CN103195164A - Assembly prestress center support system for steel structure - Google Patents

Abstract

An assembled steel structure prestressed central support system, which belongs to the technical field of structural engineering, includes an assembled truss plate, an assembled column and a prestressed central support member, and the assembled truss plate includes a lattice structure equipped with angle steel webs Truss beams and floor slabs; the prefabricated truss panels are prefabricated in the factory, and the assembled truss panels are spliced with the beam-column nodes of the fabricated columns through the beam end sealing plates at the construction site. The bolts are spliced on site to form a multi-layer truss slab steel frame structure; on the basis of the truss slab steel frame structure, the prestressed central support member is used as a lateral force-resisting member and is connected with the truss beam in the fabricated truss slab and the column of the fabricated column connected at the bottom or top; the fabricated truss panels, fabricated columns and prestressed central support members are all prefabricated in the factory and assembled by bolts on the construction site.

Description

An assembled steel structure prestressed central support system

technical field

The invention relates to an assembled steel structure prestressed central support system, which belongs to the technical field of structural engineering.

Background technique

my country's annual urban and rural housing area is 2 billion square meters, of which more than 80% are high-energy buildings, and the energy consumption per unit building area in my country is more than twice that of developed countries. According to the statistics of the China Iron and Steel Association, in 2011, my country's steel output exceeded 700 million tons, ranking first in the world's steel output for 16 consecutive years. Our country is less than 4%. As the country with the largest construction scale and steel output in the world, China lags behind seriously in the development of steel structures for houses (including residences).

At present, the systematic research on high-rise steel structure residences at home and abroad is in its infancy, and the innovation of industrially assembled high-rise steel structure systems is imperative. A lot of welding is used in the construction of traditional steel structure residential buildings, the construction speed is slow, and the pollution to the environment is serious. The most important thing is that the quality of the welds is not suitable for control, which seriously affects the safety performance of the building.

At present, prestressed cables are only used in tension string structures, and have not been used in high-rise structures. The use of prestressed cables as high-rise lateral force-resistant components has not yet been realized in engineering. In the traditional steel frame structure system, the lateral rigidity of the structure is difficult to meet the requirements, and the deformation is large, which is easy to cause damage to non-structural components. The industrialized multi-story fabricated steel structure frame-prestressed eccentric support system adds The lateral and longitudinal prestressed eccentric cable supports are used to increase the lateral stiffness of the structure and improve the deformation performance of the structure.

In the traditional structural design and analysis, the beam-column joints in the frame structure are generally treated as ideal rigid joints or hinged joints. Rigid joints are generally considered to be the most ideal form of seismic joints because of their large bearing capacity and stiffness, and are widely used in the joint connection design of frame structures in seismic areas. However, earthquake experience shows that the rigid beam-column joints of buildings have different degrees of brittle failure. The steel frame structure with welded rigid joints is prone to brittle failure due to the poor ductility of the joints, and the construction is also difficult; although the hinged joints are simple in structure, their stiffness and energy dissipation performance are poor, which is not good for the seismic resistance of the structure; Rigid joints have the advantages of both, with higher strength and stiffness, better ductility and energy dissipation performance, thus reducing earthquake damage to a large extent.

Contents of the invention

The invention proposes an assembled steel structure prestressed central support system belonging to the technical field of structural engineering. Its purpose is to combine modularization, factoryization, standardization and assembly in the production and construction of the steel structure system, realize factory production, on-site quick assembly, and improve the construction speed on the premise of ensuring the construction quality. The construction period is reduced and the project cost is reduced. The structural system can realize the rapid installation of the main steel structure frame and lateral force-resistant members, and can resist earthquake and wind loads, reflecting the advantages of steel structures. In addition, semi-rigid joints are used for beam-column joint connection in the present invention, and the semi-rigidly connected steel frame has a small initial lateral stiffness, but a large ductility coefficient and good energy dissipation capacity, which can well meet the seismic requirements under the action of rare earthquakes. Design goals.

The prestressed central support system of the prefabricated steel structure, the prestressed central support system of the prefabricated steel structure is a multi-layer structure, and each layer structure includes a fabricated truss plate, a fabricated column and a prestressed central support member;

The prefabricated truss plate includes a lattice truss beam equipped with angle steel webs and a floor slab, and the lattice truss beam is connected with other lattice truss beams or columns through beam end sealing plates to form a steel frame of the truss plate structure, and then place the floor on the truss plate frame structure and connect them to form a prefabricated truss plate; The beam-column nodes are spliced with each other, and the prefabricated columns are spliced on-site with bolts to form a multi-layer truss-slab steel frame structure; on the basis of the truss-slab steel frame structure, the prestressed central support member is the same The truss girder in the fabricated truss plate is connected to the bottom or top of the fabricated column; the fabricated truss plate, fabricated column and prestressed central support member are all prefabricated in the factory and assembled by bolts at the construction site.

The prestressed central support system of the prefabricated steel structure, the prefabricated truss plate includes three specifications, namely A plate, B plate and C plate;

The A plate includes a double-angle steel truss long main beam (13), a double-angle steel truss main beam (14), a single-angle steel truss long main beam (15), a single-angle steel truss secondary beam (16), a connecting plate I (17), The connecting plate II (18) and the floor slab (19) are characterized in that: the double-angle steel truss main girder (14) and the double-angle steel truss long main girder (13) are connected perpendicularly to each other through two-way columns, both of which are connected by beam end sealing plates and two-way The joint sealing plates on the beam-column joints of the column are connected by bolts, and a connecting plate II (18) is respectively welded on the upper and lower ends of the connecting end, and the two ends of the connecting plate II (18) are respectively connected to the double angle steel truss main beam (14) and the upper and lower chords of the double-angle steel truss long girder (13); the other end of the double-angle steel truss girder (14) is connected with a single-angle steel truss long girder (15) horizontal to the double-angle steel truss long girder (13) , the ends of the double-angle steel truss girder (14) are welded to the upper and lower chords of the single-angle steel truss long main beam (15) and the beam end sealing plate respectively, and the double-angle steel The long main girder of the truss (15) is connected by connecting plates I (17) of the upper and lower sections, that is, the upper and lower chords of the main girder of the double-angle steel truss (14) and the long main girder of the single-angle steel truss (15) are connected with two Plate I (17) is connected by welding; the other end of the single-angle steel truss long main beam (15) is connected with the single-angle steel truss secondary beam (16), and the double-angle steel truss long main beam (13) and the single-angle steel truss long main beam (15) Horizontally opposite, the single-angle steel truss secondary beam (16) is horizontally opposite to the double-angle steel truss main beam (14), and the upper and lower chords at the end of the single-angle steel truss secondary beam (16) and the end of the single-angle steel truss long main beam (15) and The beam end sealing plates are welded and connected respectively, and the secondary beam (16) of the single-angle steel truss and the long main beam (15) of the single-angle steel truss are connected through two connecting plates I (17) connected at the upper and lower chords; the single-angle steel truss The other end of the truss secondary beam (16) is connected to the double-angle steel truss long main beam (13) through a three-phase column, and the end of the single-angle steel truss secondary beam (16) is connected to the double-angle steel truss long main beam (13). are connected by two connecting plates II (18) at the upper and lower chords; the long main girder of the double-angle steel truss (13), the main beam of the double-angle steel truss (14), the long main girder of the single-angle steel truss (15), The single-angle steel truss secondary beams (16) form a rectangular frame; two identical rectangular frames are connected to form a spliced bottom frame; the single-angle steel truss secondary beams (16) in the two rectangular frames are aligned and connected by bolts, and The two long main girders of double-angle steel trusses (13) are located on a straight line, and the two long main girders of single-angle steel trusses (15) are located on a straight line; the upper and lower ends of the two long main beams of double-angle steel trusses (13) pass through the beam end The sealing plate is connected with the joint sealing plate of the beam-column node in two opposite directions of the three-way column with bolts, and the two single-angle steel truss secondary beams (16) are connected to the joint sealing plate of the other beam-column node of the three-way column. slab; the truss slab steel frame structure is connected to the two floor slabs (19) through the upper anchors of the truss beam top chord; all components of the A slab are factory prefabrication and assembly;

