slabs as a whole.

A regular hexagonal steel-concrete combined hollow double grid beam floor of the present invention is: the planar shape of the floor is a regular hexagon, and the six sides of the regular hexagon of the floor are formed by a hexagonal column network Composition, the diagonal length L of a regular hexagon composed of hexagonal column nets is 30 meters ≤ L ≤ 48 meters; steel-concrete composite hollow beams are connected in the hexagonal column nets, steel-concrete composite hollow beams The three-way intersection forms a large regular triangular grid, and the structural height H of each steel-concrete composite vierendeel beam is the same as 20 to 24th of the diagonal length L of the regular hexagon; The reinforced concrete densely ribbed beam connected by the upper rib beam of the steel-concrete composite hollow beam, and the three-way cross connection of the densely ribbed beam forms the small regular triangle grid of the reinforced concrete densely ribbed beam. The large and small triangular grids are covered with concrete floor slabs.

The size of the above-mentioned large regular triangle mesh is determined according to the diagonal span of the regular hexagon. If the diagonal span L=36m, each side length=36/4=9m of the big regular triangle mesh, then there are 24 in the regular hexagon Large regular triangle grid; if L=48m, each side length of the big regular triangle grid=48/6=8m, then be provided with 54 big regular triangle grids with a side length of 8m in the regular hexagon.

The side length of the above-mentioned small regular triangular grid is 1/5 of the side length of the big regular triangular grid.

The steel-concrete composite hollow beam is composed of upper rib beam, lower rib beam and connecting member. There is an empty web between the upper rib beam, lower rib beam and connecting member, and it is connected at the bottom of the lower rib beam of the steel-concrete composite hollow beam. There are channeled steel plates.

The channel-shaped steel plate is integrated with the concrete of the lower rib beam of the steel-concrete composite vierendeel beam through high-strength bolts.

Both the surface of the ribbed beam and the bottom surface of the concrete floor slab are covered with a phosphogypsum formwork used as a pouring formwork.

The hollow shape of the steel-concrete composite hollow beam is an octagonal hollow.

Due to the adoption of the above-mentioned technical scheme, the entire floor of the present invention is a large equilateral triangle formed by steel-concrete composite hollow beams whose structural height is only 20 to 24th of its span (i.e. the length of the diagonal line of the regular hexagon). The grid and the triangular double grid structure formed by the combination of the small regular triangular grid composed of densely ribbed beams with a structural height of 0.25 to 0.35 meters and the floor slab are set on the lower rib beam of the steel-concrete composite vierendeel beam The groove-shaped steel plate is formed to form the steel plate and concrete lower rib beam member (mainly tensioned), and in order to reduce the structural weight and facilitate the layout of indoor horizontal air-conditioning pipes, the abdomen is hollowed out to form an octagonal hollow, making the structure self-heavy Amplitude decline; because the lower rib beam of the steel-concrete composite vierendeel beam of the present invention is a channel-shaped steel plate and reinforced concrete composite member, the converted moment of inertia value of the vierendeel beam is about 15% higher than that of the non-composite member of the lower rib beam. %about. Because the self-weight of the structure of the present invention is reduced and the structural rigidity (EI) is increased, the purpose of saving building materials and reducing engineering cost is achieved under the condition of ensuring structural rigidity and strength. In addition, according to the actual usage and test analysis, for a multi-functional (including performance and conference) hall with 600 to 1200 seats, the plane of the floor is a regular hexagonal plane, which is better than a square and rectangular plane. When the diagonal span is 36 meters, the hall area is 842 square meters and can accommodate about 650 seats; when the diagonal span is 48 meters, the hall area is 1496 square meters and can accommodate about 1200 seats. Under the premise of "safety, rationality, advancedness and economy", the present invention enables the structure to bear force in three-dimensional space, has small structure height, good spatial integrity, small amount of building main materials (concrete and steel), and simple and easy construction. The large regular triangle grid and the small regular triangle grid formed by the structure of the present invention are superimposed to form a double grid ceiling structure with rich rhythm. It is one of the best forms of multi-storey floor structure with large horizontal span (that is, the diagonal span is 30-50 meters). Therefore, compared with the prior art, the present invention not only has the advantages of reasonable structure, higher structural strength, smaller structural height and less building space, but also has the advantages of less concrete and steel consumption, and Since the present invention adopts the phosphogypsum formwork used as pouring formwork on the two sides of the rib beam on the steel-concrete composite vierendeel beam, the outer surface of the dense rib beam and the bottom surface of the concrete floor slab, this not only reduces the engineering The cost is low, waste utilization is realized, and it also has the advantages of fire prevention and reducing the amount of ceiling decoration work. The invention is particularly suitable for use in large-scale multi-layer multifunctional cultural halls with polygonal plane buildings and large spans.

