CN102635163A - Assembled monolithic multilayer long-span bidirectional multi-span building with space steel grid box-type structures - Google Patents

Abstract

The invention relates to an assembled integral multi-storey large-span two-way multi-span space steel grid box structure building. The steel structure frame on the ground of each floor is composed of a central cross-shaped single-layer steel grid wall frame, a single-layer steel grid-style external wall frame around it, and an upper steel hollow sandwich plate floor frame to form a single space steel grid box structure. The steel grid wall frames are all connected by high-strength bolts at the construction site from prefabricated small assembly units in the factory; each layer of a single space steel grid box structure is stacked up layer by layer to form a stacked single chrysanthemum box Four multi-layer superimposed single chrysanthemum box structures are connected to each other at the floor to form an assembled multi-layer, large-span, two-way, multi-span space steel grid box-type chrysanthemum bundle. The building of the invention has no welding operation at the construction site, eliminating fire hazards, the cost of the steel structure is 15% to 20% lower than that of the traditional steel frame structure, the construction progress is shortened by at least 1/3, and the lateral stiffness is more than doubled.

Description

Assembled integral multi-storey large-span two-way multi-span space steel grid box structure building

the

technical field

The present invention relates to a large-scale public building structure system, specifically an assembled integral multi-layer large-span two-way multi-span space steel grid box structure building.

Background technique

For a long time, public buildings such as sports training halls, exhibition halls, and large-scale entertainment venues have mostly short-side spans between 30m and 42m, and most of them are single-storey buildings with light steel roofs, which are extremely effective in saving land. unfavorable. However, when large public buildings reach l = 32m ~ 42m, the use of conventional prestressed concrete frame structures, such as the garage of the capital T2 airport, will lead to the phenomenon of "fat beams and fat columns", and there is also the construction progress of concrete pouring on site Slow construction and difficult to improve the level of construction civilization will eventually lead to an increase in construction costs, failing to meet the requirements of "energy saving, emission reduction and low-carbon economy".

Chinese patent ZL200610200188.X discloses a U-shaped reinforced concrete composite hollow sandwich slab floor structure. Its hollow and orthogonal grid shape not only solves the problem of erecting horizontal pipelines such as air conditioners in the hall, but also solves the problem of indoor decoration of large halls. The shape of the suspended ceiling, but its construction is still inseparable from the cast-in-place concrete process, and the structure's self-weight is still too large.

Therefore, in order to make large-scale public buildings multi-storey, multi-span and large-span, it is difficult to achieve good technical and economic indicators by using the current concrete and steel frame structures, and it is also difficult to achieve the use of large-span and large space required by such public buildings. Functional requirements.

Contents of the invention

The present invention aims to solve the disadvantages of large amount of concrete and steel and high cost caused by fat beams and columns in the construction of public buildings with conventional frame structures, and provides a construction site without welding operations, fast construction progress, and civilized construction An assembled monolithic multi-storey, large-span, two-way and multi-span space steel grid box structure building with high height and greatly reduced steel consumption.

The technical scheme that the present invention solves its technical problem adopts is:

An assembled monolithic multi-storey large-span two-way multi-span space steel grid box structure building, the ground steel structure frame of each floor of the building is composed of a central cross-shaped steel grid wall frame and a single-layer steel grid structure around it The outer wall frame is in the shape of a square, and the central cross-shaped steel grid wall frame and the surrounding single-layer steel mesh outer wall frame are connected by high-strength bolts to form four large-area halls that are both divided and integrated. A hall is connected with a steel hollow sandwich panel floor structure by high-strength bolts to form a single space steel grid box structure; the central cross-shaped steel grid wall frame and the single-layer steel grid-style outer wall frame and all The steel hollow sandwich slab floor frame is formed by connecting small steel structure assembly units through high-strength bolts at the construction site. The small steel structure assembly units are prefabricated by the factory and then transported to the construction site; The grid box structure is superimposed layer by layer to form a superimposed single-body box structure. The four multi-layer superimposed single-body box structures are connected to each other at the floor to form an assembled integral multi-layer Large-span two-way multi-span space steel grid box-type chrysanthemum bundle.