The B plate includes double-angle steel truss main girders (14), two single-angle steel truss long main girders (15) and (15'), single-angle steel truss secondary beams (16), connecting plate I (17), connecting plate II (18) and the floor (19), the double-angle steel truss main beam (14) and the single-angle steel truss long main beam (15) are perpendicular to each other, and the end of the double-angle steel truss main beam (14) is connected to the single-angle steel truss long main beam (15) The upper and lower chords at the end and the beam end sealing plate are connected by welding respectively, and then connected by the connecting plate I (17) of the upper and lower sections, that is, the double-angle steel truss main beam (14) and the single-angle steel truss long main beam (15) The upper and lower chords of the two connecting plates I (17) are welded and connected; the other end of the double-angle steel truss main beam (14) is connected by another single-angle steel The long main beam of the single-angle steel truss (15') is horizontally opposite to the long main beam of the single-angle steel truss (15), and the upper and lower chords of the double-angle steel truss main beam (14) and the long main beam of the single-angle steel truss (15') are connected with two The connecting plate II (18) is connected by welding; the two ends of the single-angle steel truss secondary beam (16) are respectively connected to the other end of the single-angle steel truss long main beam (15) and the other end of the single-angle steel truss long main beam (15'). At one end, the single-angle steel truss secondary beam (16) is horizontally opposite to the double-angle steel truss main beam (14), and the connection form of the single-angle steel truss secondary beam (16) and the single-angle steel truss long main beam (15) is the same as that of the double-angle steel truss main beam (15). The connection form of the beam (14) and the long main girder of the single-angle steel truss (15) is the same; 16) The upper and lower chords of the long main girder of the single-angle steel truss (15') are connected by welding with two connecting plates II (18); (15) and (15'), single-angle steel truss secondary beams (16) form a rectangular frame; the same two rectangular frames are connected to form a spliced bottom frame; single-angle steel truss secondary beams (16 ) are aligned and connected by bolts, and the single-angle steel truss long main girder (15) of a rectangular frame and the two single-angle steel truss long main girders (15) horizontally opposite to the other long direction frame are respectively located on a straight line; The upper and lower ends of the long main girder (15') of the single-angle steel truss are connected by bolts to the node sealing plate on the beam-column joint of the four-way column through the beam end sealing plate, and the two single-angle steel truss secondary beams (16) are juxtaposed Connected to the closing slabs of the beam-column joints of the four-way columns, the truss slab steel frame structure is connected to the two floor slabs (19) through the truss beam upper chord upper anchors; all components of said B slab are prefabricated and assembled in the factory ;

The C board has the same structure as the B board;

In the prestressed central support system of the prefabricated steel structure, the A plate, the B plate and the C plate are spliced through the arrangement ABCBC...BCBCA. Column connection, using four-way column connection at the four-way column;

The A-plate and B-plate, align A-plate and B-plate horizontally, connect one end of the double-angle steel truss girder 14 of A-plate that is not connected to the beam-column node and the double-angle steel truss main beam (14) of B-plate with a connecting plate One end of I (17) is spliced with bolts through the beam end sealing plate; the end of the single-angle steel truss secondary beam (16) of plate A that is not connected to the prefabricated column and the single-angle steel truss secondary beam (16) of plate B are connected. One end of the connecting plate I (17) splices the beam end sealing plate with bolts; at the bolt hole on the web of the single-angle steel truss long main beam (15) of the A plate and the single-angle steel truss long main beam (15) of the B plate The single beams are spliced at intervals of a fixed distance by bolts, so that two single beams are connected to form a double beam; thereby completing the splicing of the A board and the B board;

The B-plate and C-plate, align the B-plate and the C-plate horizontally, and connect one end of the double-angle steel truss girder (14) of the B-plate with the connecting plate II (18) and the three-way column (12) of the C-plate The exposed joint sealing plate of the beam-column joint is connected by bolts through the beam end sealing plate; the end of the single-angle steel truss secondary beam (16) of the B-plate with the connection plate II (18) is connected with the beam-column joint of the four-way column of the C-plate The exposed joint sealing plates are connected by bolts through the beam end sealing plates; the upper and lower ends of the single-angle steel truss long main beam (15') of the B plate are connected in two opposite directions by the beam end sealing plates and the beam-column joints of the four-way columns. The joint sealing plate is connected by bolts, and the other end of the single-angle steel truss long main beam (15') of the B plate is connected with the joint sealing plate perpendicular to the exposed joint sealing plate on the three-way column of the C plate through the beam end sealing plate respectively. ; The single-angle steel truss long main girder (15') of the B plate and the single-angle steel truss long main girder (15) of the C plate are spliced by bolts at intervals of a fixed distance, so that the two single The beams are connected to become double beams; thereby completing the splicing of the B-plate and the C-plate.

The connection method between A board and C board is the same as that of A board and B board.

The assembled truss plate is connected to the assembled column by bolts at the beam-column node to form a frame structure; the prestressed central support member is composed of a prestressed cable (23) and an ear plate, and the ear plate is welded or welded at the factory The bolts are connected to the bottom and top of the column of the frame structure or the upper and lower chords of the truss beam (20), and the prestressed cables (23) and the ear plates at the upper and lower ends of each frame structure are connected by bolts at the construction site to form a frame-center Supporting structure; the prestressed cable (23) applies prestress by tightening the connecting sleeve (21); the prestressed cable is a high-strength steel rod, or uses a high-strength steel strand, a high-strength steel member, or uses a damper High-strength steel rods, high-strength steel strands or high-strength steel members.