Description of drawings

Fig. 1 is a floor plan structure schematic diagram of the present invention;

Fig. 2 is the enlarged schematic view of the partial structure of part I of Fig. 1;

Fig. 3 is a schematic cross-sectional structure diagram of A in Fig. 2;

Fig. 4 is the schematic diagram of the cross-sectional structure of B in Fig. 2;

FIG. 5 is a schematic cross-sectional structure diagram of C in FIG. 2 .

Detailed ways

Embodiment of the present invention: when constructing a multi-functional cultural hall with a large span of 3 to 5 floors, the floor is preferably carried out by using the method for making a regular hexagonal steel-concrete combined hollow double grid beam floor of the present invention Make, be about to make the plane shape of floor cover into regular hexagon, adopt hexagonal reinforced concrete frame structure to form six sides of regular hexagon of this regular hexagonal floor, and make the diagonal length L of this regular hexagon ( That is, the span) is 30 meters ≤ L ≤ 48 meters, in the closed regular hexagon formed by the hexagonal reinforced concrete frame, the steel-concrete composite vierendeel beams are respectively arranged along the three directions parallel to the corresponding two sides of the regular hexagon, For example, when L=36m, three steel-concrete composite vierendeel beams are arranged in parallel at equal distances in each direction, so that the nine steel-concrete composite vierendeel beams are cross-connected in a closed regular hexagon to form 24 large regular triangular networks The height H of each steel-concrete composite vierendeel beam is made the same, and its height is controlled at 20 to 24th of the diagonal length (ie span) L of the regular hexagon (ie L/24≤H≤L /20); Then, in each large regular triangular grid, according to the three directions parallel to each side of the large regular triangular grid, four densely ribbed beams are set at equal distances, a total of twelve densely ribbed beams, each large regular triangular Twelve densely ribbed beams in the grid are intersected and connected with each other on the same plane and intersected with the upper ribbed beams of steel-concrete composite vierendeel beams to form 25 small regular triangle grids. The height h of each densely ribbed beam is made The same and controlled at 0.25 to 0.35 meters; the concrete floor slab is covered on the large regular triangle grid and the small regular triangle grid composed of steel-concrete composite hollow beams and dense rib beams to obtain regular hexagonal steel-concrete composite hollow double nets Grid beam floor; when making steel-concrete composite vierendeel beams, channel-shaped steel plates are used as the pouring formwork for the lower rib beams of vierendeel beams, and pins are pre-made on the channel-shaped steel plates, and then the steel is poured by pouring reinforced concrete on site. -Concrete composite hollow beam, the channel steel plate is connected with the lower rib beam of the poured steel-concrete composite hollow beam as a whole, so as to manufacture the steel-concrete composite hollow beam; The gypsum formwork or gypsum formwork is used as a formwork for pouring densely ribbed beams and concrete floor slabs, and the densely ribbed beams and concrete floor slabs are poured by in-situ pouring of reinforced concrete, so that the phosphogypsum formwork or gypsum formwork and the poured dense The rib beam and the concrete floor slab are connected as a whole, which can play the role of thermal insulation.