Furthermore, the small-scale steel structure assembly unit that constitutes the central cross-shaped steel grid wall frame and the single-layer steel grid-style external wall frame consists of a vertical H-shaped steel in the middle and two welded on the vertical The horizontal H-shaped steel on the H-shaped steel is composed of high-strength bolt connection holes at both ends of the vertical H-shaped steel and the horizontal H-shaped steel.

The small-scale steel structure assembly unit constituting the steel hollow sandwich slab floor structure is a double cross structure. The upper cross-shaped steel member and the lower cross-shaped steel member of the double-cross assembled unit are welded by intermediate connectors. The upper cross-shaped steel member and The two ends of the lower cross-shaped steel member are provided with high-strength bolt connection holes.

The central cross-shaped steel grid wall frame and the single-layer steel grid-style external wall frame form a wall through the DQ Daquan light-weight slats inlaid on both sides.

Compared with the prior art, the outstanding effect of the present invention is: a box-type space steel grid structure is adopted, and each assembled unit of the upper structure is processed in the factory workshop and welded, and the self-weight of each assembled unit is controlled at W≤ 500kg, and ensure the traffic regulations during transportation, no welding work at the construction site, completely eliminate the fire hazards of large-scale steel structure engineering site construction; Compared with large-scale public buildings with traditional steel frame structures, the cost of steel structures is 15% to 20% lower , the construction progress can be shortened by at least 1/3, the construction civilization level is also greatly improved, and the lateral stiffness is also greatly improved.

Description of drawings

Fig. 1 is a schematic plan view of four large-area halls divided by the central cross-shaped steel grid wall frame according to the embodiment of the present invention, with a single span L=32m～42m;

Figure 2 is a schematic diagram of the steel grid layout in the lower left corner of Figure 1.

Fig. 3 is a schematic diagram of a central cross-shaped steel grid wall frame according to an embodiment of the present invention.

Figure 4 is a schematic diagram of the grid layout of the central cross-shaped steel grid wall frame and the single-layer steel grid-style external wall frame of the embodiment of the present invention, and the ones marked with "o" in the figure are high-strength bolt connection points.

Fig. 5 is a schematic diagram of the steel structure of the small steel structure assembly unit A in Fig. 4 .

Fig. 6 is a schematic diagram of the steel structure of the small steel structure assembly unit B in Fig. 4 .

Figure 7 is a cross-sectional structure diagram of DQ Daquan lightweight slats inlaid on both sides of the steel grid outer wall (the center of the wall is hollow).

Fig. 8 is a schematic diagram of the structure of the double cross assembled unit constituting the steel hollow sandwich slab floor frame. the

Figure 9 is an axonometric view of the steel hollow sandwich slab floor frame connected by high-strength bolts in the double cross assembly unit ("O" in the figure is the connection position of high-strength bolts).

Figure 10 is a schematic diagram of the steel hollow sandwich slab floor structure connected with the surrounding single-layer steel grid-style external wall frames to form a single space steel grid box structure for each floor and its equivalent to a plate-type box structure mechanical model.

Figure 11 shows the single space steel grid box structure shown in Figure 10 stacked up layer by layer (4 floors) and four four-layer stacked box structures are connected to each other at the floor to form a large lateral rigidity Schematic diagram of the mechanical model of the multilayer combined box-type chrysanthemum beam structure.

Fig. 12 is an isometric view of the connection between the small steel structure assembly unit B shown in Fig. 6 and the double cross assembly unit shown in Fig. 8 .

Figure 13 is an axonometric view of the grid box structure formed after the steel structure frame is installed.