In the prestressed central support system of the prefabricated steel structure, the beams involved are mainly truss beams composed of upper and lower chords and webs spliced together, wherein the upper and lower chords and webs are made of angle steel, and the webs and chords are 30 It is divided into single beam and double beam, and the single beam is provided with connecting holes at a fixed distance, so that two single beams can be spliced into double beams with bolts when splicing plates. For double beams, angle steel The connections are bolted or welded, all of which are processed in the factory;

In the prestressed central support system of the prefabricated steel structure, the beams involved are mainly truss beams spliced by upper and lower chords, web members and gusset plates, wherein the upper and lower chords use angle steel, or use channel steel, or use square Steel pipes and webs use angle steel, and the webs and chords form an angle of 30°-60°; and are divided into single beams and double beams, and the single beams are provided with connection holes at regular intervals to facilitate the use of bolts when splicing plates. Two pieces of single girders are spliced to form double girders. For double girders, the web members, upper and lower chords and gusset plates are connected by bolts or welding, which are all processed in the factory.

In the prestressed central support system of the assembled steel structure according to the present invention, the assembled column (12) is composed of a box column (8), a connecting plate (7), a rib plate (10), and a sealing plate (9). There are three types of beam-column joints, namely two-way joints, three-way joints and four-way joints; according to the different beam-column joints, it can be divided into three types of columns, namely two-way columns, three-way columns and four-way columns ; Weld two upper and lower parallel connecting plates (7) to one side of the box-shaped column (8), and then weld two ribs (10) to the box-shaped column (8) between the two connecting plates , and weld the connecting plate (7) and the rib plate (10) with a sealing plate (9), and do the same on the adjacent side of the box-shaped column (8) to form a two-way node column; the two connecting plates (7 ) are welded to one side of the box column (8), and then two ribs (10) are welded to the box column (8) between the two connecting plates, and the connecting plate (7) and the rib ( 10) Weld with a sealing plate (9), and do the same on the other two sides of the box-shaped column (8) to form a three-way node column; weld the two connecting plates (7) to one side of the box-shaped column (8) respectively, Then two ribs (10) are welded to the box column (8) between the two connecting plates, and the connecting plate (7) and the ribs (10) are welded to a sealing plate (9), the box The other three sides of the shaped column (8) do the same to form a four-way node column; wherein the sealing plate (9) has a bolt hole, which is spliced with the upper end sealing plate of the beam with bolts; the three assembled columns are all manufactured in the factory.

In the prestressed central support system of the prefabricated steel structure, the splicing of the prefabricated column (12) is performed by welding the splicing plates (11) on the four inner sides of the box-shaped column (8), and the lower half of the splicing plate (11) is welded to the box-shaped column , the upper part has a threaded bolt hole, which is opposite to the bolt hole on the lower side of another box-shaped column, and the columns are spliced together with bolts.

The floor slab uses profiled steel composite floor slabs, or reinforced concrete floor slabs, or OSB particle boards.

The beneficial effect of the present invention is that, in the prestressed central support system of the prefabricated steel structure, the beams used are all truss beams. Since the belly gap of the beams is large, it is convenient for pipelines to pass through, and the net height of the room is effectively increased.

The prefabricated steel structure prestressed central support system completely uses bolts for on-site assembly, cancels the traditional on-site welding method and concrete pouring method, effectively guarantees the construction quality, and completely avoids environmental pollution caused by concrete pouring and steel welding , Realize the three-no standard of "no water, no fire, no dust" in on-site construction, reducing the occurrence of fire and other hazardous accidents. And the anti-lateral force system can effectively improve the lateral stiffness of the structure, improve the deformation performance of the structure, and make the structure have a greater safety reserve. When the components are dismantled, the present invention can efficiently recycle, reduce construction waste, truly realize the concept of green environmental protection, and is a green and sustainable steel structure system.

Description of drawings

Fig. 1 is the splicing plane layout diagram of the assembled truss panel of the present invention

Fig. 2 is a schematic diagram of the assembled truss plate of the present invention without gusset plate angle steel truss beam

Fig. 3 is a schematic diagram of the assembled truss plate with gusset plate angle steel truss beam of the present invention

Fig. 4 is a schematic diagram of the channel steel truss girder of the assembled truss plate with gusset plate of the present invention

Fig. 5 is a schematic diagram of a square steel pipe truss beam with assembled truss plates of the present invention with gusset plates

Fig. 6 is a schematic diagram of two-way beam-column joints of the assembled truss plate of the present invention

Fig. 7 is a schematic diagram of the three-way beam-column joint of the assembled truss plate of the present invention

Fig. 8 is a schematic diagram of four-way beam-column joints of the assembled truss plate of the present invention

Fig. 9 is a schematic diagram of splicing assembled columns of the present invention

Fig. 10 is an exploded view of unit A of the assembled truss plate of the present invention

Figure 11 is an on-site assembly diagram of the fabricated truss panel A of the present invention

Fig. 12 is an assembled drawing of unit A of the fabricated truss plate of the present invention

Fig. 13 is an exploded view of unit B of the assembled truss plate of the present invention

Fig. 14 is an on-site assembly diagram of the fabricated truss plate B of the present invention

Fig. 15 is an assembled drawing of unit B of the assembled truss plate of the present invention

Fig. 16 is an exploded view of unit C of the assembled truss plate of the present invention

Figure 17 is an on-site assembly diagram of the fabricated truss panel C of the present invention

Fig. 18 is an assembled drawing of unit C of the prefabricated truss plate of the present invention

Fig. 19 is an assembled drawing of the fabricated truss panels A, B and C units of the present invention

Figure 20 is an exploded view of the assembled truss plate joint J1 in the accompanying drawings of the present invention

Figure 21 is an exploded view of the assembled truss plate node J2 in the accompanying drawings of the present invention

Figure 22 is an exploded view of the assembled truss plate node J3 in the accompanying drawings of the present invention

Figure 23 is an exploded view of the assembled truss plate node J4 in the accompanying drawings of the present invention

Figure 24 is an exploded view of the assembled truss plate node J5 in the accompanying drawings of the present invention

Figure 25 is an exploded view of the assembled truss plate node J6 in the accompanying drawings of the present invention

Figure 26 is an exploded view of the assembled truss plate node J7 in the accompanying drawings of the present invention

Figure 27 is an exploded view of the assembled truss plate node J8 in the accompanying drawings of the present invention

Figure 28 is an exploded view of the assembled truss plate assembly node J9 in the accompanying drawings of the present invention

Figure 29 is an exploded view of the assembled truss plate assembly node J10 in the accompanying drawings of the present invention