During concrete construction implementation, make according to the structure of the regular hexagonal steel-concrete combined empty-web double-grid beam floor of the present invention, promptly process out channel-shaped steel plate 4 in factory earlier, install on channel-shaped steel plate 4 then as The lengthened high-strength bolts or pins 5 for the pins are reserved, and the planar shape of the floor is made into a regular hexagon. The regular hexagon is composed of reinforced concrete frame structures connected with each other, and steel-concrete composite hollow beams are used in the regular hexagon 1 The three-way cross connection forms a large regular triangle grid, and the diagonal length (ie span) L of the hexagon is controlled within the range of 30 meters ≤ L ≤ 48 meters; the size of the big regular triangle grid is determined according to the diagonal span of the regular hexagon , if the diagonal span L=36m, each side length=36/4=9m of the large regular triangular grid, then there are 24 large regular triangular grids in the regular hexagon; if L=48m, the large regular triangular grid The length of each side = 48/6 = 8m, then there are 54 large regular triangle grids with side length 8m in the regular hexagon; when the diagonal span L = 36m, the steel-concrete composite vierendeel beam 13 To cross, that is, three in each direction, a total of nine steel-concrete composite vierendeel beams 1 and the reinforced concrete frame structure on the six sides of the regular hexagon are connected in three directions to form 24 large regular triangle grids, and each steel-concrete The height H of the concrete composite hollow beam 1 is made equal and is 1/20-24 of the length L of the diagonal line of the regular hexagon. -2 and the connecting member 1-3 are poured into a whole reinforced concrete connection, when making the steel-concrete composite hollow beam 1, between the upper rib beam 1-1, the lower rib beam 1-2 and the connecting member 1-3 Set the octagonal hollow 1-4 at equal distances, and use the channel-shaped steel plate 4 with lengthened high-strength bolts or pins 5 in advance as the pouring of the lower rib beam 1-2 of the steel-concrete composite hollow beam 1 Formwork, after the lower rib beam 1-2 is poured and formed, its concrete is connected with the channel steel plate 4 as a whole; Four densely ribbed beams 2 are arranged equidistantly in the three directions on each side of the grid, so that the twelve densely ribbed beams 2 in each large regular triangle grid cross in three directions on the same plane to form a reinforced concrete densely ribbed small regular beam. Triangular grid, each large regular triangular grid has 25 small regular triangular grids; the structural height h of the densely ribbed beam 2 forming the small regular triangular grid is controlled within the range of 0.25 to 0.35 meters, and the small regular triangular grid The side length of lattice is 1/5 of the side length of large regular triangular grid (for example: when the side length of big regular triangular grid is 9m, then the side length of small regular triangular grid is 9m/5=1.8m, as large triangle When side length is 8m, the side length of 5 equally divided small regular triangle grids is 8m/5=1.6m.There are 25 little regular triangle grids in the big regular triangle grid of 9m side length.According to regular hexagon diagonal The span is different, and the floor is composed of large and small regular triangular grids with different numbers and heights to form a double grid structure); then the steel- The concrete composite hollow beam 1 and the densely ribbed beam 2 are covered with the cast-in-place concrete floor slab 3, and the phosphogypsum formwork 6 is used as the pouring template when pouring the reinforced concrete densely ribbed beam 2 and the concrete floor slab 3, so that the phosphogypsum formwork 6 is integrated with the concrete of the poured ribbed beam 2 and the concrete floor slab 3, which can play the role of thermal insulation; at the same time, it can also hang paper-faced gypsum boards on the lower part of the small regular triangle grid to strengthen the floor. The heat preservation and heat insulation effect of the cover.

Above-mentioned phosphogypsum formwork 6 can adopt traditional gypsum formwork to replace.

Claims (6)