In the figure: 1-Central cross-shaped steel grid wall frame; 2-Single-layer steel grid style external wall frame; 3-Steel hollow sandwich panel floor frame; 4-Small steel structure assembly unit B; 5-Small steel structure assembly Unit A; 6-vertical H-shaped steel; 7-horizontal H-shaped steel; 8-high-strength bolt connection hole; 9-DQ Daquan lightweight slat; 10-cross-shaped steel member; 13-Double cross assembly unit.

Detailed ways

The present invention is further set forth below in conjunction with embodiment, and purpose is only to understand content of the present invention better. Therefore, the examples given do not limit the protection scope of the present invention.

Referring to Fig. 1, Fig. 2 and Fig. 3, this embodiment presents an assembled integral four-story, orthogonal two-way double-span span of 36m×36m, and each floor is divided into four 36m×36m= ^1296m2 halls Space steel grid box structure building, four halls on each floor are separated by a central cross-shaped steel grid wall frame 1, and the central cross-shaped steel grid wall frame 1 and the surrounding single-layer steel grid-style external wall frame 2 are composed of Connected by high-strength bolts, each floor consists of four halls surrounded by a central cross-shaped steel grid wall frame 1 and a single-layer steel mesh outer wall frame 2. The upper part is connected with a steel hollow sandwich panel floor frame 3, thus forming four halls. A space steel grid box structure, each layer of a single space steel grid box structure is superimposed layer by layer to form a superimposed single box structure, four multi-layer superimposed single box structures The floors are connected to each other to form an assembled monolithic multi-layer large-span two-way multi-span space steel grid box-type chrysanthemum bundle (Figure 1). The four large-area halls on each floor thus built are both divided and integrated, making it possible to diversify the functions of large public buildings.

Referring to Fig. 4, Fig. 5, and Fig. 6, the central cross-shaped steel grid wall frame 1 and the single-layer steel mesh external wall frame 2 are composed of small steel structure assembly unit (A) 5 and small steel structure assembly unit (B) 4 It is connected by high-strength bolts. The small steel structure assembly unit (A) 5 and the small steel structure assembly unit (B) 4 are composed of a vertical H-shaped steel 6 in the middle and two horizontal H-shaped steels 7 welded on the vertical H-shaped steel 6, so Both ends of the vertical H-shaped steel 6 and the horizontal H-shaped steel 7 are provided with high-strength bolt connection holes 8 .

Referring to Fig. 7, the central cross-shaped steel grid wall frame 1 and the single-layer steel grid style external wall frame 2 form the body of wall through the DQ Daquan lightweight slats 9 inlaid on both sides.

Referring to Fig. 8, Fig. 9 and Fig. 12, the steel hollow sandwich slab floor frame 3 is formed by connecting double cross assembly units 13 through high-strength bolts. The double cross assembly unit 13 is welded by the upper and lower cross-shaped steel members 10 through the intermediate connecting piece 11 and the stiffening plate 12 .

The small steel structure assembly units shown in Fig. 5, Fig. 6 and Fig. 8 are all prefabricated by the factory and then transported to the construction site.

The specific construction of the building described in the present invention includes three parts. The first part is to level the site on site, and carry out the construction of the underground foundation and the cast-in-situ concrete frame; the second part is to process and manufacture small-scale steel structure assembly units in the factory workshop and transport them to the construction site; The third part is the space steel grid box structure construction on the ground. The first and second parts of the homework can be completed almost simultaneously.

The third part of the above-ground construction work is mainly to connect the vertical and horizontal space steel grids with high-strength bolts to form an overall grid-like box structure and the "DQ Daquan light-weight slatted wall" embedded in the inner and outer walls. "And door and window work. Specific steps are as follows:

①Transport the factory-made small steel structure assembly unit (A) 5, small steel structure assembly unit (B) 4 and double cross-shaped assembly unit 13 to the construction site.

② Connect the central cross-shaped steel grid wall frame 1 and the single-layer steel grid external wall frame 2 with high-strength bolts from bottom to top.