Figure 30 is an exploded view of the assembled truss plate assembly node J11 in the accompanying drawings of the present invention

Figure 31 is an exploded view of the assembled truss plate assembly node J12 in the accompanying drawings of the present invention

Fig. 32 is a schematic diagram of the assembled steel structure prestressed central cross-shaped support frame system of the present invention

Fig. 33 is a schematic diagram of the prestressed central mono-slant bar support frame system of the assembled steel structure of the present invention

Fig. 34 is a schematic diagram of the herringbone support frame system of the assembled steel structure prestressed center of the present invention

Fig. 35 is a schematic diagram of the V-shaped support frame system of the fabricated steel structure prestressed center of the present invention

Fig. 36 is a schematic diagram of the fabricated steel structure prestressed central two-way single-slope support frame system of the present invention

Fig. 37 is a detailed diagram of the connection nodes between the ear plate I and the prestressed cables of the assembled steel structure prestressed central support system of the present invention

Fig. 38 is a detailed view of the connection nodes between the ear plate II and the prestressed cables of the assembled steel structure prestressed central support system of the present invention

Fig. 39 is a detailed view of the connection nodes between the lug plate and the assembled column of the prestressed central support system of the assembled steel structure of the present invention

Fig. 40 is a schematic diagram of a prestressed central support structure of a single-layer fabricated steel structure of the present invention.

In the figure 1. Upper and lower chord I, 2. Web I, 3. Gusset plate, 4. Web II, 5. Upper and lower chord II, 6. Upper and lower chord III, 7. Gusset plate, 8. Box column , 9. Node sealing plate, 10. Node rib plate, 11. Column splicing plate, 12. Prefabricated column, 13. Long main beam of double-angle steel truss, 14. Main beam of double-angle steel truss, 15. Long main beam of single-angle steel truss , 15'. Long main beam of single-angle steel truss, 16. Secondary beam of single-angle steel truss, 17. Connection plate I (triangular), 18. Connection plate II (trapezoidal), 19. Floor, 20. Truss beam, 21. Connection sleeve , 22. Ear plate I, 23. Prestressed cable, 24. Ear plate II.

Detailed ways

The present invention is described in detail below in conjunction with accompanying drawing:

As shown in Figure 1, the splicing position of the assembled truss plate of the present invention is set in the middle of the main girder, where the shear force and bending moment are relatively small. From the perspective of structural mechanics, the setting of the splicing position is reasonable.

As shown in Figure 2, in the prestressed central support system of the prefabricated steel structure of the present invention, the beams involved are truss beams composed of angle steel splicing, including upper and lower chords I (1), webs I (2) , where the upper and lower chords I (1) and webs I (2) are both made of angle steel, and are divided into single-angle steel beams and double-angle steel beams. The single-angle steel beams are provided with connecting holes at regular intervals, which is convenient for the plate-to-plate connection. When splicing, bolts are used to splice two pieces of single-angle steel beams into double-angle steel beams. For double-angle steel beams, the connection of angle steel is bolted or welded, which are all processed in the factory;

As shown in Figure 3, or use a truss beam composed of angle steel and gusset plate splicing, including upper and lower chord I (1), web II (4) and gusset plate (3), where the upper and lower chord I (1 ) and web II (4) are both made of angle steel, and are divided into single-angle steel beams and double-angle steel beams. The single-angle steel beams are provided with connection holes at a fixed distance, which is convenient for bolting two single-piece beams when splicing plates. Angle steel beams are spliced into double-angle steel beams. For double-angle steel beams, the connection between the angle steel and the gusset plate is connected by bolts or welding, which are all processed in the factory;

As shown in Figure 4, or use a truss beam spliced by angle steel, channel steel and gusset plate, including upper and lower chord II (5), web II (4) and gusset plate (3), where the upper and lower chord II (5) Channel steel is used, and the web II (4) is made of angle steel, which is divided into single-channel steel beam and double-channel steel beam. The single-channel steel beam is provided with connecting holes at a fixed distance, which is convenient for using bolts when splicing plates. Splice two pieces of single-channel steel beams into double-channel steel beams. For double-channel steel beams, the connection of angle steel, channel steel and gusset plate is connected by bolts or welded, all of which are processed in the factory;

As shown in Figure 5, or use a truss beam spliced by angle steel, square steel pipe and gusset plate, including upper and lower chord III (6), web II (4) and gusset plate (3), where the upper and lower chord III (6) Square steel pipes are used, and the web II (4) is made of angle steel, which is divided into single steel pipe beams and double steel pipe beams. The single steel pipe beams are provided with connection holes at regular intervals, so that bolts can be used to connect the plates to each other. Two pieces of unilateral steel pipe girders are spliced to form two-sided steel pipe girders. For two-sided steel pipe girders, the connection between angle steel, square steel pipe and gusset plate is connected by bolts or welded, all of which are processed in the factory;

For the above four beam cross-section forms, the splicing method of splicing single beams into double beams through bolts has good rigidity and stability. Since the belly space of the truss beam is large, it is convenient for pipelines to pass through, effectively increasing the net height of the room. In the prestressed central support system of the prefabricated steel structure of the present invention, as shown in accompanying drawings 6-8, the assembled column consists of a box-shaped column (8), a connecting plate (7), and a rib plate (10). There are three types of beam-column joints, which are two-way joints, three-way joints and four-way joints; according to the difference of beam-column joints, they can be divided into three types of columns, which are two-way uprights, three-way Orientation column and node column; weld two upper and lower parallel connection plates (7) to one side of the box column (8), and then weld two ribs (10) to the box column between the two connection plates (8), weld the connecting plate (7) and the rib plate (10) with a sealing plate (9), and do the same on the adjacent side of the box-shaped column (8) to form a two-way node column; The connection plate (7) is welded to one side of the box column (8), and then two ribs (10) are welded to the box column (8) between the two connection plates, and the connection plate (7) The rib plate (10) is welded with a sealing plate (9), and the other two sides of the box column (8) are similarly formed to form a three-way node column; the two connecting plates (7) are respectively connected to the box column (8) One side is welded, and then two ribs (10) are welded to the box column (8) between the two connecting plates, and the connecting plate (7) and the ribs (10) are connected with a sealing plate (9) The other three sides of the box column (8) are similarly welded to form a four-way node column; the sealing plate (9) has bolt holes and is spliced with the upper end sealing plate of the beam with bolts; the three assembled columns are all in Factory made.

In the prestressed central support system of the prefabricated steel structure, as shown in Figure 9, the splicing of the prefabricated column (12) consists of splicing plates (11) respectively welded on the four sides of the inner side of the box-shaped column (8), splicing plates (11 ) The lower half is welded with the box-shaped column, and the upper half has a threaded bolt hole, which is opposite to the bolt hole on the lower side of another box-shaped column, and the column is spliced with bolts.