1. the preparation method of a regular hexagon steel-concrete combined hollow double lattice floor, it is characterized in that: the flat shape of superstructure is a regular hexagon, form orthohexagonal six limits of superstructure by the formed framework of hexagon post net, this orthohexagonal catercorner length L is 30 meters≤L≤48 meter, in the framework of hexagon post net, be connected with steel-concrete composite open-web beam, and steel-concrete composite open-web beam each limit of parallelepiped respectively intersects in twos, form steel-big equilateral triangle grid of concrete composite open-web beam that inner three-dimensional is intersected, each limit length of side of this big equilateral triangle grid equates that with hexagon post net spacing the structure height of steel-concrete composite open-web beam that three-dimensional is intersected is got 1/20th～24 of hexagon catercorner length L; In each big equilateral triangle grid, in-situ casting steel concrete three-dimensional is intersected close girt strip in the big equilateral triangle grid of forming according to the last girt strip of steel-concrete composite open-web beam, form the little equilateral triangle grid of reinforced concrete ribbed beam that three-dimensional is intersected, the little equilateral triangle grid of reinforced concrete ribbed beam that big equilateral triangle grid that the structure of whole superstructure is made up of steel-concrete composite open-web beam and the three-dimensional intersection that is connected are formed and the constant triangle double-grid structure of structure height that forms in big equilateral triangle grid; The structure of steel-concrete composite open-web beam is cast for holistic steel concrete by last girt strip, following girt strip and connecting elements and connects to form, when making steel-concrete composite open-web beam, between last girt strip, following girt strip and connecting elements, be shaped as octagonal empty stomach by equidistant setting, and the cast template of the troughing plate of the high-strength bolt of lengthening or pin as the following girt strip of steel-concrete composite open-web beam arranged on will be in advance, make down that its concrete and troughing plate connect as one behind the girt strip moulding by casting.

2. the preparation method of regular hexagon steel-concrete combined hollow double lattice floor according to claim 1, it is characterized in that: when little equilateral triangle grid of reinforced concrete ribbed beam that rib connection making three-dimensional is intersected on big equilateral triangle grid and floor plate, adopt the template of ardealite formwork as close girt strip of cast and concrete building panel, and pour into a mould close girt strip and concrete building panel by the mode of cast-in-site steel concrete, the close girt strip of ardealite formwork and moulding by casting and concrete building panel are connected as one.

3. regular hexagon steel concrete combined hollow double lattice floor, it is characterized in that: the flat shape of superstructure is a regular hexagon, and orthohexagonal six limits of superstructure are made up of the formed framework of hexagon post net, and the orthohexagonal catercorner length L that is made up of hexagon post net is 30 meters≤L≤48 meter; Be connected with steel-concrete composite open-web beam in hexagon post net, steel-concrete composite open-web beam three-dimensional intersection is formed big equilateral triangle grid, and the structure height H of every steel-concrete composite open-web beam is all 1/20th～24 of regular hexagon catercorner length L mutually; In each big equilateral triangle grid, be provided with the reinforced concrete ribbed beam that is connected with girt strip on steel-concrete composite open-web beam, and the little equilateral triangle grid of reinforced concrete ribbed beam is formed in the interconnection of close girt strip three-dimensional, is being coated with the concrete building panel on steel-concrete composite open-web beam and the close girt strip and on big equilateral triangle grid of being formed and the little triangular mesh; The structure of steel-concrete composite open-web beam is cast for holistic steel concrete by last girt strip, following girt strip and connecting elements and connects to form, when making steel-concrete composite open-web beam, between last girt strip, following girt strip and connecting elements, be shaped as octagonal empty stomach by equidistant setting, and the cast template of the troughing plate of the high-strength bolt of lengthening or pin as the following girt strip of steel-concrete composite open-web beam arranged on will be in advance, make down that its concrete and troughing plate connect as one behind the girt strip moulding by casting.

4. regular hexagon steel-concrete combined hollow double lattice floor according to claim 3, it is characterized in that: big equilateral triangle grid size is determined according to regular hexagon diagonal span, during diagonal span L=36m, each length of side=36/4=9m of big equilateral triangle grid then has 24 big equilateral triangle grids in regular hexagon; During L=48m, each length of side=48/6=8m of big equilateral triangle grid then is provided with the big equilateral triangle grid that 54 length of sides are 8m in regular hexagon.

5. regular hexagon steel concrete combined hollow double lattice floor according to claim 3 is characterized in that: the length of side of little equilateral triangle grid be big equilateral triangle grid the length of side 1/5.

6. regular hexagon steel-concrete combined hollow double lattice floor according to claim 3 is characterized in that: the bottom surface with the concrete building panel on the surface of close girt strip all is coated with the ardealite formwork that uses as cast template.

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