③ After the wall frame of the first floor is installed, use strong connections such as high-strength bolts to install and assemble the integral steel hollow sandwich panel floor frame 3 (see Figure 12), and place pins on the upper chord top of the steel hollow sandwich panel floor frame 3 to reproduce the pouring. The grid is 2m×2m (or 1.8m×1.8m) reinforced concrete 80 thick two-way multi-span continuous thin slab. At the same time, the processed DQ Daquan lightweight slats 9 are installed on the inner and outer steel grid walls (as shown in Figure 7), and the construction work of the second layer is the same as that of the first layer, until the designed multi-layer After the building installation is completed, the construction work of water, electricity and fire protection will be carried out.

The mechanical model of the present invention is a horizontal and vertical steel grid plate, and each layer forms a grid-shaped box structure, and its mechanical model is equivalent to a "box structure" composed of horizontal and vertical plates (as shown in Figure 10 As shown), each layer of the "box structure" in Figure 10 is stacked up layer by layer to form a superimposed single chrysanthemum box structure, which bears the horizontal force P=2×P/2; four The floors of the two single-body box-type structures are connected to each other, forming a multi-layer combined box-type structure with great lateral rigidity (as shown in Figure 11). After the steel structure frame is installed, the grid box structure shown in Figure 13 is formed.

Claims (4)

1. an assembled integral multilayer large-span bidirectional multispan spatial steel grid box structure is built; It is characterized in that; Said each layer of building ground steel work is configured to by central cross individual layer steel grid wall frame and individual layer steel mesh form exterior wall all around thereof; Individual layer steel mesh form exterior wall frame around said central cross steel grid wall frame and its is connected to form by high-strength bolt, and it not only divides but also close, four large tracts of land halls of one each other, said each hall; Superstructure is connected with steel open-spandrel sandwich board superstructure through high-strength bolt on it, forms single spatial steel grid box structure; Said central cross steel grid wall frame and said individual layer steel mesh form exterior wall frame and said steel open-spandrel sandwich board superstructure frame; Be formed by connecting at the construction field (site) through high-strength bolt by small-sized steel structure assembling unit, said small-sized steel structure assembling unit is made in advance by factory and is transported to the job site again; Said every layer of single spatial steel grid box structure layer upon layer is upwards superimposed; Form the single Tong body of superposed type box structure; Said four the single Tong body of multilayer build-up formula box structures are connected with each other at the superstructure place, form assembled integral multilayer large-span bidirectional multispan spatial steel grid boxlike Tong body bundle.

2. assembled integral multilayer large-span bidirectional multispan spatial steel grid box structure building as claimed in claim 1; It is characterized in that; Constitute the small-sized steel structure assembling unit of said central cross steel grid wall frame and said individual layer steel mesh form exterior wall frame; The horizontal H shaped steel that is connected on this vertical H shaped steel by vertical H shaped steel and two root beads in the middle of being positioned at constitutes, and said vertical H shaped steel is provided with the high-strength bolt connecting hole with the horizontal both ends of H shaped steel.

3. assembled integral multilayer large-span bidirectional multispan spatial steel grid box structure building as claimed in claim 1; It is characterized in that; The small-sized steel structure assembling unit that constitutes said steel open-spandrel sandwich board superstructure frame is the diesis structure; Upper strata cross-shaped steel member and lower floor's cross-shaped steel member of this diesis assembly unit unit are welded by intermediate connector, and this upper strata cross-shaped steel member and lower floor cross-shaped steel member both ends are provided with the high-strength bolt connecting hole.

4. assembled integral multilayer large-span bidirectional multispan spatial steel grid box structure building as claimed in claim 1; It is characterized in that; The DQ that said central cross steel grid wall frame and said individual layer steel mesh form exterior wall frame are inlayed through its two sides reaches power lightweight lath and constitutes body of wall, reaches the effect of insulation steel structure fireproofing.

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