In the prestressed central support system of the prefabricated steel structure, as shown in Figure 10-12, the A plate includes the long main girder of the double-angle steel truss (13), the main girder of the double-angle steel truss (14), the long main girder of the single-angle steel truss Beam (15), single-angle steel truss secondary beam (16), connection plate I (17), connection plate II (18) and floor slab (19), characterized in that: double-angle steel truss main beam (14) and double-angle steel truss length The main girders (13) are perpendicular to each other, and they are all connected by bolts to the joint sealing plates on the beam-column joints of the two-way column through the beam end sealing plates, and a connecting plate II (18) is welded to the upper and lower end faces of the joints respectively, and the connecting plates The two ends of II (18) are respectively connected to the upper and lower chords of the double-angle steel truss main beam (14) and the double-angle steel truss long main beam (13); the other end of the double-angle steel truss main beam (14) is connected with a Long truss girder (13) horizontal single-angle steel truss long main girder (15), double-angle steel truss main girder (14) end and single-angle steel truss long main girder (15) end upper and lower chords and beam ends The sealing plates are welded and connected respectively, and the double-angle steel truss main girder (14) is connected with the single-angle steel truss long main girder (15) through the connecting plate I (17) of the upper and lower sections, and the double-angle steel truss main girder (14) is connected with the The upper and lower chords of the long main girder of the single-angle steel truss (15) are connected by welding with two connecting plates I (17); the secondary beam of the single-angle steel truss (16) is connected between the long The other end of the long main beam of the angle steel truss (15) is horizontally opposite to the main beam of the double angle steel truss (14), and the upper and lower ends of one end of the secondary beam of the single angle steel truss (16) and the other end of the long main beam of the single angle steel truss (15) The chords and beam end sealing plates are welded and connected respectively, and the single-angle steel truss secondary beam (16) is connected to the single-angle steel truss long main beam (15) through two connecting plates I (17) connected at the upper and lower chords The other end of the single-angle steel truss secondary beam (16) is connected with the double-angle steel truss long main beam (13) through two connection plates II (18) connected at the upper and lower chords; the double-angle steel truss is long The main beam (13), the double-angle steel truss main beam (14), the single-angle steel truss long main beam (15), and the single-angle steel truss secondary beam (16) form a rectangular frame; the two rectangular frames are connected to form a splicing The bottom frame of the bottom frame; the single-angle steel truss secondary beams (16) in the two rectangular frames are aligned and connected by bolts, and the two double-angle steel truss long main beams (13) are located in a straight line, and the single-angle steel (15) Located on a straight line; the upper and lower ends of the two double-angle steel truss long main girders (13) are connected by bolts to the joint sealing plates in two opposite directions of the beam-column joints of the three-way column through the beam end sealing plate, so The above-mentioned two single-angle steel truss secondary beams (16) are connected to the joint sealing plate perpendicular to the two directions on the beam-column node of the three-way column; Two floor plates (19) are connected; all components of said A plate are prefabricated and assembled in the factory;

In the prestressed central support system of the prefabricated steel structure, as shown in accompanying drawings 16-18, the B-plate includes double-angle steel truss main girders (14), single-angle steel truss long main girders (15) and (15'), The single-angle steel truss secondary beam (16), the connection plate I (17), the connection plate II (18) and the floor plate (19), the double-angle steel truss main beam (14) and the single-angle steel truss long main beam (15) are perpendicular to each other, double The end of the angle steel truss main girder (14) is welded to the upper and lower chords and beam end sealing plates at the end of the single angle steel truss long main girder (15), and then connected through the connecting plates I (17) of the upper and lower sections. And the upper and lower chords of the double-angle steel truss girder (14) and the single-angle steel truss long main girder (15) are welded and connected with two connecting plates I (17); The connecting plate II (18) of the first section is connected with another single-angle steel truss long main beam (15') horizontal to the single-angle steel truss long main beam (15), and the double-angle steel truss main beam (14) is connected to the single The upper and lower chords of the long main girder of the angle steel truss (15') are connected by welding with two connecting plates II (18); 15) The other end and the other end of the long main girder of the single-angle steel truss (15'), horizontally opposite to the main beam of the double-angle steel truss (14), the secondary beam of the single-angle steel truss (16) and the two long main beams of the single-angle steel truss (15') ) and (15') are the same as the connection form of the double-angle steel truss girder (14) and two single-angle steel truss long girders (15) and (15'); the double-angle steel truss main girder Beam (14), two single-angle steel truss long main beams (15) and (15'), single-angle steel truss secondary beams (16) form a rectangular frame; the same two rectangular frames are connected to form a spliced bottom frame; The single-angle steel truss secondary beams (16) in the two rectangular frames are aligned and connected by bolts, and the single-angle steel truss long main beam (15) of one rectangular frame and the two single-angle steel truss long The main beams (15) are respectively located on a straight line; the steel frame structure of the truss plate is connected to the two floor plates (19) through the upper anchors of the upper chord of the truss beam; all components of the B plate are prefabricated and assembled in the factory;

In the prestressed central support system of the prefabricated steel structure, as shown in the attached drawings 16-18, the C plate includes the double-angle steel truss main beam (14), the single-angle steel truss long main beam (15) and (15'), The single-angle steel truss secondary beam (16), the connection plate I (17), the connection plate II (18) and the floor plate (19), the double-angle steel truss main beam (14) and the single-angle steel truss long main beam (15') are perpendicular to each other, And both are connected by bolts to the two adjacent node sealing plates on the beam-column node of the three-way column through the beam end sealing plate, and a connecting plate II (18) is welded at the upper and lower end faces of the joint, and the connecting plate II ( 18) are respectively connected to the upper and lower chords of the double-angle steel truss main beam (14) and the single-angle steel truss long main beam (15'); the other end of the double-angle steel truss main beam (14) is connected with the single The angle steel truss long main beam (15') is horizontal to another single angle steel truss long main beam (15), and the end of the double angle steel truss main beam (14) is above and below the end of this single angle steel truss long main beam (15) The chords and beam end sealing plates are connected by welding respectively, and the double-angle steel truss main girder (14) is connected with the single-angle steel truss long main beam (15) through connecting plates I (17) of the upper and lower The upper and lower chords of the beam (14) and the long main beam (15) of the single-angle steel truss are connected by welding with two connecting plates I (17); the two ends of the single-angle steel truss secondary beam (16) are connected on the The other end of the long main beam (15') and the other end of the single-angle steel truss long main beam (15), the single-angle steel truss secondary beam (16) is horizontally opposite to the double-angle steel truss main beam (14), and the single-angle steel truss secondary beam (16 ) at one end and the upper and lower chords at the other end of the single-angle steel truss long main beam (15') and the beam end sealing plate are welded respectively, and the single-angle steel truss secondary beam (16) is connected with the single-angle steel truss long main beam (15' ) between the two connecting plates I (17) connected at the upper and lower chords; the other end of the single-angle steel truss secondary beam (16) and the single-angle steel The two connection plates II (18) at the chord are connected; the double-angle steel truss main beam (14), the single-angle steel truss long main beam (15), the single-angle steel truss long main beam (15') and the single-angle steel truss The secondary beams (16) form a rectangular frame; the two rectangular frames are connected to form a spliced bottom frame; the single-angle steel truss secondary beams (16) in the two rectangular frames are aligned and connected by bolts, and a rectangular frame A single-angle steel truss long main girder (15) of the frame and a single-angle steel truss long main girder (15) of the other longitudinal direction frame are respectively located on a straight line; two single-angle steel truss long main girders (15') The upper and lower ends are connected by bolts to the joint sealing plates of the beam-column joints of the four-way column in two opposite directions through the beam end sealing plate, and the two single-angle steel truss secondary beams (16) are connected in parallel to the beam of the four-way column Closing plate for column joints; truss slab steel frame structure connected to two floor slabs (19) through truss girder upper chord upper anchors; all components of said C slab are prefabricated in factory and assembly;

In the prestressed central support system of the prefabricated steel structure of the present invention, as shown in Figure 19, the A plate and the B plate are horizontally aligned with the A plate and the B plate, and the double angle steel truss main girder 14 of the A plate is One end of the beam-column node not connected to the double-angle steel truss main beam (14) of the B plate is spliced with bolts through the beam end sealing plate with the end of the connecting plate I (17); the single-angle steel truss secondary beam of the A plate (16 ) and one end of the single-angle steel truss secondary beam (16) of plate B without connecting the prefabricated column and one end of the connecting plate I (17) to splice the beam end sealing plate through bolts; The beam (15) and the single-angle steel truss long main beam (15) of the B plate are spliced by bolts at the bolt holes on the upper web of the single beam at a fixed distance, so that the two single beams are connected to form a double beam; thus completing the A plate Splicing with board B;

In the prestressed central support system of the prefabricated steel structure of the present invention, as shown in Figure 19, the B plate and the C plate are horizontally aligned with the B plate and the C plate, and the double angle steel truss main girder of the B plate ( 14) One end of the connecting plate II (18) and the exposed node sealing plate of the three-way column (12) of the C plate are connected by bolts through the beam end sealing plate; the single angle steel truss secondary beam of the B plate (16 ) with one end of the connection plate II (18) and the exposed node sealing plate of the beam-column joint of the four-way column of the C plate are connected by bolts through the beam end sealing plate; the single angle steel truss long main beam (15') Both the upper and lower ends of the beam are connected by bolts to the joint sealing plates of the beam-column joints of the four-way column in two opposite directions through the beam end sealing plate. The end seal plate and the node seal plate perpendicular to the exposed node seal plate on the three-way column of C plate are connected by bolts; the single-angle steel truss long main beam (15’) on B plate and the single-angle steel truss long main beam (15’) on C plate ) The bolt holes in the web plate are used to splice the single beams at a fixed distance through bolts, so that two single beams are connected to form a double beam; thus completing the splicing of the B plate and the C plate.

The connection method between A board and C board is the same as that of A board and B board.

To sum up, the overall floor slab formed by splicing A, B, and C has four different node forms at the splicing place: node 9, node 10, node 11, and node 12, of which node 9 and node 10 can be located at the splicing node. Overlay plates to increase joint stiffness.

In the prestressed central support system of the above prefabricated steel structure, as shown in the accompanying drawings 20-27, the exploded detailed drawings of the assembled truss plate nodes 1-8 are respectively made; as shown in the attached drawings 28-31, the Exploded detailed diagram of fabricated truss slab joints 9-12;

In the prestressed central support system of the prefabricated steel structure of the present invention, as shown in Figure 35, the cross-shaped lateral force-resistant member consists of prestressed cables (23), connecting sleeves (21) and ear plates I (22 ) composition; the ear plate I (22) is connected to the bottom and top of the column by welding or bolts, the prestressed cable (23) and the ear plate I (22) are connected by bolts; the prestressed cable (23) is connected by connecting the sleeve (21) Tighten and apply prestress; the prestressed cables are high-strength steel rods, or use high-strength steel strands, high-strength steel members, or use high-strength steel rods with dampers, high-strength steel strands or high-strength steel members .

In the prestressed central support system of the prefabricated steel structure according to the present invention, as shown in the accompanying drawing 33, its single-slope anti-lateral force member consists of a prestressed cable (23), a connecting sleeve (21) and an ear plate I ( 22) composition; the ear plate I (22) is connected to the bottom and top of the column by welding or bolts, the prestressed cable (23) and the ear plate I (22) are connected by bolts; the prestressed cable (23) is connected by connecting the sleeve (21 ) to tighten and apply prestress; the prestressed cables are high-strength steel rods, or use high-strength steel strands, high-strength steel members, or use high-strength steel rods with dampers, high-strength steel strands or high-strength steel member.

In the prestressed central support system of the prefabricated steel structure of the present invention, as shown in Figure 32, its herringbone anti-lateral force member consists of prestressed cables (23), connecting sleeves (21), ear plates I (22) and lug plate II (24); lug plate I (22) is connected to the bottom of the column by welding or bolts, prestressed cables (23) and lug plate I (22) are connected by bolts; lug plate II (24) is welded Or bolted on the truss beam (20), the prestressed cable (23) and the ear plate II (24) are connected by bolts; the prestressed cable (23) applies prestress by tightening the connecting sleeve (21); the prestress The cable is a high-strength steel rod, or a high-strength steel strand, a high-strength steel member, or a high-strength steel rod with a damper, a high-strength steel strand or a high-strength steel member.

In the prestressed central support system of the prefabricated steel structure according to the present invention, as shown in Figure 34, its V-shaped lateral force resistance member consists of prestressed cables (23), connecting sleeves (21), ear plates I (22) and lug plate II (24); lug plate I (22) is connected to the bottom and top of the column by welding or bolts, prestressed cables (23) and lug plate I (22) are connected by bolts; lug plate II (24) is connected by Welded or bolted to the truss beam (20), the prestressed cable (23) and the ear plate II (24) are connected by bolts; the prestressed cable (23) applies prestress by tightening the connecting sleeve (21); the prestressed The stress cable is a high-strength steel rod, or uses a high-strength steel strand, a high-strength steel member, or uses a high-strength steel rod with a damper, a high-strength steel strand or a high-strength steel member.

In the prestressed central support system of the prefabricated steel structure according to the present invention, as shown in Figure 36, the two-way single-slope anti-lateral force member consists of a prestressed cable (23), a connecting sleeve (21) and an ear plate I (22); the ear plate I (22) is connected to the bottom and top of the column by welding or bolts, the prestressed cable (23) and the ear plate I (22) are connected by bolts; the prestressed cable (23) is connected by connecting the sleeve ( 21) Tighten and apply prestress; the prestressed cables are high-strength steel rods, or use high-strength steel strands, high-strength steel members, or use high-strength steel rods with dampers, high-strength steel strands or high-strength Steel components.

In the prestressed central support system of the prefabricated steel structure mentioned above, as shown in the accompanying drawings 37-39, the exploded detailed diagrams of the connection nodes between the lug plate and the cable body are respectively made.

Claims (7)

1. An assembled steel structure prestressed central support system is characterized in that the assembled steel prestressed central support system is a multi-layer structure, and each layer of structure includes an assembled truss plate, an assembled column and a prestressed central support member; The prefabricated truss plate includes a lattice truss beam equipped with angle steel webs and a floor slab, and the lattice truss beam is connected with other lattice truss beams or columns through beam end sealing plates to form a steel frame of the truss plate structure, and then place the floor on the truss plate frame structure and connect them to form a prefabricated truss plate; The beam-column nodes are spliced with each other, and the prefabricated columns are spliced on-site with bolts to form a multi-layer truss-slab steel frame structure; on the basis of the truss-slab steel frame structure, the prestressed central support member is the same The truss girder in the fabricated truss plate is connected to the bottom or top of the fabricated column; the fabricated truss plate, fabricated column and prestressed central support member are all prefabricated in the factory and assembled by bolts at the construction site. 2. According to claim 1, the prestressed central support system of a prefabricated steel structure is characterized in that the prefabricated truss plate includes three specifications, namely A plate, B plate and C plate; The A plate includes a double-angle steel truss long main beam (13), a double-angle steel truss main beam (14), a single-angle steel truss long main beam (15), a single-angle steel truss secondary beam (16), a connecting plate I (17), The connecting plate II (18) and the floor slab (19) are characterized in that: the double-angle steel truss main girder (14) and the double-angle steel truss long main girder (13) are connected perpendicularly to each other through two-way columns, both of which are connected by beam end sealing plates and two-way The joint sealing plates on the beam-column joints of the column are connected by bolts, and a connecting plate II (18) is respectively welded on the upper and lower ends of the connecting end, and the two ends of the connecting plate II (18) are respectively connected to the double angle steel truss main beam (14) and the upper and lower chords of the double-angle steel truss long girder (13); the other end of the double-angle steel truss girder (14) is connected with a single-angle steel truss long girder (15) horizontal to the double-angle steel truss long girder (13) , the ends of the double-angle steel truss girder (14) are welded to the upper and lower chords of the single-angle steel truss long main beam (15) and the beam end sealing plate respectively, and the double-angle steel The long main girder of the truss (15) is connected by connecting plates I (17) of the upper and lower sections, that is, the upper and lower chords of the main girder of the double-angle steel truss (14) and the long main girder of the single-angle steel truss (15) are connected with two Plate I (17) is connected by welding; the other end of the single-angle steel truss long main beam (15) is connected with the single-angle steel truss secondary beam (16), and the double-angle steel truss long main beam (13) and the single-angle steel truss long main beam (15) Horizontally opposite, the single-angle steel truss secondary beam (16) is horizontally opposite to the double-angle steel truss main beam (14), and the upper and lower chords at the end of the single-angle steel truss secondary beam (16) and the end of the single-angle steel truss long main beam (15) and The beam end sealing plates are welded and connected respectively, and the secondary beam (16) of the single-angle steel truss and the long main beam (15) of the single-angle steel truss are connected through two connecting plates I (17) connected at the upper and lower chords; the single-angle steel truss The other end of the truss secondary beam (16) is connected to the double-angle steel truss long main beam (13) through a three-phase column, and the end of the single-angle steel truss secondary beam (16) is connected to the double-angle steel truss long main beam (13). are connected by two connecting plates II (18) at the upper and lower chords; the long main girder of the double-angle steel truss (13), the main beam of the double-angle steel truss (14), the long main girder of the single-angle steel truss (15), The single-angle steel truss secondary beams (16) form a rectangular frame; two identical rectangular frames are connected to form a spliced bottom frame; the single-angle steel truss secondary beams (16) in the two rectangular frames are aligned and connected by bolts, and The two long main girders of double-angle steel trusses (13) are located on a straight line, and the two long main girders of single-angle steel trusses (15) are located on a straight line; the upper and lower ends of the two long main beams of double-angle steel trusses (13) pass through the beam end The sealing plate is connected with the joint sealing plate of the beam-column node in the two opposite directions of the three-way column by bolts, and the two single-angle steel truss secondary beams (16) are connected to the node sealing plate on the other beam-column node of the three-way column. slab; the truss slab steel frame structure is connected to the two floor slabs (19) through the upper anchors of the truss beam top chord; all components of the A slab are factory prefabrication and assembly; The B plate includes double-angle steel truss main girders (14), two single-angle steel truss long main girders (15) and (15'), single-angle steel truss secondary beams (16), connecting plate I (17), connecting plate II (18) and the floor (19), the double-angle steel truss main beam (14) and the single-angle steel truss long main beam (15) are perpendicular to each other, and the end of the double-angle steel truss main beam (14) is connected to the single-angle steel truss long main beam (15) The upper and lower chords at the end and the beam end sealing plate are connected by welding respectively, and then connected by the connecting plate I (17) of the upper and lower sections, that is, the double-angle steel truss main beam (14) and the single-angle steel truss long main beam (15) The upper and lower chords of the two connecting plates I (17) are welded and connected; the other end of the double-angle steel truss main beam (14) is connected by another single-angle steel The long main beam of the single-angle steel truss (15') is horizontally opposite to the long main beam of the single-angle steel truss (15), and the upper and lower chords of the double-angle steel truss main beam (14) and the long main beam of the single-angle steel truss (15') are connected with two The connecting plate II (18) is connected by welding; the two ends of the single-angle steel truss secondary beam (16) are respectively connected to the other end of the single-angle steel truss long main beam (15) and the other end of the single-angle steel truss long main beam (15'). At one end, the single-angle steel truss secondary beam (16) is horizontally opposite to the double-angle steel truss main beam (14), and the connection form of the single-angle steel truss secondary beam (16) and the single-angle steel truss long main beam (15) is the same as that of the double-angle steel truss main beam (15). The connection form of the beam (14) and the long main girder of the single-angle steel truss (15) is the same; 16) The upper and lower chords of the long main girder of the single-angle steel truss (15') are connected by welding with two connecting plates II (18); (15) and (15'), single-angle steel truss secondary beams (16) form a rectangular frame; the same two rectangular frames are connected to form a spliced bottom frame; single-angle steel truss secondary beams (16 ) are aligned and connected by bolts, and the single-angle steel truss long main girder (15) of a rectangular frame and the two single-angle steel truss long main girders (15) horizontally opposite to the other long direction frame are respectively located on a straight line; The upper and lower ends of the long main girder (15') of the single-angle steel truss are connected by bolts to the node sealing plate on the beam-column joint of the four-way column through the beam end sealing plate, and the two single-angle steel truss secondary beams (16) are juxtaposed Connected to the closing slabs of the beam-column joints of the four-way columns, the truss slab steel frame structure is connected to the two floor slabs (19) through the truss beam upper chord upper anchors; all components of said B slab are prefabricated and assembled in the factory ; The C board has the same structure as the B board; In the prestressed central support system of the prefabricated steel structure, plates A, B and C are spliced through the arrangement ABCBC...BCBCA. The ellipsis in the middle represents the arrangement of multiple BCs, and AB is connected by welding or screws , the three-way column connection is used at the three-way column, and the four-way column connection is used at the four-way column; The assembled column (12) is composed of a box column (8), a connecting plate (7), a rib plate (10), and a sealing plate (9). There are three types of beam-column joints, namely two-way joints and three-way joints and four-way joints; according to the different beam-column joints, it can be divided into three types of columns, namely two-way columns, three-way columns and four-way columns; two upper and lower parallel connecting plates (7) are respectively welded on the box-shaped One side of the column (8), and then two ribs (10) are welded to the box column (8) between the two connecting plates, and the connecting plate (7) and the ribs (10) are sealed with a The plates (9) are welded together, and the adjacent side of the box-shaped column (8) is similarly formed to form a two-way joint column; the two connecting plates (7) are respectively welded to one side of the box-shaped column (8), and then the two Two ribs (10) are welded to the box-shaped column (8) between the connecting plates, and the connecting plate (7) and the ribs (10) are welded to a sealing plate (9), and the box-shaped column (8 ) on the other two sides to form a three-way joint column; weld two connecting plates (7) to one side of the box column (8) respectively, and then weld two ribs (10) between the two connecting plates On the box-shaped column (8), weld the connecting plate (7) and the rib plate (10) with a sealing plate (9), and do the same on the other three sides of the box-shaped column (8) to form a four-way node column; Among them, the sealing plate (9) has bolt holes, which are spliced with the upper end sealing plate of the beam with bolts; The beams involved are mainly truss beams composed of upper and lower chords and webs spliced together, in which the upper and lower chords and webs are made of angle steel, and the angle between the webs and the chords is 30-60 degrees; and it is divided into single beams and double beams , the single beam is provided with connection holes at a fixed distance, so that two single beams can be spliced into double beams with bolts when the plate is spliced. For double beams, the connection of angle steel is bolted or welded; Or the beam involved is a truss beam mainly composed of upper and lower chords, webs and gusset plates, where the upper and lower chords use angle steel, or use channel steel, or use square steel pipes, use angle steel for the web, and use angle steel for the web and chord Angle of 30°-60°; and divided into single beam and double beam, the single beam is provided with connecting holes at a fixed distance, so that two single beams can be spliced into double beams with bolts when splicing plates. For double beams , the connection between the web, the upper and lower chords and the gusset plate is connected by bolts or welded. 3. according to claim 2 a kind of prestressed central support system of prefabricated steel structure, it is characterized in that, when A board, B board and C board are spliced, described A board and B board, A board and B board level Align, splice the end of the double-angle steel truss main beam 14 of plate A that is not connected to the beam-column node with the end of the double-angle steel truss main beam (14) of plate B that has the connecting plate I (17) through the beam end sealing plate and bolts ; One end of the single-angle steel truss secondary beam (16) of plate A that is not connected to the assembled column and the end of the single-angle steel truss secondary beam (16) of plate B that has the connecting plate I (17) are used to seal the beam end with bolts Splicing; at the bolt holes on the web of the single-angle steel truss long main beam (15) of the A plate and the single-angle steel truss long main beam (15) of the B plate, the single beams are spliced at intervals of a fixed distance through bolts, so that the two A single beam is connected to form a double beam; thereby completing the splicing of the A board and the B board; The B-plate and C-plate, align the B-plate and the C-plate horizontally, and connect one end of the double-angle steel truss girder (14) of the B-plate with the connecting plate II (18) and the three-way column (12) of the C-plate The exposed joint sealing plate of the beam-column joint is connected by bolts through the beam end sealing plate; the end of the single-angle steel truss secondary beam (16) of the B-plate with the connection plate II (18) is connected with the beam-column joint of the four-way column of the C-plate The exposed joint sealing plates are connected by bolts through the beam end sealing plates; the upper and lower ends of the single-angle steel truss long main beam (15') of the B plate are connected in two opposite directions by the beam end sealing plates and the beam-column joints of the four-way columns. The joint sealing plate is connected by bolts, and the other end of the single-angle steel truss long main beam (15') of the B plate is connected with the joint sealing plate perpendicular to the exposed joint sealing plate on the three-way column of the C plate through the beam end sealing plate respectively. ; The single-angle steel truss long main girder (15') of the B plate and the single-angle steel truss long main girder (15) of the C plate are spliced by bolts at intervals of a fixed distance, so that the two single The beams are connected to become double beams; thereby completing the splicing of the B-plate and the C-plate. The connection method between A board and C board is the same as that of A board and B board. 4. An assembled steel structure prestressed central support system according to claim 2, characterized in that, the splicing of the assembled column (12) is made by welding the splicing plates (11) on the four sides of the inner side of the box-shaped column (8), and the splicing plates (11) The lower half is welded with the box-shaped column, and the upper half has a threaded bolt hole, which is opposite to the bolt hole on the lower side of another box-shaped column, and the columns are spliced together with bolts. 5. According to claim 2, a prestressed central support system of a prefabricated steel structure is characterized in that, the prefabricated truss plate is connected with the prefabricated column by bolts at the beam-column node to form a frame structure; The stress center support member is composed of prestressed cables (23) and ear plates. The ear plates are connected to the bottom and top of the frame structure by welding or bolts or at the upper and lower chords of the truss beams (20). The prestressed cables (23) and the The ear plates at the upper and lower ends of each frame structure are connected by bolts at the construction site to form a frame-central support structure; the prestressed cables (23) are prestressed by tightening the connecting sleeve (21). 6. According to claim 5, a kind of fabricated steel structure prestressed center support system, characterized in that, said prestressed cables are high-strength steel rods, or use high-strength steel strands, high-strength section steel members, or use strips High-strength steel rods, high-strength steel strands, or high-strength section steel members of the damper. 7. An assembled steel structure prestressed central support system according to claim 2, characterized in that the floor is made of profiled steel composite floor, or reinforced concrete floor, or OSB particle board.

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